(1 西安建筑科技大学 710055；  2 青岛理工大学，266033； 3 山东省建设厅，济南 250001)
［提要］对3根H型截面钢柱进行了火灾行为的试验研究。采用足尺试验形式，柱长3 300mm，钢柱在试验过程中限制轴向变形。通过试验得出了钢柱在火灾下的侧向变形情况，结果证明限制轴向变形对钢柱火灾行为产生明显的影响。试验结果为今后钢结构火灾行为研究提供了依据。
［关键词］钢结构 火灾 H型截面 钢柱 侧向变形
Anti fire Experimental Research on H Section Steel Columns/Li Xiaodong１,2,Dong Yuli1,2,3,Lü Junli２(1 Xi'an University of Architecture & Technology,Xi'an 710055,China; 2 Qingdao Technology University 266033 Qingdao,China; 3 Shandong Construction Bueeru,Jinan 250001,China)
Abstract:The behaviours of three H section steel columns under fire are investigated.All the columns are full scale with 3 300mm length under axial restraint.From the test results,the regularities of lateral deflection are presented.The results of the experiment show that the behaviours of steel columns under fire are influenced by restrained thermal elongation.Conclusion of the study provides a basis for further research to explore fire behaviours of steel structures.
Keywords:steel structure; fire; H section; steel column; lateral deflection

*国家重点基础研究专项经费(973项目)(2001CB409603)；国家自然科学基金重大国际合作研究项目(50320120156)；山东省优秀中青年科学家科研奖励基金资助项目。