CFRP与钢板复合加固混凝土梁斜截面试验研究  

Experimental Research on Shear Capacity of RC Beams Combination Strengthened With CFRP and Steel Plate

作　　者：卢亦焱[1] 张号军[1] 石志龙[1] 

机构地区：[1]武汉大学土木建筑工程学院,湖北武汉430072

出　　处：《重庆建筑大学学报》2007年第4期55-59,共5页Journal of Chongqing Jianzhu University

基　　金：湖北省重点科学技术发展计划(20001P2104);中国博士后科学基金(2002031147);湖北省青年杰出人才基金(2004ABB014)

摘　　要：通过14根被加固钢筋混凝土梁的斜截面承载力试验,研究了碳纤维布和钢板以及两者复合加固后混凝土梁的破坏特征、受力性能和破坏机理,并对不同加固方法、剪跨比、加固片材的名义"配箍率"及粘贴锚固方式下的斜截面加固效果进行了分析。试验结果表明,碳纤维布与钢板复合加固可以大大提高混凝土梁的抗剪承载力,并使得梁的整体刚度和变形能力也得到提高;相对于碳纤维布加固,复合加固增大了梁破坏时碳纤维布的利用率;梁的剪跨比越大,其复合加固后承载力提高越明显,延性越好;对于粘贴锚固方式,U型锚固比两侧面粘贴加固效果好,45°粘贴比90°粘贴加固效果好;提高碳纤维布以及钢板的名义"配箍率"可以提高被加固梁的抗剪承载力。研究成果可为实际工程应用提供参考。The experimental research on the shear resistance of RC beams combination strengthened with Carbon Fiber Reinforced Polymer （CFRP） and steel plate was conducted. The failure types, performing characteristics and failure mechanism of the specimens were investigated. The influence of different strengthening methods, shear-span ratio, the ratio of CFRP and steel plates and bond methods on strengthening effectiveness was analyzed. The results show that the combined strengthening method can increase the shear resistance greatly, and the rigidity and the deformability also increase. Compared to strengthening with CFRP, the combination strengthening method increases the utilization ratio. The shear resistance and the ductility increase with the shear-span ratio. The strengthening effectiveness of the U-form anchorage is better than that of the double-sided bond and the 45° bond＇s is better than the 90° bond＇s. Increasing the ratio of CFRP or steel plates can improve the shear resistance of the specimens. It can provide a reference for engineering application.

关 键 词：碳纤维布 钢板 复合加固 混凝土梁 抗剪承载力 试验研究 

分 类 号：TU375.1[建筑科学—结构工程]