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以湖南某箱梁桥为研究背景,应用MidasFea软件建立空间有限元模型计算分析顶板不同位置的纵向预应力筋由于泊松比效应在顶板产生的横向影响及顶板横向应力的分布规律,对预防施工中顶板纵向裂缝及横向预应力的设计值有一定的指导作用。
Taking a box girder bridge in Hunan Province as the research background, the finite element model of MidasFea was used to calculate and analyze the transverse influence of longitudinal prestressing tendons in different positions of the roof due to the Poisson’s ratio effect on the roof and the horizontal stress distribution in the roof, In the roof longitudinal cracks and transverse prestress design value has a certain guiding role.