堤防抗震分析中黏-弹性人工边界的实现方法及其作用效果研究  

Implement Methods and Effects of Viscous-spring Artificial Boundary in Seismic Analysis of Embankments

作　　者：杨洋 黄德强[2] 

机构地区：[1]重庆市弘禹水利咨询有限公司,重庆401147 [2]中国水电顾问集团华东勘测设计研究院,浙江杭州310014

出　　处：《岩土工程技术》2014年第2期79-82,共4页Geotechnical Engineering Technique

基　　金：福建省自然科学基金计划项目(2008J0154);福建省科技三项费用资助项目(2006F0507010091)

摘　　要：结合福建省闽江下游一堤防工程,采用一种黏一弹性人工边界的简便实现方法,运用有限元非线性动力计算程序对该堤防在典型地震荷载作用下的响应情况进行计算和分析,讨论了不同边界条件下,堤防及地基动力响应特点。结果表明,在考虑地基的辐射阻尼时,堤防及地基的动力响应较传统的固定边界条件时有所减弱,所得计算结果与实际情况更为接近,数值模拟精度进一步提高。Combined with an embankment engineering on the downstream of Min River in Fujian province, a simple and convenient implementation method of viscous-spring artificial boundary, dynamic responses of the embankment by the nonlinear finite element program,and discussed the dynamic response characteristic of different boundary conditions. The results showed that, dynamic response of embankment and foundation were decelerated significantly when considering the foundation radiation damping effect of the traditional fixed boundary condition, and research demonstrated satisfactory coincidence between experi- mental results and these obtained by simulation described in this article. The course of computing is simplified and the precision has improvement in a certain extent.

关 键 词：堤防 抗震分析 黏弹性人工边界 动力响应 

分 类 号：P315.9[天文地球—地震学] TB115[天文地球—固体地球物理学]