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《Earthquake Engineering and Engineering Dynamics》 2018-02
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Comparison study of two methods to determine the equivalent shear wave velocity of topsoil

WANG Jing;QI Wenhao;BO Jingshan;JIANG Xiaohan;Key Laboratory of Earthquake Engineering and Engineering Vibration,Institute of Engineering Mechanics,China Earthquake Administration;Earthquake Science Department,Institute of Disaster Prevention;  
Equivalent shear wave velocity is one of the important parameters to determine the site category and further calculate the ground motion response spectrum. So detailed discuss the reliability of different equivalent methods has great meaning. After adjust the order of shear wave velocities of typical artificial sites and 274 actual engineering sites,we discussed the sensitivity of the travel time equivalent shear wave velocity(vse) and the period equivalent shear wave velocity(vs T) at different soil layer,respectively; and then compared their uniformity on site category with more than 200 sites. Scaling the shear wave velocities of each site model until vsereached the threshold values of site category,and calculated the vs Tof that site. The results show that,vs Tvaried but vsekeep steady when soil layer construction changed,it is mean vs Tis a more sensitive parameter to reflect the influence of soil layer construction on ground motion parameters. The site classification results of two methods have high consistency when application to the actual engineering sites,so it is reasonable and effective to adopt vs Tas the site classification index. The result of vs Tis larger than vse,vs Tshows normal distribution when vsereaches threshold values,so we can get their conversion value statistically.
【Fund】: 国家自然科学基金项目(51508096 51408559);; 中国地震局工程力学研究所基本科研业务费专项资助项目(2103C02)~~
【CateGory Index】: TU435
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