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GQJS在波形钢腹板连续箱梁桥施工过程计算中的应用

, PP. 67-72

Keywords: 桥梁工程,施工控制,有限元分析,波形钢腹板,组合梁桥

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Abstract:

为研究波形钢腹板组合箱梁的变形特点,以山东鄄城黄河公路大桥为工程依托,基于桥梁结构分析软件GQJS采用了两种单元离散方式进行该桥的施工过程分析。方法1简称"1节点法",即顶底板混凝土和中间钢腹板单元共用节点,顶底板挠曲变形符合平截面假定,并用平钢板代替波形钢腹板,为考虑波形钢腹板褶皱效应,将波形钢板Q345钢材的弹性模量按轴向刚度等效的方法进行折减。方法2简称"2节点法",即顶底板混凝土单元节点独立,由钢腹板连接顶底板单元,顶底板挠曲变形不符合平截面假定,可以有相对位移,波形钢腹板控制上下节点相对位移。研究结果表明采用1节点法和2节点法所得变形计算结果相差不大,并且都与实测结果相吻合,证明这两种单元离散方式均是可行的。

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