V墩波形钢腹板连续刚构桥中跨合龙段顶推力计算与分析  

Calculation and Analysis of Thrust Force of Middle Span Closure Section of V-Pier Corrugated Steel Web Continuous Rigid Frame Bridge

作　　者：王超 廖海亮 余少华 王鹏 杨林旗 WANG Chao;LIAO Hai-liang;YU Shao-hua;WANG Peng;YANG Lin-qi(Jiangxi Communication Design and Research Institute Co.Ltd.,Nanchang 330052,China;Jiangxi Highway Bridge Engineering Technology Research Center,Nanchang 330052,China)

机构地区：[1]江西省交通设计研究院有限责任公司,南昌330052 [2]江西省公路桥梁工程技术研究中心,南昌330052

出　　处：《工程建设与设计》2024年第22期39-41,共3页Construction & Design for Engineering

基　　金：江西省交通运输厅科技项目(2023H0007)。

摘　　要：合龙顶推对大跨径V墩波形钢腹板连续刚构桥力学性能与位移有一定影响,论文结合实际工程,分析了混凝土收缩与徐变造成的V墩墩顶位移、V墩墩底弯矩及墩底轴力、V墩墩身裂缝,并采用桥梁博士V4有限元软件建立不同跨中合龙顶推力状态下的有限元模型,分析了在各种跨中合龙顶推力的情况下,V墩波形钢腹板连续刚构桥V墩的力学性能与位移。研究结果表明,在跨中合龙前施加顶推力可以有效减小收缩徐变使V墩产生的位移及内力,改善桥梁受力。Closure pushing has certain influence on the mechanical properties and displacement of long-span V-pier continuous rigid frame bridge with corrugated steel webs. Combining with practical projects, the paper analyzes the displacement of V-pier top, the bending moment of V-pier bottom, the axial force of V-pier bottom and the cracks of V-pier body caused by concrete shrinkage and creep. The finite element model of V-pier in different thrust state of mid-span closure was established by using Dr. Bridge V4 finite element software. The mechanical properties and displacement of V-pier in continuous rigid frame bridge with corrugated steel web were analyzed under different thrust state of mid-span closure. The results show that applying the top thrust before the mid-span closure can effectively reduce the displacement and internal force of V-pier caused by shrinkage and creep, and improve the force of the bridge.

关 键 词：桥梁工程 V墩波形钢腹板 合龙 顶推力 

分 类 号：U442[建筑科学—桥梁与隧道工程] U448.23[交通运输工程—道路与铁道工程]