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混凝土-冷弯异型钢组合板的强度取决于钢-混凝土界面的纵向剪切破坏。在目前设计过程中,通常采用的纵向剪切强度设计方法,如them-k法和部分交互法,均基于足尺试验,经济性差,耗时长,且仍是半经验的。建立组合板的通用有限元法,将钢-混凝土剪切面作为接触问题,考虑粘贴和摩擦。在分析模型中考虑几何非线性和材料非线性。进行推出试验,验证初步有限元分析,并考虑接触面的粘贴和摩擦。采用本接触模型对组合板的受弯性能进行有限元分析。通过对比组合板的推出试验和弯曲试验,对基于非线性接触理论的有限元分析进行验证。结果表明:基于界面接触模型的有限元分析与试验结果吻合较好,可用于分析组合板的性能和极限承载力。
The strength of concrete-cold-formed shaped steel plates depends on the longitudinal shear failure at the steel-concrete interface. In the current design process, the commonly used methods of longitudinal shear strength design, such as the the-k method and the partial interaction method, are based on full-scale testing and are economically poor, time consuming and still semi-empirical. The common finite element method of composite plate was established. The steel-concrete shear surface was taken as the contact problem, considering the paste and friction. Consider geometric nonlinearity and material nonlinearity in the analytical model. Launched the test to verify the initial finite element analysis, and consider the contact surface of the paste and friction. The contact model is used to analyze the flexural behavior of the composite plate. The finite element analysis based on non-linear contact theory is validated by comparing the launch test and the bending test. The results show that the finite element analysis based on the interface contact model is in good agreement with the experimental results and can be used to analyze the performance and ultimate bearing capacity of composite plates.