RC结构二维非线性有限元分析模型的探讨

Investigation on material constitutive model of two-dimension nonlinear finite element analysis on RC structure

由于钢筋混凝土结构组成材料的特殊性,在有限元分析过程中,材料本构模型特别是混凝土的材料模型对分析结果的合理性和准确性有很大的影响。对RC结构的二维有限元分析(2D-FEA)的钢筋、混凝土的材料本构模型的合理选取进行了探讨,通过RC平板和单层剪力墙的二维非线性有限元分析,分析结果与试验结果符合较好,得出文中所探讨的材料本构模型能较好地模拟RC结构的非线性特性。

Material constitutive model of reinforced concrete structure, especially, the model of concrete have significant effect on the analytical results obtained from finite element analysis, because of complexity of RC components. This paper introduces constitutive models of concrete and steel for two-dimension finite element （2D-FEA） analysis and provides some suggestion on their application. The 2D-FEA analyses of RC panel and anti-seismic wall are per formed to verify the models above. According to the comparison between analysis results and test results, it can be concluded that the models provided in this paper are greatly suitable to 2D-FEA analysis of RC structures and can simulate their nonlinear performance.