新型CFRP抗弯加固方法的试验研究  

Experiment Research on New Method of Flexural Strengthened with CFRP

作　　者：石昌文[1] 何化南[1] 董海[1] 吴智敏[1] 

机构地区：[1]大连理工大学海岸和近海工程国家重点实验室,辽宁大连116024

出　　处：《建筑科学与工程学报》2011年第1期76-82,共7页Journal of Architecture and Civil Engineering

基　　金："十一五"国家科技支撑计划项目(2006BAJ03A03-09);国家自然科学基金项目(50578025)

摘　　要：为了解决外贴碳纤维增强复合材料(CFRP)加固法中加固构件因发生CFRP布剥离而使加固失效的问题,提出了一种新的端部锚固方法,即将CFRP布两端缠绕在铁片上,然后用螺栓把铁片固定于混凝土梁的支座处;对采用该方法加固的钢筋混凝土梁进行了三点弯曲试验。结果表明:这种端部锚固方法可以延缓CFRP布的剥离,即使CFRP布在跨中剥离仍可与梁共同受力,直至CFRP布拉断,从而有效地提高CFRP的利用率;此外,加固梁表现出良好的延性破坏特征。The concrete members strengthened by external bonded carbon fiber reinforced polymer（CFRP） technique tended to fail by CFRP sheet debonding.In order to solve the problem,authors proposed a new end anchorage method,which made the end of CFRP wrapped in a steel plate,and fixed the steel plate on the reinforced concrete（RC） beam near the support pillar with bolts.Three-point bending tests were carried out on RC beams strengthened by the new end anchorage technique.The results show that this approach can delay the debonding of CFRP,which means even if CFRP debonds in the mid-span,the CFRP and RC beam can still be together by force,and improve the CFRP effect accodingly.Furthermore,the strengthened beams have good ductile failure characteristics.

关 键 词：CFRP 端部锚固 混凝土 延性破坏 

分 类 号：TU374[建筑科学—结构工程]