Civil Engineering Reference
In-Depth Information
Sum horizontal forces:
F
3
=
3912 9
.
−
1975 80 1937 1
.
+=
.
lb compressio
n
BH
()
Segment H:
Sum moments about grid line 4B:
2
200 55
2
(.)
1
55
F
3
=
1591 38 55
.
(.)
−
1975 82
.()
+
=
1422 9
. bcompression
B()
.
Sum horizontal forces:
V
3
=
1975 8
.
+
1937 1
.
=
3912 9
. bactingtoleft
Sum moments about grid line 3A:
2
200 55
2
(.)
1
5
F
4
B
=
3912 92
.()
−
1937 12
. ()
+
=
1268 5
. bcompression
.5
Sum vertical forces:
∑
1422 9
V
=
.
+
1268 5
.
−
1591 38
.
−
200 55
(.)
=
0
lb
∴
K
Segment I:
Sum vertical forces:
∑
2691 38
V
=
.
−
1422 9
.
−
1268 50
.
=
lb
∴
K
Sum horizontal forces:
V
B
= 3912 9
.
lb acting to rightwhich is equal
and opposite to
V
∴
OK
.5
Segment J:
Sum horizontal forces:
V
B
=
3912 9
.
lb acting to right
.
5
The shear at the bottom of the segment is equal to but opposite in direction to
V
B.5
,
acting to the left.
Sum moments about grid line 4C:
3912 92
55
.()
F
3
=
=
1422 88
.
lb tension
CV
()
.
Sum vertical forces:
F
4
=
1422 88
.
+
2691 38
.
=
4114 3
.
lb compression
C
Segment K:
All the forces acting on panel K have been determined, but must be
verified.
Search WWH ::
Custom Search