Study on Contrastive Experiment of Full-Scale Concrete Beam Strengthened with Near-Surface-Mounted and Externally-Bonded Carbon Fiber Plate

Abstract:

The carbon fiber has been widely applied in the building reinforcement because of its light weight, high strength, good viscosity, heat resistance, corrosion resistance, anti-fatigue, easy to be cutting and constructed, etc. Considering the FRP strengthened experimental data of large and full-scale concrete beam is relatively insufficient, in this paper, two strengthening methods, namely, near-surface-mounted and externally-bonded carbon fiber plate, are used for of contrastive experimental study of eight full-scale concrete beams, to analyze the influence of two strengthening methods on bearing capacity, deformation and failure mode of concrete beam, etc.The analysis results show that two strengthening methods can improve the mechanical behavior of concrete beam, its yield load and ultimate load, and delay the crack development.The externally-bonded strengthening method, however, has a high request for bonding technique, otherwise, the debonding and failure easily occur; while the near-surface-mounted strengthening method can effectively avoid the failure, and give full play to the high strength of carbon fiber plate, so this kind of strengthening method should be generalized and wildly applied.

• Periodical: Applied Mechanics and Materials (Volume 526)
• Pages: 52-58
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.526.52
• Online since: February 2014
• Authors: Yi Hui Li*, Xiao Pin Wang, Qiao Yan Jia, Chao Yang Zhou
• Keywords: Carbon Fiber (CF), Concrete Beam, Externally-Bonded, Full Scale, Near-Surface-Mounted

References

[1] YE Lie-ping, CUI Wei, YUE Qing-rui , et al. Analysis and calculation of flexural strength of RC members strengthened with CFRP sheet [J ] . Building Structure, 2001, 31 (3): 3 - 5.

[2] WU Gang, AN Lin , LV Zhi-tao. Experimental investigation and analysis on the flexural strengthening for RC beams bonded with carbon fiber sheet [ J ] . Building Structure , 2000 , 30 (7) : 3 - 6.

[3] (WANG Wen-wei, ZHAO Guo-fan, HUANG Cheng-kui, et al. An experimental study of strengthening of initially loaded reinforced concrete beams using CFRP Sheets [J]. Engineering Mechanics, 2004, 21 (4): 172 - 178. (In Chinese) ).

[4] ZHOU Chao-yang, L I Yi-hui , HE Xue-jun. Flexural behavior of large-scale RC beams reinforced with externally bonded carbon fiber sheet s[J] . Journal of Railway Science and Engineering, 2007, 4 (4) : 42 - 46.

[5] YUE Qing-yue , LI Qingwei , YANG Yong-xin . Fiber Reinforced Composites Embedded Reinforcement Technique [J]. Industrial Construction 2004, 34 (4): 1 -4.

[6] LI Rong, TENG Jin-guang, QUE Qing-rui. New areas of FRP reinforced concrete structural applications-- Embedded (NSM) Reinforcement Method [J]. Industrial Construction 2004, 34 ( 4 ) : 5- 10.

[7] SUN Zhi-yang, ZHANG Zhi-mei, LIU Tao, Experimental Research on Embedded CFRP Plate Reinforcement on the Bending Performance of Damaged RC Beams. [J]. Sichuan Building Science, 2013, 39(4): 112-116.

[8] WANG Guang-man, YAO Jian, LIAO Zhi-gang. Progress Study on FRP Flexural Strengthening of RC Beam Slab Surface Embedded Stick [J]. Bulletin of Science and Technology, 2011 03.

[9] He Xue-jun , Zhou Chao-yang , Xu Ling, Experimental Study on the Flexural Behavior of Reinforced Concrete Beams Strengthened With Near-surface Mounted CFRP Laminates [J]. CHINA CIVIL ENGINEERING Journal , Vol . 41 No. 2008. 12: 14-20.

DOI: 10.1201/b19880-143