Civil Engineering Reference
In-Depth Information
20
M
en1
M
en3
M
en10
15
10
L
b
= 20 ft
φ
= 30
o
5
S
c
/S
b
= 1
0
-15
-10
-5
0
5
10
15
End Column Moment, M, kips-ft
Fig. B.27
End Column Moment at Expansion Cycle (φ = 30º, All Bays, L
b
=2 ft, S
c
/S
b
= 1
B.1.1.4 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 two story RFERS
with a bay length of 20 feet and column to beam stiffness ratio of 4 are presented
in Fig. B.28 and B.29 for the initial backfill stage and the last expansion cycle.
The behavior of the retaining walls in this group of frames varies substantially
from their counterpart in the previous group of frames presented. The horizontal
wall movements are found to be substantially smaller at the backfill stage, and the
thermal expansion movements are more pronounced, especially for the 10-bay
frame.
20
15
10
L
b
= 20 ft
φ
U
hn1
U
hn3
U
hn10
= 30
o
5
S
c
/S
b
= 4
0
-0.05
0
0.05
0.1
0.15
Horizontal Retaining Wall Movement, U
h
, ft
Fig. B.28
Retaining Wall Movements at Backfill Stage (
φ
= 30º, All Bays, L
b
=20 ft, S
c
/S
b
= 4)
