建筑钢结构进展2024，Vol.26Issue(2)：43-53,11.DOI:10.13969/j.cnki.cn31-1893.2024.02.005
带悬臂的张弦梁拉索-支座节点力学性能研究
Study on the Mechanical Properties of a Cable-Support Joint of Beam String Structure with Cantilever
摘要
Abstract
In order to obtain the mechanical properties of a cable-support joint of beam string structure with cantilever under different working conditions,the stress and strain distribution characteristics of the joint during the tensile process were obtained by establishing a multi-scale finite element model and carrying out a field test,combining with an actual project of a long-span beam string structure.The ultimate bearing capacity and failure load of the joint were obtained through the local joint finite element analysis,and the structure and thickness of the joint were optimized according to its stress characteristics.The results show that the stress of the joint connecting to cable is within the elastic range during the construction and service stage,which fully meets the mechanical property requirements.The failure load of the joint is about 3.2 times of the design load combination,and its failure mode is tensile failure at the area of cable hole on lug plate.After optimization,the stress distribution of the joint is more uniform and reasonable,and the load bearing capacity is improved.关键词
张弦梁/拉索-支座节点/多尺度模型/力学性能/现场试验Key words
beam string/cable-support joint/multi-scale model/mechanical property/field test分类
建筑与水利引用本文复制引用
张海涛,金泉,田武,刘召,文强,冯瑞胜,严仁章..带悬臂的张弦梁拉索-支座节点力学性能研究[J].建筑钢结构进展,2024,26(2):43-53,11.基金项目
重庆市教委科学技术研究项目(KJZD-K202112901),重庆市自然科学基金(cstc2020jcyj-msxmX0089) （KJZD-K202112901）
