预应力CFRP布加固RC梁动力特性的试验研究  

Experimental study on dynamic characteristics of RC beam strengthened by pre-stressed CFRP sheets

作　　者：陆耀清[1] 艾军[1] 钱江[1] 杨杰[1] 徐春林[1] 

机构地区：[1]南京航空航天大学土木工程系,南京210016

出　　处：《振动与冲击》2010年第8期128-130,共3页Journal of Vibration and Shock

基　　金：浙江省交通厅科研项目(编号2008H01)

摘　　要：进行了预应力CFRP布加固完好RC梁的动力特性试验,结果表明:预应力加固梁的固有频率随着预张力的增加而增加。同时,考虑了相关的影响因素,从理论上推导了预张力与加固梁固有频率之间的定量关系,再利用一阶频率的试验值对公式进行拟合,得到频率影响系数。而后将二阶频率的试验值与理论值进行比较,发现理论值基本能反映频率随预张力的变化趋势,两者最大误差为0.173(在预张力为0kN时),试验值与理论值吻合较好。Tests on dynamic characteristics of good RC beam strengthened by pre-stressed CFRP sheets were carried out.The results indicate that the eigen frequency of the beam increases with the increase of pretension.The relationship between eigen frequency and pretension was derived theoretically,considering some interrelated factors.The frequency influential factor was obtained by curve fitting with the experimental value of first order frequency.The theoretical value of second-order frequency was compared with the experimental value,and it is shown the theoretical calculation results can reflect the trend of experimental data.When the pretension is 0KN,the maximum error between them is 0.173,they are in good agreement.

关 键 词：预应力CFRP布 加固 RC梁 频率 

分 类 号：TU317[建筑科学—结构工程] TU375.1