建筑结构学报2012，Vol.33Issue(2)：50-55,6.
HRBF500级钢筋混凝土梁受火后力学性能试验研究
Experimental research on mechanical properties of HRBF500 concrete beam after fire
摘要
Abstract
This paper conducts an experimental study on the mechanical properties of the fine grain reinforced concrete beam with HRBF500 at normal temperatures and after fire. The experiments of five fine grain reinforced concrete beams under fire with different time were accomplished. The static loading test was done when the beams were cooled to room temperature naturally. Its macroscopical phenomenon and the static failure modes were investigated through the tests. Hence, the variation of the bearing capacity of the fine grain reinforced concrete beams by the fire was obtained under different conditions. The tests of two fine grain reinforced concrete beams under loads without fire were carried out. The load-deflection curves were obtained and compared with the results after fire. The results show that the concrete beams can be seriously damaged by fire. The effects of the time of fire, bar ratio and preloading on the fire resistance are revealed. Some conclusions are drawn： The longer it is exposed to fire, the weaker its residual bearing capacity is. The smaller the bar ratio is, the weaker its residual bearing capacity is; A preloading will reduce the residual bearing capacity of the fine grain reinforced concrete beam.关键词
细晶粒钢筋/受火时间/受火试验/剩余承载力Key words
hot rolled bars of fine grains/time of fire/fire test/residual bearing capacity分类
建筑与水利引用本文复制引用
王全凤,邱毅,徐玉野,王凌云,陈凡..HRBF500级钢筋混凝土梁受火后力学性能试验研究[J].建筑结构学报,2012,33(2):50-55,6.基金项目
国家高技术研究发展计划（863）项目（2007AA032550）,福建省青年科技人才创新项目（2007F3064）. （）
