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《Journal of Seismological Research》 2013-02
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Effect of Soft Soil Layer on Ground Motion Peak

CAO Jun-feng,TONG Yuan-lin,LI Guang,FENG Wei-dong,MENG Fan-yue, Zhao Peng,Dong Shuang-lin ( Earthquake Administration of Anhui Province,Hefei 230031,Anhui,China)  
Basing on a soft site in Jianghuai region,we constructed several analyze models of site soil seismic response. Then we selected three earthquake records of Taft (1952N21E) ,Kobe ( 1995EW ) and E1-Centro ( 1940NS ) as the input waves,and analyzed the effect of the buried depth and the thickness of soft soil layer on ground peak acceleration in frequency domain through one-dimension equivalent linear fluctuation method. The results showed that for the given input ground motion,the ground acceleration peak and soil amplification factors decreased gradually with the increase of thickness or buried depth of soft site. When the thickness or buried depth of soft site exceeded a certain value,the soft site began to show vibration reduction effect,the deeper and the thicker of the soft layer,the higher intensity of input ground motion,the vibration reduction effect is more obvious.
【Fund】: 安徽省地震科研青年基金项目(20120707)资助
【CateGory Index】: P315.9;TU435
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