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砂土液化变形的有限元-无网格耦合方法

Release Time:2019-03-10  Hits:

Indexed by: Journal Article

Date of Publication: 2010-08-10

Journal: 岩土力学

Included Journals: Scopus、CSCD、ISTIC、PKU、EI

Volume: 31

Issue: 8

Page Number: 2643-2647,2654

ISSN: 1000-7598

Key Words: 有限元;无网格法;耦合;伽辽金法

Abstract: 通过构造Biot固结理论u-p方程的无网格伽辽金-有限元耦合方法,对砂土液化变形问题进行了数值模拟.对于饱和砂土,采用Oka等提出的弹塑性本构模型,同时采用更新的Lagrange计算格式推导了控制方程.耦合方法能够发挥有限元和无网格各自的优点,既避免了由于单元变形扭曲而引起的计算中断,也可节约计算时间,算例验证了该方法在地震液化问题中的有效性.

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