竖向集中荷载作用下联合加固混凝土连续梁试验研究*
- 摘 要
-
（1 吉林建筑大学土木工程学院，长春 130118；2 悉地国际设计顾问(深圳)有限公司，深圳 518057）［摘要］由于桥梁结构受力情况比较复杂，单一采用一种加固方式往往不能满足结构安全的要求。采用体外预应力筋加固受到一定的局限，研究利用碳纤维布与预应力筋联合加固混凝土连续梁结构。加固混凝土连续梁时，首先施加体外预应力，然后再粘贴碳纤维布，针对两种方法联合加固的混凝土连续梁进行试验研究。研究结果表明，联合加固混凝土连续梁在受力阶段表现出更好的变形性能，加固提高了梁的承载能力。［关键词］联合加固; 体外预应力; 碳纤维布; 连续梁; 静载试验中图分类号：TU378.2 文献标识码：A 文章编号：1002-848X(2014)23-0094-03Experimental study on combined reinforcement concrete continuous beam under the vertical concentrated loadZhong Chunling1, Ye Zeng1,2(1 College of Civil Engineering, Jilin Jianzhu University, Changchun 130118, China; 2 CCDI International(Shenzhen)Design Consultants Co., Ltd., Shenzhen 518057, China)Abstract: Considering complicated load conditions of the bridge structure, only one reinforcement method can not meet the safety and the reinforced method of external pre-stressed tendon has limits. Combined reinforcement method of carbon fiber sheet and pre-stressed tendon to reinforce the concrete continuous beam structure was proposed. When reinforcment concrete continuous beam, external pre-stressed force was exerted first, and then carbon fiber sheet was stuck. Experimental study was carried out on the combined reinforcement concrete continuous beam. Result indicates that combined reinforcement continuous beam shows the well ability of deformation at the stress stage and the bearing capacity of the concrete continuous beam improves.Keywords: combined reinforcement; external pre-stress; carbon fiber sheet; continuous beam; static load test*吉林省科技发展计划项目（201105066）。作者简介：钟春玲，博士，教授， Email：zhongchunling11@sina.com。参考文献［1］高亮.浅议碳纤维加固混凝土梁的试验［J］.科技信息,2011(22): 761-763.［2］谭军.碳纤维布加固预应力混凝土梁抗弯性能试验与分析［D］.哈尔滨：哈尔滨工业大学，2008.［3］SAS G, CAROLIN A. A Model for predicting the shear bearing capacity of FRPstrengthened beams［J］. Mechanics of Composite Materials, 2008，44（3）: 245-256.［4］赵益鹏.CFRP及钢绞线体外预应力混凝土梁的试验研究［D］.北京：北京交通大学，2007.［5］张云龙.体外预应力组合梁受弯全过程试验分析［J］.工程与试验，2008，48(4): 13-14.［6］杨勇新，李庆伟，岳清瑞.预应力碳纤维布加固混凝土梁预应力损失试验研究［J］.工业建筑，2006，36(4): 5-18.
