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Title:: Study on the Effect of Trapezoidal Valley Site on Adjustment Method of Response Spectrum Platform Value Based on OpenSees

作者:: 李平¹; 2; 张宇东²; 李巨文²; 辜俊儒²; 朱胜²; 李玉影²; (1.东北林业大学工程咨询设计研究院,黑龙江哈尔滨 150040; 2.防灾科技学院地质工程学院,河北三河 065201)

Author(s):: LI Ping¹; 2; ZHANG Yudong²; LI Juwen²; GU Junru²; ZHU Sheng²; LI Yuying²; (1.School of Engineering Consulting& Design,Northeast Forestry University,Harbin 150040,Heilongjiang,China)(2.Department of Geological Engineering,Institute of Disaster Prevention,Sanhe 065201,Hebei,China)

Keywords:: OpensSees; river valley site; ground motion; response spectrum; aseismic design

摘要:: 以梯形河谷场地为研究对象,采用OpenSees 有限元程序对深厚河谷场地进行了数值模拟,研究不同河谷坡角、深宽比、覆盖层厚度对地表地震动反应谱的影响程度,得到了其地震动规律。结果表明:坡角、深宽比对反应谱的特征周期影响不显著,但对反应谱的平台值影响显著; 通过数学统计方法给出了地表地震动反应谱平台值修正系数表。

Abstract:: Taking trapezoidal valley site as the research object,the OpenSees finite element program which is used widely in earthquake engineering was adopted for simulating the deep valley sites,then the influences of different valley slope angle,depth-to-width ratio,overburden thickness on the surface ground motion response spectra were explored,furthermore the corresponding laws of ground motion about the sites were captured.The results show that the slope angle and depth-to-width ratio have no significant influence on the characteristic period of the response spectrum,but have significant influence on the platform value of the response spectrum.The Tab.of correction coefficient of the platform value of ground motion response spectrum is given by mathematical statistical method.