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发表于 2004-9-14 21:17:38
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来自 大连理工大学
回复: 【讨论】基坑水平位移的形状
感谢斑竹回复.
我的计算模型是开挖七米深,土钉支护,分三排土钉,四步开挖.
土钉用cable,面层用liner.
我尝试改变初始应力,或者支护条件,基坑水平位移的形状还是中下部较大.命令流如下:
gen zone brick p1 10 0 0 p2 0 2 0 p3 0 0 10 size 10 2 20 rat 1 1 1
group soil
group excavation1 range x 0 2 y 0 2 z 8 10
group excavation2 range x 0 2 y 0 2 z 6 8
group excavation3 range x 0 2 y 0 2 z 4 6
group excavation4 range x 0 2 y 0 2 z 3 4
model elastic
prop bulk 1.25e7 shear 5.77e6
fix x range x -0.1 0.1
fix x range x 9.9 10.1
fix x z range z -0.1 0.1
fix y
set grav 0 0 -10
ini dens 2000
ini syy=-1e5 grad 0,0,1e4
ini sxx=-1e5 grad 0,0,1e4
ini szz=-2e5 grad 0,0,2e4
set small
solve
ini xdis=0 ydis=0 zdis=0
set large
model null range group excavation1
solve
sel cable id 1 beg 2.0,1,9 end 8.0,1,9 nseg 24
sel cable id 1 prop emod 2e11 ytens 2e8 xcarea 3.81e-4 &
gr_coh 2.5e4 gr_k 6.33e6 gr_per 0.346
sel liner id 1 range z=8.0,10.0 x=1.9,2.1
sel liner id 1 PROP iso=( 25e9, 0.15) thick=0.15 ; concrete
sel liner id 1 PROP cs_nk=8e8 cs_sk=8e8 &
cs_ncut=4e6 cs_scoh=4e6 cs_scohres=2e6 cs_sfric=20.0
solve
model null range group excavation2
solve
sel cable id 2 beg 2.0,1,7 end 8.0,1,7 nseg 24
sel cable id 2 prop emod 2e11 ytens 2e8 xcarea 3.81e-4 &
gr_coh 2.5e4 gr_k 6.33e6 gr_per 0.346
sel liner id 2 range z=6.0,8.0 x=1.9,2.1
sel liner id 2 PROP iso=( 25e9, 0.15) thick=0.15 ; concrete
sel liner id 2 PROP cs_nk=8e8 cs_sk=8e8 &
cs_ncut=4e6 cs_scoh=4e6 cs_scohres=2e6 cs_sfric=20.0
solve
model null range group excavation3
solve
sel cable id 3 beg 2.0,1,5 end 8.0,1,5 nseg 24
sel cable id 3 prop emod 2e11 ytens 2e8 xcarea 3.81e-4 &
gr_coh 2.5e4 gr_k 6.33e6 gr_per 0.346
sel liner id 3 range z=4.0,6.0 x=1.9,2.1
sel liner id 3 PROP iso=( 25e9, 0.15) thick=0.15 ; concrete
sel liner id 3 PROP cs_nk=8e8 cs_sk=8e8 &
cs_ncut=4e6 cs_scoh=4e6 cs_scohres=2e6 cs_sfric=20.0
solve
model null range group excavation4
sel liner id 4 range z=3.0,4.0 x=1.9,2.1
sel liner id 4 PROP iso=( 25e9, 0.15) thick=0.15 ; concrete
sel liner id 4 PROP cs_nk=8e8 cs_sk=8e8 &
cs_ncut=4e6 cs_scoh=4e6 cs_scohres=2e6 cs_sfric=20.0
solve
save sn-b15.sav |
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