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Ben-Gurion University of the Negev
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ŒˆŠ€U_Œˆ‹ˆ—™Ž„ˆ‹
6kN
V™„‡„€™„†„ŠƒŒƒVY
B
0.9m
A
3kN
C
D
1.2m
E
1.2m
bƒ€„˜™Q
FAB = 4 kN,
FAD = 15 kN,
FBD = - 9 kN,
FBE = 5 kN,
FCD = - 16 kN,
P FDE = - 4 kN
—„‡–—‡ƒ™ŒHGU„DGT DE™„‡„€™„†„ŠƒŒƒVZ
V1631 kgˆƒ
bƒ€„˜™Q
FDE = 16 kN,
FDG = 33.9 kN,
P FHG = - 40 kN
V™„‡„€™„†„Šƒ™•T–‹†—„˜ˆ‹‘†„Ž„—‚ƒ—‡‡ƒV[
P
y
B
a
a
P FAD = FBC = FCD
x
C
A
z
P
6
P
=
3 6
FAB = FBC = FBD = −
bƒ€„˜™Q
a
D
V™„‡„€™„†„Šƒ„™„ˆ•–ˆ—ƒŒƒV\
y
A
RA = - 112.5i - 60k lb,
bƒ€„˜™Q
R B = 60k lb,
C = 112.5i +170j lb,
FBD = 127.5 lb, FAE = 212.5 lb,
FBC = FAB=0 lb, FBE=F CD = -112.5 lb,
P FAC = -170,
FDE = -60 lb,
68 in
D
C
x
24 in
E
B
z
170 lb
45 in
4 kips
9 kips
A
D
G
F
E
15 ft
J
I
K
H
15 ft
8 ft
C
B
_
V DG, FG, FH™„‡„€™„†„ŠƒŒƒV]
4 kips
15 ft
FDG = - 15 kips,
FFG = 11.9 kips,
P FFH = 15.3 kN
bƒ€„˜™Q