| 钢框架中柱刚节点抗火性能试验研究 |
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| 引用本文： | 隋炳强,董毓利,王卫永,王彦超.钢框架中柱刚节点抗火性能试验研究[J].东南大学学报(自然科学版),2007,37(4):651-655. |
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| 作者姓名： | 隋炳强 董毓利 王卫永 王彦超 |
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| 作者单位： | 1. 同济大学建筑工程系,上海,200092
2. 哈尔滨工业大学土木工程学院,哈尔滨,150090 |
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| 基金项目： | 国家重点基础研究发展计划(973计划)，国家自然科学基金国际合作重大研究项目，山东省优秀中青年科学家科研奖励基金 |
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| 摘 要： | 对栓焊和全焊4个中节点足尺试件进行了抗火试验研究和有限元分析.火灾试验采用恒载升温的模式,让节点单独受火,主要对节点的耐火时间、临界温度和极限转角进行了研究.试验表明:刚性节点耐火时间较短,一般能持续20 min左右;柱腹板设加劲肋可明显提高节点临界温度和极限转角;全焊节点抗火临界温度略高于栓焊节点,二者破坏时的极限转角相差不大.用有限元软件ANSYS 8.0对刚性连接的抗火性能进行了理论分析,得到的结果和试验基本一致.最后,根据试验和有限元分析的结果,对节点的抗火设计和施工提出了建议.
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| 关 键 词： | 火灾试验 钢结构 刚性节点 有限元 |
| 文章编号： | 1001-0505（2007）04-0651-05 |
| 修稿时间： | 2006-10-08 |
Experimental study of the fire resistance of inner rigid beam-column joints in steel frames |
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| Sui Bingqiang,Dong Yuli,Wang Weiyong,Wang Yanchao.Experimental study of the fire resistance of inner rigid beam-column joints in steel frames[J].Journal of Southeast University(Natural Science Edition),2007,37(4):651-655. |
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| Authors: | Sui Bingqiang Dong Yuli Wang Weiyong Wang Yanchao |
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| Institution: | 1.Depaxtment of Building Engineering, Tongji University, Shanghai 200092, China;2.College of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China |
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| Abstract: | In order to study the fire-resistance of rigid joints in steel frames, four full-scale intermediate joints were tested and studied with 3D nonlinear finite element analysis software.In the experiment,the load value kept constant and only joints were exposed to fire to increase their temperature.The fire-resistance,critical temperature value and ultimate rotation of the joints were mainly investigated.The test results show that the fire-resistant time of rigid joints is short,being about twenty minutes in general.The column stiffeners can obviously improve both the critical temperature value and the ultimate rotation of the joints.The fire-resistance of welded connection is a little higher than that of bolted-and-welded joints,but there is no significant difference of ultimate rotation between them when failure occurs.The fire-resistance analysis of rigid joints was also made by employing the software package of ANSYS and the results agree well with the experimental ones.Suggestions on design and construction are also presented. |
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| Keywords: | fire test steel structures rigid joints finite element |
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