建立在应变空间上的混凝土四参数破坏准则

提出了建立在应变空间上的混凝土四参数破坏准则,从而消除了Hooke定律假设和平面应力假设对有限元分析计算的影响.结合损伤模型,通过算例计算并与应力空间其他准则相比较,验证了该准则的合理性和可行性.该准则的特点是:形式简单,不仅能正确反映混凝土单轴应力状态下的强度,而且能很好地反映多轴应力状态下混凝土的强度.

Four-parameter failure criterion for concrete in strain space

With the four-parameter failure criterion presented in this paper, the influences are eliminated of the basic postulations of the Hooke law and the plain stress on the finite element calculation. In combination with the damage constitutive model, the present criterion was compared with other criteria in strain space, and the rationality and feasibility of the criterion were verified. With a simple form, the criterion can reflect the concrete strength precisely not only under uniaxial stresses but also under multiaxial stresses.