基于无应力状态法的运营期混凝土斜拉桥调索关键技术研究  

Research on Key Techniques for Cable Adjustment of Concrete Cable-stayed Bridges during Operation Period Based on Stress-free State Method

作　　者：陈浩 蒋超越 CHEN Hao;JIANG Chaoyue(China Merchants Chongqing Communications Technology Research&Design Institute Co.,Ltd.,Chongqing 400067)

机构地区：[1]招商局重庆交通科研设计院有限公司,重庆400067

出　　处：《公路交通技术》2025年第1期84-90,98,共8页Technology of Highway and Transport

摘　　要：由于早期斜拉桥设计理论不完善,施工控制水平较低,较多运营期斜拉桥现有结构状态与原设计状态存在差异,为解决运营期斜拉桥索力异常、内力状态不佳的问题,采用基于无应力状态法的调索方法,先通过各种实测方法及索力精确识别方法对桥梁结构现状进行精确识别,再基于原设计成桥目标状态求得索力调整目标状态,最后采用无应力状态法对斜拉桥调索过程控制。结果表明:采用无应力状态法进行斜拉桥索力调整,能精确控制调索后的斜拉索索力,以达到主梁内力状态的优化目标,保障桥梁结构安全,可供运营期斜拉桥索力调整参考。Due to the incomplete design theory and low construction control level of early cable-stayed bridges,there are many differences between the existing structural state and the original design state of cable-stayed bridges during operation.In order to solve the problem of abnormal cable force and poor internal force state of cable-stayed bridges during operation,a cable adjustment method based on the stress-free state method is adopted.First,various measurement methods and precise identification methods of cable force are used to accurately identify the current status of the bridge structure.Then,the target state of cable force adjustment is obtained based on the original design of the bridge.Finally,the stress-free state method is used to control the cable adjustment process of cable-stayed bridges.The results show that using the stress-free state method for cable force adjustment of cable-stayed bridges can accurately control the cable force of the cables after adjustment,achieving the optimization goal of the internal force state of the main beam,ensuring the safety of the bridge structure,and providing reference for cable force adjustment of cable-stayed bridges during operation.

关 键 词：无应力状态法 运营期斜拉桥 索力调整 

分 类 号：U443.38[建筑科学—桥梁与隧道工程]