碳纤维布加固钢筋混凝土梁裂缝性能分析  

ANALYSIS ON CRACK PERFORMANCE OF REINFORCED CONCRETE BEAMS STRENGTHENED WITH CFRP SHEETS

作　　者：马洪伟[1,2] 王梓鉴 王宏军 赵颖 王选 MA Hongwei;WANG Zijian;WANG Hongjun;ZHAO Ying;WANG Xuan(School of Civil Science & Engineering, Yangzhou University, Jiangsu Yangzhou 225127, China;Jiangsu Hanjian Group Co., Ltd., Jiangsu Yangzhou 225000, China;Yangzhou Construction Safety Supervision Station, Jiangsu Yangzhou 225009, China)

机构地区：[1]扬州大学建筑科学与工程学院,江苏扬州225127 [2]江苏邗建集团有限公司,江苏扬州225000 [3]扬州市建筑安全监察站,江苏扬州225009

出　　处：《低温建筑技术》2019年第1期19-23,共5页Low Temperature Architecture Technology

基　　金：国家自然基金资助项目(51508495)

摘　　要：为了研究钢筋混凝土梁的裂缝扩展规律以及碳纤维布加固对裂缝扩展的影响,建立加固前与加固后钢筋混凝土梁的三维有限元分析模型。对钢筋混凝土梁以及碳纤维布进行受力分析,研究碳纤维布加固对钢筋混凝土梁受力性能与裂缝扩展的影响。结果表明,碳纤维布加固能提高钢筋混凝土梁的受弯承载能力,粘贴一层碳纤维布钢筋混凝土梁的承载力提高了3.4%,粘贴两层碳纤维布的钢筋混凝土梁的承载力提高了6.5%,并能够延缓和抑制裂缝的发展。文中研究结果为今后优化钢筋混凝土梁加固方式提供参考。In order to study the crack propagation law of reinforced concrete beams and the effect of CFRP reinforcement on crack propagation, a three-dimensional finite element analysis model of unreinforced and reinforced concrete beams was established. This paper analyzes the stress of reinforced concrete beams and carbon fiber cloth and studies the influence of carbon fiber cloth reinforcement on the stress performance and crack propagation of reinforced concrete beams. The results show that the flexural bearing capacity of reinforced concrete beams can be improved by carbon fiber cloth strengthen, in which the bearing capacity of reinforced concrete beams increased by 3.4 % with one layer of carbon fiber cloth and 6.5 % with two layers of carbon fiber cloth, in addition, the development of cracks can be delayed and restrained. The research results of this paper will lay a foundation for optimizing the reinforcement methods of reinforced concrete beams in the future.

关 键 词：混凝土梁 碳纤维布 加固 裂缝 有限元 

分 类 号：TU375.1[建筑科学—结构工程]