基于下加载理论的土料广义塑性本构模型  

A generalized plasticity constitutive model with the sub-loading theory

作　　者：张博[1] 朱晟[2] ZHANG Bo;ZHU Sheng(Shangdong Electric Power Engineering Consulting Institute Corp.Ltd.,Jinan 250013,China;Institute of Hydraulic Structure,Hohai University,Nanjing 210098,China)

机构地区：[1]山东电力工程咨询院有限公司,山东济南250013 [2]河海大学水工结构研究所,江苏南京210098

出　　处：《技术与市场》2022年第10期6-10,15,共6页Technology and Market

摘　　要：采用Lagioia改进的剪胀方程推导了塑性流动方向的张量表达式,同时基于非关联流动法则定义了加载方向的张量表达式,进而获得参考屈服面的方程式。基于下加载理论,建立了当前屈服面和参考屈服面的映射关系,完成本构模型的推导。通过拟合试验资料获得相应的模型参数,利用FORTRAN语言编制该模型的程序,并预测试验土料的变形规律,预测结果与试验数据较好吻合,表明本模型可以较好地反映超固结土的变形特性。The plastic flow direction based on the Lagioia dilatancy equation.With non associated flow rule, a loading direction formulated is defined, then the yield surface formulated is obtained.Depend on the sub-loading theory, the relation of practical yield surface and referential yield surface is established.After the above process, the derivation of constitutive model is over.Obtaining model parameters by matching a soil test results.Writing the program of constitutive model by FORTRAN and predicting the deformation of the soil.The result of model can match the test data, and the validation can be proved.

关 键 词：循环荷载 屈服面 广义塑性理论 下加载理论 本构模型 

分 类 号：TU43[建筑科学—岩土工程]