SH波作用下粘弹性半空间场地土地震反应分析  

Seismic Response Analysis of Visco-elastic Half-space Soil Layer under SH Wave Excitation

作　　者：李刚[1] 段林[1] 尚守平[1] 熊益农[1] 黄均田[1] 

机构地区：[1]湖南大学土木工程学院,湖南长沙410082

出　　处：《工程抗震与加固改造》2007年第2期37-40,共4页Earthquake Resistant Engineering and Retrofitting

摘　　要：本文考虑稳态简谐SH波激励下的谐和振动和场地土的材料阻尼,建立弹性动力反平面应变模型,采用一维粘弹性波动理论进行土层地震反应分析,得出基岩运动输入下半空间上覆粘弹性场地土体系的解析解。利用此解来分析SH波激励下粘弹性场地土动力效应,讨论不同场地土的动力特性参数对粘弹性场地土动力效应的影响。土-结构物动力相互作用和材料阻尼对场地土地震反应有很明显的影响,这为工程中的地震场地效应评价、震害分析和结构抗震设计都提供一定的参考依据。Considering harmonic vibration induced by steady-state harmonic SH wave and material damping of soil, establishing elastic dynamic anti-plane strain model, using the unidimensional viscoelastic wave theories, seismic response analysis of overlying viscoelastic soil layer under SH wave excitation is mostly presented in this paper. The analytic solution of overlying viscoelastic half-space soil layer under bedrock motion import can be solved, which can be used to analyze dynamic effect of viscoelastic soil under SH wave excitation and discuss different dynamic characteristic＇s influence on soil dynamics effect. Soil-structure dynamic interaction and material damping have obvious impact on seismic response of soil. These results provide some references for further preceding the appraisal of earthquake site effect, earthquake damage analyses and structure seismic designs in the project.

关 键 词：地震反应 土-结构动力相互作用 SH波 材料阻尼 动力效应 

分 类 号：TU311.3[建筑科学—结构工程]