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基于混凝土材料本构模型,结合精细化结构单元模型和高效稳定的数值算法,实现了混凝土结构的动力倒塌全过程分析。对建模方法、结构分析方法、材料与构件失效准则等进行了简要介绍。以某钢筋混凝土框架-剪力墙结构为例,分别采用混凝土弹-脆性本构模型、弹塑性本构模型和随机损伤本构模型进行了结构地震倒塌全过程分析。结果表明:混凝土本构模型对结构倒塌分析具有重要的基础地位,本构模型选取不当,将给出错误的倒塌模式或分析结果;混凝土随机损伤本构模型能够准确地预测结构的强非线性行为,可用于复杂混凝土结构倒塌全过程的模拟。
Based on the constitutive model of concrete material, combined with the refined structural element model and the efficient and stable numerical algorithm, the whole process of dynamic collapse of concrete structure is realized. The modeling methods, structural analysis methods, material and component failure criteria are briefly introduced. Taking a reinforced concrete frame-shear wall structure as an example, the whole process of structural earthquake collapse was analyzed using the elastic-brittleness constitutive model, the elastic-plastic constitutive model and the random damage constitutive model respectively. The results show that the concrete constitutive model plays an important fundamental role in the structural collapse analysis. The improper selection of the constitutive model will give wrong collapse patterns or analysis results. The stochastic damage constitutive model of concrete can accurately predict the strong nonlinear behavior of the structure , Which can be used to simulate the whole process of the collapse of complex concrete structures.