考虑反复加载时混凝土损伤积累的RC平板及剪力墙的有限元分析模型的开发

反复荷载作用下的混凝土、钢筋的本构模型是评价和分析钢筋混凝土(RC)结构的承载力-变形特性关键,旨在开发适用于反复荷载作用下RC平板、剪力墙的2维非线性有限元分析的材料本构模型,探讨并推出了反复荷载作用下在混凝土的本构模型中考虑混凝土损伤积累的方法;并对RC平板和剪力墙进行了反复加载的2维有限元模拟。分析结果与实验结果的比较表明,采用所建议的考虑损伤积累的2维非线性有限元分析模型由加载至最大承载力前能很好的模拟反复加载时RC平板、剪力墙的非线性特性。

DEVELOPMENT OF FEA MODELS OF RC SLABS AND SHEAR WALLS CONSIDERING DAMAGE ACCUMULATION UNDER REVERSE CYCLIC LOADING

The constitutive models of concrete and steel are very important for investigating the behavior of loading capacity-deformation of reinforced concrete structures. The purpose of this paper is to develop material constitutive models for two-dimensional nonlinear finite element analysis of RC panels and shear walls subjected to reverse cyclic loading. The method for considering damage accumulation of concrete under cyclic loading is presented and two-dimensional nonlinear finite element analyses of RC panels and shear walls are carried out. Based on the comparison between analysis results and test results, it is concluded that the nonlinear behavior of RC panels and shear walls subjected to reverse cyclic loading can be simulated well with the two-dimensional finite element models provided in this paper, which considers damage accumulation.