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悬臂钢桁-波形钢腹板组合桥梁是一种新型桥梁结构。钢桁-波形钢腹板共同工作,波形钢腹板主要解决纵向抗剪问题,悬臂钢桁主要解决横向抗弯问题。波形钢腹板组合桥梁形成纵向箱形结构,钢管混凝土桁形成横向悬臂结构。施工时两次形成横断面,可以有效减小箱梁横向宽度,方便运输及安装,桁架的上端与悬臂板刚性连接,钢桁的下端与箱梁底板刚性连接,采用抗拔不抗剪栓钉,解决受拉区混凝土抗裂问题,共同形成悬臂钢桁-波形钢腹板组合桥梁结构。对于主桥结构采用Midas/Civil 2010空间有限元分析程序进行分析的结果表明,空间放射性钢管混凝土组合桥墩处于弹性工作状态,主梁第1阶自振频率2.65 Hz,桥梁结构整体刚度好;第1阶屈曲稳定分析特征值为18.18,桥梁结构稳定性好。
Cantilever steel truss - corrugated steel web composite bridge is a new type of bridge structure. Steel girder - corrugated steel web work together, the corrugated steel web mainly to solve the problem of longitudinal shear, cantilever steel girder mainly to solve the transverse bending problems. The corrugated steel web composite bridge forms a longitudinal box-shaped structure, and the concrete-filled steel tube truss forms a transverse cantilever structure. The cross section of the girder can be formed twice during construction, which can effectively reduce the lateral width of the box girder and facilitate the transportation and installation. The upper end of the truss is rigidly connected with the cantilever plate, the lower end of the steel girder is rigidly connected with the box girder soleplate, , To solve the problem of concrete cracking in the tension zone together to form a cantilever steel truss - corrugated steel web composite bridge structure. The analysis results of the Midas / Civil 2010 space finite element analysis program for the main bridge show that the CFST piers of the CFST are in elastic working condition, the first natural frequency of the main girder is 2.65 Hz, and the overall structural rigidity of the bridge is good. The first The eigenvalue of the buckling stability analysis is 18.18, and the stability of the bridge structure is good.