Civil Engineering Reference
In-Depth Information
P
L
C
D
E
h
p
A
B
d
t
(
h
e
+
h
p
)/2
V
e
V
e
P
e
b
t
P
e
FIGURE E5.13
Knee-braced portal frame.
h
e
+
1
,
+
P
L
2
h
p
2
h
p
P
C
=
−
−
P
L
2
P
D
=
,
h
e
+
1
,
h
p
2
h
p
−
P
L
2
P
E
=
+
P
L
(h
e
+
h
p
)/
2
1
,
−
b
t
b
t
−
V
C
=
V
E
=
−
b
t
d
t
P
L
(h
e
+
h
p
)/
2
+
V
D
=
,
b
t
P
L
(h
e
+
h
p
)/
2
M
E
=
d
t
.
2
b
t
Example 5.14
The axial forces in triangular portal frame members (
Figure E5.14)
are
P
L
(h
e
+
h
p
)/
2
b
t
2
2
,
+
h
p
+
P
A
=−
P
B
=
b
t
h
p
h
e
+
1
,
h
p
2
h
p
+
P
L
2
P
C
=
−
h
e
+
1
.
−
P
L
2
h
p
2
h
p
P
D
=
+
