Civil Engineering Reference
In-Depth Information
The variation in the magnitude and distribution of earth pressure is found to be
large between the various temperature cycles. During the last expansion cycle, the
magnitude of the earth pressure at the top region of the wall is nearly 9 times
larger than during the initial backfill stage or contraction cycles.
10
10 bays
U
ha
U
hec1
U
h
c
c1
U
hec2
U
hcc2
U
hec3
8
L
b
= 10 ft
φ
= 30
o
6
S
c
/
S
b
=
1
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
Fig. 8.19
End Column Horizontal Movement (Ten-Bay, L
b
= 10 ft, S
c
/S
b
= 1)
The horizontal end column movements, shown in Fig. 8.19, indicate a relatively
large displacement during the expansion cycle. The maximum displacement
magnitude at the top of the end column during the expansion cycle is nearly 8
times larger than its counterpart found at the end of the initial backfill stage. The
end column bending moment diagram, shown in Fig. 8.20, indicate that the
maximum moment occurs at the top of the end column during the last expansion
cycle with a magnitude more than times larger than its counterpart developed at
the end of the initial backfill stage.
10
10 bays
8
L
b
= 10 ft
φ
M
a
M
ec1
M
c
c
1
M
ec2
M
cc2
M
ec3
= 30
o
6
S
c
/
S
b
= 1
4
2
0
-2
-1
0
1
2
3
4
5
End Column Moment, M, kips-ft
Fig. 8.20
End Column Bending Moment (Ten-Bay, L
b
= 10 ft, S
c
/S
b
= 1)
