采用钢混组合梁拓宽既有混凝土桥梁时旧桥的受力分析

Force Analysis of Old Bridge during the Widening of Reinforced Concrete Box-girder for Existing Concrete Bridge

主要研究活载和新桥线性沉降两种作用下,采用钢-混凝土组合箱梁错孔拓宽既有混凝土桥梁时旧桥的受力情况。通过建立全桥模型,对比分析活载和沉降工况下刚接、铰接方案时,旧桥支座反力以及关键截面内力的情况,研究错孔拓宽后新旧桥的传力规律及横向不同连接方式对旧桥结构的影响。

The research on the force of old bridge during the widening of reinforced concrete box-girder for the existing concrete bridge is made mainly under two kinds of effects like live load and linear settlement of new bridge. The contrastive analysis on the counter force of old bridge support and internal force of key section during the scheme of rigid connection or hinged connection under the working condition of live load and settlement is made by building the whole bridge model,and the research on the influence of force transferring rule and different horizontal connection types of new and old bridges after the widening of staggered holes on the structure of old bridge is made.