空心板梁桥铰缝损伤对横向传力的影响研究

Influence of Hinge Joint Damage on Transverse Force Transfer of Hollow Slab Girder Bridge

为研究空心板梁桥铰缝损伤对桥梁整体横向传力效应的影响,运用有限元分析软件ANSYS建立空心板梁及铰缝实体单元模型,分析铰缝不同损伤程度对应的空心板梁桥控制截面的挠度和应力分布情况。研究结果表明:铰缝损伤后,空心板梁底板应力传递发生明显变化;随损伤程度增加,底板应力传递向外逐渐减小,横向传力能力逐级削弱,并且铰缝损伤处会出现应力集中现象,有损害进一步扩张的趋势。分析结果可以为空心板梁桥的铰缝损伤情况研究提供参考,并给出既有空心板梁桥在工程实践中的维护管理重点。

To study the influence of hinge joint damage of hollow slab girder bridge on the overall transverse force transfer effect of the bridge,the solid element model of hollow slab girder&hinge joint is established by using the finite element analysis software ANSYS,and the deflection&stress distribution of the control section of hollow slab girder bridge corresponding to different damage degrees of hinge joint are analyzed.The results show that the stress transfer of hollow slab girder floor changes obviously after hinge joint damage;with the increase of the damage degree,the stress transmission of the bottom plate gradually decreases outward,the transverse force transmission capacity decreases step by step,and the stress concentration phenomenon will appear at the hinge joint damage,with the trend of further expansion of the damage.The analysis results can provide reference for the study of hinge joint damage of hollow slab girder bridge,and give the key points of maintenance and management of existing hollow slab girder bridge in engineering practice.