预应力CFRP片材加固RC梁荷载-挠度分析  

LOAD-CAPACITY ANALYSIS OF RC BEAMS STRENTHENED WITH PRESTRESS CFRP LAMINATE

作　　者：王兴国[1] 郭大州[2] 李力[1] 周朝阳[3] 

机构地区：[1]河南理工大学土木工程学院,河南焦作454003 [2]河南理工大学高职学院,河南焦作454003 [3]中南大学土木建筑学院,湖南长沙410075

出　　处：《玻璃钢／复合材料》2010年第3期7-11,共5页Fiber Reinforced Plastics/Composites

基　　金：河南省重点科技攻关(082102240009);河南省教育厅项目(2008A560004);河南理工大学博士基金(648258);校青年骨干教师计划(2008-23;648111)

摘　　要：在已有混凝土梁外贴预应力碳纤维增强聚合物(Carbon Fiber-Reinforced Polymer,简称CFRP)片材加固试验研究基础之上,基于平截面、界面无滑移等假定,考虑了CFRP片材端部有、无机械锚固及有、无初始荷载持续作用等情况,建立了预应力纤维片材加固混凝土梁的全过程分析方法,编制了相应程序,比对了实验梁的荷载-挠度实测曲线与计算曲线,吻合较好。其中,弯曲破坏的试验梁屈服荷载计算值与试验值误差平均值为3.88%,计算值与试验值比值的平均值为1.039,变异系数为0.027;极限承载力计算值与试验值误差平均值为5.3%,计算值与试验值比值的平均值为1.054,变异系数为0.04,从而也说明了分析过程的正确性。Experimental study of RC members strenthened with pretressed CFRP laminate has been extensively employed.Based on the assumptions of plane section remaining,non-slip on interface and stress-strain relationships of materials,flexural behavior of the whole course is analyzed from initial load,pretension release to failure for concrete beam.The program is verified its applicability by comparison of the calculated results with the experimental ones,which the mean value and variation coefficient of the ratio is 1.039/0.027 for yield load,and 1.054/0.04 for ultimate load capacity.It is showed by good agreement of the analytical results with the measured value.

关 键 词：桥梁工程 预应力 加固 FRP片材 非线性分析 

分 类 号：TU375.1[建筑科学—结构工程]