Study on method of earthquake input and artificial boundary conditions for seismic soil-structure interaction analysis

QIU Liu-chao1; JIN Feng2

doi:10.16285/j.rsm.2006.09.013

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Study on method of earthquake input and artificial boundary conditions for seismic soil-structure interaction analysis

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- Study on method of earthquake input and artificial boundary conditions for seismic soil-structure interaction analysis
- Issue 9, Pages: 1501-1504(2006)
- 作者机构：
  
  1. 中国农业大学应用力学系
  2. 清华大学水利水电工程系
- 作者简介：
- 基金信息：
- DOI：10.16285/j.rsm.2006.09.013
  CLC： TU435
- Published：2006
- 稿件说明：
移动端阅览
[1]邱流潮,金峰.地震分析中人工边界处理与地震动输入方法研究[J].岩土力学,2006(09):1501-1504.

QIU Liu-chao1, JIN Feng2. Study on method of earthquake input and artificial boundary conditions for seismic soil-structure interaction analysis[J]. 2006, (9): 1501-1504.
[1]邱流潮,金峰.地震分析中人工边界处理与地震动输入方法研究[J].岩土力学,2006(09):1501-1504. DOI： 10.16285/j.rsm.2006.09.013.

QIU Liu-chao1, JIN Feng2. Study on method of earthquake input and artificial boundary conditions for seismic soil-structure interaction analysis[J]. 2006, (9): 1501-1504. DOI： 10.16285/j.rsm.2006.09.013.

摘要

基于柱面波波动方程

推导建立了适用于土-结构地震动力相互作用分析的地震动输入和人工边界的处理方法。其中

地震动的输入是通过在人工边界上施加等效节点力来实现的

等效节点力的大小与入射地震波波速成正比;而人工边界的处理方法使得人工边界条件不仅在时间上是局部的

而且在空间上也是局部的。这种处理方法简单、有效

物理意义清晰

且很容易在有限元法中实现

结合Newmark时间积分是无条件稳定的。为了验证方法的有效性和精度

给出了两个算例

分别用于检验人工边界条件的性能以及地震动输入方法的正确性。算例分析结果表明

所提出的方法是十分有效的。

Abstract

Based on the cylindrical wave equation

a method of earthquake input and artificial boundary for seismic soil–structure interaction analysis is presented. The artificial boundary condition is local in both time and space and the earthquake input is implemented at the base of the finite computational domain through a set of nodal equivalent forces

which is proportional to the velocity of the incident seismic wave. The proposed method is simple but efficient; and it can be implemented in finite element method without difficulty. Moreover

the time-stepping algorithm based on Newmark’s method in conjunction with this method is unconditionally stable. Two Numerical examples were conducted to verify the validity and accuracy of the method.

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