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为了探索有限元分析模型的合理性,为波形钢板结构分析和内力计算提供可靠依据,以实际工程为依托,论述将三维实体模型简化为平面模型时板体刚度和荷载折减系数对模型的影响,并考虑土体参数及结构参数,采用平面应变模型在ANSYS有限元分析软件上建立有限元分析模型,用以分析结构受力状态。利用土体弹塑性模型、结构线弹性模型和考虑土体与结构间接触问题的综合分析方法对低拱型波形钢板桥梁的应力应变状态进行探索,并将分析结果与CHBDC(加拿大桥梁设计规范)设计方法进行对比,总结结果不同的原因和简化模型的合理性。最终确定采用平面应变模型对波形钢板结构进行简化分析。
In order to explore the rationality of the finite element analysis model and provide a reliable basis for the structural analysis and internal force calculation of the corrugated steel plate, based on the actual project, the influence of the plate stiffness and the load reduction coefficient on the model when the three-dimensional solid model is simplified to the planar model , And considering the soil parameters and structural parameters, the plane strain model is used to establish the finite element analysis model on ANSYS finite element analysis software to analyze the stress state of the structure. The stress-strain state of low arch corrugated steel bridges is explored by using the elastic-plastic model of soil, the elastic model of structure and the comprehensive analysis method considering the contact between soil and structure. The analysis results are compared with those of CHBDC (Canadian Bridge Design Code) Design method to compare, summarize the different reasons and simplify the rationality of the model. The plane strain model is finally determined to simplify the analysis of the corrugated steel plate structure.