长沙理工大学学报（自然科学版）2024，Vol.21Issue(4)：131-139,9.DOI:10.19951/j.cnki.1672-9331.20240122002
钢管混凝土拱桥斜拉扣挂施工的无应力状态控制法
Unstressed state control method for cable-stayed construction of concrete-filled steel tube arch bridges
摘要
Abstract
[Purposes]This article aims to avoid the influence of temperature,temporary loads,and other factors on the cable force during the construction process of concrete-filled steel tube arch bridges and achieve precise and efficient control of the large-span arch bridges constructed by assembling cable-stayed buckles and hanging segments.[Methods]A control method is proposed to adjust the process state of arch bridges by replacing the the cable force with the unstressed length of the cable.The calculation formula for the unstressed length of the cable considering the sag effect and the tower deviation is derived,and the relationship between the increment of the cable force and the change of the unstressed length of the cable is studied.[Findings]The engineering calculation results show that the maximum error of cable force based on the unstressed state method is about 5％,and the maximum elevation deviation is 3.7 cm.The calculation accuracy meets the requirements,achieving precise and efficient construction control.[Conclusions]This method can eliminate the influence of temperature and temporary load changes on cable force,reduce the calculation workload of intermediate state of construction,and provide technical support for the assembly of large-span concrete-filled steel tube arch rib segments.关键词
钢管混凝土拱桥/无应力状态法/无应力长度/扣塔偏位/垂度效应Key words
concrete-filled steel tube arch bridge/unstressed state/unstressed length/tower deviation/sag effect分类
交通工程引用本文复制引用
吴学伟,周倩,刘睿,杜春林..钢管混凝土拱桥斜拉扣挂施工的无应力状态控制法[J].长沙理工大学学报（自然科学版）,2024,21(4):131-139,9.基金项目
重庆市自然科学基金面上项目(CSTB2022NSCQ-MSX0661) （CSTB2022NSCQ-MSX0661）
重庆市建设科技计划项目(城科字2023第1-10号) （城科字2023第1-10号）
重庆市教委科学技术研究项目(KJQN202304301) Project(CSTB2022NSCQ-MSX0661)supported by Chongqing Natural Science Foundation Project （KJQN202304301）
Project(Chengkezi 2023 No.1-10)supported by Chongqing Construction Science and Technology Plan Project （Chengkezi 2023 No.1-10）
Project(KJQN202304301)supported by Chongqing Municipal Education Commission Science and Technology Research Project （KJQN202304301）
