Three dimensional analysis on lateral displacement of liquefied subsoil
Three dimensional analysis on lateral displacement of liquefied subsoil
复制标题
液化地基横向位移三维分析
DOI：
10.3208/sandf.38.4_1
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发表时间：
1998
影响因子：
3.7
通讯作者：
I. Towhata
中科院分区：
文献类型：
--
作者：
Rolando P Orense;I. Towhata
提出了一种分析方法，可以预测地震液化引起的永久位移/变形。由于地形对位移的影响是重要的，一个三维的分析，可以充分考虑地形。此外，还考虑了地表未液化地壳在拉应力作用下的阻力损失。沿垂直轴沿着的侧向位移的经验插值有助于减少计算量。因此，开发了相当于三维计算的有限元二维分析。所提出的方法得到的位移是最大可能，以尽量减少潜在的能量的地基。通过计算位移与观测位移的比较，预测位移在一定程度上大于观测位移。因此，在时域中的动态分析，这也是由作者开发的，是必要的预测和观测之间的更好的匹配。与此相反，位移的方向是正确的预测本分析。
An analytical measure was developed so that the permanent displacement/deformation caused by seismic subsoil liquefaction can be predicted. Since the effects of topography on displacement is important, a three-dimensional analysis was developed which can fully consider the topography. Moreover, the loss of resistance in the surface unliquefied crust undergoing a tensile stress was taken into account. The empirical interpolation of the lateral displacement along the vertical axis helped reduce the amount of computation. Consequently, a finite-element two-dimensional analysis which is equivalent to a three-dimensional calculation was developed. The displacement obtained by the proposed method is the maximum possible to minimize the potential energy of the subsoil. By comparing the calculated displacement with the observation, the predicted displacement was to some extent greater than the observation. Hence, a dynamic analysis in the time domain, which was also developed by the authors, is necessary for a better matching between prediction and observation. In contrast, the direction of displacement was correctly predicted by the present analysis.