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本文针对预应力混凝土连续箱梁,建立空间梁单元和三维实体有限元仿真模型并结合桥梁荷载横向分布理论,分析了墙式防撞护栏刚度对结构横向分布系数的影响,提出了考虑护栏刚度的荷载横向分布计算方法。计算结果与实测结果对比分析表明:考虑护栏刚度的荷载横向分布系数计算结果与实测值吻合较好,此荷载横向分布计算方法可应用于桥梁设计计算和结构承载力评定。
In this paper, for the prestressed concrete continuous box girder, the space beam element and the three-dimensional solid finite element simulation model are established and the transverse load distribution theory of the bridge is combined to analyze the influence of the wall crashworthiness fence on the transverse distribution coefficient of the structure. Calculation method of transverse distribution of load. Comparing the calculated results with the measured ones, the results show that the calculation results of the lateral distribution coefficient considering the stiffness of the guard rails are in good agreement with the measured values. The calculation method of lateral load distribution can be applied to the calculation of bridge design and the assessment of the bearing capacity of the structure.