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Część nr 2 |
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1.0. PŁYTA |
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W projekcie przyjęto płytę o grubości i rozpiętości pomiędzy podporami: |
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hf = |
12 |
cm |
leff = L = |
2.7 |
m |
bż = |
0.2 |
m |
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1.1 Zebranie obciążeń (na 1mb płyty żelbetowej) |
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Nazwa obciążenia |
Grubość |
Ciężar objętościowy |
Obc. Charakteryst. |
γf |
Obc. Obliczeniowe |
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[m] |
[kN/m3] |
[kN/mb] |
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[kN/mb] |
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żywica epoksydowa |
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0.001 |
15 |
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0.15 |
1.2 |
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0.18 |
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wylewka |
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0.1 |
24 |
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2.4 |
1.1 |
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2.64 |
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płyta żelbet. |
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0.12 |
25 |
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3 |
1.1 |
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3.3 |
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tynk cem.-wap. |
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0.015 |
19 |
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0.285 |
1.3 |
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0.3705 |
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SUMA |
qk = |
5.835 |
- |
q = |
6.4905 |
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Obc.użytkowe |
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pk = |
7.0 |
1.2 |
p = |
8.4 |
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Obciążenie zmienne długotrwałe: |
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pklt = |
pk *ψd *1m = |
5.6 |
kPa |
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dla budownictwa przemysłowego ψd = |
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0.8 |
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1.2 Schemat statyczny |
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Płyta ośmioprzęsłowa, obliczenia wykonano dla belki pięcioprzęsłowej za pomocą tablic Winklera. |
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Obciążenie zmienne jest dowolnie ustawione na belce. |
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1.3 Momenty zginające w wybranych miejscach od obciążenia zewnętrznego. |
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1.3.1. Wzór ogólny na oblicznianie momentów przy pomocy tablic Winklera: |
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gdzie: |
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αij - |
współczynniki z tablic |
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leff - |
długość obliczeniowe równa L |
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1.3.2. Momenty przęsłowe: |
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MABmax = |
(0,078*6,4905+0,1*8,4)*2,72 = |
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9.814 |
kNm |
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MABmin = |
(0,078*6,4905-0,023*8,4)*2,72 = |
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2.282 |
kNm |
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MBCmax = |
(0,033*6,4905+0,079*8,4)*2,72 = |
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6.399 |
kNm |
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MBCmin = |
(0,033*6,4905-0,046*8,4)*2,72 = |
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-1.255 |
kNm |
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MCCmax = |
(0,046*6,4905+0,086*8,4)*2,72 = |
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7.443 |
kNm |
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MCCmin = |
(0,046*6,4905-0,039*8,4)*2,72 = |
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-0.212 |
kNm |
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1.3.3. Momenty odpowiadające: |
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odp MB = |
(-0,105*6,4905-0,053*8,4)*2,72 = |
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-8.21 |
kNm |
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odp MC = |
(-0,079*6,4905-0,039*8,4)*2,72 = |
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-6.13 |
kNm |
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1.3.4. Momenty podporowe: |
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min MB = |
(-0,105*6,4905-0,12*8,4)*2,72 = |
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-12.32 |
kNm |
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min MC = |
(-0,079*6,4905-0,111*8,4)*2,72 = |
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-10.54 |
kNm |
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1.3.5. Momenty krawędziowe: |
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QBL = |
(-0,605*6,4905-0,620*8,4)*2,7 = |
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-24.66383175 |
kN |
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QBP = |
(0,526*6,4905+0,598*8,4)*2,7 = |
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22.780 |
kN |
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QCL = |
(-0,474*6,4905-0,577*8,4)*2,7 = |
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-21.393 |
kN |
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QCP = |
(0,500*6,4905+0,591*8,4)*2,7 = |
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22.166 |
kN |
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kraw MB = |
- (|min MB| - |0,5 * bż * minQB|) = |
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-10.038 |
kNm |
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kraw MC = |
- (|min MC| - |0,5 * bż * minQC|) = |
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-8.396 |
kNm |
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1.3.6. Wartości uśrednione momentów: |
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uśr MAB = (minMAB +0,5*(odp MB))/2 = |
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-0.912 |
kNm |
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uśr MBC = (minMBC +0,5*(odp MB +odp MC))/2 = |
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-4.213 |
kNm |
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uśr MCC = (minMCC + odp MC)/2 = |
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-3.169 |
kNm |
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1.3.7. Wykres obwiedni momentów (belka piecioprzesłowa: |
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1.4. Wymiarowanie płyty: |
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1.4.1 DANE wyjściowe |
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Obliczenie otuliny zbrojenia: |
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c = |
20 |
mm |
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Do obliczeń wstępnie przyjęto pręty Φ |
8 |
mm |
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d =120-20-8/2 = |
96 |
mm |
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d = |
0.096 |
m |
, wysokość użyteczna przekroju z projektu wstępnego |
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b = |
1 |
m |
, szerokość pasma obliczeniowego |
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beton |
B25 |
→ |
fcd = |
13.3 |
MPa |
= |
13300 |
kPa |
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stal |
A-I |
→ |
fyd = |
210 |
MPa |
= |
210000 |
kPa |
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αcc = |
1.0 |
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fyk = |
240 |
MPa |
= |
240000 |
kPa |
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1.4.2. Stany graniczne nośności z uwagi na zginanie: |
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Obliczenie względnej wysokośc strefy ściskanej: |
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TO JEST NIEPOTRZEBNE !!!! |
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chyba |
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CC |
uśr MCC = |
3.169 |
1.0 |
0.096 |
0.026 |
0.0262 |
1.593 |
0.17 |
3 |
1.508 |
0.157 |
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góra |
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Φ 8 |
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Sprawdzenie czy przekrój wymaga dozbrojenia w strefie ściskanej: |
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AB |
uśr MAB = |
0.912 |
1.0 |
0.096 |
0.007 |
0.0075 |
0.454 |
0.05 |
2 |
1.005 |
0.105 |
, z Tablicy 9 normy PN-B-03264:2002 |
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góra |
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Φ 8 |
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ξeff.lim = |
0.62 |
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BC |
uśr MBC = |
4.213 |
1.0 |
0.096 |
0.034 |
0.0350 |
2.127 |
0.22 |
4 |
2.011 |
0.209 |
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góra |
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Φ 8 |
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Pole powierzchni przekroju zbrojenia: |
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Warunki konstrukcyjne dla płyt jednokierunkowych: |
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Maksymalny rozstaw zbrojenia dla płyty |
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o grubości 12 cm wynosi: |
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1,2 * 12cm = |
14.4 |
cm |
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Φ - maksymalna średnica pręta |
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dg - maksymalny wymiar ziarn kruszywa (16 mm) |
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8 |
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sI = max |
20 |
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Minimalny rozstaw prętów zbrojenia głównego wynosi 21 mm |
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21 |
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= |
2.288 |
cm2 |
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→ minimalne zbrojenie elementu |
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zginanego wynosi: |
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= |
1.248 |
cm2 |
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As1,min = |
2.288 |
cm2 |
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* UWAGA: Ze względu na zalecenia PN-B-03264:2002, aby dla płyty o grubości 12cm nie przekraczać |
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rozstawu zbrojenia 14,4 cm, dlatego w przekroju BC dół i CC dół przyjęto 8xΦ8mm |
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Sprawdzenie czy wymagane jest dozbrojenie górą: |
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Wc = b*h2/6 = |
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0.002400 |
m3 |
dla betonu B25 |
fctm = |
2.2 |
MPa |
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= |
2200 |
kPa |
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Mcr = Wc * fctm = |
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5.280 |
kNm |
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|uśr MAB| = |
0.912 |
< |
5.280 |
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Brak konieczności zbrojenia płyty górą |
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|uśr MBC| = |
4.213 |
< |
5.280 |
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Brak konieczności zbrojenia płyty górą |
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|uśr MCC| = |
3.169 |
< |
5.280 |
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Brak konieczności zbrojenia płyty górą |
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Zestawienie wyników w poniższej tabeli: |
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M [kNm] |
b [m] |
d [m] |
μcs |
ξeff |
AS1 [cm2] |
ρL [%] |
ilość zbr. |
AS1 [cm2] |
ρL [%] |
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[sztuki] |
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AB |
MABmax = |
9.814 |
1.0 |
0.096 |
0.080 |
0.0836 |
5.080 |
0.53 |
12 |
6.032 |
0.628 |
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dół |
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Φ8 |
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* |
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BC |
MBCmax = |
6.399 |
1.0 |
0.096 |
0.052 |
0.0536 |
3.262 |
0.34 |
8 |
4.021 |
0.419 |
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dół |
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Φ8 |
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* |
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CC |
MCCmax = |
7.443 |
1.0 |
0.096 |
0.061 |
0.0627 |
3.811 |
0.40 |
8 |
4.021 |
0.419 |
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dół |
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Φ8 |
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B |
min MB = |
12.316 |
1.0 |
0.096 |
0.100 |
0.1061 |
6.452 |
0.67 |
12 |
6.032 |
0.628 |
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Φ8 |
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kraw MB = |
10.038 |
1.0 |
0.096 |
0.082 |
0.0856 |
5.202 |
0.54 |
― |
― |
― |
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C |
min MC = |
10.535 |
1.0 |
0.096 |
0.086 |
0.0900 |
5.472 |
0.57 |
12 |
6.032 |
0.628 |
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Φ8 |
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kraw MC = |
8.396 |
1.0 |
0.096 |
0.068 |
0.0710 |
4.318 |
0.45 |
― |
― |
― |
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* UWAGA: Ze względu na zalecenia PN-B-03264:2002, aby dla płyty o grubości 12cm nie przekraczać |
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rozstawu zbrojenia 14,4 cm, dlatego w przekroju BC dół i CC dół przyjęto 8xΦ8mm |
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1.4.3. Stan graniczny użytkowania: |
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1.4.3.1. Szerokość rozwarcia rys prostopadłych: |
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gdzie: |
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ζ = |
0.9 |
jeżeli |
ρL ≤ 0,5 % |
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ζ = |
0.85 |
jeżeli |
0,5 < ρL ≤ 1 % |
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ζ = |
0.8 |
jeżeli |
ρL > 1 % |
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1.4.3.2. Momenty podporowe - wartości charakterystyczne: |
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min MB = |
(-0,105*5,835-0,12*5,6)*2,72 = |
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-9.37 |
kNm |
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min MC = |
(-0,079*5,835-0,111*5,6)*2,72 = |
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-7.89 |
kNm |
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1.4.3.3. Momenty krawędziowe - wartości charakterystyczne: |
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QBL = |
(-0,605*5,835-0,620*5,6)*2,7 = |
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-18.906 |
kN |
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QBP = |
(0,526*5,835+0,598*5,6)*2,7 = |
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17.329 |
kN |
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QCL = |
(-0,474*5,835-0,577*5,6)*2,7 = |
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-16.192 |
kN |
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QCP = |
(0,500*5,835+0,591*5,62,7 = |
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16.813 |
kN |
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kraw MB = |
- (|min MB| - |0,5 * bż * minQB|) = |
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-7.632 |
kNm |
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kraw MC = |
- (|min MC| - |0,5 * bż * minQC|) = |
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-6.273 |
kNm |
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Sprawdzenie ugięcia w przęsle AB |
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Msd = MABmax = |
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(0,078*5,835+0,1*5,6)*2,72 = |
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7.400 |
kNm |
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ρL = |
0.628 |
% |
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σs<fyd,fyk |
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σs = |
150351.557305273 |
kPa |
<= |
210000 |
kPa |
warunek nie przekroczony |
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σs = |
150351.557305273 |
kPa |
<= |
240000 |
kPa |
warunek nie przekroczony |
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Warunek ugięcia płyty: |
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leff = L = |
2.7 |
m |
d = |
0.096 |
m |
σs = |
150351.557305273 |
kPa |
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As/bd = |
0.628 |
% |
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leff / d = |
28 |
Przyjęto z tabeli 13 normy PN-B-03264:2002 |
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Dla wewnętrznego przęsła belki ciąglej oraz betonu >B25 |
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leff/d= |
28.125 |
> |
28 |
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warunek spełniony |
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Sprawdzenie ugięcia w przęsle BC |
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Msd = MBCmax = |
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(0,033*5,835+0,079*5,6)*2,72 = |
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4.6288 |
kNm |
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ρL = |
0.419 |
% |
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σs<fyd,fyk |
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σs = |
133228.424123764 |
kPa |
<= |
240000 |
kPa |
warunek nie przekroczony |
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σs = |
133228.424123764 |
kPa |
<= |
210000 |
kPa |
warunek nie przekroczony |
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Przęsło CC |
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Msd = MCCmax = |
|
(0,046*5,835+0,086*5,6)*2,72 = |
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5.468 |
kNm |
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ρL = |
0.419 |
% |
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σs<fyd,fyk |
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σs = |
157369.7 |
kPa |
<= |
240000 |
kPa |
warunek nie przekroczony |
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σs = |
157369.7 |
kPa |
<= |
210000 |
kPa |
warunek nie przekroczony |
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Podpora B |
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Msd =kraw MB = |
|
- (|min MB| - |0,5 * bż * minQB|) = |
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7.632 |
kNm |
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ρL = |
0.628 |
% |
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σs<fyd,fyk |
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σs = |
155067.537326555 |
kPa |
<= |
240000 |
kPa |
warunek nie przekroczony |
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σs = |
155067.537326555 |
kPa |
<= |
210000 |
kPa |
warunek nie przekroczony |
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Podpora C |
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Msd = kraw MC = |
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- (|min MC| - |0,5 * bż * minQC|) = |
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|
6.273 |
kNm |
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ρL = |
0.628 |
% |
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σs<fyd,fyk |
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σs = |
127442.433845502 |
kPa |
<= |
240000 |
kPa |
warunek nie przekroczony |
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σs = |
127442.433845502 |
kPa |
<= |
210000 |
kPa |
warunek nie przekroczony |
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Zestawienie danych |
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Przekrój |
ρL [%] |
σs [MPa] |
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AB |
0.628 |
150.351557305273 |
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BC |
0.419 |
133.228424123764 |
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CC |
0.419 |
157.4 |
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B |
0.628 |
155.067537326555 |
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C |
0.628 |
127.442433845502 |
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Analiza otrzymanych wyników |
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ρL [%] |
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σs [MPa] |
0.5 |
0.75 |
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150.351557305273 |
32 |
32 |
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133.228424123764 |
32 |
32 |
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157.4 |
32 |
32 |
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155.067537326555 |
32 |
32 |
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127.442433845502 |
32 |
32 |
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Na podstawie analizy załącznika D1 normy PN-B-03264:2002 wynika, że maksymalna średnica zbrojenia |
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to Φ 32 mm, natomiasy największa zaprojektowana to Φ 8 mm → maksymalna szerokośc rys |
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wynosząca 0,3 mm nie zostanie przekroczona- co wynika z komentarza umieszczonego nad tablicą D1 |
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Część nr 3 |
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2.0 Żebro |
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2.1 Zebranie obciążeń |
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leff = L = |
2.7 |
m |
bż = |
0.2 |
m |
hż= |
0.38 |
m |
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qk = |
5.835 |
[KN/mb] |
q = |
6.4905 |
[KN/mb] |
B= |
6.2 |
m |
<-rozpiętość żeber |
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pk = |
7.0 |
[KN/mb] |
p = |
8.4 |
[KN/mb] |
Br= |
0.5 |
m |
<-szerokość rygla |
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Obciążenia stałe: |
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ciężar płyty z wszystkimi elementami: |
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obciążenie charakterystyczne: |
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max Rbk = |
17.834094 |
[KN/m] |
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obciążenie obliczeniowe: |
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max Rb = |
19.8375642 |
[KN/m] |
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ciężar własny żebra i tynku: |
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g1k= |
(0,2*0,38*25)+(0,76*0,015*19)= |
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2.1166 |
[KN/m] |
<-obciażenie charakterystyczne |
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g1= |
(0,2*0,38*25)*1,1+(0,76*0,015*19)1,3= |
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2.37158 |
[KN/m] |
<-obciażenie obliczeniowe |
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Suma obciążeń: |
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gk= |
19.950694 |
[KN/m] |
<-obciażenie charakterystyczne |
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g= |
22.2091442 |
[KN/m] |
<-obciażenie obliczeniowe |
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Obciążenie zmienne: |
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obciażenie charakterystyczne |
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pk=max Rbk =(1,218*7*2,7)= |
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23.0202 |
[KN/m] |
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obciażenie obliczeniowe: |
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p=max Rb =(1,218*8,4*2,7)= |
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27.62424 |
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2.2.0 Schematy statyczne i wyznaczenie obwiedni sił wewnętrznych: |
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Obliczenia jak dla belki pięcio przęsłowej: |
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2.3.1. Wzór ogólny na oblicznianie momentów przy pomocy tablic Winklera: |
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gdzie: |
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αij - |
współczynniki z tablic |
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leff - |
długość obliczeniowe równa L |
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2.3.2. Momenty przęsłowe: |
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MABmax = |
(0,08*22,20914+0,101*27,62424)*6,22 = |
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175.547 |
kNm |
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MABmin = |
(0,08*22,20914-0,022*27,62424)*6,22 = |
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44.936 |
kNm |
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MBBmax = |
(0,025*22,20914+0,05*27,62424)*6,22 = |
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100.984 |
kNm |
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MBBmin = |
(0,025*22,20914-0,05*27,62424)*6,22 = |
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-31.751 |
kNm |
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2.3.3. Momenty odpowiadające: |
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odp MB = |
(-0,100*22,20914-0,05*27,62424)*6,22 = |
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-138.47 |
kNm |
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2.3.4. Momenty podporowe: |
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min MB = |
(-0,100*22,20914-0,117*27,62424)*6,22 = |
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-209.61 |
kNm |
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2.3.5. Momenty krawędziowe: |
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QBL = |
(-0,600*22,20914-0,567*27,62424)*6,2 = |
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-179.72826972 |
kN |
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QBP = |
(0,500*22,20914+0,617*27,62424)*6,2 = |
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174.522 |
kN |
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kraw MB = |
- (|min MB| - |0,5 * bż * minQB|) = |
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-192.159 |
kNm |
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2.3.6. Wartości uśrednione momentów: |
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uśr MAB = (minMAB +0,5*(odp MB))/2 = |
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-12.148 |
kNm |
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uśr MBC = (minMBB +0,5*(odp MB ))/2 = |
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-50.492 |
kNm |
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Obwiednie sił tnących: |
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maxQAp=(0,4*22,20914+0,45*27,62424)*6,2= |
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132.150307216 |
kN |
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minQBLd= -179,728+49,83338*0,72= |
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-143.848233096 |
kN |
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maxQBPd= 174,522-49,83338*0,72= |
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210.40215134 |
kN |
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maxQAPd=maxQAp-49,83338*0,72= |
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96.270270592 |
kN |
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2.4. Wymiarowanie żebra z uwagi na zginanie: |
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2.4.1. Szerokość współpracy płyty na momenty- beff |
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hf= |
0.12 |
m |
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h= |
0.5 |
m |
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bw= |
0.2 |
m |
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lo= |
6.2 |
m |
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przęsło skrajne: |
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0.527 |
m |
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beff<6*hf |
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beff= |
0.72 |
m |
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beff<0,5*bs |
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beff= |
1.25 |
m |
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Suma: beff=(2*0,527+0,2)= |
1.254 |
m |
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przęsło wewnętrzne: |
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0.434 |
m |
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beff<6*hf |
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beff= |
0.72 |
m |
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beff<0,5*bs |
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beff= |
1.25 |
m |
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Suma: beff=(2*0,434+0,2)= |
0.868 |
m |
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2.4.2. Obliczenie Wx: |
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dla przęsła skrajnego i wewnętrznego: |
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A= |
0.22648 |
m2 |
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Sx= |
0.02356 |
m2 |
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Ic= |
0.104026845637584 |
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e= |
0.1713633 |
m |
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Ix= |
0.00669918 |
m4 |
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Wx=Ix/e= |
0.03909343482531 |
m3 |
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2.5. Wymiarowanie żebra: |
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2.5.1 DANE wyjściowe |
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Obliczenie otuliny zbrojenia: |
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c = |
20 |
mm |
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Do obliczeń wstępnie przyjęto pręty Φ |
20 |
mm |
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d =500-(20+0,5*20,0)= |
470 |
mm |
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d = |
0.47 |
m |
, wysokość użyteczna przekroju z projektu wstępnego |
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b = |
1 |
m |
, szerokość pasma obliczeniowego |
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beton |
B25 |
→ |
fcd = |
13.3 |
MPa |
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13300 |
kPa |
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stal |
A-III 34GS |
→ |
fyd = |
350 |
MPa |
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350000 |
kPa |
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αcc = |
1.0 |
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fyk = |
410 |
MPa |
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410000 |
kPa |
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2.5.2. Sprawdzenie położenia osi obojętnej: |
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wyznaczenie momentu płytowego Mpl |
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Mf=fcd*beff*hf*(d-0,5hf) |
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przęsło : |
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Mf= |
567.98448 |
[KNm] |
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przęsło wewnętrzne: |
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przęsło AB |
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Msd= |
175.547 |
< |
567.98448 |
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przekrój pozornie teowy |
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przęsło BC |
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Msd= |
100.984 |
< |
567.98448 |
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przekrój pozornie teowy |
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2.5.3. Sprawdzenie konieczności zbrojenia żebra górą: |
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Wc= |
0.03909343482531 |
m4 |
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dla betonu B25 |
fctm = |
2.2 |
MPa |
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= |
2200 |
kPa |
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Mcr=W*fctm= |
86.0055566156814 |
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przęsło AB |
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|uśr MAB| = |
12.148 |
< |
86.006 |
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Brak konieczności zbrojenia płyty górą |
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przęsło BB |
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|uśr MBC| = |
50.492 |
< |
86.006 |
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Brak konieczności zbrojenia płyty górą |
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2.5.4. Stan graniczny nośności - SGN: |
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ZGINANIE: |
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Obliczenie względnej wysokośc strefy ściskanej: |
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Sprawdzenie czy przekrój wymaga dozbrojenia w strefie ściskanej: |
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, z Tablicy 9 normy PN-B-03264:2002 dla stali AIII 34GS |
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ξeff.lim = |
0.53 |
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Pole powierzchni przekroju zbrojenia: |
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Obliczenie stopnia zbrojenia podłużnego: |
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Wyznaczenie zbrojenia minimalnego: |
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= |
1.311 |
cm2 |
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→ minimalne zbrojenie elementu |
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zginanego wynosi: |
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= |
1.222 |
cm2 |
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As1,min = |
1.311 |
cm2 |
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Zestawienie wyników w poniższej tabeli: |
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M [kNm] |
b [m] |
d [m] |
μcs |
ξeff |
AS1 [cm2] |
ρL [%] |
ilość zbr. |
AS1 [cm2] |
ρL [%] |
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[sztuki] |
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AB |
MABmax = |
175.547 |
0.73 |
0.446 |
0.091 |
0.0959 |
11.812 |
0.36 |
4 |
12.566 |
1.409 |
dół |
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Φ20 |
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* |
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BB |
MBCmax = |
100.984 |
0.87 |
0.47 |
0.040 |
0.0404 |
6.265 |
0.15 |
3 |
9.425 |
1.003 |
dół |
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Φ20 |
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B |
min MB = |
209.611 |
0.2 |
0.47 |
0.357 |
0.4647 |
16.599 |
1.77 |
6 |
18.850 |
2.005 |
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Φ20 |
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kraw MB = |
192.159 |
0.2 |
0.47 |
0.327 |
0.4118 |
14.711 |
1.56 |
― |
― |
― |
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2.4.0. Wymiarowanie z uwagi na ścinanie |
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Do projektu wstępnie przyjęto zbrojenie w postaci 2-cietych strzemion prostokątnych |
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ze stali AIII-34GS o średnicy Φ8 |
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Ciężar stali : |
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1.00530964914873 |
cm2 |
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Do obliczeń wstępnie przyjęto pręty Φ |
8 |
mm |
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beton |
B25 |
→ |
fcd = |
13.3 |
MPa |
= |
13300 |
kPa |
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stal |
A-III 34GS |
→ |
fyd = |
350 |
MPa |
= |
350000 |
kPa |
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αcc = |
1.0 |
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fyk = |
410 |
MPa |
= |
410000 |
kPa |
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fctd = |
1 |
MPa |
= |
1000 |
kPa |
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fck = |
20 |
MPa |
= |
20000 |
kPa |
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d= |
0.47 |
m |
bw= |
0.2 |
m |
z=0,9*d= |
0.423 |
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2.4.1 Podpora A |
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Vsd= |
129.8081381586 |
kN |
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Wyznaczenie rodzaju odcinka: |
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k=1,6-d= |
1.13 |
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ρL = |
0.013368479376978 |
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przyjęto ρL = |
0.01 |
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δcp= |
0 |
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VRd1= |
59.4832 |
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Odcinek drugiego rodzaju : VRd1<Vsd |
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Wyznaczenie zbrojenia z uwagi na ścinanie: |
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γ= |
0.552 |
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ctgӨ= |
1 |
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VRd2= |
310.54968 |
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Warunek spełniony VRd2>Vsd |
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Rozstaw strzemion: |
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s<=0,75d |
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s= |
0.3525 |
m |
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s<=400mm |
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s= |
0.4 |
m |
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Przyjęto max. rozstaw strzemion co 35 cm. |
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Z obwiedni sił tnących z RM-WIN odcinek drugiego rodzaju ma długość: |
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c=1,46m |
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0.114658522699572 |
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Przyjęto rozstaw co 11cm |
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0.004383929015826 |
<= 0,43% |
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ρw,min= |
0.000872611893658 |
<= 0,087% |
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smax= |
57.603480794534 |
cm |
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2.4.2. Podpora BL |
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Vsd= |
182.0704387774 |
kN |
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VRd1= |
59.4832 |
kN |
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Odcinek drugiego rodzaju : VRd1<Vsd |
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wyznaczenie odcinka drugiego rodzaju: |
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Z obwiedni sił tnących z RM-WIN odcinek drugiego rodzaju ma długość: |
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c= |
2.58 |
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Strefę przypodporową dzielimy na dwa odcinki: |
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c1=1,0m |
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>==> |
x= |
138.4 |
kN |
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c2=1,58m |
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Odcinek c1=1,0m |
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VRd3=Vsd= |
182.0704387774 |
kN |
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s1= |
0.08174643536639 |
m |
<= s1= |
8.17464353663901 |
cm. |
Przyjęto rozstaw co 8cm |
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ρw= |
0.006148950988767 |
% |
<= ρw= |
0.614895098876731 |
% |
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Odcinek c2=1,58m |
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VRd3=Vsd= |
138.4 |
kN |
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s1= |
0.107540530026351 |
m |
<= s1= |
10.7540530026351 |
cm. |
Przyjęto rozstaw co 11cm |
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ρw= |
0.00467409658899 |
% |
<= ρw= |
0.467409658899021 |
% |
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Sprawdzenie warunków: |
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dla c1: Vsd<=VRd3 |
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182.0704387774 |
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2.4.2. Podpora BP: |
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Vsd= |
176.8642837734 |
kN |
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VRd1= |
59.4832 |
kN |
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Odcinek drugiego rodzaju : VRd1<Vsd |
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wyznaczenie odcinka drugiego rodzaju: |
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Z obwiedni sił tnących z RM-WIN odcinek drugiego rodzaju ma długość: |
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c= |
2.19 |
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Strefę przypodporową dzielimy na dwa odcinki: |
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c1=1,0m |
|
>==> |
x= |
109.44 |
kN |
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c2=1,19m |
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Odcinek c1=1,0m |
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VRd3=Vsd= |
176.8642837734 |
kN |
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s1= |
0.084152713244897 |
m |
<= s1= |
8.41527132448969 |
cm. |
Przyjęto rozstaw co 8cm |
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ρw= |
0.00597312677384 |
% |
<= ρw= |
0.597312677383992 |
% |
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Odcinek c2=1,19m |
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VRd3=Vsd= |
109.44 |
kN |
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s1= |
0.135997892504085 |
m |
<= s1= |
13.5997892504085 |
cm. |
Przyjęto rozstaw co 14cm |
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ρw= |
0.003696048632219 |
% |
<= ρw= |
0.369604863221884 |
% |
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2.5.0 Zbrojenie podłużne na odcinkach II-go rodzaju: |
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wpływ siły poprzecznej |
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Długość z: |
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z= |
0.423 |
m |
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Warunki: |
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439.823 |
kN |
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2.5.1.1 Podpora A: |
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Vsd= |
129.8081381586 |
kN |
ctgӨ= |
1 |
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64.904 |
kN |
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Msd= |
0.000 |
kNm |
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TD= |
64.904 |
< |
439.823 |
kN |
warunek spełniony |
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2.5.1.2 Podpora BL: |
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Vsd= |
182.0704387774 |
kN |
ctgӨ= |
1 |
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91.035 |
kN |
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Msd= |
125.139 |
kNm |
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TD= |
386.872 |
< |
439.823 |
kN |
warunek spełniony |
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2.5.1.3 Podpora BP: |
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Vsd= |
176.8642837734 |
kN |
ctgӨ= |
1 |
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88.432 |
kN |
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Msd= |
127.586 |
kNm |
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TD= |
390.054 |
< |
439.823 |
kN |
warunek spełniony |
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2.6.Stan graniczny uzytkowania - SGU. |
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2.6.1 Sprawdzenie ugięcia. |
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2.7.1.1. Wyznaczenie kombinacji obciążeń : |
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gk= |
19.951 |
kN/mb |
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pk= |
23.020 |
kN/mb |
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0,8*pk= |
18.416 |
kN/mb |
na podstawie tab.2 |
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PN-82/B-02003 współczynnik |
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obciążenie długotrwałe |
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2.7.1.2. Sprawdzenie ugięcia w przęśle A-B : |
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Wyznaczenie momentu: |
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Msd= |
(0,08*19,951+0,101*18,416)*6,22 = |
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132.852 |
kNm |
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As1= |
12.566 |
cm2 |
0.001256637061436 |
m2 |
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ρ1= |
1.409 |
% |
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ζ = |
0.9 |
jeżeli |
ρL ≤ 0,5 % |
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ζ = |
0.85 |
jeżeli |
0,5 < ρL ≤ 1 % |
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ζ = |
0.8 |
jeżeli |
ρL > 1 % |
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Przyjęto: |
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ζ = |
0.8 |
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d= |
0.47 |
m |
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281170.932950953 |
kN/m2 <= |
281.170932950953 |
Mpa |
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281.170932950953 |
< |
410 |
MPa |
warunek spełniony |
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Sprawdzenie smukłości przekroju: |
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13.1914893617021 |
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24.896 |
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24.896 |
> |
13.191 |
warunek spełniony |
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2.7.1.3. Sprawdzenie ugięcia w przęśle B-B : |
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Wyznaczenie momentu: |
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Msd= |
(0,025*19,951+0,075*18,416)*6,22 = |
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72.266 |
kNm |
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As1= |
9.425 |
cm2 |
0.000942477796077 |
m2 |
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ρ1= |
1.003 |
% |
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Przyjęto: |
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ζ = |
0.9 |
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d= |
0.47 |
m |
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181269.594459338 |
kN/m2 <= |
181.269594459338 |
Mpa |
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181.269594459338 |
< |
410 |
MPa |
warunek spełniony |
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13.1914893617021 |
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Sprawdzenie smukłości przekroju: |
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48.2706436570244 |
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48.271 |
> |
13.191 |
warunek spełniony |
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2.7.3.1. Sprawdzenie rys prostopadłych podpora B |
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Obciążenie charakterystyczne (bez długotrwałych): |
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gk= |
19.951 |
kN/mb |
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pk= |
23.020 |
kN/mb |
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Wyznaczenie momentu: |
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Msd=min MB =(-0,100*19,951-0,117*23,020)*6,22 = |
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180.22 |
kNm |
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As1= |
18.850 |
cm2 |
0.001884955592154 |
m2 |
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ρ1= |
2.005 |
% |
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d= |
0.47 |
m |
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ζ = |
0.8 |
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254285.798762654 |
kN/m2 <= |
254.285798762654 |
Mpa |
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254.285798762654 |
< |
410 |
MPa |
warunek spełniony |
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Zestawienie danych |
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Przekrój |
ρL [%] |
σs [MPa] |
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AB |
1.409 |
281.170932950953 |
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BB |
1.003 |
181.269594459338 |
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B |
2.005 |
254.285798762654 |
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Analiza otrzymanych wyników |
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ρL [%] |
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σs [MPa] |
0.75 |
1 |
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175 |
32 |
32 |
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200 |
32 |
32 |
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225 |
32 |
32 |
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250 |
28 |
32 |
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275 |
22 |
32 |
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Na podstawie analizy załącznika D1 normy PN-B-03264:2002 wynika, |
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że maksymalna średnica zbrojenia to Φ 32 mm, |
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natomiast największa zaprojektowana to Φ 22 mm → |
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maksymalna szerokośc rys wynosząca 0,3 mm nie zostanie przekroczona- |
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co wynika z komentarza umieszczonego nad tablicą D1 |
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2.7.3 Sprawdzenie rys ukośnych. |
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Dane: |
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ES= |
200 |
GPa |
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fck= |
20 |
MPa |
= |
20000 |
kPa |
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1 |
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gk= |
19.951 |
kN/mb |
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pk= |
23.020 |
kN/mb |
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0,8*pk= |
18.416 |
kN/mb |
na podstawie tab.2 |
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PN-82/B-02003 współczynnik |
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obciążenie długotrwałe |
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maxQA= |
(0,4*19,951+0,45*18,416)*6,2= |
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|
100.85880752 |
kN |
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Vsd= |
71.02462832 |
kN |
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minQBL = |
(-0,600*19,951-0,567*18,416)*6,2 = |
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-150.375312864 |
kN |
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Vsd= |
120.541133664 |
kN |
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maxQBP = |
(0,500*19,951+0,617*18,416)*6,2 = |
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141.812 |
kN |
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Vsd= |
111.977619264 |
kN |
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η= |
0.7 |
dla prętów żebrowanych |
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Vsd |
τ |
ρw |
λ |
Wk |
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A |
71.02462832 |
755.581152340426 |
0.004383929015826 |
425.797648622527 |
0.055450054521789 |
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|
BLc-1 |
120.541133664 |
1282.35248578723 |
0.006148950988767 |
303.574816269739 |
0.081185701082482 |
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|
BPc-1 |
111.977619264 |
1191.25126876596 |
0.00597312677384 |
312.510806708804 |
0.074245486959991 |
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Warunki rys ukośnych = 0,3 mm zostały spełnione |
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3.0 Rygiel |
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Momenty przęslowe: |
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max MAB= |
1252.44 |
kNm |
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min MAB= |
156.097 |
kNm |
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Momenty podporowe: |
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min MA= |
-327.7 |
kNm |
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min MB= |
2971.71 |
kNm |
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kr MAP= |
-275.88 |
kNm |
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kr MBL= |
-2884.24 |
kNm |
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kr MBP= |
-2873.91 |
kNm |
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DANE wyjściowe |
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ZGINANIE |
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Obliczenie otuliny zbrojenia: |
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lo= |
9.12 |
m |
<= z rm-wina |
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h= |
1.3 |
m |
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br= |
0.5 |
m |
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hf= |
0.12 |
m |
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beff<6*hf |
|
beff= |
0.72 |
m |
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beff<0,1*lo |
|
beff= |
0.912 |
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beff=beff*0,8= |
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1.8592 |
m |
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c = |
50 |
mm |
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Do obliczeń wstępnie przyjęto pręty Φ oraz : |
32 |
mm |
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25 |
mm |
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d = |
|
1226 |
mm |
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PODPORA |
d'=d+br/6= |
|
1234.33 |
mm |
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d = |
1.226 |
m |
, wysokość użyteczna przekroju z projektu wstępnego |
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b = |
1 |
m |
, szerokość pasma obliczeniowego |
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beton |
B25 |
→ |
fcd = |
13.3 |
MPa |
= |
13300 |
kPa |
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stal |
A-III 34GS |
→ |
fyd = |
350 |
MPa |
= |
350000 |
kPa |
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αcc = |
1.0 |
|
fyk = |
410 |
MPa |
= |
410000 |
kPa |
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fctm = |
2.2 |
MPa |
= |
2200 |
kPa |
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Sprawdzenie położenia osi obojętnej: |
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wyznaczenie momentu płytowego Mpl |
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Mf=fcd*beff*hf*(d-0,5hf) |
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przęsło : |
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Mf= |
3459.8522112 |
[KNm] |
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przęsło wewnętrzne: |
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Msd= |
1252.44 |
<= z rm-wina |
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Msd= |
1252.440 |
< |
3459.8522112 |
|
przekrój pozornie teowy |
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Sprawdzenie konieczności zbrojenia żebra górą: |
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Obliczenie Wx: |
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A= |
0.7844 |
m2 |
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Sx= |
0.426532 |
m2 |
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Ic= |
0.543768485466599 |
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e= |
0.1063 |
m |
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Ix= |
0.012349 |
m4 |
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Wx=Ix/e= |
0.116171213546566 |
m3 |
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Wc= |
0.116171213546566 |
m4 |
|
dla betonu B25 |
fctm = |
2.2 |
MPa |
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= |
2200 |
kPa |
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Mcr=W*fctm= |
255.576669802446 |
kNm |
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Stan graniczny nośności - SGN: |
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ZGINANIE: |
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Obliczenie względnej wysokośc strefy ściskanej: |
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Sprawdzenie czy przekrój wymaga dozbrojenia w strefie ściskanej: |
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, z Tablicy 9 normy PN-B-03264:2002 dla stali AIII 34GS |
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ξeff.lim = |
0.53 |
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Pole powierzchni przekroju zbrojenia: |
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Obliczenie stopnia zbrojenia podłużnego: |
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Wyznaczenie zbrojenia minimalnego: |
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= |
12.969 |
cm2 |
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→ minimalne zbrojenie elementu |
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zginanego wynosi: |
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= |
12.0848 |
cm2 |
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As1,min = |
12.969 |
cm2 |
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Zestawienie wyników w poniższej tabeli: |
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|
M [kNm] |
b [m] |
d [m] |
μcs |
ξeff |
AS1 [cm2] |
ρL [%] |
ilość zbr. |
AS1 [cm2] |
ρL [%] |
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[sztuki] |
|
|
AB(dół) |
MABmax = |
1252.440 |
1.86 |
1.226 |
0.034 |
0.0343 |
29.697 |
0.13 |
8 |
39.270 |
0.641 |
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Φ25 |
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|
A(góra) |
MkrAP= |
275.88 |
0.5 |
1.226 |
0.027600543342928 |
0.0280 |
6.52053301765012 |
0.11 |
2 |
16.085 |
0.262 |
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Φ32 |
|
|
A(góra) |
MminA |
327.7 |
0.5 |
1.23 |
0.032343713503674 |
0.0329 |
7.71216040860269 |
0.12 |
2 |
16.085 |
0.261 |
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Φ32 |
|
|
B(góra) |
MkrBL= |
2884.24 |
0.5 |
1.23433333333333 |
0.284672054427329 |
0.3438 |
80.6188559342269 |
1.31 |
11 |
88.467 |
1.433 |
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|
Φ32 |
|
|
B(góra) |
MBmin= |
2971.71 |
0.5 |
1.23 |
0.293305269624663 |
0.3570 |
83.7356883561079 |
1.36 |
11 |
88.467 |
1.433 |
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|
Φ32 |
|
|
B(góra) |
MkrBP= |
2873.91 |
0.5 |
1.23433333333333 |
0.28365249214325 |
0.3422 |
80.2549229272935 |
1.30 |
10 |
80.425 |
1.303 |
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Φ32 |
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Wymiarowanie z uwagi na ścinanie |
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Do projektu wstępnie przyjęto zbrojenie w postaci 4-cietych strzemion prostokątnych |
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ze stali AIII-34GS o średnicy Φ8 |
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Do obliczeń wstępnie przyjęto pręty Φ |
8 |
mm |
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|
beton |
B25 |
→ |
fcd = |
13.3 |
MPa |
= |
13300 |
kPa |
|
|
|
stal |
A-III 34GS |
→ |
fyd = |
350 |
MPa |
= |
350000 |
kPa |
|
|
|
αcc = |
1.0 |
|
fyk = |
410 |
MPa |
= |
410000 |
kPa |
|
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|
|
fctd = |
1 |
MPa |
= |
1000 |
kPa |
|
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|
|
fck = |
20 |
MPa |
= |
20000 |
kPa |
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|
fbd= |
2.3 |
MPa |
= |
2300 |
kPa |
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|
d= |
1.226 |
m |
br= |
0.5 |
m |
z=0,9*d= |
1.1034 |
m |
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|
0.00020106192983 |
m2 |
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Asw2= |
0.000490873852123 |
m2 |
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Podpora A |
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Wyznaczenie rodzaju odcinka: |
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k=1,6-d= |
0.374 |
|
k= |
1 |
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ρL = |
0.002623972983096 |
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δcp= |
0 |
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VRd1=[0,35*k*fctd*(1,2+40*ρL)+0,15*бcp]*br*d= |
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279.978936140932 |
kN |
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z RM-Wina odcinek c wynosi |
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c= |
2.7 |
m |
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Strefę przypodporową dzielimy na dwa odcinki: |
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c1=1,5m |
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c2=1,3m |
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Odcinek c1=1,5m |
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VRd2=٧*fcd*br*z*[ctgØ/(1+ctg2Ø)] |
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٧=0,6*(1-fck/250)= |
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0.552 |
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ctgӨ= |
1 |
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VRd2= |
2025.18036 |
kN |
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Vsd= |
422.351 |
kN |
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Odcinek II rodzaju ponieważ: |
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Vsd>VRd1 |
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Warunki które należy sprawdzić na odcinkach II rodzaju: |
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Vrd2= |
2025.18036 |
> |
422.351 |
|
warunek spełniony |
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sinα=sin(45)= |
0.850903524534118 |
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n= |
2 |
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przyjęto rozstaw strzemion: s= |
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s= |
0.25 |
m |
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Vrd31= |
310.5924267238 |
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Vrd32= |
292.380403611412 |
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VRd3=VRd31+VRd32=VRd31+n*Asw2*fywd2*sinα= |
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602.972830335211 |
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Vsd<VRd3 |
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s1= |
0.25 |
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Przyjęto rozstaw co 25cm |
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ρw= |
0.001608495438638 |
<= ρw= |
0.160849543863797 |
% |
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Odcinek c2=1,3m |
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VRd2=٧*fcd*br*z*[ctgØ/(1+ctg2Ø)] |
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٧=0,6*(1-fck/250)= |
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0.552 |
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ctgӨ= |
1 |
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VRd2= |
2025.18036 |
kN |
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Vsd= |
341.135 |
kN |
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Odcinek II rodzaju ponieważ: |
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Vsd>VRd1 |
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Warunki które należy sprawdzić na odcinkach II rodzaju: |
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Vrd2= |
2025.18036 |
> |
341.135 |
|
warunek spełniony |
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sinα=sin(45)= |
0.850903524534118 |
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n= |
2 |
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przyjęto rozstaw strzemion: s= |
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s= |
0.4 |
m |
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Vrd31= |
194.120266702375 |
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Vrd32= |
292.380403611412 |
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VRd3=VRd31+VRd32=VRd31+n*Asw2*fywd2*sinα= |
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486.500670313786 |
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Vsd<VRd3 |
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s1= |
0.4 |
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Przyjęto rozstaw co 40cm |
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ρw= |
0.001005309649149 |
<= ρw= |
0.100530964914873 |
% |
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Podpora BL: |
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Wyznaczenie rodzaju odcinka: |
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k=1,6-d= |
0.374 |
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k= |
1 |
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ρL = |
0.014431851407029 |
przyjęto |
ρL = |
0.01 |
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δcp= |
0 |
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VRd1=[0,35*k*fctd*(1,2+40*ρL)+0,15*бcp]*br*d= |
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343.28 |
kN |
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z RM-Wina odcinek c wynosi |
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c= |
2.7 |
m |
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Strefę przypodporową dzielimy na dwa odcinki: |
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c1=1,5m |
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c2=1,3m |
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Odcinek c1=1,5m |
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VRd2=٧*fcd*br*z*[ctgØ/(1+ctg2Ø)] |
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٧=0,6*(1-fck/250)= |
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0.552 |
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ctgӨ= |
1 |
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VRd2= |
2025.18036 |
kN |
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Vsd= |
778.85 |
kN |
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Odcinek II rodzaju ponieważ: |
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Vsd>VRd1 |
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Warunki które należy sprawdzić na odcinkach II rodzaju: |
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Vrd2= |
2025.18036 |
> |
778.85 |
|
warunek spełniony |
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sinα=sin(45)= |
0.850903524534118 |
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n= |
3 |
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przyjęto rozstaw strzemion: s= |
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s= |
0.2 |
m |
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Vrd31= |
388.240533404749 |
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Vrd32= |
438.570605417117 |
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VRd3=VRd31+VRd32=VRd31+n*Asw2*fywd2*sinα= |
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826.811138821867 |
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Vsd<VRd3 |
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s1= |
0.2 |
|
Przyjęto rozstaw co 20cm |
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ρw= |
0.002010619298297 |
<= ρw= |
0.201061929829747 |
% |
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Odcinek c2=1,3m |
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VRd2=٧*fcd*br*z*[ctgØ/(1+ctg2Ø)] |
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٧=0,6*(1-fck/250)= |
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0.552 |
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ctgӨ= |
1 |
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VRd2= |
2025.18036 |
kN |
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Vsd= |
584.019 |
kN |
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Odcinek II rodzaju ponieważ: |
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Vsd>VRd1 |
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Warunki które należy sprawdzić na odcinkach II rodzaju: |
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Vrd2= |
2025.18036 |
> |
584.019 |
|
warunek spełniony |
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sinα=sin(45)= |
0.850903524534118 |
|
n= |
2 |
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przyjęto rozstaw strzemion: s= |
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s= |
0.25 |
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Vrd31= |
310.5924267238 |
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Vrd32= |
292.380403611412 |
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VRd3=VRd31+VRd32=VRd31+n*Asw2*fywd2*sinα= |
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|
602.972830335211 |
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Vsd<VRd3 |
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s1= |
0.25 |
|
Przyjęto rozstaw co 25cm |
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ρw= |
0.001608495438638 |
<= ρw= |
0.160849543863797 |
% |
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Podpora BP: |
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Wyznaczenie rodzaju odcinka: |
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k=1,6-d= |
0.374 |
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k= |
1 |
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ρL = |
0.014431851407029 |
przyjęto |
ρL = |
0.01 |
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δcp= |
0 |
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VRd1=[0,35*k*fctd*(1,2+40*ρL)+0,15*бcp]*br*d= |
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|
257.46 |
kN |
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VRd2=٧*fcd*br*z*[ctgØ/(1+ctg2Ø)] |
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٧=0,6*(1-fck/250)= |
|
0.552 |
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ctgӨ= |
1 |
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VRd2= |
2025.18036 |
kN |
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Vsd= |
1167 |
kN |
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|
Odcinek II rodzaju ponieważ: |
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|
Vsd>VRd1 |
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|
Warunki które należy sprawdzić na odcinkach II rodzaju: |
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Vrd2= |
2025.18036 |
> |
1167 |
|
warunek spełniony |
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|
sinα=sin(45)= |
0.850903524534118 |
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|
Zbrojenie przekroju tylko w postaci strzemion prostopadłych: |
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s1= |
0.081573760746225 |
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Przyjęto rozstaw co 8cm |
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ρw= |
0.004929573627364 |
<= ρw= |
0.492957362736403 |
% |
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Rozstaw strzemion: |
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s<=0,75d |
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s= |
0.9195 |
m |
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s<=400mm |
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s= |
0.4 |
m |
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Przyjęto max. rozstaw strzemion co 40 cm. |
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Połączenie żebra z podciągiem |
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Vsd>VRd1 |
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Fred=F*hb/h= |
79.5992307692308 |
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gdzie, F= |
206.958 |
h= |
1.3 |
m |
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hb= |
0.5 |
m |
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Zastosowano strzemiona 4-ciete o srednicy 8mm. |
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n= |
1.13112598600318 |
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Przyjęto dwa strzemiona 4-cięte |
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Sprawdzenie ugięcia. |
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Wyznaczenie kombinacji obciążeń : |
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Od obciązeń stałych charakterystycznych i częsci długotrwałej obciążeń zmiennych |
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2.7.1.2. Sprawdzenie ugięcia w przęśle A-B : |
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Msd= |
1130.17 |
kNm |
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As1= |
39.270 |
cm2 |
0.003926990816987 |
m2 |
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ρ1= |
0.641 |
% |
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ζ = |
0.9 |
jeżeli |
ρL ≤ 0,5 % |
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ζ = |
0.85 |
jeżeli |
0,5 < ρL ≤ 1 % |
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ζ = |
0.8 |
jeżeli |
ρL > 1 % |
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Przyjęto: |
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ζ = |
0.9 |
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d= |
1.226 |
m |
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260826.01708779 |
kN/m2 <= |
260.82601708779 |
Mpa |
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260.82601708779 |
< |
410 |
MPa |
warunek spełniony |
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Sprawdzenie smukłości przekroju: |
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11.0114192495922 |
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26.838 |
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26.838 |
> |
11.011 |
warunek spełniony |
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Sprawdzenie rys prostopadłych podpora B |
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Obciążenie charakterystyczne (bez długotrwałych): |
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Msd= |
2997.00 |
kNm |
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As1= |
88.467 |
cm2 |
0.008846724912509 |
m2 |
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ρ1= |
1.433 |
% |
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d= |
1.226 |
m |
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ζ = |
0.8 |
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|
345401.136802757 |
kN/m2 <= |
345.401136802757 |
Mpa |
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345.401136802757 |
< |
410 |
MPa |
warunek spełniony |
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Zestawienie danych |
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Przekrój |
ρL [%] |
σs [MPa] |
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AB |
0.641 |
260.82601708779 |
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B |
1.433 |
345.401136802757 |
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Analiza otrzymanych wyników |
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ρL [%] |
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σs [MPa] |
0.75 |
1 |
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325 |
18 |
24 |
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350 |
16 |
20 |
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Na podstawie analizy załącznika D1 normy PN-B-03264:2002 wynika, |
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że maksymalna średnica zbrojenia to Φ 32 mm, |
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natomiast największa zaprojektowana to Φ 32 mm → |
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maksymalna szerokośc rys wynosząca 0,3 mm zostanie przekroczona- |
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co wynika z komentarza umieszczonego nad tablicą D1 |
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Sprawdzenie rys ukośnych. |
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Od obciązeń stałych charakterystycznych i częsci długotrwałej obciążeń zmiennych |
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Dane: |
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ES= |
200 |
GPa |
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fck= |
20 |
MPa |
= |
20000 |
kPa |
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1 |
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kN |
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Vsd= |
422.351 |
kN |
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minQBL = |
872.6 |
kN |
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Vsd= |
778.85 |
kN |
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maxQBP = |
1187.000 |
kN |
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Vsd= |
1167 |
kN |
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η= |
0.7 |
dla prętów żebrowanych |
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Vsd |
τ |
ρw |
λ |
Wk |
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A |
422.351 |
688.990212071778 |
0.001608495438638 |
1160.5047933784 |
0.342494190707197 |
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BL |
778.85 |
1270.55464926591 |
0.002010619298297 |
928.403834702723 |
0.745407534720788 |
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BP |
1167 |
1903.75203915171 |
0.004929573627364 |
378.666961439589 |
0.27839973672 |
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Warunki rys ukośnych = 0,3 mm nie zostały spełnione |
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Słup |
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lcd= |
4.78 |
m |
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leff= |
13.5 |
m |
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hs= |
0.5 |
m |
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bs= |
0.35 |
m |
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Ic= |
0.001786458333333 |
m2 |
<- Ic slupa |
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d= |
0.472 |
m |
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Ecm= |
30 |
GPa |
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br= |
0.5 |
m |
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hr= |
1.3 |
m |
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Ic= |
0.091541666666667 |
m2 |
<- Ic rygla |
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ka= |
18.1434575099881 |
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β= |
0.51305929192099 |
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lo= |
2.45242341538233 |
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lo/h>7 |
<- |
7.00692404394952 |
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Dla przekroju 1-1 |
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Dla max N-> odp. M |
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ea=lcol/600= |
|
7.96666666666667 |
mm => |
0.007966666666667 |
m |
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ea=h/30= |
|
16.6666666666667 |
mm |
0.016666666666667 |
m |
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ea= |
|
10 |
mm |
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max ea= |
16.6666666666667 |
mm |
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M= |
48.88 |
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Nsd= |
1475 |
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ee= |
0.033138983050848 |
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eo= |
0.049805649717514 |
m |
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Obliczenie wplywu smukłości elementu: |
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Nsd,lt= |
1005 |
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Nsd= |
1475 |
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fcd= |
13.3 |
MPa |
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Ø(∞,to)= |
2.5 |
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klt= |
1.85169491525424 |
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eo/h=0,50-0,01(lo/h)-0,01fcd= |
|
|
0.296930759560505 |
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ES= |
200 |
GPa |
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Ecm= |
30 |
GPa |
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Ic= |
0.001786458333333 |
m2 |
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Ac=3*Ø16= |
0.0006031857 |
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Ics= |
5.52469846344E-05 |
m2 |
???????? |
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|
24.7012915895098 |
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|
1.06350561794661 |
????? |
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elot= |
0.052968588280057 |
m |
?????????? |
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Wyznaczenie Zbrojenia w elementach ściskanych według założeń metody uproszczonej |
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Zakładamy przypadek dużego mimośrodu : |
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|
ξeff.lim = |
0.53 |
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|
|
fyd = |
350 |
MPa |
= |
350000 |
kPa |
|
|
|
fcd = |
13.3 |
MPa |
= |
13300 |
kPa |
|
|
|
αcc = |
1.0 |
|
|
|
|
|
|
|
a1= |
0.036 |
|
|
|
|
|
|
|
a2= |
0.036 |
|
|
|
|
|
|
|
As,min= |
0.000632142857143 |
m2 |
|
|
|
|
|
|
As,min= |
0.000525 |
m2 |
As,min= |
0.001 |
m2 |
6.32142857142857 |
cm2 |
|
As,max= |
0.007 |
m2 |
|
|
|
|
|
|
es1= |
0.266968588280057 |
m |
|
|
|
|
|
|
es2= |
0.161031411719943 |
m |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
As2= |
-6.68929770833251E-05 |
m2 |
-0.668929770833251 |
cm2 |
|
|
|
|
|
|
|
|
|
|
|
|
|
As,min>As2 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
0.38955 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
0.53 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
0.25016 |
|
|
|
|
|
|
|
|
|
|
|
|
|
Przypadek 2.2.1 xeff>2*a2 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
As1= |
-0.000954050691369 |
|
|
|
|
|
|
|
As1 jest mniesze od 0 wiec mównimy o małym mimośrodzie,zbrojenie w strefie mniej ściskanej jest zbedne. |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
0.757361648945415 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Przypadek 3.2 |
|
|
|
|
|
|
|
|
|
|
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|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
es1= |
0.266968588280057 |
|
|
|
|
|
|
|
es2= |
0.161031411719943 |
|
|
|
|
|
|
|
As2= |
-0.000817503881304 |
????? |
|
|
|
|
|
|
As1= |
0.001318151491369 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Dla przekroju 1-1 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Dla max M-> odp. N |
|
|
|
|
|
|
|
|
Nsd= |
1397.92 |
|
|
|
|
|
|
|
M= |
65.994 |
|
|
|
|
|
|
|
ea=h/30= |
16.6666666666667 |
mm |
0.016666666666667 |
m |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
max ea= |
0.016666666666667 |
m |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
M= |
65.994 |
|
|
|
|
|
|
|
Nsd= |
1397.92 |
|
|
|
|
|
|
|
ee= |
0.047208710083553 |
m |
|
|
|
|
|
|
eo= |
0.063875376750219 |
m |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Obliczenie wplywu smukłości elementu: |
|
|
|
|
|
|
|
|
Nsd,lt= |
1005 |
|
|
|
|
|
|
|
Nsd= |
1397.92 |
|
|
|
|
|
|
|
fcd= |
13.3 |
MPa |
|
|
|
|
|
|
Ø(∞,to)= |
2.5 |
|
|
|
|
|
|
|
klt= |
1.89865657548358 |
|
|
|
|
|
|
|
eo/h=0,50-0,01(lo/h)-0,01fcd= |
|
|
0.296930759560505 |
|
|
|
|
|
ES= |
200 |
GPa |
|
|
|
|
|
|
Ecm= |
30 |
GPa |
|
|
|
|
|
|
Ic= |
0.001786458333333 |
m2 |
|
|
|
|
|
|
Ics= |
5.52469846344E-05 |
m2 |
???????? |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
24.499292087196 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
1.06051242301641 |
????? |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
elot= |
0.067740630568462 |
m |
?????????? |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Wyznaczenie Zbrojenia w elementach ściskanych według założeń metody uproszczonej |
|
|
|
|
|
|
|
|
Zakładamy przypadek dużego mimośrodu : |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
ξeff.lim = |
0.53 |
|
|
|
|
|
|
|
fyd = |
350 |
MPa |
= |
350000 |
kPa |
|
|
|
fcd = |
13.3 |
MPa |
= |
13300 |
kPa |
|
|
|
αcc = |
1.0 |
|
|
|
|
|
|
|
a1= |
0.036 |
|
|
|
|
|
|
|
a2= |
0.036 |
|
|
|
|
|
|
|
As,min= |
0.000599108571429 |
m2 |
|
|
|
|
|
|
As,min= |
0.000525 |
m2 |
As,min= |
0.001 |
m2 |
5.99108571428571 |
cm2 |
|
As,max= |
0.007 |
m2 |
|
|
|
|
|
|
es1= |
0.281740630568462 |
m |
|
|
|
|
|
|
es2= |
0.146259369431538 |
m |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
As2= |
-6.64198802866067E-05 |
m2 |
-0.664198802866067 |
cm2 |
|
|
|
|
|
|
|
|
|
|
|
|
|
As2<As2,min |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
0.291619611460935 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
0.354429882136627 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
0.167290904368488 |
|
|
|
|
|
|
|
|
|
|
|
|
|
Przypadek 2.2.1 xeff>2*a2 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
As1= |
-0.001169979543328 |
|
|
|
|
|
|
|
As1 jest mniesze od 0 wiec mównimy o małym mimośrodzie,zbrojenie w strefie mniej ściskanej jest zbedne. |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
0.708823424441288 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Przypadek 3.2 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
es1= |
0.281740630568462 |
|
|
|
|
|
|
|
es2= |
0.146259369431538 |
|
|
|
|
|
|
|
As2= |
-49.4281808014845 |
|
|
|
|
|
|
|
As1= |
0.105106766917293 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Dla przekroju 2-2 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Dla max N-> odp. M |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
ea=lcol/600= |
|
7.96666666666667 |
mm => |
0.007966666666667 |
m |
|
|
|
ea=h/30= |
|
16.6666666666667 |
mm |
0.016666666666667 |
m |
|
|
|
ea= |
|
10 |
mm |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
max ea= |
16.6666666666667 |
mm |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
M= |
75.483 |
|
|
|
|
|
|
|
Nsd= |
1475 |
|
|
|
|
|
|
|
ee= |
0.051174915254237 |
|
|
|
|
|
|
|
eo= |
0.067841581920904 |
m |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Obliczenie wplywu smukłości elementu: |
|
|
|
|
|
|
|
|
Nsd,lt= |
1082 |
|
|
|
|
|
|
|
Nsd= |
1475 |
|
|
|
|
|
|
|
fcd= |
13.3 |
MPa |
|
|
|
|
|
|
Ø(∞,to)= |
2.5 |
|
|
|
|
|
|
|
klt= |
1.91694915254237 |
|
|
|
|
|
|
|
eo/h=0,50-0,01(lo/h)-0,01fcd= |
|
|
0.296930759560505 |
|
|
|
|
|
ES= |
200 |
GPa |
|
|
|
|
|
|
Ecm= |
30 |
GPa |
|
|
|
|
|
|
Ic= |
0.001786458333333 |
m2 |
|
|
|
|
|
|
Ac=3*Ø16= |
0.0006031857 |
|
|
|
|
|
|
|
Ics= |
5.52469846344E-05 |
m2 |
???????? |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
24.4232873623178 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
1.06427494900652 |
????? |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
elot= |
0.072202096139392 |
m |
?????????? |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Wyznaczenie Zbrojenia w elementach ściskanych według założeń metody uproszczonej |
|
|
|
|
|
|
|
|
Zakładamy przypadek dużego mimośrodu : |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
ξeff.lim = |
0.53 |
|
|
|
|
|
|
|
fyd = |
350 |
MPa |
= |
350000 |
kPa |
|
|
|
fcd = |
13.3 |
MPa |
= |
13300 |
kPa |
|
|
|
αcc = |
1.0 |
|
|
|
|
|
|
|
a1= |
0.036 |
|
|
|
|
|
|
|
a2= |
0.036 |
|
|
|
|
|
|
|
As,min= |
0.000632142857143 |
m2 |
|
|
|
|
|
|
As,min= |
0.000525 |
m2 |
As,min= |
0.001 |
m2 |
6.32142857142857 |
cm2 |
|
As,max= |
0.007 |
m2 |
|
|
|
|
|
|
es1= |
0.286202096139392 |
m |
|
|
|
|
|
|
es2= |
0.141797903860608 |
m |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
As2= |
0.000119014127062 |
m2 |
1.19014127061619 |
cm2 |
|
|
|
|
|
|
|
|
|
|
|
|
|
As2<As2,min |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
0.314044744322489 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
0.390155338340146 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
0.184153319696549 |
|
|
|
|
|
|
|
|
|
|
|
|
|
Przypadek 2.2.1 xeff>2*a2 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
As1= |
-0.001132903705179 |
|
|
|
|
|
|
|
As1 jest mniesze od 0 wiec mównimy o małym mimośrodzie,zbrojenie w strefie mniej ściskanej jest zbedne. |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
0.71593746154473 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Przypadek 3.1 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
es1= |
0.286202096139392 |
|
|
|
|
|
|
|
es2= |
0.141797903860608 |
|
|
|
|
|
|
|
As2= |
-0.000280083294307 |
?????? |
|
|
|
|
|
|
As1= |
0.001 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Dla przekroju 2-2 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Dla max M-> odp. N |
|
|
|
|
|
|
|
|
Nsd= |
1363 |
|
|
|
|
|
|
|
M= |
192.36 |
|
|
|
|
|
|
|
ea=h/30= |
16.6666666666667 |
mm |
0.016666666666667 |
m |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
max ea= |
0.016666666666667 |
m |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
M= |
192.36 |
|
|
|
|
|
|
|
Nsd= |
1363 |
|
|
|
|
|
|
|
ee= |
0.141129860601614 |
m |
|
|
|
|
|
|
eo= |
0.157796527268281 |
m |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Obliczenie wplywu smukłości elementu: |
|
|
|
|
|
|
|
|
Nsd,lt= |
1082 |
|
|
|
|
|
|
|
Nsd= |
1363 |
|
|
|
|
|
|
|
fcd= |
13.3 |
MPa |
|
|
|
|
|
|
Ø(∞,to)= |
2.5 |
|
|
|
|
|
|
|
klt= |
1.992296404989 |
|
|
|
|
|
|
|
eo/h=0,50-0,01(lo/h)-0,01fcd= |
|
|
0.296930759560505 |
|
|
|
|
|
ES= |
200 |
GPa |
|
|
|
|
|
|
Ecm= |
30 |
GPa |
|
|
|
|
|
|
Ic= |
0.001786458333333 |
m2 |
|
|
|
|
|
|
Ics= |
5.52469846344E-05 |
m2 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
24.1249376765469 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
1.05988066654819 |
????? |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
elot= |
0.167245488500095 |
m |
?????????? |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Wyznaczenie Zbrojenia w elementach ściskanych według założeń metody uproszczonej |
|
|
|
|
|
|
|
|
Zakładamy przypadek dużego mimośrodu : |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
ξeff.lim = |
0.53 |
|
|
|
|
|
|
|
fyd = |
350 |
MPa |
= |
350000 |
kPa |
|
|
|
fcd = |
13.3 |
MPa |
= |
13300 |
kPa |
|
|
|
αcc = |
1.0 |
|
|
|
|
|
|
|
a1= |
0.036 |
|
|
|
|
|
|
|
a2= |
0.036 |
|
|
|
|
|
|
|
As,min= |
0.000584142857143 |
m2 |
|
|
|
|
|
|
As,min= |
0.000525 |
m2 |
As,min= |
0.001 |
m2 |
5.84142857142857 |
cm2 |
|
As,max= |
0.007 |
m2 |
|
|
|
|
|
|
es1= |
0.381245488500095 |
m |
|
|
|
|
|
|
es2= |
0.046754511499905 |
m |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
As2= |
0.00075787067372 |
m2 |
7.57870673719723 |
cm2 |
|
|
|
|
|
|
|
|
|
|
|
|
|
As2>As2,min |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
As1= |
1.69851428571426E-05 |
m2 |
0.169851428571426 |
cm2 |
|
|
|
|
|
|
|
|
|
|
|
|
|
SŁUP 2 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
lcd= |
4.78 |
m |
|
|
|
|
|
|
leff= |
13.5 |
m |
|
|
|
|
|
|
hs= |
0.5 |
m |
|
|
|
|
|
|
bs= |
0.35 |
m |
|
|
|
|
|
|
Ic= |
0.001786458333333 |
m2 |
<- Ic slupa |
|
|
|
|
|
d= |
0.472 |
m |
|
|
|
|
|
|
Ecm= |
30 |
GPa |
|
|
|
|
|
|
br= |
0.5 |
m |
|
|
|
|
|
|
hr= |
1.3 |
m |
|
|
|
|
|
|
Ic= |
0.091541666666667 |
m2 |
<- Ic rygla |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
ka= |
18.1434575099881 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
β= |
0.51305929192099 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
lo= |
2.45242341538233 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
lo/h>7 |
<- |
7.00692404394952 |
|
|
|
|
|
|
Wstęonie przyjęto prety: |
|
Ø= |
18 |
mm |
|
|
|
|
|
|
|
|
|
|
|
|
|
Dla przekroju 1-1 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Dla max N-> odp. M |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
ea=lcol/600= |
|
7.96666666666667 |
mm => |
0.007966666666667 |
m |
|
|
|
ea=h/30= |
|
16.6666666666667 |
mm |
0.016666666666667 |
m |
|
|
|
ea= |
|
10 |
mm |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
max ea= |
16.6666666666667 |
mm |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
M= |
31.92 |
|
|
|
|
|
|
|
Nsd= |
2122.04 |
|
|
|
|
|
|
|
ee= |
0.015042129271833 |
|
|
|
|
|
|
|
eo= |
0.0317087959385 |
m |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Obliczenie wplywu smukłości elementu: |
|
|
|
|
|
|
|
|
Nsd,lt=0,8*Nsd= |
1697.632 |
|
|
|
|
|
|
|
Nsd= |
2122.04 |
|
|
|
|
|
|
|
fcd= |
13.3 |
MPa |
|
|
|
|
|
|
Ø(∞,to)= |
2.5 |
|
|
|
|
|
|
|
klt= |
2 |
|
|
|
|
|
|
|
eo/h= |
0.063417591876999 |
|
|
|
|
|
|
|
eo/h=0,50-0,01(lo/h)-0,01fcd= |
|
0.296930759560505 |
|
max(eo/h=) |
0.296930759560505 |
|
|
|
eo/h= |
0.05 |
|
|
|
|
|
|
|
ES= |
200 |
GPa |
|
|
|
|
|
|
Ecm= |
30 |
GPa |
|
|
|
|
|
|
Ic= |
0.001786458333333 |
m2 |
|
|
|
|
|
|
Ac=2*Ø18= |
0.000508938009882 |
m2 |
|
|
|
|
|
|
Is= |
4.66146502010706E-05 |
m2 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
21.5121924571641 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
1.10943905700009 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
elot= |
0.035178976664617 |
m |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Wyznaczenie Zbrojenia w elementach ściskanych według założeń metody uproszczonej |
|
|
|
|
|
|
|
|
Zakładamy przypadek dużego mimośrodu : |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
ξeff.lim = |
0.53 |
|
|
|
|
|
|
|
fyd = |
350 |
MPa |
= |
350000 |
kPa |
|
|
|
fcd = |
13.3 |
MPa |
= |
13300 |
kPa |
|
|
|
αcc = |
1.0 |
|
|
|
|
|
|
|
a1= |
0.036 |
|
|
|
|
|
|
|
a2= |
0.036 |
|
|
|
|
|
|
|
As,min= |
0.000909445714286 |
m2 |
|
|
|
|
|
|
As,min= |
0.000525 |
m2 |
As,min= |
0.001 |
m2 |
9.09445714285714 |
cm2 |
|
As,max= |
0.007 |
m2 |
|
|
|
|
|
|
es1= |
0.249178976664617 |
m |
|
|
|
|
|
|
es2= |
0.178821023335383 |
m |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
As2= |
0.000817701308161 |
m2 |
8.17701308161101 |
cm2 |
|
|
|
|
|
|
|
|
|
|
|
|
|
As2>As2,min |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
As1= |
-0.001826397714286 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
0.894852425082757 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Przypadek 3.1 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
As2= |
0.000445445844872 |
m2 |
4.45445844871915 |
cm2 |
|
|
|
|
|
|
|
|
|
|
|
|
|
As1= |
0.001 |
m2 |
9.09445714285714 |
cm2 |
|
|
|
|
|
|
|
|
|
|
|
|
|
Dla przekroju 1-1 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Dla max M-> odp. N |
|
|
|
|
|
|
|
|
Nsd= |
1796.36 |
|
|
|
|
|
|
|
M= |
119.83 |
|
|
|
|
|
|
|
ea=h/30= |
16.6666666666667 |
mm |
0.016666666666667 |
m |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
max ea= |
0.016666666666667 |
m |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
M= |
119.83 |
|
|
|
|
|
|
|
Nsd= |
1796.36 |
|
|
|
|
|
|
|
ee= |
0.066707118840322 |
m |
|
|
|
|
|
|
eo= |
0.083373785506988 |
m |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Obliczenie wplywu smukłości elementu: |
|
|
|
|
|
|
|
|
Nsd,lt=0,8*Nsd= |
1437.088 |
|
|
|
|
|
|
|
Nsd= |
1796.36 |
|
|
|
|
|
|
|
fcd= |
13.3 |
MPa |
|
|
|
|
|
|
Ø(∞,to)= |
2.5 |
|
|
|
|
|
|
|
klt= |
2 |
|
|
|
|
|
|
|
eo/h= |
0.166747571013976 |
|
|
|
|
|
|
|
eo/h=0,50-0,01(lo/h)-0,01fcd= |
|
0.296930759560505 |
|
max(eo/h=) |
0.296930759560505 |
|
|
|
eo/h= |
0.05 |
|
|
|
|
|
|
|
ES= |
200 |
GPa |
|
|
|
|
|
|
Ecm= |
30 |
GPa |
|
|
|
|
|
|
Ic= |
0.001786458333333 |
m2 |
|
|
|
|
|
|
Ac=2*Ø18= |
0.000508938009882 |
m2 |
|
|
|
|
|
|
Is= |
4.66146502010706E-05 |
m2 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
21.5121924571641 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
1.09111256163811 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
elot= |
0.090970184677996 |
m |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Wyznaczenie Zbrojenia w elementach ściskanych według założeń metody uproszczonej |
|
|
|
|
|
|
|
|
Zakładamy przypadek dużego mimośrodu : |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
ξeff.lim = |
0.53 |
|
|
|
|
|
|
|
fyd = |
350 |
MPa |
= |
350000 |
kPa |
|
|
|
fcd = |
13.3 |
MPa |
= |
13300 |
kPa |
|
|
|
αcc = |
1.0 |
|
|
|
|
|
|
|
a1= |
0.036 |
|
|
|
|
|
|
|
a2= |
0.036 |
|
|
|
|
|
|
|
As,min= |
0.000769868571429 |
m2 |
|
|
|
|
|
|
As,min= |
0.000525 |
m2 |
As,min= |
0.001 |
m2 |
7.69868571428571 |
cm2 |
|
As,max= |
0.007 |
m2 |
|
|
|
|
|
|
es1= |
0.304970184677996 |
m |
|
|
|
|
|
|
es2= |
0.123029815322004 |
m |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
As2= |
0.000942658616856 |
m2 |
9.42658616855605 |
cm2 |
|
|
|
|
|
|
|
|
|
|
|
|
|
As2>As2,min |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
As1= |
-0.001035460571429 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
0.693292629088727 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Przypadek 3.1 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
As2= |
0.00078024333449 |
m2 |
7.8024333448975 |
cm2 |
|
|
|
|
|
|
|
|
|
|
|
|
|
As1= |
0.001 |
m2 |
7.69868571428571 |
cm2 |
|
|
|
|
|
|
|
|
|
|
|
|
|
Dla przekroju 2-2 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Dla max N-> odp. M |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
ea=lcol/600= |
|
7.96666666666667 |
mm => |
0.007966666666667 |
m |
|
|
|
ea=h/30= |
|
16.6666666666667 |
mm |
0.016666666666667 |
m |
|
|
|
ea= |
|
10 |
mm |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
max ea= |
16.6666666666667 |
mm |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
M= |
18.34 |
|
|
|
|
|
|
|
Nsd= |
2101.96 |
|
|
|
|
|
|
|
ee= |
0.008725189822832 |
|
|
|
|
|
|
|
eo= |
0.025391856489499 |
m |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Obliczenie wplywu smukłości elementu: |
|
|
|
|
|
|
|
|
Nsd,lt=0,8*Nsd= |
1681.568 |
|
|
|
|
|
|
|
Nsd= |
2101.96 |
|
|
|
|
|
|
|
fcd= |
13.3 |
MPa |
|
|
|
|
|
|
Ø(∞,to)= |
2.5 |
|
|
|
|
|
|
|
klt= |
2 |
|
|
|
|
|
|
|
eo/h= |
0.050783712978997 |
|
|
|
|
|
|
|
eo/h=0,50-0,01(lo/h)-0,01fcd= |
|
0.296930759560505 |
|
max(eo/h=) |
0.296930759560505 |
|
|
|
eo/h= |
0.05 |
|
|
|
|
|
|
|
ES= |
200 |
GPa |
|
|
|
|
|
|
Ecm= |
30 |
GPa |
|
|
|
|
|
|
Ic= |
0.001786458333333 |
m2 |
|
|
|
|
|
|
Ac=2*Ø18= |
0.000508938009882 |
m2 |
|
|
|
|
|
|
Ics= |
4.66146502010706E-05 |
m2 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
21.5121924571641 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
1.10829133574978 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
elot= |
0.028141574545913 |
m |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Wyznaczenie Zbrojenia w elementach ściskanych według założeń metody uproszczonej |
|
|
|
|
|
|
|
|
Zakładamy przypadek dużego mimośrodu : |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
ξeff.lim = |
0.53 |
|
|
|
|
|
|
|
fyd = |
350 |
MPa |
= |
350000 |
kPa |
|
|
|
fcd = |
13.3 |
MPa |
= |
13300 |
kPa |
|
|
|
αcc = |
1.0 |
|
|
|
|
|
|
|
a1= |
0.036 |
|
|
|
|
|
|
|
a2= |
0.036 |
|
|
|
|
|
|
|
As,min= |
0.00090084 |
m2 |
|
|
|
|
|
|
As,min= |
0.000525 |
m2 |
As,min= |
0.001 |
m2 |
9.0084 |
cm2 |
|
As,max= |
0.007 |
m2 |
|
|
|
|
|
|
es1= |
0.242141574545913 |
m |
|
|
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es2= |
0.185858425454087 |
m |
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As2= |
0.000687977509938 |
m2 |
6.87977509937927 |
cm2 |
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As2<As2,min |
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0.358227963649114 |
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0.467511434205605 |
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0.220665396945046 |
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Przypadek 2.2.1 xeff>2*a2 |
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As1= |
-0.002169910220631 |
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As1 jest mniesze od 0 wiec mównimy o małym mimośrodzie,zbrojenie w strefie mniej ściskanej jest zbedne. |
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0.94760931129698 |
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Przypadek 3.1 |
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es1= |
0.242141574545913 |
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es2= |
0.185858425454087 |
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As2= |
5.68877874020784E-05 |
m2 |
0.568877874020784 |
cm2 |
<- Przyjmuje:As2,min/2= |
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4.5042 |
cm2 |
As1= |
0.001 |
m2 |
9.0084 |
cm2 |
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Dla przekroju 2-2 |
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Dla max M-> odp. N |
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Nsd= |
1611.63 |
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M= |
166.15 |
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ea=h/30= |
16.6666666666667 |
mm |
0.016666666666667 |
m |
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max ea= |
0.016666666666667 |
m |
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M= |
166.15 |
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Nsd= |
1611.63 |
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ee= |
0.103094382705708 |
m |
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eo= |
0.119761049372375 |
m |
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Obliczenie wplywu smukłości elementu: |
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Nsd,lt=0,8*Nsd= |
1289.304 |
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Nsd= |
1611.63 |
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fcd= |
13.3 |
MPa |
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Ø(∞,to)= |
2.5 |
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klt= |
2 |
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eo/h= |
0.239522098744749 |
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eo/h=0,50-0,01(lo/h)-0,01fcd= |
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0.296930759560505 |
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max(eo/h=) |
0.296930759560505 |
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eo/h= |
0.05 |
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ES= |
200 |
GPa |
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Ecm= |
30 |
GPa |
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Ic= |
0.001786458333333 |
m2 |
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Ac=2*Ø18= |
0.000508938009882 |
m2 |
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Ics= |
4.66146502010706E-05 |
m2 |
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21.5121924571641 |
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1.08098414321048 |
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elot= |
0.129459795345784 |
m |
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Wyznaczenie Zbrojenia w elementach ściskanych według założeń metody uproszczonej |
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Zakładamy przypadek dużego mimośrodu : |
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ξeff.lim = |
0.53 |
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fyd = |
350 |
MPa |
= |
350000 |
kPa |
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fcd = |
13.3 |
MPa |
= |
13300 |
kPa |
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αcc = |
1.0 |
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a1= |
0.036 |
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a2= |
0.036 |
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As,min= |
0.000690698571429 |
m2 |
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As,min= |
0.000525 |
m2 |
As,min= |
0.001 |
m2 |
6.90698571428572 |
cm2 |
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As,max= |
0.007 |
m2 |
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es1= |
0.343459795345784 |
m |
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es2= |
0.084540204654216 |
m |
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As2= |
0.000979970995787 |
m2 |
9.79970995787193 |
cm2 |
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As2>As2,min |
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As1= |
-0.000586830571429 |
m2 |
-5.86830571428572 |
cm2 |
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As1 jest mniesze od 0 wiec mównimy o małym mimośrodzie,zbrojenie w strefie mniej ściskanej jest zbedne. |
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0.594513109603942 |
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es1= |
0.343459795345784 |
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es2= |
0.084540204654216 |
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As2= |
0.000872541646007 |
m2 |
8.72541646007436 |
cm2 |
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As1= |
0.001 |
m2 |
6.90698571428572 |
cm2 |
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Wartosć max obliczeniowego przekroju zbrojenia w 4 przypadkach: |
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maxAs2= |
0.000872541646007 |
m2 |
8.72541646007436 |
cm2 |
<-użyto 4 pretów Ø18 |
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maxAs1= |
0.001 |
m2 |
9.09445714285714 |
cm2 |
<-użyto 4 pretów Ø18 |
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Wartości zbrojenia sa wieksze niż wartości minimalne a nie przekraczaja |
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wielkości maksymalnych dla przekroju poprzecznego prętów. |
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Przyjęto strzemiona 4 cięte Ø18 |
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ρ = |
1.3 |
<- |
15Ø |
27 |
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b,h |
35 |
50 |
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400mm |
40 |
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smax= |
27 |
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