【摘要】 本文基于临界状态理论,对Boukpeti等人提出的模型进行修改,得到一个新的砂土静态液化本构模型。采用微粒群算法对模型参数进行了优化。该模型的突出优点是:可以只用一组材料参数对不同初始状态下的土体响应进行模拟,而且相对原模型减少了模型参数的个数。通过对不同围压和初始密度条件下的三轴不排水试验的数值模拟验证了模型的预测能力。更多还原

【Abstract】 Based on the theory of critical state,the model proposed by Boukprti et al.is refined using the theory of state dependent,a new constitutive model for static liquefaction of sand is developed.The model parameters are determined using the particle swarm optimization method.The model can represent sand deformations over different densities and confining stresses with only one set of model parameters,moreover,the number of parameters are less than the original model.Numerical tests for undrained triaxial tests over different initial densities and confining stresses illustrate the capability of the model.更多还原