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Computers and Concrete Volume 12, Number 4, October 2013 , pages 499-518 DOI: https://doi.org/10.12989/cac.2013.12.4.499 |
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An efficient method for the compressive behavior of FRP-confined concrete cylinders |
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Xinglang Fan, Zhimin Wu, Yufei Wu and Jianjun Zheng
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| Abstract | ||
| Fiber reinforced polymer (FRP) jackets have been widely used as an effective tool for the strengthening and rehabilitation of concrete structures, especially damaged concrete columns. Therefore, a clear understanding of the compressive behavior of FRP-confined concrete is essential. The objective of this paper is to develop a simple efficient method for predicting the compressive strength, the axial strain at the peak stress, and the stress-strain relationship of FRP-confined concrete. In this method, a compressive strength model is established based on Jefferson\'failure surface. With the proposed strength model, the strength of FRP-confined concrete can be estimated more precisely. The axial strain at the peak stress is then evaluated using a damage-based formula. Finally, a modified stress-strain relationship is derived based on Lam and Teng\'s model. The validity of the proposed compressive strength and strain models and the modified stress-strain relationship is verified with a wide range of experimental results collected from the research literature and obtained from the self-conducted test. It can be concluded that, as a competitive alternative, the proposed method can be used to predict the compressive behavior of FRP-confined concrete with reasonable accuracy. | ||
| Key Words | ||
| FRP-confined concrete; strength model; strain model; stress-strain relationship | ||
| Address | ||
| Xinglang Fan and Zhimin Wu: State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian , P. R. China Yufei Wu: Department of Civil and Architectural Engineering, City University of Hong Kong, Kowloon, Hong Kong Jianjun Zheng: School of Civil Engineering and Architecture, Zhejiang University of Technology, Hangzhou, P. R. China | ||