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Lagged strain of laminates in RC beams strengthened with fiber-reinforced polymer

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Abstract

Based on the theory of concrete structure, a new expression was derived for lagged strain of fiber-reinforced polymer (FRP) laminates in reinforced concrete (RC) beams strengthened with FRP. The influence of different preloaded states and nonlinear stress-strain relationship of compressed concrete were both taken into account in this approach. Then a simplified expression was given by ignoring tensile resistance of concrete. Comparison of analytical predictions with experimental results indicates satisfactory accuracy of the procedures. The errors are less than 8% and 10% respectively when the tensile resistance of concrete is or not considered. While the maximum error of existing procedures is up to 60%.

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Authors and Affiliations

  1. School of Civil and Architectural Engineering, Central South University, Changsha, 410075, China

    He Xue-jun  (贺学军) (Doctoral candidate, Associate professor), Zhou Chao-yang  (周朝阳), Li Yi-hui  (**毅卉) & Xu Ling  (徐玲)

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  1. He Xue-jun  (贺学军)
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  2. Zhou Chao-yang  (周朝阳)
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  3. Li Yi-hui  (**毅卉)
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  4. Xu Ling  (徐玲)
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Corresponding author

Correspondence to He Xue-jun  (贺学军).

Additional information

Foundation item: Project(2002G043) supported by the Science & Technology Research Program of Chinese Railway Ministry; Project (05JJ30101) supported by the Natural Science Foundation of Hunan Province, China

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He, Xj., Zhou, Cy., Li, Yh. et al. Lagged strain of laminates in RC beams strengthened with fiber-reinforced polymer. J Cent. South Univ. Technol. 14, 431–435 (2007). https://doi.org/10.1007/s11771-007-0084-2

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  • DOI: https://doi.org/10.1007/s11771-007-0084-2

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