Civil Engineering Reference
In-Depth Information
8.3.1.5 10-Bay Frame (Bay Length, L
b
, 10 Feet, Column to Beam Stiffness
Ratio, S
c
/S
b
, of 1)
The analysis results for a 10-bay frame with a bay length of 10-ft and a column to
beam stiffness ratio of 1 are presented herein.
Fig. 8.16 shows the retaining wall movements for the 10-bay frame. The
relatively lower frame stiffness is evident from the wall movements during the
expansion cycles, where while the frame length is the largest thus far, the frame
expansion into the soil is rather smaller than that for stiffer frames (see Appendix
A for additional configurations).
10
10 bays
8
L
b
= 10 ft
φ
U
ha
U
hec1
U
hcc1
U
hec2
U
h
cc2
U
hec3
= 30
o
6
S
c
/
S
b
= 1
4
2
0
-0.02
-0.01
0
0.01
0.02
0.03
0.04
Horizontal Retaining Wall Movement, U
h
, ft
Fig. 8.16
Retaining Wall Horizontal Movements (Ten-Bay, L
b
= 10 ft, S
c
/S
b
= 1)
The retaining wall bending moment diagram is shown in Fig. 8.17. The
magnitude of the maximum moment at about mid-height of the wall developed
during the last expansion cycle is found to be nearly 2.5 times larger than its
counterpart developed during the initial backfill stage.
The shear force diagram, also shown in Fig. 8.17, indicates that the maximum
shear force occurs in the wall during the latter expansion cycles with a magnitude
nearly 4 times larger than any other cycles.
The lateral earth pressure developed in the retained soil behind the rigid frame
is shown in Fig. 8.18.
