Civil Engineering Reference
In-Depth Information
The end column horizontal movements are shown in Fig. 9.34 and 9.35. The
horizontal deflection of the end column of the 3-bay frame at the end of the last
expansion cycle is shown to be nearly 10% larger than its counterpart found at the
end of the initial backfill stage, while the deflection of the end column of the 10-
bay frame is found to be approximately 4 times larger, and even comparable to the
deflection of the end column of the 3-bay frame.
These results denote a complexity in the prediction of the lateral deflection of
the free end of the RFERS due to thermal movements, given that two frames with
substantially different lateral stiffness and expansion length were to assume nearly
the same laterally deflected position.
30
25
20
15
L
b
= 20 ft
φ
U
hn3
U
hn10
10
= 30
o
5
S
c
/S
b
= 4
0
0
0.05
0.1
0.15
0.2
Horizontal End Column Movement, U
h
, ft
Fig. 9.34
End Column Movements at Backfill Stage (
φ
= 30º, All Bays, L
b
= 20 ft,
S
c
/S
b
= 4)
30
25
20
15
L
b
= 20 ft
φ
U
hen3
U
hen10
10
= 30
o
5
S
c
/S
b
= 4
0
0
0.05
0.1
0.15
0.2
Horizontal End Column Movement, U
h
, ft
Fig. 9.35
End Column Movements at Expansion Cycle (φ = 30º, All Bays, L
b
= 20 ft,
S
c
/S
b
= 4)
