预应力碳纤维布加固损伤钢筋混凝土梁抗弯性能研究  

Study on Flexural Performance of Reinforced Concrete Beam Strengthened by Prestressed CFRP

作　　者：苏有文[1] 詹妮[1] 李超飞[1] 马倩雯[1] 寥周先 张军 

机构地区：[1]西南科技大学土木工程与建筑学院,四川绵阳621000 [2]绵阳市华烨建设有限公司,四川绵阳621000

出　　处：《施工技术》2014年第4期1-4,共4页Construction Technology

基　　金：国家863计划项目(2009AA032304);四川省支撑计划项目(2011GZ0250)

摘　　要：为了研究预应力碳纤维布加固损伤钢筋混凝土梁的抗弯性能,通过对1根普通梁、1根直接粘贴碳纤维布加固梁、1根直接粘贴预应力碳纤维布加固梁、2根加载至裂荷载后分别进行碳纤维布加固和预应力加固梁的抗弯性能试验研究,分析碳纤维布、预应力碳纤维布加固对钢筋混凝土梁抗弯性能的影响。试验结果证明,在梁加载至裂荷载后再进行碳纤维布加固对梁的承载力、抗弯刚度、碳纤维布应变/利用率、抑制裂缝增长提高更为明显。In order to study on the flexural performance of the reinforced concrete beam strengthened by CFRP,the authors make an experimental research on anti-bending performance of one ordinary beams, one reinforcement concrete beam sticked with carbon fiber cloth,one reinforcement beam sticked with prestressed CFRP,two carbon fiber cloth reinforcement and prestressed reinforcement beams from loading to crack loading. The authors analyze the effect of carbon fiber cloth,prestressed CFRP reinforcement on the flexural performance of reinforced concrete beam. Experiment results indicate that strengthening with CFRP from beam load to the crack load is a sensible approach. It can improve the bearing capacity, flexural stiffness,strain rate and use ratio of carbon fiber cloth,and it can also inhibit the growth of the crack obviously.

关 键 词：加固 预应力碳纤维布 梁 裂缝 抗弯性能 

分 类 号：TU375.1[建筑科学—结构工程]