在修正剑桥模型屈服面基础上,对循环荷载作用下,压缩及张拉空间的剪胀应力比Mc,ed以相变状态参数表达,模型采用与应力路径无关的硬化参数来替代修正剑桥模型中的塑性体应变增量,采用随动硬化规则。经排水及不排水循环试验结果验证,该模型较适合模拟剪胀性饱和砂土在循环荷载作用下的力学行为,如剪胀、硬化及软化现象等。模型的10个参数,用常规三轴试验就可获取。 Based on the revised yield surface of Cambridge model, the dilatational stress ratio of compression and tension space under cyclic loading is expressed as the phase transition state parameter. The model uses the hardening parameter independent of the stress path instead of the modified Cambridge model The plastic body strain increment, follow the rules of follow-up hardening. The results of drainage and undrained cyclic test show that this model is suitable for simulating the mechanical behavior of dilatancy saturated sand under cyclic loading such as dilatancy, hardening and softening. The 10 parameters of the model are obtained using a conventional triaxial test.