土层动力参数变化对地表地震反应影响的研究

摘要

通过模拟土层剖面,采用等效线性化程序,对土体的非线性动力参数～动剪切模量比与阻尼比分别使用实测值、行业推荐值和规范值来计算地表的反应谱,比较地表的地震动峰值与反应谱的特征周期大小以及反应谱的形状,以评价土层参数变化对地表地震反应的影响.%Through the simulation of soil profile and the equivalent linearization procedure,the surface seismic response spectrum was calculated by using the measured value,industry recommended value and standard value of the soil nonlinear dynamic parameter,dynamic shear modulus ratio and damping ratio,respectively.We compare the peak of surface ground motion,the characteristics cycle size of response spectrum and the shape of the response spectrum,in order to evaluate the effect of soil dynamic parameter on surface seismic response.