建筑钢结构进展2026，Vol.28Issue(2)：105-114,10.DOI:10.13969/j.jzgjgjz.20240920001
大跨度体外预应力钢梁施工技术研究
Construction Technology for Large-Span External Prestressed Steel Beams
摘要
Abstract
A double-cable solid-web prestressed steel beam was used for the roof structural beam of a conference center auditorium.Using finite element software,three tensioning methods including overhead one-time tensioning,ground one-time tensioning and phased tensioning were compared.A sensitivity analysis was carried out to investigate the effects of unsynchronized tensioning that may occur during the tensioning process.In addition,the strength and deformation of the prestressed steel beam in the whole process of the construction stage and under the subsequent construction loads were analyzed and compared with the construction monitoring results.The results show that when the prestress tension deviation is within 5%,its effects on the strength,deformation,and stability of the steel beam can be effectively controlled.The finite element analysis results show good agreement with the monitoring data in terms of structural strength and deformation,with variation trends consistent with actual construction conditions.The structural performance indices of the structure are within the specification requirements during the whole construction process and under the subsequent construction loads.关键词
体外预应力钢梁/张拉施工方法/数值模拟/不同步张拉/敏感性分析/施工监测/应力和变形Key words
external prestressed steel beam/tensioning construction method/numerical simulation/unsynchronized tensioning/sensitivity analysis/construction monitoring/stress and deformation分类
建筑与水利引用本文复制引用
谢贻军,洪绍正,童林浪,盘洪玉,沈正峰,周晓敏..大跨度体外预应力钢梁施工技术研究[J].建筑钢结构进展,2026,28(2):105-114,10.基金项目
安徽省住房城乡建设科学技术计划(2024-YF093) （2024-YF093）
