单层单跨钢框架抗火性能的试验研究

本文对2榀H型钢单层单跨钢框架进行抗火性能的试验研究。试验采用足尺试件,钢梁长3400mm,钢柱高3200mm,混凝土板宽1000mm。试验中考虑不同受火工况对钢框架抗火性能的影响。通过试验得出了梁、板、柱温度场变化规律和钢框架变形情况。试验结果表明:火灾下,由于钢筋混凝土板的存在,钢梁沿截面高度各点温度不一致,即钢梁沿截面高度存在温度变化的温度场;梁柱全部受火的单层单跨钢框架(节点受到保护)破坏方式为钢柱压屈破坏,破坏位置在受到保护的钢节点下部的钢柱上。本文研究结果为今后钢结构抗火性能的进一步研究提供参考数据。

Experimental study on fire-proof behavior of one-story,one-bay steel frame

This paper studies the performance of two full-scale one-story,one-bay H-section steel frames in fire.3400mm-long steel beams,3200mm-long steel columns and 1000mm-wide concrete slabs are used in the experiment.Fire condition which may have influence on the performance of H-section steel frames in fire is examined.Based on the test results,the regularities of temperature field of steel beams,concrete slabs and steel columns and deflection of steel frames are presented.The test results reveal that temperature differs at the section of steel beams because of the concrete slabs.Compressive buckling is located in the steel columns below the protected steel joint when both steel beams and steel columns are in fire.Conclusion of this paper may provides a reference for further research of fire-proof behavior of steel structures.