[1] Wang Wenwei, Li Guo,. Behavior of interfacial stresses between RC beams and GFRP sheets [J]. Journal of Southeast University (English Edition), 2007, 23 (1): 105-111. [doi:10.3969/j.issn.1003-7985.2007.01.021]

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Behavior of interfacial stresses between RC beams and GFRP sheets()

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

23

Issue:

2007 1

Page:

105-111

Research Field:

Materials Sciences and Engineering

Publishing date:

2007-03-30

Info

Title:

Behavior of interfacial stresses between RC beams and GFRP sheets

Author(s):

Wang Wenwei¹;  Li Guo²

¹School of Transportation, Southeast University, Nanjing 210096, China
²Chengxian College, Southeast University, Nanjing 210096, China

Keywords:

glass fiber reinforced plastic(GFRP);  strengthening;  reinforced concrete beam;  shear stress;  normal stress

PACS:

TU582.57

DOI:

10.3969/j.issn.1003-7985.2007.01.021

Abstract:

Seven reinforced concrete(RC)beams with epoxy-bonded glass fiber reinforced plastic(GFRP)sheets and two control RC beams were experimentally tested to investigate the bond behavior of the interfaces between RC beams and GFRP sheets.The variable parameters considered in test beams are the layers of GFRP sheets, the bond lengths and the reinforcement ratios.The results indicate that the flexural strength of the repaired beams is increased, but the ultimate load of beams with GFRP sheets debonding failure is reduced relatively.The bond length is the main factor that results in bonding failure of the strengthened beams.An experimental method of interfacial shear stress is proposed to analyze the distribution of shear stress according to experimental results.The analytical method of shear and normal stresses and a simple equation are proposed to predict the peeling loads.The proposed model is applied to experimental beams.The analytical results show a good agreement with the experimental results.

References:

[1] Wang Wenwei, Zhao Guofan, Huang Chengkui, et al.Experimental study of strengthening of reinforced concrete beams with externally bonded GFRP sheets [J].Journal of Dalian University of Technology, 2003, 43(6):799-805.(in Chinese)
[2] Wang Wenwei, Li Guo.Experimental study and analysis of RC beams strengthened with CFRP laminates under sustaining load [J].International Journal of Solids and Structures, 2006, 43(3):1372-1387.
[3] Yao W.Flexural strength and behavior of polypropylene fiber reinforced concrete beams[J].Journal of Wuhan University of Technology: Materials Science Edition, 2002, 17(3):54-57.
[4] Wang Wenwei, Zhao Guofan, Huang Chengkui, et al.An experimental study of strengthening of initially loaded reinforced concrete beams using CFRP sheets [J].Engineering Mechanics, 2001, 21(4):172-178.(in Chinese)
[5] Ye Lieping, Zhao Shuhong, Yue Qingrui, et al.Calculation of shear strength of concrete column strengthened with carbon fiber reinforced plastic sheet [J].Journal of Building Structures, 2000, 21(2):59-67.(in Chinese)
[6] Arduini Marco, Tommaso Angelo Di, Nanni Antonio.Parametric study of beams with externally bonded FRP reinforcement [J].ACI Structural Journal, 1997, 94(5):493-501.
[7] Malek Amir M, Saadatmanesh Hamid, Ehsani Mohammad R.Prediction of failure load of RC beams strengthened with FRP plate due to stress concentration at the plate end [J].ACI Structural Journal, 1998, 95(1):142-153.
[8] Xu Zhilun.Elasticity mechanics [M].Beijing:Higher Education Press, 1978.(in Chinese)
[9] Guo Zhenhai.Theory of reinforce concrete structures [M].Beijing:Tsinghua University Press, 1999.(in Chinese)
[10] Roberts T M.Approximate analysis of shear and normal stress concentration in the adhesive layer of plated RC beams [J].Structural Engineering, 1989, 12:228-233.

Memo

Memo:

Biography: Wang Wenwei(1971—), male, doctor, associate professor, wenwei_wang@163.com.

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