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当混凝土板受到平面内的侧向约束时,由于压缩薄膜效应(Compressive Membrane Action-CMA)的存在,板的极限承载力大幅提高。为了研究混凝土单向板在压缩薄膜效应作用下的结构性能,应用非线性有限元方法进行了数值模拟分析。ABAQUS作为主要的分析软件,其数值模拟结果与试验结果进行比较,验证数值模型的正确性和可行性,并应用Atena和Ansys分析软件的数值模拟结果对ABAQUS的结果进行了对比和校核。本次研究中对一组带有侧向约束的混凝土单向板进行了非线性有限元模拟。在该组试验中通过改变单向板的横向约束刚度来反映桥梁面板的工作性能。通过与试验结果的对比,可以发现有限元模型提供的极限承载力分析结果与实验结果有着良好的吻合。
When the concrete slab is restrained laterally in the plane, the ultimate bearing capacity of the slab is greatly increased due to the Compressive Membrane Action-CMA. In order to study the structural performance of concrete unidirectional slab under the action of compressive film effect, numerical simulation analysis is carried out by using the nonlinear finite element method. ABAQUS was used as the main analysis software. The numerical simulation results were compared with the experimental results to verify the correctness and feasibility of the numerical model. The results of ABAQUS were compared and checked by numerical simulation results of Atena and Ansys analysis software. In this study, a series of nonlinear finite element simulations of a unidirectional slab with lateral restraint were carried out. In this group of experiments, the behavior of the bridge panel is reflected by changing the lateral restraint stiffness of the one-way slab. By comparing with the experimental results, it can be found that the ultimate bearing capacity analysis results provided by the finite element model are in good agreement with the experimental results.