基于空间网格模型的装配式钢板组合梁桥受力分析

Stress Analysis of Prefabricated Steel Plate-Concrete Composite Girder Bridge based on Spatial Grid Model

装配式钢板组合梁桥在我国中小跨径的桥梁建设中应用越来越多,精细化结构分析是实现桥梁安全与经济的重要方法。对比分析了平面梁格模型、实体模型与空间网格模型的建模理论与计算结果,验证空间网格模型在装配式钢板组合梁桥计算中的可靠性与适用性。结果表明,空间网格模型在计算精度上优于平面梁格模型,建模难度上小于实体模型,是一种较适用于工程分析的计算方法。

The prefabricated steel plate-concrete composite girder bridge has been applied more and more in the construction of small and medium span bridges in China.The refined structure analysis is an important method to realize bridge safety and economy.In this paper,the modeling theory and calculation results of plane beam grillage model,solid model and spatial grid model have been analyzed and compared,then the reliability and applicability of spatial grid model in the calculation of steel plate-concrete composite girder bridge have been verified.The results have shown that the spatial grid model is superior to the plane beam grillage model in calculation accuracy,and the modeling difficulty is smaller than the solid model.It is a calculation method very suitable for engineering analysis.