建筑结构学报2026，Vol.47Issue(8)：172-183,12.DOI:10.14006/j.jzjgxb.2025.0305
足尺混凝土偏压柱受火喷水冷却后受力性能试验研究
Experimental study on mechanical behavior of full-scale eccentrically loaded RC columns after fire water spray cooling
摘要
Abstract
To investigate the effect of fire exposure duration and cooling methods on the mechanical performance of full-scale eccentrically loaded reinforced concrete columns,seven specimens were subjected to controlled fire exposure,followed by water cooling,natural cooling,and static loading tests.The sectional temperature,failure modes,deflection,strain behavior,and residual bearing capacity were systematically analyzed.The results indicate that prolonged fire exposure results in increased cracking,greater deformation,and reductions in residual capacity,with decreases of up to 27.6％and 36.8％observed after 60 and 120 minutes of fire exposure,respectively.Compared to natural cooling,water-spray cooling significantly alters the internal temperature distribution,as evidenced by the distinct color variation near the water-spray cooling area.Additionally,water-spray cooling exacerbates the propagation of transverse cracks.Increased water-spray cooling surface area further reduce the residual capacity.Moreover,extended fire duration and different cooling modes cause a shift in failure modes from large-eccentricity failure to small-eccentricity failure.Based on the experimental data,the GB/T 50010-2010 formula for the eccentric bearing capacity of concrete columns was revised by considering fire duration and cooling modes,and the calculated results show good accuracy.关键词
钢筋混凝土偏压柱/限时受火试验/喷水冷却/静力性能/破坏模式/残余承载力Key words
eccentrically load RC column/fire-duration test/water spray cooling/mechanical performance/failure mode/residual bearing capacity分类
建筑与水利引用本文复制引用
苗吉军,董政,欧阳瑾,刘延春,刘才玮,薛伟辰,余倩倩,姜柯旺..足尺混凝土偏压柱受火喷水冷却后受力性能试验研究[J].建筑结构学报,2026,47(8):172-183,12.基金项目
"一带一路"创新人才交流项目(DL2023025001L),国家自然科学基金项目(52178487). （DL2023025001L）
