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采用非线性有限元法,对钢筋混凝土板冲切破坏建模。提出1种模拟冲切破坏的分析程序。通过1个大比例尺的无抗剪钢筋的钢筋混凝土板的冲切破坏试验,说明该程序的有效性。通过一组参数分析,得出影响板抗冲切能力的关键因素。该程序用于模拟在伦敦帝国理工大学进行的大比例尺混合钢筋混凝土平板的冲切破坏响应。试件包括1个管状钢柱柱头和1个ACI318结构钢柱头。分析结果基本可以预估剪切柱头对抗剪承载力的贡献,并且能评估现行的钢柱头的可靠性。
Nonlinear finite element method is used to model the punching failure of reinforced concrete slabs. A simulation program to simulate punching failure is presented. The effectiveness of this procedure is demonstrated by the punching failure test of a large-scale reinforced concrete slab without shear reinforcement. Through a set of parameter analysis, the key factors that affect the punching ability of the board are obtained. The program was used to simulate the blanking failure response of large-scale hybrid reinforced concrete slab at Imperial College London. Specimens include a tubular steel column head and an ACI318 structural steel column head. The results of the analysis can basically predict the contribution of shear stigma to shear bearing capacity and evaluate the reliability of the existing stigma.