组合梁斜拉桥施工过程实桥试验  

RESEARCH ON REAL BRIDGE TEST IN CONSTRUCTION PROCESS OF COMPOSITE GIRDER CABLE-STAYED BRIDGE

作　　者：刘洋[1,2] 周世军[2] 常鸣[1] LIU Yang;ZHOU Shijun;CHANG Ming(State Key Laboratory of Geohazard Prevention and Geoenvironment Protection,Chengdu University of Technology Chengdu 610059,China;School of Civil Engineering,Chongqing University,Chongqing400045,China)

机构地区：[1]成都理工大学地质灾害防治与地质环境保护国家重点实验室,成都610059 [2]重庆大学土木工程学院,重庆400045

出　　处：《钢结构》2018年第10期113-119,95,共8页Steel Construction

基　　金：国家自然科学基金项目(41702312)

摘　　要：为研究施工过程中组合梁斜拉桥索力、标高、塔偏及应力的变化规律,以全长714 m的兰州某大桥为背景,通过实测该桥施工过程中的线形及力学指标,并结合理论分析结果,对最大双悬臂、单悬臂、合龙及二期恒载等主要施工控制阶段进行了研究。结果表明:单、双悬臂施工阶段约束条件不同,位移、塔偏及应力呈现不同的规律;合龙后结构内力及线形除跨中区域较最大单悬臂阶段变化较大外,其余部分与最大单悬臂阶段基本相同;二期恒载对塔顶水平位移和主梁跨中竖向位移影响较大。In order to study the variation law of cable force, elevation,tower deviation and stress of composite girder cable-stayed bridge in the construction process, a bridge in Lanzhou with a total length of 714 meters was taken as the example, the linear and mechanical indexes in the main construction control stages of the maximum double cantilever, single cantilever, bridge and secondary dead load were analyzed and studied. The results showed that the constraints of single and double cantilever construction were different, and the displacement, tower deviation and stress showed different rules. The internal force and the line type of the bridge were basically the same as the maximum single cantilever phase except that the maximum single cantilever was larger than that in the middle area. The secondary dead load had a great influence on the horizontal displacement of the tower and the vertical displacement in the span of the main beam.

关 键 词：斜拉桥 施工过程 实桥试验 组合梁 应力 

分 类 号：U446[建筑科学—桥梁与隧道工程] U448.27[交通运输工程—道路与铁道工程]