【摘要】 液化地基中海港码头工程的地震残余变形的预测是地震工程安全设计中重要的环节,码头身后回填砂土因地震作用引起的超静孔隙水压力发展水平对码头地震变形有着重要的影响。引用液化度指标衡量超静孔隙水压力的变化特征,计算码头作旋转和滑动运动的地震残余变形的方法称为拟动力法,通过应用1g-振动台试验与120g-离心振动台试验的两模型测试结果验证计算码头地震残余变形的拟动力理论方法的合理性与可靠性。计算结果表明当计算中采用的地震动输入加速度与试验相同时,预测出的位移变化规律以及残余变形的计算值与测试值规律具有较好的一致性,表明对于均匀波动的地震载荷,该方法预测的地震残余变形较理想。更多还原

【Abstract】 Predicting the seismic residual deformation of a quay wall induced by earthquake load is important in seismic safety design.The seismic deformation of a quay wall is significantly influenced by the development of excess pore water pressure in the backfill sand behind the quay wall.In a previous study,a pseudo-dynamic method for calculating the seismic residual deformation was provided,in which the index of liquefaction extent was applied to consider the effect of excess pore water pressure in the backfill soil for the motion of gravity quay wall during earthquake.The rationality and the reliability of the prediction method are validated by a 1g-shaking table model test results and a 120g-centrifuge shaking table model test.The results show consistency between the calculation values and the test values,indicating that the method is rational for calculation of the seismic residual deformation of quay walls.更多还原