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Journal of Zhejiang University SCIENCE A 2006 Vol.7 No.3 P.436~444

http://doi.org/10.1631/jzus.2006.A0436


Behavior of preloaded RC beams strengthened with CFRP laminates


Author(s):  Zhang Ai-hui, Jin Wei-liang, Li Gui-bing

Affiliation(s):  Department of Civil Engineering, Zhejiang University, Hangzhou 310027, China

Corresponding email(s):   zah@zju.edu.cn, liguibing@zju.edu.cn

Key Words:  Beam, Strengthen, CFRP, Flexural behavior, Preload level


Zhang Ai-hui, Jin Wei-liang, Li Gui-bing. Behavior of preloaded RC beams strengthened with CFRP laminates[J]. Journal of Zhejiang University Science A, 2006, 7(3): 436~444.

@article{title="Behavior of preloaded RC beams strengthened with CFRP laminates",
author="Zhang Ai-hui, Jin Wei-liang, Li Gui-bing",
journal="Journal of Zhejiang University Science A",
volume="7",
number="3",
pages="436~444",
year="2006",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.2006.A0436"
}

%0 Journal Article
%T Behavior of preloaded RC beams strengthened with CFRP laminates
%A Zhang Ai-hui
%A Jin Wei-liang
%A Li Gui-bing
%J Journal of Zhejiang University SCIENCE A
%V 7
%N 3
%P 436~444
%@ 1673-565X
%D 2006
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.2006.A0436

TY - JOUR
T1 - Behavior of preloaded RC beams strengthened with CFRP laminates
A1 - Zhang Ai-hui
A1 - Jin Wei-liang
A1 - Li Gui-bing
J0 - Journal of Zhejiang University Science A
VL - 7
IS - 3
SP - 436
EP - 444
%@ 1673-565X
Y1 - 2006
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.2006.A0436


Abstract: 
Eighteen reinforced concrete beams, including 16 beams strengthened with CFRP laminate at different levels of preload and 2 control beams, were tested to investigate the influence of preload level on flexural behavior of CFRP-strengthened RC beam. The experimental parameters include rebar ratios, number of plies of CFRP laminates and preload level at the time of strengthening. Theoretical analysis was also carried out to explain the experimental phenomena and results. The experimental and theoretical results indicated that the preload level has more influence on the stiffness and deflection of the strengthened beam, both at post-cracking and post-yielding stage, than that on the yielding and ultimate flexural strength of the strengthened beam. The main failure mode of CFRP-strengthened beam is the intermediate crack-induced debonding of CFRP laminates, provided that the development length of CFRP laminates and shear capacity of the beam are sufficient.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article

Reference

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[9] Shin, Y.S., Lee, C., 2003. Flexural behavior of RC beams strengthened with carbon fiber-reinforced polymer laminates at different levels of sustaining load. ACI Structural Journal, 100(2):231-239.

[10] Smith, S.T., Teng, J.G., 2002. FRP-strengthened RC beams. I: review of debonding strength models. Engineering Structures, 24(4):385-395.

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