摘要
对钢筋混凝土简支梁进行了常温下和火灾作用后动力性能试验研究,并对常温下和火灾作用后动力性能试验研究结果进行对比分析.试验研究结果表明,受火损伤后钢筋混凝土简支梁的一阶固有频率和刚度与常温时相比有明显下降,下降幅度为30%～40%之间.根据试验研究的结果,总结出了其动力性能的变化规律,为火灾后结构的损伤鉴定及加固修复提供重要依据.
Experiment research on the dynamic performance of simple Reinforced Concrete （RC） beams before fire and after fire is presented, and the results of the experiment research before and after fire are analyzed. The dynamic experiment results indicate that first inherent frequency and stiffness of the simple RC beams will reduce obviously after fire, and the range of the decline is about 30-40%. According to the result of the experiment research, this paper summarizes the variational rules of the dynamical performance, and they lay the foundation for the identification and strengthening of damaged structures.
出处
《武汉化工学院学报》
2005年第4期27-29,92,共4页
Journal of Wuhan Institute of Chemical Technology
基金
国家十五科技攻关项目(2002BA806B03-1)
关键词
火灾
固有频率
动力性能
刚度
fire
inherent frequency
dynamical performance
stiffness
