节点处梁侧粘贴纤维片材抗弯加固性能研究  

Study on flexural behavior of RC beams strengthened with side-bonded CFRP laminates at beam-column joint

作　　者：李贵炳[1] 郭玉刚[1] 王来立 

机构地区：[1]山东工商学院,烟台264005 [2]烟台工程职业技术学院,烟台264000

出　　处：《建筑结构》2010年第S1期343-346,共4页Building Structure

基　　金：住房和城乡建设部研究开发项目(2009-K2-39)

摘　　要：为了研究梁柱节点处梁的负弯矩区采用CFRP片材加固后的抗弯性能,进行了3根梁侧粘贴碳纤维片材加固梁和1根对比梁的抗弯试验。试验参数包括:CFRP层数、CFRP布置形式和节点处CFRP片材的锚固方式。试验结果表明:梁侧粘贴CFRP片材加固钢筋混凝土梁也同样可以提高梁的抗弯承载力;梁的弹性工作阶段明显延长,开裂荷载有很大提高;梁侧粘贴CFRP片材对控制裂缝宽度具有明显的作用。梁侧粘贴纤维片材的加固方法对裂缝宽度和变形要求严格的钢筋混凝土构件提供了一条有效的途径。It was have been manifested that externally bonded CFRP laminates to the soffit of RC beam was an effective method to improve its flexural strength.However,there was little research on the flexural strengthening of RC beams at beam-column joint or the negative moment region of continuous beam.To investigate its flexural behavior of the beam at beam-column joint after CFRP-strengthening,a total of 7 cantilever beams were tested,including 3 strengthened beams and 1 control beam.The test variables included: number of ply of CFRP laminates,configuration of CFRP laminates and anchoring method used to anchor CFRP laminates at the beam-column joint.The test result shows that: similar to the soffit bonding,side-bonding CFRP laminates can also improve flexural behavior of the strengthened beams,especially the elastic stage of the strengthened beam was elongated and the cracking load improved significantly;the crack width was reduced remarkably due to the side-bonding of CFRP laminates.This strengthening method is a good way for RC beams to control its crack width and deflection.

关 键 词：节点 梁侧 CFRP 加固 抗弯性能 

分 类 号：TU375.1[建筑科学—结构工程]