-
13
____________________________________
:
h= _____________________
b= _____________________
_______________ ____________________
_______________ ____________________
__________________ ______________________
;
F= ___________
:
_________ ________Δ1=
_________ _______Δ2=
, 䳺 _______________
, ______ 1=
г
_____________
14
,
- ; 䳿 , .
- , 䳺 , . , l (. 14.1), F, 0 α (. 14.2), .
. 14.1. |
F :
; (14.1)
. 14.2. 䳿 |
䳿 , , . ³ 䳿 Fy Fz , , :
; , (14.2)
- , Iz Iy - , .
fy fz:
(14.3)
³ γ, :
(14.4)
䳿 , . , , :
(14.5)
Wx , .
1. 0,01 , - l 1 .
|
|
2. , .
3. F1 .
4. , F2 .
5. , .
6. γ , (14.2-14.4). . , . .
14
____________________________________
____________ ____________________
_________________________________ ____________________
_____________ _________________________
__________________ ____________________________
_______________ 160
_____________________________________________________
F= __________________________________________
:
_____________________
____________________
_________________________
䳺 β=45 - γ= ________________
_________________________γ=______________________
/ | - , F | ||||||||
³, | fa, | ||||||||
³, | fmax, | ³, | fmin, | ||||||
15