Prediction Method of Seismic Residual Deformation of Caisson Quay Wall in Liquefied Foundation  

作　　者：王丽艳 刘汉龙 姜朋明 陈香香 

机构地区：[1]School of Civil engineering and architecture,Jiangsu University of science and technology [2]Geotechnical Research Institute,Hohai University [3]Design and research company of hydraulic exploration survey of Jiangsu

出　　处：《China Ocean Engineering》2011年第1期45-58,共14页中国海洋工程（英文版）

基　　金：supported by the Research Foundation of Jiangsu University of Science and Technology for Introducing Talents(Grant No. 35280901)

摘　　要：The multi-spring shear mechanism plastic model in this paper is defined in strain space to simulate pore pressure generation and development in sands under cyclic loading and undrained conditions, and the rotation of principal stresses can also be simulated by the model with cyclic behavior of anisotropic consolidated sands. Seismic residual deformations of typical caisson quay walls under different engineering situations are analyzed in detail by the plastic model, and then an index of liquefaction extent is applied to describe the regularity of seismic residual deformation of caisson quay wall top under different engineering situations. Some correlated prediction formulas are derived from the results of regression analysis between seismic residual deformation of quay wall top and extent of liquefaction in the relative safety backfill sand site. Finally, the rationality and the reliability of the prediction methods are validated by test results of a 120 g-centrifuge shaking table, and the comparisons show that some reliable seismic residual deformation of caisson quay can be predicted by appropriate prediction formulas and appropriate index of liquefaction extent.The multi-spring shear mechanism plastic model in this paper is defined in strain space to simulate pore pressure generation and development in sands under cyclic loading and undrained conditions, and the rotation of principal stresses can also be simulated by the model with cyclic behavior of anisotropic consolidated sands. Seismic residual deformations of typical caisson quay walls under different engineering situations are analyzed in detail by the plastic model, and then an index of liquefaction extent is applied to describe the regularity of seismic residual deformation of caisson quay wall top under different engineering situations. Some correlated prediction formulas are derived from the results of regression analysis between seismic residual deformation of quay wall top and extent of liquefaction in the relative safety backfill sand site. Finally, the rationality and the reliability of the prediction methods are validated by test results of a 120 g-centrifuge shaking table, and the comparisons show that some reliable seismic residual deformation of caisson quay can be predicted by appropriate prediction formulas and appropriate index of liquefaction extent.

关 键 词：caisson quay liquefied foundation seismic residual deformation extent of liquefaction regression analysis prediction formulas 

分 类 号：P315.9[天文地球—地震学]