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本文从我国现行抗震规范和烈度区划的实际情况出发按不同震中距将烈度7度分为三种情况,8度分为两种情况。根据强震观测资料统计得到的以上五种情况和9度的基岩运动作为输入,对实际工程中可能遇到的各种土层剖面进行了地震反应分折。根据所得结果讨论了烈度、震中距和场地条件的各种可能的组合对地表加速度反应谱的影响,提出了设计反应谱按烈度、震中距和场地条件分类的新方案。
Based on the actual situation of the current seismic code and intensity zonation in our country, this paper divides the intensities of 7 degrees into three cases according to the different epicentral distances, and the eight degrees are divided into two cases. Based on the above five cases and the bedrock movement of 9 degrees obtained from the strong earthquake observation data, the seismic response of various soil profiles encountered in the actual project is analyzed. Based on the results obtained, the effects of various possible combinations of intensity, epicentral distance and site conditions on the surface acceleration response spectrum are discussed. A new scheme for designing the response spectrum according to the intensity, epicenter distance and site conditions is proposed.