Geoscience Reference
In-Depth Information
(i)
(i)
Dense Sand
Loose Sand
∆y=218cm
y = 191cm
Free Field
Free Field
building
building
0
0
h/H=1%
h/H=2%
h/H=3%
h/H=4%
h/H=5%
h/H = 1%
h/H = 2%
h/H=3%
0.5
0.5
1
1
h/H=4%
h/H=5%
1.5
1.5
free-field
2
2
(ii)
(ii)
2.5
2.5
0
5
10
15
20
25
30
0
5
10
15
20
25
30
building
building
0
0
50
50
h/H=0%
100
h/H=0%
100
h/H=5%
150
150
h/H=5%
(iii)
(iii)
200
200
0
5
10
15
20
25
30
0
5
10
15
20
25
30
80
80
building
building
60
60
40
40
free-field
20
20
0
0
20
20
(iv)
(iv)
40
40
0
5
10
15
20
25
30
0
5
10
15
20
25
30
Distance (m)
Distance (m)
Fig. 9.4. FR-SFSI analysis of 2-storey, B
20m building, witha 1.3mthickslab
foundation. Fault rupture inthe free-fieldat s
=
10m: (i) deformed mesh
and plasticstrain,(ii)vertical displacement at the surface, (iii)contact pressure p, and
(iv) distortionangle
=
. The resultsof the FR-SFSI analysis (redlines) arecompared
withthe free-field results(blue lines)for h
β
/
H
=
1to5%.results
beneficial. However, the differential settlement and (rigid-body) rotation of the founda-
tionis three-timehigher on theloose sand.
(2) For the fault emerging (without SFSI) in the middle of the foundation (S
=
10m,
or S
/
B
=
0
.
50) the rupture path is diverted, becomes very diffuse, and bifurcates
forh
/
H
=
5%.Theleftbranch(whichisasecondaryone)divertsbyabout3 to4m
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