摘要
为分析研究火灾对钢筋混凝土柱振动频率的影响,通过火灾后钢筋混凝土柱材料力学性能的改变,建立与振动频率的关系,推导了钢筋混凝土柱振动频率与受火时间的关系式。并设计制作了2根钢筋混凝土柱,分别在受火前后进行动力试验,测量前两阶频率,分析数据变化。结果表明,钢筋混凝土柱受火后一阶和二阶振动频率均出现明显降低,与推导的关系式相适应。
In order to analyze the influence of fire on the vibration frequency of reinforced concrete column,the relationship between the vibration frequency and the time of fire was deduced by changing the mechanical properties of the reinforced concrete column material after fire and establishing the relation with the vibration frequency.2 reinforced concrete columns were designed and made,respectively,before and after the fire,the dynamic tests were carried out,the first two-order frequencies were measured and the data changes were analyzed.The results show that the first-order and second-order vibration frequencies of reinforced concrete columns are reduced obviously,which is suitable for the deduced relationship.
作者
高立堂
刘伟
宋来运
张洪正
GAO Li-tang;LIU Wei;SONG Lai-yun;ZHANG Hong-zheng(School of Civil Engineering,Qingdao University of Technology,Qingdao 266033,China)
出处
《科学技术与工程》
北大核心
2018年第30期201-205,共5页
Science Technology and Engineering
关键词
高温
弹性模量
刚度
频率
high temperature
elastic modulus
stiffness
frequency