【摘要】 文中从场地划分入手,提出了一种城市地震动参数区划方法新思路:即首先利用专业软件Surfer和ArcGis对区域内的钻孔资料进行处理,构建包含土层厚度、波速分布和建筑场地分类等信息的三维地下模型,并对地表进行场地分区和网格划分。然后在每一场地分区内,选取若干个典型钻孔,进行一维土层地震响应分析,计算结果代表该类场地的地震反应,再根据区域内所有离散点(网格点)的信息,即可获得整个计算区域的地表地震反应结果,进而得到整个区域的地震动参数区划,以及不同加速度峰值的等值线。这一方法可用于计算不同强度地震输入下,区域内地震动的分布,其结果可用于城市震害预测,特别是震后快速评估。更多还原

【Abstract】 Started with site classification,a new method for urban seismic parameter,zonation is proposed.First the bore-hole data are processed with software Surfer and ArcGis,then 3D underground model which contains the information of soil layer thickness,wave speed distribution and site classification is established,in addition,the site is divided into subareas and grids.Afterwards,several representative tested holes in each subarea are selected for conducting the earthquake response analysis of one-dimensional soil layer,the results can be regarded as earthquake response in the corresponding subarea,and according to the information of all discrete points(grid points),the result of ground surface seismic response can be gained,and then the seismic parameter zonation and seismic acceleration isolines of the whole area can be got.This method can be used to getting seismic activity distribution under different intensity earthquake waves,the results can be used to urban seismic damage prediction,especially to swift damage evaluation after earthquakes.更多还原