(1 山东科技大学土建学院，青岛 266510； 2东南大学土木学院，南京 210096；3 青岛理工大学土木学院，青岛 266033)
［摘要］对4个H型钢梁试件进行了火灾试验研究。H型钢梁端部采用柔性连接的梁柱节点形式，探讨了H型钢梁在火灾作用下的变形、温度内力和梁的外表面温度分布，并给出了荷载和跨度对采用柔性连接节点形式的H型钢梁抗火性能的影响。为柔性连接钢梁火灾行为的理论研究提供了依据。
［关键词］火灾；柔性连接钢梁；温度内力；温度分布
Experimental study on behaviors of steel beams with flexible connections
under fireCong Shuping1,2, Dong Yuli3, Liang Shuting2(1 College of Civil Engineering,Shandong University of Science and Technology,Qingdao 266510,China;2 College of Civil Engineering, Southeast University, Nanjing 210096, China； 3 College of Civil Engineering,Qingdao Technology University, Qingdao 266033,China)
Abstract:In order to investigate the structural characteristics of H-haped steel beams under fire, an experimental research which consisted 4 specimens had been carried out. Beamcolumn joints of the H-shaped steel beams are flexible connections. The deformation, axial force owing to thermal effects and temperature distribution of steel beams′ surface are presented, and the effects of different load and span on the behaviors of Hshaped steel beams with flexible connections are also given. Results provide a basis for the theoretical research of steel beams with flexible connections.
Keywords:fire; steel beams with web-cleat connections; axial force owing to thermal effects; temperature distribution
*国家重点基础发展规划项目(2001CB409600)子课题；国家自然科学基金委国际合作重大项目(2003-0320120156)；山东省科技厅、青岛市科技局项目。作者简介：丛术平，博士，讲师，Email:congshp@163.com。
参考文献
［1］ECCS.European Recommendations for the Fire Safety of Steel Structures［S］. 1983.
［2］LIUTCH, FAHAD MK, DAVIES JM. Experimental investigation of behavior of axially restrained beams in fire［J］. Journal of Constructional Steel Research, 2002，58.
［3］LIUTCH. Fire resistance of unprotected steel beams with moment connections［J］. Journal of Constructional Steel Research, 1999，51.
［4］李国强，贺军利，蒋首超. 约束钢梁的抗火试验与验算［J］. 土木工程学报, 2000,34(4).
［5］李国强，蒋首超，林桂祥. 钢结构抗火计算与设计［M］. 北京：中国建筑工业出版社, 1999.
［6］陈绍蕃. 钢结构设计原理［M］.北京：科学出版社, 2001.
［7］GB9978—88建筑构件耐火试验方法［S］.