长春工程学院学报（自然科学版）2025，Vol.26Issue(3)：1-6,6.DOI:10.3969/j.issn.1009-8984.2025.03.001
大跨度钢网架施工过程中变形和应力监测
Deformation and Stress Monitoring During the Construction Process of Large-Span Steel Truss
摘要
Abstract
The installation of the steel grid structure on the roof of a certain automobile assembly workshop in Changchun City adopts the construction method of ground assembly into a whole and hydraulic synchro-nous lifting in place.Using finite element software to simulate and analyze various working conditions dur-ing the construction process,select points with significant deformation and stress changes during the con-struction period as monitoring points.The lifting height of monitoring points is measured through wireless laser rangefinders and the displacementsynchronization is provided feedback to the construction party.Dur-ing the construction interval after the completion of the jacking section,3D laser scanning modeling and da-ta organization are used to obtain the spatial position of the grid structure during the synchronous jacking process,and to verify its displacement synchronization.Using a vibrating string strain gauge to measure the stress of the members at regular intervals,it is wirelessly transmitted to the relay through Lora and then sent to the cloud platform through 4G network.The cloud platform receives and processes the stress data to monitor the stress of the truss during construction.The monitoring results show that the vertical dis-placement synchronization of each monitoring point of the grid structure is good during the construction process.During the lifting and positioning period,the stress variation amplitude of the members did not ex-ceed 50 MPa,which verified the safety of the structure.Continuous monitoring in the later stage showed that the grid members were less affected by snow loads.关键词
大跨度网架/变形/应力监测Key words
large-span grid structure/deformation/stress monitor分类
建筑与水利引用本文复制引用
袁志仁,王迪,张发强,黄倩雅,朱伟刚..大跨度钢网架施工过程中变形和应力监测[J].长春工程学院学报（自然科学版）,2025,26(3):1-6,6.基金项目
吉林省自然科学基金(YDZJ202301ZYTS497) （YDZJ202301ZYTS497）
