摘要
钢结构加固不仅有利于保证在役钢结构安全,而且符合可持续发展理念,对于科学实施“城市更新”、促进“双碳”目标达成具有积极意义。为此,针对钢结构构件,梳理了焊接加固、螺栓和铆钉连接加固、粘贴钢板加固、粘贴纤维增强复合材及组合加固法等5种增大截面加固法和构件预应力加固法;针对连接与节点,重点阐述了栓焊并用连接、梁柱节点、螺栓球和焊接球节点、钢管节点等加固研究进展;并概述了钢结构体系间接加固法及钢结构修复技术。在此基础上,介绍了GB 51367—2019《钢结构加固设计标准》的代表性加固技术,并指出未来应进一步对传统加固技术定量化设计、节点加固技术与设计理论、CFRP加固理论、新材料、新技术的应用和结构体系加固机理等方面开展深入研究工作。
Retrofitting steel structures is not only beneficial for guaranteeing the safety of the structures in services, but also fits the idea of sustainable development. It is of positive significance to scientifically implement the ‘urban renewal’ and promote the achievement of the ‘double carbon’ targets. In terms of steel members, five retrofitting approaches by enlargement of section area, including the welding method, bolt connections or rivet connections, bonded steel plates, bonded fiber-reinforced polymers and composite retrofit, and prestress strengthening method, were summarized in this article. As for the connection and joints, the research advances of retrofitting combining connection with bolts and welds, beam-column joints, bolted spherical joints, welded spherical joints, and tubular joints were illustrated. Meanwhile, the research progress of retrofitting the steel structural system by indirect approaches and repairing techniques for local damage was outlined. On this basis, the representative technical points of GB 51367—2019 ‘Standard for design of strengthening steel structures’ were introduced. In the future, research efforts are suggested to make for developing quantitative design methods of traditional strengthening techniques, retrofitting technique and design theory of steel joints, theory of CFRP retrofitting, application of innovative materials and techniques, and reinforcement mechanism of structural system.
作者
王元清
宗亮
石永久
黎红兵
梁爽
完海鹰
WANG Yuanqing;ZONG Liang;SHI Yongjiu;LI Hongbing;LIANG Shuang;WAN Haiying(Department of Civil Engineering,Tsinghua University,Beijing 100084,China;School of Civil Engineering,Tianjin University,Tianjin 300350,China;Sichuan Institute of Building Research,Chengdu 610081,China;College of Civil Engineering,Hefei University of Technology,Hefei 230009,China)
出处
《建筑结构学报》
EI
CAS
CSCD
北大核心
2022年第10期29-40,共12页
Journal of Building Structures
基金
国家自然科学基金项目(51678339)
国家标准《钢结构加固设计规范》科研专项课题(2013-01)。
关键词
钢结构
加固
研究进展
加固设计标准
steel structure
retrofit
research advance
design specification of strengthening
