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1.重庆大学土木工程学院,重庆 400045
2.重庆大学山地城镇建设与新技术教育部重点实验室,重庆 400045
3.中冶建筑研究总院有限公司,北京 100089
Received:13 April 2021,
Revised:2021-07-02,
Published:15 August 2021
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王卫永,冉甜,逯鹏等.钢结构梁柱节点抗火性能研究进展与展望[J].防灾减灾工程学报,2021,41(04):837-849.
WANG Weiyong,RAN Tian,LU Peng,et al.Research Progress and Prospect on Fire Resistance of Steel Beam⁃to⁃Column Connections[J].Journal of Disaster Prevention and Mitigation Engineering,2021,41(04):837-849.
王卫永,冉甜,逯鹏等.钢结构梁柱节点抗火性能研究进展与展望[J].防灾减灾工程学报,2021,41(04):837-849. DOI: 10.13409/j.cnki.jdpme.202104013.
WANG Weiyong,RAN Tian,LU Peng,et al.Research Progress and Prospect on Fire Resistance of Steel Beam⁃to⁃Column Connections[J].Journal of Disaster Prevention and Mitigation Engineering,2021,41(04):837-849. DOI: 10.13409/j.cnki.jdpme.202104013.
钢结构不耐火,在一定程度上制约了钢结构的应用和发展。为了探明钢结构在火灾下的工作性能,对钢结构基本构件的抗火性能进行了大量研究,提出了相应的设计理论与方法。梁柱节点是钢结构中十分关键的部位,在火灾下的可靠连接是保证钢结构火灾安全的重要前提。为了全面了解钢结构梁柱节点在火灾下的受力性能和破坏机理,从试验研究、有限元模拟和组件分析法三个方面系统地梳理了国内外关于节点抗火性能的研究进展。比较了高温下不同类型节点的力学性能,探讨了多种关键参数对节点在火灾下工作性能的影响规律,介绍了不同类型节点的高温组件分析模型以及弯矩―转角曲线数学模型。分析表明:节点构造形式对钢框架火灾安全有较大影响;通过设置柱腹板加劲肋、提高螺栓强度等级以及增加连接件的厚度等可以有效地提高节点的抗火性能。最后剖析了钢结构梁柱节点抗火研究中存在的不足,对未来值得关注和重视的关键问题提出展望。
The poor fire resistance of steel structure restricts its application and development to a certain extent. In order to find out the working performance of steel structure in fire, people have done a lot of research on the fire resistance performance of basic components in steel structures, and proposed corresponding design theory and method. Beam-column joint is a key part of steel structure. Reliable connection under fire is an important premise to ensure the fire safety of steel structure. In order to fully understand the mechanical behavior and failure mechanism of steel beam-column joints under fire, the research progress of fire resistance performance of joints at home and abroad is systematically reviewed from three aspects: experimental research, finite element simulation and component analysis. The mechanical properties of different types of joints at high temperature are compared in this paper, and the influence of various key parameters on the working performance of joints under fire is discussed. The high-temperature component analysis models of different types of joints and the mathematical models of moment-rotation curves are introduced. The analysis shows that the joint form has great influence on the fire safety of steel frames. The fire resistance of the joints can be effectively improved by setting stiffeners in the column web, improving the strength grade of bolts and increasing the thickness of end-plate. Finally, the knowledge gaps in the research of fire resistance of steel structure beam-column joints are analyzed, and the key issues worthy of attention in the future are put forward for reference.
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