应变空间混凝土的破坏准则

Failure criteria of concrete in strain space

基于混凝土的破坏主要取决于应变的特点，对平面应力、平面应变及一般三轴荷载作用下混凝土的变形和破坏特性进行了试验研究及分析。根据试验结果，定义了混凝土的不同破坏阶段及分界面的确定原则。在此基础上建立了相应于不同破坏阶段的应变空间的破坏准则。其特点是：考虑了主应变与剪应变间的非线性关系，且与试验结果符合较好．

The behaviors of deformation and strength of concrete under plane stress,plane strain and general triaxial loading states are studied experimentally because the failure of concrete mainly depends on the ultimate strain.Based on the experimental results the different failure stages of concrete are defined and the principle determining the interfaces of the different failure stages of concrete is given. The failure criteria corresponding to the different fai1ure stages of concrete in the strain space are proposed. The nonlinear relationship between the normal strain and the shear strain is considered in the failure criteria.