碳纤维布加固钢结构的黏结性能研究  

Study on the bond behavior of CFRP sheets to steel

作　　者：杨勇新[1] 岳清瑞[1] 彭福明[1] 

机构地区：[1]中冶集团建筑研究总院,北京100088

出　　处：《土木工程学报》2006年第10期1-5,18,共6页China Civil Engineering Journal

基　　金：2005年度国家攻关计划(国际合作)(2005DFBA0002);国家863计划(2001AA336010);国家自然科学基金(50238030)

摘　　要：与传统的钢结构加固方法相比,粘贴碳纤维布加固钢结构具有很大的优势和应用前景,如不会导致严重的应力集中、不会产生残余应力、施工方便、维护费用低等。碳纤维布与钢结构之间的黏结性能直接影响加固效果,但是目前国内对这方面的研究还未涉足。本文对粘贴碳纤维布加固钢板进行了静力拉伸试验,采用高强型和高模型碳纤维布及不同的端部锚固措施,考察了未损伤钢板和损伤钢板加固后的效果。得到了加固试件的屈服荷载和极限荷载,并对不同的破坏形式进行了分析。试验结果表明,粘贴碳纤维布加固能明显提高钢构件的屈服荷载。测量了碳纤维布的应变分布,得到了碳纤维布与钢板之间的黏结应力分布和碳纤维布的有效黏结长度,并与理论公式的计算结果进行了对比,二者吻合较好。There are several advantages in bonding carbon fiber sheets adhesively on deteriorated steel members than the traditional repair methods, such as, no stress concentrations, no residual stress, easy to construct and low maintenance cost. The bond behavior between carbon fiber sheets and steel affects the effectiveness of strengthening, but research on this subject is still lacking in China. Tensile tests of steel plates repaired with carbon fiber sheets were conducted. Different carbon fiber sheets and anchorage methods were adopted. The yielding loads and ultimate loads of the repaired specimens were measured. Failure modes of the specimens were analyzed. Tests results indicated that the yielding load of the repaired specimens increased obviously. The tensile strains of the carbon fiber sheets were measured. The bond stress distribution between the carbon fiber sheets and the steel plates and the effective bond length of the carbon fiber sheets were obtained. The calculation results were in good agreement with the experimental data.

关 键 词：碳纤维布 拉伸应变 黏结应力 有效黏结长度 

分 类 号：TU31[建筑科学—结构工程]