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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。
Prediction of the earthquake residual deformation of the harbor terminal project in liquefied ground is an important link in the safety design of seismic engineering. The development level of excess pore water pressure caused by seismic action behind the pier has an important impact on the seismic deformation of the wharf. Referencing the liquefaction index to measure the variation characteristics of the excess pore water pressure, the method of calculating the residual deformation of the quake with rotational and sliding motion is called quasi-dynamic method. By applying the two models of 1g-shaking table test and 120g-centrifugal shaking table test, The test results verify the rationality and reliability of the quasi-motive force theory method for calculating the residual deformation of quay. The calculated results show that when the input acceleration of ground motions used in the calculation is the same as that of the test, the predictions of the displacement and residual deformation are in good agreement with the test values, indicating that for the uniformly fluctuating earthquake load, this method Predicted earthquake residual deformation is more ideal.