Dynamic Behaviour of a Caisson Quaywall Under Strong Earthquake  

作　　者：Liu, HL Dai, HC Iai, S 

机构地区：[1]Hohai Univ, Geotech Engn Res Inst, Nanjing 210098, Peoples R China [2]China Yangtze Three Gorges Project Dev Corp, Yichang 443002, Peoples R China [3]Minist Transport, Port & Harbour Res Inst, Nagase 239, Japan

出　　处：《China Ocean Engineering》1999年第1期47-62,共16页中国海洋工程（英文版）

基　　金：National Natural Science Foundation of China

摘　　要：Effective stress analysis is performed to evaluate the residual displacement of a caisson quaywall during 1994 Hokkaido- Toho- Oki Earthquake and 1993 Kushiro- Oki Earthquake. The constitutive model used in this study is a multiple shear mechanism type defined in strain space and can take into account the effect of rotation of principal stress axis. The earthquake accelerations recorded at the outcropping rock during the earthquake are used as input bedrock motion. The results of finite element analysis are in good agreement with the observed behaviour of the quaywall. The analysis also indicates that liquefaction and high excess porewater pressure have a significant effect on the deformation of the caisson. Soil improvement is speculated as the most reliable measures against liquefaction. The influence of soil improvement and the reasonable improved area are discussed in the paper.Effective stress analysis is performed to evaluate the residual displacement of a caisson quaywall during 1994 Hokkaido- Toho- Oki Earthquake and 1993 Kushiro- Oki Earthquake. The constitutive model used in this study is a multiple shear mechanism type defined in strain space and can take into account the effect of rotation of principal stress axis. The earthquake accelerations recorded at the outcropping rock during the earthquake are used as input bedrock motion. The results of finite element analysis are in good agreement with the observed behaviour of the quaywall. The analysis also indicates that liquefaction and high excess porewater pressure have a significant effect on the deformation of the caisson. Soil improvement is speculated as the most reliable measures against liquefaction. The influence of soil improvement and the reasonable improved area are discussed in the paper.

关 键 词：caisson quaywall effective stress analysis lique faction residual deformation 

分 类 号：P315.9[天文地球—地震学]