深厚覆盖软土地层多向地震动力反应分析

在彈塑性邊界面模型的基礎上 ,通過試驗 ,研究了上海地區典型粘土和砂性土的動力特性 ,取得了針對邊界面模型的計算參數 ,并采用多向地震作用下的水平地層彈塑性動力反應分析程序 (SUMDES)對以深厚軟土覆蓋地層為特點的上海地區典型的土層斷面 ,以蘇南核電站為主的地震輸入進行了場地反應分析 ,在加速度特性、孔壓特性和動應力特性等方面取得了相應的結果 .針對上海地區厚覆蓋土層 ,對不同土層厚度作了對比研究 ,進行了相應的分析比較 ,并得出了有意義的結論 .還采用多向地震作為輸入 ,分析了多向地震的反應. Based on the plasto -elastic bounding surface model, the dynamic characters of typical clay and silt were studied through several types of laboratory dynamic tests .The parameters of dynamic bounding surface model were given upon the tests .By using a nonlinear procedure for response analysis of horizontally layered sites subjected to multi -directional earthquake loading, the response of acceleration, pore pressure and dynamic stress in Shanghai area under different earthquakes were studied .According to the characters of thick cover soil layer in Shanghai area, different depths of earthquake input were calculated .And dynamic responses of the multi -directional earthquake input were studied .