同济大学学报（自然科学版）2025，Vol.53Issue(5)：697-705,9.DOI:10.11908/j.issn.0253-374x.24077
碳纤维布加固管桁架节点的工程应用研究
Engineering Application of Tubular Truss Joints Strengthened with Carbon Fiber Reinforced Polymer Sheets
摘要
Abstract
This study explores the engineering application of carbon fiber reinforced polymer(CFRP)sheets reinforcement on circular hollow section(CHS)joints of a stadium roof.It investigates several aspects,including reinforcement strategies of CFRP wrapping multiplanar CHS joints,shear strength tests of adhesive for CFRP at different temperatures,influence of steel surface coatings on the bonding strength of adhesives,bonding strength tests of fire coatings-CFRP,and mechanical tests of CFRP reinforced CHS KT-joints.The results indicate that the change of environmental temperature and the original coatings on steel tube surfaces influence the bonding strength of adhesives.It is essential to select a suitable adhesive for CFRP reinforcement,and the original steel tube coatings should be removed.Fire coatings can be directly sprayed on the CFRP.Compared to the bare CHS KT-joint,the CFRP-reinforced CHS KT-joint exhibited a 24%increase in load-bearing capacity and a 25%increase in ductility.Reinforcing CHS welded joints with CFRP sheets proves to be a feasible and effective method,making it a distinct choice for situations where the load-bearing capacity requires moderate enhancement.关键词
碳纤维布加固方法/胶接接头抗剪强度试验/胶粘剂‒钢管表面抗拔试验/防火涂料‒碳纤维布抗拔试验/碳纤维布加固KT型管节点试验分类
土木建筑引用本文复制引用
童乐为,王甜甜,徐晓明,高峰,史炜洲,周锋,武诣霖,严斌..碳纤维布加固管桁架节点的工程应用研究[J].同济大学学报（自然科学版）,2025,53(5):697-705,9.基金项目
上海市高峰学科建设项目(编号2019010301) （编号2019010301）
