Civil Engineering Reference
In-Depth Information
10
8
6
L
b
= 20 ft
φ
= 40
o
4
M
bn1
M
bn3
M
bn10
2
S
c
/S
b
= 1
0
-10
-5
0
5
10
End Column Moment, M, kips-ft
10
8
6
L
b
= 20 ft
φ
4
M
en1
M
en3
M
en10
= 40
o
2
S
c
/S
b
= 1
0
-10
-5
0
5
10
End Column Moment, M, kips-ft
Fig. A.51
End Column Moments (
φ
= 40º, All Bays, L
b
=20 ft, S
c
/S
b
= 1)
A.1.2.4 Frames with Bay Length, L
b
, 20 Feet, and Column to Beam Stiffness
Ratio, S
c
/S
b
, of 4
The horizontal movements of the retaining wall portion of the single story RFERS
with a bay length of 20 feet and column to beam stiffness ratio of 4 are presented
in Fig. A.52 for the initial backfill stage and the last expansion cycle.
The three frames of this series possess lateral stiffness substantially larger than
their counterparts presented latterly of smaller column to beam ratio, as indicated
in Table 7.2 of Chapter 7. The horizontal retaining wall movements vary with the
stiffness of the frames. During the backfill stage, for instance, the movements are
found to be relatively small. At the end of the expansion cycle, the 10-bay frame is
shown to undergo large expansion movements into the soil mass.
