Geoscience Reference
In-Depth Information
0.2
0.1
0
N = 1000 kN
N = 3000 kN
−
0.1
−
0.2
0.2
0
−
0.2
−
0.4
−
0.6
0.4
0.2
0
−
0.2
−
0.4
0
4
8
12
16
t [sec]
Fig. 9.16. Time-histories of thestructure and foundation response under earthquake
loading. The outcropping excitation is along duration Ricker pulse
(
T
E
=
2
.
2s
,
PGA
=
0
.
20g
)
resultofstronglyinelasticsoilbehaviourasthebearingcapacityfailuremechanisms
(leftand right)are fully“activated” inthis case.
•
The moment-settlement curves (M-w) reflect the above M-
response, with the
curve of the light-weight case showing the smallest deviation from the monotonic
curve, and of the heavy weight thelargest.
θ
•
From a design perspective, soil-foundation-structure interaction (SFSI) plays a
beneficial role in reducing the acceleration A
CM
at the centre of mass of the super-
structure. This reduction is much greater in the heavy-load case, as result of signifi-
cant soil inelasticity induced bythe rocking foundation (“inertial” nonlinearities).