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《Journal of Seismological Research》 2009-02
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Study on Attenuation Law of Evolutionary Power Spectra Parameter

ZHONG Ju-fang1,2,HU Xiao2(1.College of Civil Engineering,Nanchang Hangkong university,Nanchang,330063,Jiangxi,China)(2.China Institute of water Resources and Hydropower Research,beijing,100044,China)  
Based on the rock surface strong motion dataset in west America and Kameda's multifilter technique,the evolutionary power spectra of horizontal and vertical ground motion are calculated.The evolutionary power spectra parameters of every ground motion are achieved by the nonlinear least square method.The attenuation laws of the evolutionary power spectra parameters with earthquake magnitude,hypocentral distance and frequency are analyzed by experiential statistical method,and the attenuation models of the evolutionary power spectra parameters are developed.The coefficients of the attenuation models are also achieved by consistent weighted least square method for multi-random-variables.The rationality of these attenuation models are approved by compared with other's attenuation models.
【Fund】: 国家自然科学重大水利水电工程地震动参数研究(50679084);; 科技部课题:近海风电场基础设计方法(2006BAA01A24-1-2);; 博士后科学基金资助项目:“多点多维非平稳地震加速度时程合成方法研究”(20080430447);; 江西省教育厅科技项目:水库大坝地震灾害分析(GJJ08225);; 南昌航空大学人事处博士科研启动经费资助项目:重大工程设定地震研究(EA200711090)联合资助
【CateGory Index】: P315.9
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