Civil Engineering Reference
In-Depth Information
The horizontal deflections of the end columns for the single and 3-bay frame
are found to undergo little change between the initial backfill stage and the last
expansion cycle.
40
35
30
U
hn1
U
hn3
U
hn6
U
hn10
U
hn15
U
hn20
25
20
L
b
= 10 ft
φ
15
= 30
o
10
S
c
/S
b
= 4
5
0
0
0.05
0.1
0.15
0.2
0.25
0.3
Horizontal End Column Movement, U
h
, ft
Fig. B.51
End Column Movements at Backfill Stage (
φ
= 30º, All Bays, L
b
= 10 ft, S
c
/S
b
= 4)
40
35
30
U
hen1
U
hen3
U
hen6
U
hen10
U
hen15
U
hen20
25
20
L
b
= 10 ft
φ
15
= 30
o
10
S
c
/S
b
= 4
5
0
0
0.05
0.1
0.15
0.2
0.25
0.3
Horizontal End Column Movement, U
h
, ft
Fig. B.52
End Column Movements at Expansion Cycle (
φ
= 30º, All Bays, L
b
= 10 ft, S
c
/S
b
= 4)
On the other hand, the horizontal deflections of the end column of the remain-
ing RFERS are found to increase relatively substantially due to temperature in-
crease. The end column of the 6-bay frame, for instance, is shown to have under-
gone an approximate increase of 45% at the end of the last expansion. The
horizontal deflection of the end column of the 20-bay frame, in contrast, is 4 times
larger at the end of the last expansion cycle than at the initial backfill stage.
The bending moment diagrams in the end column of the RFERS presented in
this group are shown in Fig. B.53 and B.54.
