摘要
通过对4根缩尺钢筋混凝土约束梁三面受火的火灾实验,获得高温作用下的构件温度场分布,在构件常温冷却后进行了静力加载实验,并对不同火灾损伤级别的构件进行了极限承载力和刚度对比分析。结果表明,火灾损伤后钢筋混凝土约束梁承载力降低程度不大,但刚度有较大降低。文中的研究结果可为钢筋混凝土梁受火损伤后加固设计提供依据。
Based on the results of simulation text that four reduced scale constrained beams under fire on three surfaces,the temperature distribution under fire in different section was obtained.Though the static loading text after room-temperature cooling,the ultimate bearing capacity and the stiffness of the beams were compared.The experimental results and analysis show that after fire simulation,the loss of bearing capacity is not significant,but the stiffness is large lower than before.The findings of this article can provide the basis for reinforcement design of reinforced concrete beam which is damaged by fire.
出处
《武汉理工大学学报》
CAS
CSCD
北大核心
2012年第12期108-112,共5页
Journal of Wuhan University of Technology
基金
国家"十一五"科技支撑计划(2006BAJ03A03-13)
关键词
钢筋混凝土约束梁
火灾损伤
极限承载力
刚度
reinforced concrete restrained beams
fire damage
ultimate bearing capacity
stiffness
