等代拱法考虑拱上建筑受力的多跨空腹式拱桥荷载试验应用

Application of Equivalent Arch Method in Load Test of Multi-span Open Spandrel Arch Bridge

对于空腹式拱桥设计阶段不考虑拱上建筑参与受力,这与桥梁实际受力状况不符,拱上建筑在一定程度上要参与拱圈受力。为了更好地空腹式拱桥的真实受力情况进行反应,在计算模型的时候考虑拱上建筑的影响是很十分必要的。对一座三跨空腹式拱桥的荷载试验,采用等代拱法考虑拱上建筑的影响建模分析,通过实测数据与理论数据分析对比,校核计算合理性,为同类型拱桥的荷载试验提供参考。

It is not to match the actual stress state of the bridge if not considering the arch structure in the design of open spandrel arch bridge.The arch structure should take part in the stress of arch ring to some extent In order to better reflect the actual stress state of open spandrel arch bridge,it is very necessary to consider the influence of arch structure in the calculation model The equivalent arch method is used to consider the influence of arch structure on the modeling analysis for the load test of a three-span open spandrel arch bridge.According to the analysis and comparison of the measured data and the theoretical data,its rationality is checked and calculated,which can be referenced for the load test of the similar arch bridges.