不同横向连接方式对拓宽装配式小箱梁混合受力性能研究

The Study of the Different Transverse Connection Way on the Mixing Force Performance of Broaden Fabricated Small Box Beam

针对不同横向连接方式对拓宽装配式小箱梁混合受力性能研究,以长邯高速改扩建工程中某预应力连续箱梁为依托工程,应用MIDAS CIVIL软件建立不同横向连接方式拓宽的装配式小箱梁的梁格模型,从活载作用引起的内力变形规律及荷载横向分布系数入手,分析了不同连接方式对桥梁拓宽后混合结构受力的影响。结果表明:不同横向连接方式在活载作用下引起的新桥边梁的内力及挠度的差异不大,但可以明显降低拓宽前旧桥边梁的内力及挠度。从横向连接方式对旧桥受力的贡献度来看,强刚接连接方式贡献最大,铰接连接方式影响最小。

This paper studied the mixing force performance of the different transverse connection way on the broaden fabricated small box beam, based on a prestressed continuous box beam of Changhan Highway reconstruction engineering. Using MIDAS CIVIL software, it also established the fabricated small box beam grillage model that broaden by the different transverse connection way. Starting from the internal force deformation law and load transverse distribution coefficient caused by the live load action, it also analyzed the influence of different connection way on the mixed structure force after the bridge widening.