悬臂现浇连续箱梁施工阶段变形与应力分析  

Deformation and Stress Analysis of Cantilever Cast-in-Place Continuous Box Girder in Construction Stage

作　　者：高典 王跃飞[1] 李俊 赵弘宇 张海歌 GAO Dian;WANG Yue-fei;LI Jun;ZHAO Hong-yu;ZHANG Hai-ge(China Construction Eighth Engineering DivisionCorp.Ltd.,Shanghai 200122,China)

机构地区：[1]中国建筑第八工程局有限公司,上海200122

出　　处：《工程建设与设计》2023年第3期116-118,共3页Construction & Design for Engineering

摘　　要：以某四跨预应力连续悬臂施工桥梁为例,根据现场实际施工流程,采用数值建模分析了悬臂浇筑施工、全桥合龙阶段桥梁的变形与应力,并得出结论:施工变形随挂篮施工节段的增加逐渐变大,中跨产生的位移大于边跨;施工节段外侧应力要大于内侧应力,合龙钢束张拉后钢束作用节段应力显著降低。Based on a four-span prestressed continuous cantilever construction bridge, according to the actual construction process on site, the deformation and stress of the bridge during cantilever construction and bridge closure are analyzed by numerical simulation modeling, and the following conclusions are drawn: With the increase of hanging basket construction segments, the construction deformation gradually increases, and the displacement of the middle span is greater than that of the side span;The stress on the outside of the construction segment is greater than the stress on the inside, and the stress on the action segment of the closed steel beam is significantly reduced after tensioning.

关 键 词：预应力 悬臂现浇 施工阶段 数值模拟 

分 类 号：U445[建筑科学—桥梁与隧道工程]