建筑钢结构进展2024，Vol.26Issue(5)：93-100,8.DOI:10.13969/j.cnki.cn31-1893.2024.05.011
某钢网架加固设计
Strengthening Design of a Steel Grid Structure
彭敏 1赵仕兴 1刘宇鹏 2罗焱 3唐元旭 1周巧玲1
作者信息
- 1. 四川省建筑设计研究院有限公司,成都 610017
- 2. 四川省建筑设计研究院有限公司,成都 610017||西南交通大学土木工程学院,成都 610031
- 3. 四川省建筑科学研究院有限公司,成都 610081
- 折叠
摘要
Abstract
Due to the problems left over from construction and the increase of service load,a grid structure project has hidden trouble of quality and safety.This paper systematically introduces the reinforcement scheme of the grid structure,the compression rods are strengthened by using thin-walled channel steel,thin-walled rectangular pipe or angle iron as the external constraint element.The tension rods are reinforced by adopting the double channel steel to increase the cross section.The bolts are reinforced by welding drum joints on the original bolt ball joints or by adding high strength pull screws.MST and NIDA software are used to verify the structure model and direct analysis method is used to calculate the bearing capacity of the grid.Strengthening plans are introduced and refined finite element analysis is carried out on the reinforcement scheme of the compression rod.The load-displacement curves and failure modes of reinforced and unreinforced rods are compared.The results show that,after reinforcement,the bearing capacity of rod is increased by 15％～33％and the failure mode changes from unstable failure to strength failure.After the overall reinforcement is completed,under the condition of increasing loads and considering the initial and overall defects,the grid structure can meet the requirements of Unified Standard for Reliability Design of Building Structures(GB 50068-2018).关键词
网架结构/加固设计/直接分析法/有限元分析Key words
grid structure/strengthening design/direct analysis method/finite element analysis分类
建筑与水利引用本文复制引用
彭敏,赵仕兴,刘宇鹏,罗焱,唐元旭,周巧玲..某钢网架加固设计[J].建筑钢结构进展,2024,26(5):93-100,8.
