FRP片材加固混凝土连续梁试验研究  

Experimental Study on Continuous RC Beams Strengthened With FRP Laminates

作　　者：曹国辉[1] 方志[1] 吴继峰[2] 

机构地区：[1]湖南大学土木工程学院,长沙410082 [2]湖南城市学院土木工程学院,益阳413000

出　　处：《建筑结构》2005年第10期63-66,共4页Building Structure

基　　金：益阳市科研计划项目;湖南城市学院科研计划项目

摘　　要：对用不同类型纤维布加固的11根钢筋混凝土连续梁在不同加载历史条件下进行了破坏试验。试验结果表明,粘贴CFRP布和GFRP布加固后梁的正截面承载力有不同程度的提高,裂缝宽度减小,抗弯刚度有所增强。粘贴纤维布加固的钢筋混凝土梁承载力和加固时的初始应力水平有关,初始应力越高,加固梁的极限承载力就越低。粘贴纤维布后,混凝土梁的延性有一定的降低,相对于碳纤维布加固的钢筋混凝土梁,粘贴玻璃纤维布混凝土梁的延性较好,连续梁支座塑性转动能力较好。The 11 continuous RC beams strengthened with different FRP are tested under different load history. The results show that the flexural strength, stiffness and anti-crack behavior of the strengthened RC beams are improved. The ultimate load capacity of RC beams strengthened with FRP laminates is related with the initial stress level, and reduces with the increasing of the initial stress level. The ductility of FRP strengthening beams is somewhat lower comparing with RC beams. The ductility of GFRP strengthening beams is better than CFRP strengthening beams, and the negative bending regions of continuous beams have sufficient plastic rotation ability.

关 键 词：碳纤维 玻璃纤维 连续梁 加固 二次受力 钢筋混凝土连续梁 试验研究 加固梁 FRP片材 钢筋混凝土梁 

分 类 号：TU375.1[建筑科学—结构工程] TU599