多跨先简支后连续小箱梁桥支座顶升优化与分析

Jacking-Up Optimization and Analysis for Bridge Bearing of Multiple-Span Simple-Continuous Small Box Beam Bridge

针对多跨先简支转连续小箱梁桥支座更换进行研究,通过建立多跨简支转连续小箱梁桥的有限元模型,对支座更换进行仿真分析,并对比3种顶升更换支座的方案合理性和经济性,得出多跨同步顶升方案优于单墩顶升和全联顶升的方案,为同类桥梁支座更换提供参考。

The replacing bridge bearing of multiple-span simple-continuous small box beam bridge was studied, thesimulation analysis of bearing replacement was made by building it＇s finite element model, and comparing on ratio-nality and efficiency of the three jacking-up for bridge bearing programme, it was concluded that multiple-jpan jyn-chronous jacking-up was better than single pier jacking-up and the all pier jacking-up, to provide a reference forsimilar bridge bearing replacement.