Civil Engineering Reference
In-Depth Information
end of the expansion cycle substantially larger than their counterparts found at the
backfill stage. The end column of the 20-bay frame is found to have a bending
moment developed at the first level at the end of the expansion cycle nearly 40
times larger than the moment developed at the initial backfill stage.
20
L
b
= 10 ft
φ
M
bn1
M
bn3
M
bn6
M
bn10
M
bn15
M
bn20
= 30
o
15
S
c
/S
b
= 4
10
5
0
-10
0
10
20
30
40
50
End Column Moment, M, kips-ft
Fig. B.17
End Column Moment at Expansion Cycle (φ = 30º, All Bays, L
b
=10 ft, S
c
/S
b
= 4)
20
M
en1
M
en3
M
en6
M
en10
M
en15
M
en20
15
10
L
b
= 10 ft
φ
= 30
o
5
S
c
/S
b
= 4
0
-10
0
10
20
30
40
50
End Column Moment, M, kips-ft
Fig. B.18
End Column Moment at Expansion Cycle (
φ
= 30º, All Bays, L
b
=10 ft, S
c
/S
b
= 4)
B.1.1.3 Frames with Bay Length, L
b
, 20 Feet, and Column to Beam Stiffness
Ratio, S
c
/S
b
, of 1
The horizontal movements of the retaining wall portion of the two story RFERS
with a bay length of 20 feet and column to beam stiffness ratio of 1 are presented
in Fig. B.19 and B.20 for the initial backfill stage and the last expansion cycle
The horizontal retaining wall movements for this group of frames are found to
be generally larger than their counterpart presented earlier. The horizontal position
of the wall for all three frames presented herein is similar in the two figures shown
below, with a small change in horizontal movement found at the end of the last
expansion cycle away from the retained soil mass.
