Civil Engineering Reference
In-Depth Information
The figures indicate, that with the exception of the end column of the single bay
frame, all the end columns developed substantially larger moment magnitudes at
the end of the last expansion cycle compared to those found at the end of the ini-
tial backfill stage. The bending moment at the first level of the end column of the
6-bay frame, for instance, is found to increase nearly 3 times due to temperature
movements, while the bending moment of the end column of the 20-bay frame at
the first level increased by more than 2000%.
The analysis results for the frames with 20-ft-bay frames are omitted since
several unsuccessful numerical simulations lead to a reduced number of frames
analyzed.
40
L
b
= 10 ft
φ
35
M
bn1
M
bn3
M
bn6
M
bn10
M
bn15
M
bn20
= 30
o
30
25
S
c
/S
b
= 4
20
15
10
5
0
-20
0
20
40
60
80
100
120
140
End Column Moment, M, kips-ft
Fig. B.53
End Column Moment at Backfill Cycle (
φ
= 30º, All Bays, L
b
= 10 ft, S
c
/S
b
= 4)
40
L
b
= 10 ft
φ
35
M
en1
M
en3
M
en6
M
en10
M
en15
M
en20
= 30
o
30
25
S
c
/S
b
= 4
20
15
10
5
0
-20
0
20
40
60
80
100
120
140
End Column Moment, M, kips-ft
Fig. B.54
End Column Moment at Expansion Cycle (φ = 30º, All Bays, L
b
= 10 ft, S
c
/S
b
= 4)
