四跨连续刚构桥合龙顶推力计算与效应分析

摘要

以康家河大桥为背景，介绍了顶推力的计算过程，并分析了合龙顶推对施工控制、运营阶段的挠度及桥墩内力的影响。结果表明，施加顶推力对桥梁运营阶段的挠度影响很小，但能改善主墩的受力。%Taking the Kangjia River Bridge as the background,the paper introduces the calculation process of pushing closure force,analyzed the influence of pushing closure force on the deflection and internal force of bridge pier both in the construction phase and post-construction phase.The results show that pushing closure force has a small influence on the deflection in post-construction phase,but it can improve internal force of the main piers.