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本文是在研究区域及其邻近地区的活动断裂特征、地震背景,场地地震危险性及其基本工程地质条件的基础上利用土的非线性地震反应程序对场地作了局部土层的地震动反应分析。在本次研究中土在地震荷载下的应力应变关系是用埃万(Iwan)模型模拟的,并用显示差分法求解。对场地内饱和轻亚粘土的液化可能性作出了判定。根据动力反应计算结果,对场区进行了地震影响小区划,最终提出了场地设计谱。
In this paper, based on the characteristics of active faults, seismic background, site seismic hazards and basic engineering geological conditions in the study area and its adjacent areas, a nonlinear seismic response program of soil was used to analyze the ground motion of local soil. . In this study, the stress-strain relationship of the soil under seismic loading was simulated using the Iwan model and solved using the show difference method. The liquefaction potential of saturated light sub-clay within the site was determined. Based on the results of dynamic response calculations, an earthquake-affected community plan was conducted on the site area, and finally a site design spectrum was proposed.