地基辐射阻尼对结构地震响应的影响  

Effect of radiation damping on seismic response of structures

作　　者：李志全[1,2] 杜成斌[1,2] 艾亿谋[2] 

机构地区：[1]中国水利水电科学研究院,北京100044 [2]河海大学土木工程学院,江苏南京210098

出　　处：《河海大学学报（自然科学版）》2009年第4期400-404,共5页Journal of Hohai University(Natural Sciences)

基　　金：国家重点基础研究发展计划(973计划)(2007CB714104);中国水利水电科学研究院开放研究基金(2008538613)

摘　　要：ABAQUS作为一种功能强大的工程分析模拟软件,在动力响应分析中具有很大优势.为此,将黏弹性边界单元与大型商业软件ABAQUS相耦合,利用ABAQUS实现对黏弹性边界的模拟,通过算例比较了结构在黏弹性边界、黏性边界和固定边界条件下的动力响应,并在考虑黏弹性边界影响的情况下,对一实际水闸-地基系统进行了地震响应分析.分析结果表明：黏弹性边界精度明显高于其他2种边界,可用于结构-土动力相互作用分析;辐射阻尼能够显著减小结构地震响应30%-40%.ABAQUS, a commercial analysis and simulation software with strong functions for projects, is a superior way to analyze dynamic response. ABAQUS was coupled with visco-elastic boundary elements to simulate visco-elastic boundaries. Through an example, the dynamic responses of structures with a visco-elastic boundary, a viscous boundary and a fixed boundary were compared. The seismic response of a sluice-foundation system was analyzed with consideration of the the effect of visco-elastic boundaries. The results show that the precision of the visco-elastic boundary is significantly higher than that of the other two boundaries, and it can be used to analyze the interaction between foundations and structures. Radiation damping can reduce the response of the structures by 30% - 40%.

关 键 词：结构 地基 地震响应 黏弹性边界 黏弹性边界单元 固定边界 ABAQUS 

分 类 号：TV312[水利工程—水工结构工程]