Seismic Response Analysis of Liquefiable Sandy Ground Considering Inherent Anisotropy’s Influence
Seismic Response Analysis of Liquefiable Sandy Ground Considering Inherent Anisotropy’s Influence
复制标题
考虑固有各向异性影响的可液化沙地地震反应分析
DOI：
10.1007/978-3-030-64518-2_83
复制
发表时间：
2021
期刊：
影响因子：
--
通讯作者：
Sugiura Yoko
中科院分区：
文献类型：
--
作者：
Ueda Kyohei;Hyodo Junichi;Sato Kyohei;Sugiura Yoko
考虑固有的各向异性对于更好地了解颗粒材料的行为至关重要。其中一位作者通过动态离心模型测试研究了固有各向异性对地面地震行为的影响，并发现以较高角度沉积的沙质地面更容易液化。本文针对考虑固有各向异性的可液化砂地基进行了地震响应分析，并与试验结果进行了比较。为了对沙地进行建模，使用了应变空间多机制模型；通过引入三个各向异性参数（a1、a2 和 θo），该模型已扩展用于描述与固有各向异性相关的沙子行为。不考虑渗透率各向异性的地震响应分析表明，即使采用附加的各向异性参数，也很难在实验中准确模拟沉积角依赖性。这项研究表明，需要考虑各向异性渗透率（可能取决于沉积角度）以及额外的三个参数，以正确捕获与固有各向异性相关的沙地液化行为。
Consideration of inherent anisotropy is crucial to gaining an improved understanding of the behavior of granular materials. One of the authors examined inherent anisotropy’s effect on the seismic behavior of ground through dynamic centrifuge model tests and revealed that a sandy level ground deposited at a higher angle is more susceptible to liquefaction. In the present paper, seismic response analyses are performed on the liquefiable sandy ground considering inherent anisotropy and their results are compared with the experiment. For modeling the sandy ground, a strain space multiple mechanism model is used; the model has been expanded for describing sand behavior associated with inherent anisotropy, by introducing three anisotropic parameters (a1,a2, andθo). The seismic response analyses with no consideration for permeability anisotropy show that it is difficult to accurately simulate the deposition angle dependency in the experiment, even though the additional anisotropic parameters are employed. This study demonstrates that considering anisotropic permeability, which may depend on the deposition angle, is required as well as the additional three parameters for properly capturing the liquefaction behavior of sandy ground associated with inherent anisotropy.
DOI：
10.1002/nag.899
发表时间：
2011-02
影响因子：
4
作者：
S. Iai;T. Tobita;O. Ozutsumi;K. Ueda
通讯作者：
S. Iai;T. Tobita;O. Ozutsumi;K. Ueda