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基于Biot动力耦合理论,采用一个经过广泛验证的砂土循环弹塑性本构模型,建立了平面应变条件下土堤地基的地震液化数值模拟方法。以某河流堤防的实际工程为例,应用该方法对土堤地基的地震液化进行了数值模拟,并对地震作用下的超孔隙水压力、加速度、位移等动力反应进行了计算分析,得到了一些对于抗震分析有用的结果。
Based on the Biot dynamic coupling theory, a widely validated elasto-plastic constitutive model of sand circulation is established to simulate the seismic liquefaction of embankment under plane strain. Taking the actual embankment project of a river as an example, this method is used to simulate the seismic liquefaction of embankment foundation. The dynamic responses of excess pore water pressure, acceleration and displacement under earthquake are calculated and analyzed, and some of them are obtained Useful results for seismic analysis.