3×30m预应力连续箱梁配束分析

Matching analysis of 3 ×30 m prestressed continuous box girder

以支架现浇的3×30 m连续预应力箱梁为背景,分析了箱梁在各种作用下及综合作用下(不配置预应力)的应力状态,得到配束目标,对腹板束、顶板束及底板束效应分别进行比较分析,得到各类钢束主、次应力的规律及综合效应下完成目标的情况,以供该类桥配束参考。

Taking cast-in-situ 3 × 30 m prestressed continuous box girder as the background,the paper analyzes the stress conditions of box girder under various functions（ without prestress）,and obtains the matching target,compares the lib board reinforcement,top board reinforcement and bottom board reinforcement effect,and finally achieves various major and secondary stress law of steel reinforcement and their targets under comprehensive effect,with a view to provide some guidance for similar bridge reinforcement.