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  楼梦麟,陈培德.工程场地地震安评中加速度反应谱标准化问题的讨论[J].震灾防御技术,2012,7(2):121-129, DOI:10.11899/zzfy20120202.

工程场地地震安评中加速度反应谱标准化问题的讨论
摘要:    文中计算了不同地震输入模式下的拱桥地震反应,讨论了输入指定地震波进行时域计算结果和按对应的反应谱进行计算所得结果之间的差异,特别分析了分别按地震波的实际反应谱和经过标定的反应谱计算得到的拱桥地震反应之间的不同。数值结果表明:在工程场地地震安全性评价中,采用标准反应谱的方式所提供的场地地震加速度参数,将会抹杀土层场地动力特性对地表地震动的影响。因此,按此地震动参数进行结构反应计算时,有时会低估结构的地震反应,留下结构抗震不安全的隐患。
作者单位
楼梦麟 同济大学土木工程防灾国家重点实验室上海 20009 
陈培德 同济大学土木工程防灾国家重点实验室上海 20009 
关  键  词:反应谱  标准化谱  地震安评  工程场地
DOI:10.11899/zzfy20120202
基金项目:科技部国家重点实验室基础研究资助项目(项目编号:SLDRCE08-A-07);上海市科委基础研究重点项目(编号:07JC14051)
收稿日期:2012-01-19
作者简介:楼梦麟,男,生于1947年。博士,教授。主要研究方向:结构抗震防灾、土-结构动力相互作用、地震地面运动和环境振动分析。E-mail: lml@tongji.edu.cn
通讯作者:
Discussion on Problem of Acceleration Response Spectrum Standardization in Engineering Site Safety Evaluation
Abstract:      The seismic responses of an arch bridge are computed under the different excitation fashion. The difference between seismic responses obtained from time-domain analysis under the excitation of an assigned seismic wave and corresponding response spectrum analysis is discussed. Particularly, the difference between seismic responses obtained from different response spectrum, such as real spectrum of the input wave and its standardization spectrum is analyzed respectively. The numerical results show that if the ground seismic acceleration parameters are given by the standardization spectrum pattern in the seismic safety evaluation of engineering site, the influence of the dynamic characteristics of the soil site on the ground motion can be ignored. Therefore, the seismic responses of the structures will sometime be underestimated if these acceleration parameters are used for the structure seismic response analysis, as well as the hidden danger for structure safety will be left.
Keywords:  Response spectrum  Standardization spectrum  Seismic safety evaluation  Engineering site
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