SITE CLASSIFICATION FOR CHINESE STRONG-MOTION STATIONS USING SPECTRAL RATIO METHOD
WEN Ruizhi，JI Kun，REN Yefei，WANG Hongwei
(Key Laboratory of Earthquake Engineering and Engineering Vibration，Institute of Engineering Mechanics，China Earthquake Administration，Harbin 150080，China)
Abstract：Some site condition of Chinese strong-motion stations is still unknown，which greatly restricts the effective application of strong-motion records. We proposed a site classification scheme based on strong-motion data from Japanese KiK-net stations according to Chinese Code for Seismic Design of Building(GB50011-2010)，and calculated the Chinese mean site classification curves using the spectral ratio method from 279 stations of KiK-net. Then an empirical method for Chinese site classification was proposed based on the range of predominant period，peak value of spectral ratio and the spectral shape. Compared with the borehole information of stations in Chinese Sichuan Province，the classified result shows that this method is independent of different regions. Finally，we were able to classify Chinese 113 strong-motion stations from the records during 2007 to 2011.
2015, Vol. 34 
