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Title:: Strong Ground Motion Simulation of the Tangshan Earthquake Based on the Stochastic Finite Fault Method

作者:: 兰景岩¹; 2; 王延伟¹; 2; 刘娟²; 3; 齐文浩³; (1.北京工业大学,北京100022; 2.桂林理工大学,广西桂林541004; 3.中国地震局工程力学研究所,黑龙江哈尔滨 150080)

Author(s):: LAN Jingyan¹; 2; WANG Yanwei¹; 2; LIU Juan²; 3; QI Wenhao³; (1.Beijing university of technology,Beijing 100022,China)(2.Guilin University of technology,Guilin 541004,Guangxi,China)(3.Institute of Engineering Mechanics,China Earthquake Administration,Harbin 150080,Heilongjiang,China)

Keywords:: the Tangshan earthquake; strong ground motion; stochastic finite fault model

摘要:: 基于动力学拐角频率的随机有限断层模型,以1976年唐山大地震的极震区为研究目标,通过梳理前人的研究成果,建立了目标区的计算模型并确定了震源模型参数,依靠目标区的局部场地资料和场地动力学参数,利用四分之一波长法,获取局部场地放大效应参数; 利用随机有限断层模型地震动模拟方法,给出了唐山大地震近场强地震动场模拟结果,并与历史地震宏观烈度进行对比,结果表明:在Ⅷ、Ⅸ度影响烈度的范围与宏观资料吻合较好。

Abstract:: Based on the stochastic finite fault model of the dynamic corner frequency,we take the meizoseismal area of the Tangshan earthquake in 1976 as the research goal.The calculation model of the target zone is established and the parameters of the source model are determined by summarizing the research results of predecessors.The local site amplification is obtained by using the quarter-wavelength method based on the site condition data and soil dynamics parameters.The simulation results of the near-field strong ground motion field of the Tangshan earthquake are obtained by using the stochastic finite fault model ground motion simulation method.The results show that the ranges of VIII,IX degree simulated are similar to macro intensity comparing with the macroscopic intensity of historical earthquakes.