摘要
钢框架梁柱连接节点的高温力学性能是影响火灾下钢框架结构抗连续倒塌性能的关键因素之一。基于组件法,将栓焊节点分解为翼缘拉压组件、连接板螺栓孔承压组件、螺栓受剪组件、梁腹板螺栓孔承压组件和螺栓滑移组件等基本组件,并分别对各组件的等效弹簧力学模型开展理论推导,最终建立了栓焊节点高温组件模型。基于已开展的栓焊节点抗火试验,构建了节点整体受力分析杆系模型,并通过对比有限元结果和试验结果,验证了组件模型的有效性和准确性。研究结果表明:文中提出的栓焊节点高温组件模型可以较好地预测高温下钢框架梁柱连接节点的受力性能和行为反应。
The high-temperature mechanical property of steel frame beam-column connection joints is one of the key factors affecting the progressive collapse resistant performance of steel frame structures under fire.Based on the component method,the welded flange-bolted web joint was decomposed into basic components such as the tension and compression components of flanges,compression components of bolt holes in connection plate,shear components of bolts,compression components of bolt holes in beam web,and slip components of bolts.The mechanical model of equivalent spring for each component was theoretically derived,and the high-temperature component model for welded flange-bolted web joint was ultimately established.Based on the fire tests of welded flange-bolted web joints that have been conducted,a member system model for the overall force analysis of the joints was constructed,and the effectiveness and accuracy of the component model were verified by comparing the finite element results with the experimental results.The research results indicate that the high-temperature component model of welded flangebolted web joints proposed in this paper can effectively predict the mechanical performance and behavioral response of steel frame beam-column connection joints under high temperatures.
作者
李永梅
丁润民
刘美景
范圣刚
LI Yongmei;DING Runmin;LIU Meijing;FAN Shenggang(School of Mechanical and Electrical Engineering,Southeast University Chengxian College,Nanjing 210031,China;College of Civil Engineering,Southeast University,Nanjing 211189,China;School of Civil and Transportation Engineering,Southeast University Chengxian College,Nanjing 210031,China)
出处
《建筑钢结构进展》
北大核心
2025年第11期110-117,共8页
Progress in Steel Building Structures
基金
国家自然科学基金(52278153)
东南大学成贤学院国家级科研项目培育基金(2022NCF005)。
关键词
钢框架
抗连续倒塌性能
组件法
栓焊节点
高温力学性能
抗火试验
组件模型
steel frame
progressive collapse resistant performance
component method
welded flange-bolted web joint
hightemperature mechanical property
fire test
component model
