Civil Engineering Reference
In-Depth Information
Similar results could be found for the movements of the end column shown in
Fig. 6.14. It is therefore obvious that the effect of thermal movements on the
displacements of the rigid frame is far more pronounced for a structure restrained
by backfill soil then for a free structure.
The maximum retaining wall and end column moments from the previous three
analyses are presented in Fig. 6.10. The comparison reveals similar results for the
bending moments as for the displacement, where the moments developed in the
restrained frame structure are substantially larger than those found for the free
frame. However, while the bending moments developed in the retaining wall
differed quite notably with the two soil models for backfill, the corresponding
moments for the end column show close agreement for both backfill models.
Finally, the maximum lateral earth pressures found from the analysis using the
Mohr-Coulomb and Hardening Soil models are presented in Fig, 10.2 (reproduced
from Fig. 6.15). As shown in the figure, the maximum lateral earth pressure
exerted on the rigid frame developed during the thermal expansion cycles and is
36
Roof
U
h-No Backfill
U
h-MC Backfill
U
h-HSS Backfill
Level D
27
Level C
18
Level B
9
Level A
0
-0.05
0
0.05
0.1
0.15
Maximum Horizontal Retaining Wall Movement, U
h
, ft
Fig. 10.1
Maximum Horizontal Retaining Wall Movement of in Service Building
36
Roof
σ
'
MC-Backfill
σ
'
HSS-Backfill
σ
Level D
27
'
Active
σ
'
At Rest
Level C
18
Level B
9
Level A
0
0
0.5
1
1.5
2
2.5
3
'
h
, kips/ft
2
Max
σ
Fig. 10.2
Maximum Lateral Earth Pressure
