Journal of Shandong University(Engineering Science) ›› 2026, Vol. 56 ›› Issue (1): 114-121.doi: 10.6040/j.issn.1672-3961.0.2024.280

• Civil Engineering • Previous Articles    

Design theory and experimental study of strengthening reinforced concrete beams with prestressed carbon fiber cloth

QIN Yu1, ZHANG Zejun2, RAN Yao1, JIANG Kai3, YANG Jiacheng1, QIAN Yuanshun1, GUAN Yanhua1*, SUN Renjuan1   

  1. QIN Yu1, ZHANG Zejun2, RAN Yao1, JIANG Kai3, YANG Jiacheng1, QIAN Yuanshun1, GUAN Yanhua1*, SUN Renjuan1(1. School of Qilu Transportion, Shandong University, Jinan 250002, Shandong, China;
    2. Shandong Expressway Group Co., Ltd., Innovation Research Institute, Jinan 250014, Shandong, China;
    3. Shandong Expressway Heze Development Co., Ltd., Heze 274046, Shandong, China
  • Published:2026-02-03

PDF (PC)

3

Abstract: To improve the design theory of reinforced concrete(RC)beams strengthened with prestressed carbon fiber sheets and expand their engineering applications, systematic theoretical analysis and experimental verification studies were conducted. Based on the ductile failure criterion and the plane section assumption of RC beams, the control boundaries of the initial tension strain of carbon fiber sheets under different strengthening layers were clarified. Combined with the requirement for improving the flexural bearing capacity of beams, a quantitative calculation method for the number of carbon fiber sheet strengthening layers and the initial tension strain was established. In accordance with the adaptation requirements of engineering practice, a complete design process for RC beams strengthened with prestressed carbon fiber sheets was constructed, and the strengthening effect was evaluated through four-point bending tests. The experimental results showed that the strengthened RC beams exhibited an ideal plastic failure mode, and their bearing capacity meets the design requirements, which proved the scientificity and practicability of the proposed design method.

Key words: prestressed carbon fiber cloth, initial tensile strain, number of carbon fiber cloth reinforcement layers, strengthening design, four-point bending test

CLC Number: 

  • U446.1
[1] 王文炜, 李果. 纤维增强塑料(FRP)在混凝土结构中的研究与应用[J]. 混凝土, 2001(10): 37-39. WANG Wenwei, LI Guo. Research and application of FRP for RC structures[J]. Concrete, 2001(10): 37-39.
[2] 刘赛, 朱德举, 李安令. 织物增强混凝土的研究与应用进展[J]. 建筑科学与工程学报, 2017, 34(5): 134-146. LIU Sai, ZHU Deju, LI Anling. Research and application progress of textile reinforced concrete[J]. Journal of Architecture and Civil Engineering, 2017, 34(5): 134-146.
[3] SMITH S T, TENG J G. FRP-strengthened RC beams. I: review of debonding strength models[J]. Engineering Structures, 2002, 24(4): 385-395.
[4] MUGAHED AMRAN Y H, ALYOUSEF R, RASHID R S M, et al. Properties and applications of FRP in strengthening RC structures: a review[J]. Structures, 2018, 16: 208-238.
[5] 卢亦焱, 黄银燊, 张号军, 等. FRP加固技术研究新进展[J]. 中国铁道科学, 2006, 27(3): 34-42. LU Yiyan, HUANG Yinshen, ZHANG Haojun, et al. New progress in the study of the technology of reinforcement with fiber reinforced plastics[J]. China Railway Science, 2006, 27(3): 34-42.
[6] 王文炜, 戴建国, 张磊. 后张预应力碳纤维布加固钢筋混凝土梁预应力损失试验及计算方法研究[J]. 土木工程学报, 2012, 45(11): 88-94. WANG Wenwei, DAI Jianguo, ZHANG Lei. Experimental study on prestress loss of reinforced concrete beams strengthened with post-tensioned prestressed carbon fiber sheets and its calculation method[J]. China Civil Engineering Journal, 2012, 45(11): 88-94.
[7] 张建仁, 唐皇, 彭建新, 等. 钢板加固锈蚀RC梁短期挠度计算方法和试验[J]. 中国公路学报, 2015, 28(10): 41-50. ZHANG Jianren, TANG Huang, PENG Jianxin, et al. Calculating method and test research of short-term deflection of corroded RC beam strengthened by steel plate[J]. China Journal of Highway and Transport, 2015, 28(10): 41-50.
[8] 高仲学, 王文炜, 黄辉. 预应力碳纤维布加固钢筋混凝土梁抗弯承载力计算[J]. 东南大学学报(自然科学版), 2013, 43(1): 195-202. GAO Zhongxue, WANG Wenwei, HUANG Hui. Calculation of flexural capacity of RC beams strengthened with prestressed CFRP sheets[J]. Journal of Southeast University(Natural Science Edition), 2013, 43(1): 195-202.
[9] LU Z, BOOTHBY T E, BAKIS C E, et al. Transfer and development lengths of FRP prestressing tendons[J]. PCI Journal, 2000, 45(2): 84-95.
[10] 张国伟,宋佳晔,薛红京,等.预应力碳纤维织物增强混凝土板加固RC梁抗弯性能研究[J]. 工程力学, 2025, 42(10): 90-99. ZHANG Guowei, SONG Jiaye, XUE Hongjing, et al. Study on flexural performance of reinforced rc beams strengthened with prestressed carbon textile reinforced concrete plates[J]. Engineering Mechanics, 2025, 42(10): 90-99.
[11] 赵彤, 谢剑, 戴自强. 碳纤维布加固钢筋混凝土梁的受弯承载力试验研究[J]. 建筑结构, 2000, 30(7): 11-15. ZHAO Tong, XIE Jian, DAI Ziqiang. Experimental study on flexural strength of RC beams strengthened with continuous carbon fiber sheet[J]. Building Structure, 2000, 30(7): 11-15.
[12] 陈爱玖, 韩小燕, 杨粉, 等. 预应力碳纤维布加固钢筋再生混凝土梁受弯承载力研究[J]. 土木工程学报, 2018, 51(11): 104-112. CHEN Aijiu, HAN Xiaoyan, YANG Fen, et al. Study on flexural capacity of reinforced recycled concrete beams strengthened with prestressed CFRP sheets[J]. China Civil Engineering Journal, 2018, 51(11): 104-112.
[13] GARDEN H N, HOLLAWAY L C. An experimental study of the failure modes of reinforced concrete beams strengthened with prestressed carbon composite plates[J]. Composites Part B: Engineering, 1998, 29(4): 411-424.
[14] 宁宝宽, 胡海涛, 徐永泽, 等. 预应力碳纤维布加固钢筋混凝土梁力学性能试验[J]. 建筑结构, 2020, 50(6): 90-94. NING Baokuan, HU Haitao, XU Yongze, et al. Experimental study on mechanical behavior of reinforced concrete beam strengthened with prestressed CFRP sheets[J]. Building Structure, 2020, 50(6): 90-94.
[15] 叶列平, 庄江波, 曾攀, 等. 预应力碳纤维布加固钢筋混凝土T形梁的试验研究[J]. 工业建筑, 2005, 35(8): 7-12. YE Lieping, ZHUANG Jiangbo, ZENG Pan, et al. Experimental study on reinforced concrete T-beams strengthened with prestressed cfrp sheets[J]. Industrial Construction, 2005, 35(8): 7-12.
[16] 童谷生, 李志虎, 朱成九, 等. 预应力碳纤维布材加固混凝土梁的受弯性研究[J]. 华东交通大学学报, 2005, 22(2): 1-5. TONG Gusheng, LI Zhihu, ZHU Chengjiu, et al. The experimental study of strengthening reinforced concrete beam using prestressed carbon fiber sheet[J]. Journal of East China Jiaotong University, 2005, 22(2): 1-5.
[17] 庄芸. 预应力碳纤维布加固梁最佳预应力水平的确定[J]. 武汉工程大学学报, 2008, 30(4): 15-19. ZHUANG Yun. Determination of the best prestressed level to reinforced concrete beams strengthened with prestressed carbon fiber reinforced polymer[J]. Journal of Wuhan Institute of Technology, 2008, 30(4): 15-19.
[18] 中华人民共和国住房和城乡建设部. 混凝土结构加固设计规范: GB 50367—2013[S]. 北京: 中国建筑工业出版社, 2014.
[19] 尚守平, 彭晖, 童桦, 等. 预应力碳纤维布材加固混凝土受弯构件的抗弯性能研究[J]. 建筑结构学报, 2003, 24(5): 24-30. SHANG Shouping, PENG Hui, TONG Hua, et al. Study of strengthening reinforced concrete beam using prestressed carbon fiber sheet[J]. Journal of Building Structures, 2003, 24(5): 24-30.
[20] 中华人民共和国住房和城乡建设部. 混凝土结构设计标准: GB 50010—2010[S]. 北京: 中国建筑工业出版社, 2024.
[21] 中国工程建设标准化协会. 碳纤维片材加固混凝土结构技术规程(2007年版): CECS 146—2003[S]. 北京: 中国计划出版社, 2007.
[22] 叶见曙. 结构设计原理[M]. 4版. 北京: 人民交通出版社, 2018: 68-69.
[23] 中华人民共和国交通运输部. 公路桥梁加固设计规范:JTG/T J22—2008[S]. 北京: 人民交通出版社, 2008.
[24] 管延华, 苗海涛, 宋修广. FRP-螺栓联合加固技术锚固参数的研究[J]. 山东大学学报(工学版), 2010, 40(3): 128-132. GUAN Yanhua, MIAO Haitao, SONG Xiuguang. Study of the anchoring parameter for the hybrid bonding of FRP[J]. Journal of Shandong University(Engineering Science), 2010, 40(3): 128-132.
[25] 刘长源. 预应力BFRP板外贴加固RC梁抗弯性能研究[D]. 南京: 东南大学, 2020. LIU Changyuan. Study on the Bending Performance of Steel Reinforced concrete beams strengthened by Prestressed and Externally Bonded BFRP Plates[D]. Nanjing: Southeast University, 2020.
No related articles found!
Viewed
Full text


Abstract

Cited
  Shared   
  Discussed   
No Suggested Reading articles found!
Copyright 2018 © Editorial office of Journal of Shandong University (Engineering Science)
Supported by Beijing Magtech Co.Ltd