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针对板式桥梁张拉过程中因局部承压出现的裂缝,首先进行了病害的成因分析和相关规范规定的比较,然后进行了20 m预应力空心板桥锚下局部承压的有限元分析,并将分析计算结果与空心板桥端部破坏的调研情况相结合,为板式桥梁通用图的梁端截面尺寸及配筋设计提供了理论依据。
Aiming at the cracks caused by local bearing pressure during the process of tensioning of slab bridges, the cause of formation of the slab bridges and the comparisons of relevant codes and regulations were firstly carried out. Then the finite element analysis of local bearing under 20 m prestressed hollow slab bridges and anchors was carried out. Combining the results of the analysis and the investigation of the failure of the end of the hollow slab bridge, this study provides a theoretical basis for the cross-sectional dimension and reinforcement design of the beam end of the general plan of slab bridge.