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将地基土-地铁车站结构体系视为平面应变问题,采用Davidenkov动力本构模型和动塑性损伤模型分别模拟土体和车站结构混凝土的动力特性,建立了土-地铁车站非线性动力相互作用的有限元分析模型,分别研究了在中远场地震动和近断层地震动作用下地铁车站结构的塑性损伤行为,得出结构内部损伤场的分布,用损伤指数分别衡量结构局部和整体的损伤程度,并分析了在地铁结构非线性损伤演化规律。结果表明:地铁车站结构的损伤破坏区域主要是中柱的顶部和底部,不同楼层的中柱损伤破坏存在差异,局部和整体损伤指数时程变化规律一致,在变形累积效应下表现出非减特性。
Considering the structural system of foundation soil-subway station as a plane strain problem, the dynamic characteristics of soil and station structure concrete are modeled by the Davidenkov dynamic constitutive model and the plastic-plastic damage model respectively, and the finite nonlinear dynamic interaction of the soil-subway station is established Meta-analysis model, the plastic damage behavior of the metro station structure under the earthquake and near-fault ground motions of COSCO was studied respectively. The distribution of the damage field inside the structure was obtained. The local and global damage degree of the structure was measured by the damage index In the subway structure of non-linear damage evolution. The results show that the damage and damage area of metro station structure is mainly the top and bottom of the center pillar. There is difference between the damage and destruction of the center pillar on different floors. The local and global damage indices are consistent with the time-course variation, showing non-decreasing characteristics under the cumulative effect of deformation .