Civil Engineering Reference
In-Depth Information
The lateral earth pressure developed behind the structure is shown in Fig. 8.36
for the various analysis cycles. The distribution of the pressure during the last
expansion cycle is similar for other frames presented earlier. The magnitude of the
maximum earth pressure, however, developed behind this 20-bay frame is the
largest found thus far.
10
8
6
20 bays
L
b
= 10 ft
φ
4
σ
'
a
σ
'
ec2
σ
'
ec1
σ
'
cc2
= 30
o
S
c
/S
b
= 4
2
σ
'
cc1
σ
'
ec3
0
0
0.2
0.4
0.6
0.8
1
1.2
'
h
, kips/ft
2
σ
Fig. 8.36
Retaining Wall Earth Pressure (Twenty-Bay, L
b
=10 ft, S
c
/S
b
= 4)
10
8
U
ha
U
hec1
U
hcc1
U
hec2
U
hcc2
U
hec3
20 bays
6
L
b
= 10 ft
φ
= 30
o
4
S
c
/S
b
= 4
2
0
-0.03
-0.02
-0.01
0
0.01
0.02
0.03
0.04
0.05
Horizontal End Column Movement, U
h
, ft
10
8
M
a
M
ec1
M
cc1
M
ec2
M
cc2
M
ec3
20 bays
6
L
b
= 10 ft
φ
4
= 30
o
2
S
c
/S
b
= 4
0
-40
-30
-20
-10
0
10
20
30
40
End Column Moment, M, kips-ft
Fig. 8.37
End Column Analysis Results (Twenty-Bay, L
b
=10 ft, S
c
/S
b
= 4)
