Volume 3, Issue 3, June 2018, Page: 64-77
Behavior of Axially Loaded CFRP Confined Large-Scale Capsule-Shaped RC Short Columns with Higher Cross-Sectional Aspect Ratio
Abd El Rahman Megahid Ahmed, Civil Engineering Department, Faculty of Engineering, Assiut University, Assiut, Egypt
Omar Ahmed Farghal, Civil Engineering Department, Faculty of Engineering, Assiut University, Assiut, Egypt
Walied Ahmed Bazar, Civil Engineering Department, Hadhramout University, Hadhramout, Yemen
Received: Jul. 4, 2018;       Accepted: Jul. 12, 2018;       Published: Aug. 7, 2018
DOI: 10.11648/j.jccee.20180303.13      View  493      Downloads  38
Abstract
This paper aimed to experimentally and analytically investigate the behavior of reinforced concrete (RC) short capsule-shaped columns confined with carbon fiber-reinforced polymer (CFRP) sheets. The efficiency of FRP-confined strengthening system depends mainly on different encountered parameters such as the FRP confinement ratio, shape and size of cross-section, and cross sectional aspect ratio of non-circular columns. The effects of varying the aspect ratio (h/b=2, 2.5, 3 and 4), FRP confinement ratio (number of FRP layers), and FRP-wrapping configuration (full and partial system) are examined in this study. The experiment results showed that the efficiency of FRP confined system was proven to be lower with higher aspect ratio than that with the lower aspect ratio. Confinement by CFRP sheets enhances the performance of capsule-shaped RC columns subjected to axial compressive loads, and it is an efficient technique to improve the strength and ductility of capsule shaped RC columns regardless the cross sectional aspect ratio and the type of confinement. Analytical model was proposed by the authors to predict the axial load carrying capacity of short capsule-shaped reinforced concrete columns. The proposed model is compared with the existing model, showing good agreement with the experimental results and it is improved performance and gives reasonable predictions of load carrying capacity of FRP-confined columns.
Keywords
Capsule-Shaped, Axial Load, Aspect Ratio, Short Column, CFRP
To cite this article
Abd El Rahman Megahid Ahmed, Omar Ahmed Farghal, Walied Ahmed Bazar, Behavior of Axially Loaded CFRP Confined Large-Scale Capsule-Shaped RC Short Columns with Higher Cross-Sectional Aspect Ratio, Journal of Civil, Construction and Environmental Engineering. Vol. 3, No. 3, 2018, pp. 64-77. doi: 10.11648/j.jccee.20180303.13
Copyright
Copyright © 2018 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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