ÿþA d a m Z a b o r s k i
Z A D A N I A N A K O L O K W I U M Z A L I C Z E N I O W E , 2 s t . n i e s t .
2 5 k N / m
W y z n a c z y s i By p r z e k r o j o w e w z a z n a c z o n y c h p r z e k r o j a c h .
A
P
P
A
r 2
r
s i n u s o i d a
P = 1 5 k N
a
b
b
3 2 1
r = 3 m
a
a = p / 3
2 5 k N / m
b = p / 6
A
A
2 p a r a b o l a
3 2 1
O k r e [l i n o [n o [ p r z e k r o j u ( M , Q ) . D l a s t a l i : R = 2 6 0 M P a ,
R t = 1 5 0 M P a . S p o i n a p a c h w i n o w a c i g Ba . D l a d r e w n a :
R = 2 0 M P a , R t = 1 4 M P a . G w o zd z i e c o 1 0 c m , n o [n o [
n a 1 g w ó zd z : 1 . 5 k N . W s z y s t k i e w y m i a r y w c m .
Z a p i s a z a g a d n i e n i e b r z e g o w e
3
3
3
0 , 5
M
P
1 5 1 2
1 2 a l - a
P
n P
a l - a
3
3
3
3 1 0 3
2 1 0 2
3 0 3 0
O k r e [l i c h a r a k t e r y s t y k i w a |o n e p r z e k r o j u
z e s p o l o n e g o .
2 0 3 0
O k r e [l i p o Bo |e n i e o s i w a |o n e j .
M o d u By Y o u n g a d l a s t a l i E = 2 1 0 G P a ,
I P N 2 0 0
d l a b e t o n u E = 2 5 G P a , d l a d r e w n a I P N 1 0 0
E = 1 0 G P a
O k r e [l i s t o s u n e k n o [n o [c i p l a s t y c z n e j d o s p r |y s t e j
O k r e [l i n o [n o [ g r a n i c z n b e l k i ( p o r ó w n a
7 3 1 3
p r z y n a j m n i e j d w a s c h e m a t y z n i s z c z e n i a )
1
1
2 P P
7
2 m 2 m 3 m 2 m
1
1 2 1 2
P P
1
3 m 1 m 2 m 2 m
2
8
2 P
P
6
3 m 1 m 1 . 5 m 1 . 5 m
2
2 4 2
1 6 1