混凝土弹塑性损伤帽盖模型参数确定研究

Parameters determination of elasto-plastic damage cap model for concrete materials

基于连续损伤力学和塑性力学理论形成的弹塑性损伤帽盖模型是一个高级混凝土本构关系模型,但模型涉及的参数过多却给运用造成了不便。对模型参数进行详细解释基础上,采用已有的混凝土材料试验数据给出了其子午线强度参数、帽盖参数、脆性损伤和延性损伤参数取值,大大方便了工程运用。最后以单轴拉伸和单轴压缩为例数值演示了模型基本力学特性。

Elasto-plastic damage cap model is an advanced constitutive model for concrete,based on continuum damage mechanics in combination with plasticity theory.However,too many parameters involved in this model bring inconvenience in the course of application.Based on detail explanations of its parameters and according to the test data for concrete materials,parameters of strength at meridians,cap surface configuration,brittle damage and ductile damage in the model were attracted as essential parameters,which ease the engineering application of the model greatly.Basic characteristics of the model were demonstrated through the uniaxial tensile and uniaxial compressive simulations.