一种城市地震动区划方法
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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。
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.
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.
引文
[1]廖振鹏.地震小区划—理论与实践[M].北京:地震出版社,1989.LIAO Zhenpeng.Seismic microzonation—theory and practice[M].Beijing:Seismic Press,1989.
[2]姚文斌.郑州市地震小区划概述[J].国际地震动态,1990,(6)(总138):14-17.YAO Wenbin.An outline of seismic microzonation in Zhengzhou city[J].Recent Developments in World Seismology,1990,(6)(138 for all):14-17.
[3]范士凯.地震小区划的工程地质地震工程准则及实例分析[J].资源环境与工程,2006,20(增刊):601-607.FAN Shikai.The engineering geological-seismic engineering criteria for classification of subareas of eathquake and case study[J].Resources Envi-ronment&Engineering,2006,20(s1):601-607.
[4]FEMA.NEHRP Recommanded Provisions for the Seismic Regulations for New Buildings[S].Berkeley:NCEER,1995.
[5]薄景山,翟庆生,刘红帅,等.场地分类及其在我国的演变[J].自然灾害学报,2004,13(2):44-49.BO Jingshan,ZHAI Qingsheng,LIU Hongshuai,et al.Site classification and its evolution in Chinese code for seismic design of buildings[J].Journalof Natural Disasters,2004,13(2):44-49.
[6]GB17741-2005工程场地地震安全性评价[S].GB17741-2005 Evaluation of Seismic Safety for Engineering Sites[S].
[7]崔良强,刘春峰.面向数字城市的3维GIS关键技术分析[J].测绘与空间地理信息,2010,33(4):146-149.CUI Liangqiang,LIU Chunfeng.Analysis of the key technologies of 3D GIS for digital city[J].Geomatics&Spatial Information Technology,2010,33(4):146-149.
[8]GB50011-2001建筑抗震设计规范[S].GB50011-2001 Chinese Code for Seismic Design of Buildings[S].
[2]姚文斌.郑州市地震小区划概述[J].国际地震动态,1990,(6)(总138):14-17.YAO Wenbin.An outline of seismic microzonation in Zhengzhou city[J].Recent Developments in World Seismology,1990,(6)(138 for all):14-17.
[3]范士凯.地震小区划的工程地质地震工程准则及实例分析[J].资源环境与工程,2006,20(增刊):601-607.FAN Shikai.The engineering geological-seismic engineering criteria for classification of subareas of eathquake and case study[J].Resources Envi-ronment&Engineering,2006,20(s1):601-607.
[4]FEMA.NEHRP Recommanded Provisions for the Seismic Regulations for New Buildings[S].Berkeley:NCEER,1995.
[5]薄景山,翟庆生,刘红帅,等.场地分类及其在我国的演变[J].自然灾害学报,2004,13(2):44-49.BO Jingshan,ZHAI Qingsheng,LIU Hongshuai,et al.Site classification and its evolution in Chinese code for seismic design of buildings[J].Journalof Natural Disasters,2004,13(2):44-49.
[6]GB17741-2005工程场地地震安全性评价[S].GB17741-2005 Evaluation of Seismic Safety for Engineering Sites[S].
[7]崔良强,刘春峰.面向数字城市的3维GIS关键技术分析[J].测绘与空间地理信息,2010,33(4):146-149.CUI Liangqiang,LIU Chunfeng.Analysis of the key technologies of 3D GIS for digital city[J].Geomatics&Spatial Information Technology,2010,33(4):146-149.
[8]GB50011-2001建筑抗震设计规范[S].GB50011-2001 Chinese Code for Seismic Design of Buildings[S].
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