Issue 58

M. Emara et alii, Frattura ed Integrità Strutturale, 58 (2021) 48-64; DOI: 10.3221/IGF-ESIS.58.04

Numerical assessment of reinforced concrete beams strengthened with CFRP sheets under impact loading

Mohamed Emara, Nada Elkomy, Hilal Hassan Structural Engineering Dept., Faculty of Engineering, Zagazig University, Zagazig, 44519, Egypt mremara@eng.zu.edu.eg, http://orcid.org/0000-0003-4936-5257 nadaelkomy16@gmail.com habdelkader@zu.edu.eg, http://orcid.org/0000-0001-5486-5497 A BSTRACT . This paper investigates numerically the behavior of Reinforced Concrete (RC) beams, strengthened using Carbon Fiber Reinforced Polymers (CFRP) sheets, subjected to impact loading. Three-dimensional finite element analysis was performed and its results were verified against experimental ones available in the literature showing good agreement. Then, a comprehensive parametric study was performed to investigate the effect of studied parameters on the strengthened RC beams. The main studied parameters were the type and size of reinforcing bars, geometric characteristics of externally bonded CFRP sheets (width, length, and thickness), impact velocity, and the position of the impactor with respect to the beam. Results showed that the use of externally bonded CFRP sheets enhanced the beam capacity and failure mode, and reduced the mid-span deflection. On the other hand, increasing the impact velocity increased the mid-span displacement, however, the use of CFRP bars as internal reinforcement could reduce the increase in the deflection. Moreover, changing the position of the impact load application showed a significant effect on the mid-span displacement as well as the failure mode of tested beams. K EYWORDS . Concrete; RC Beams; Finite Element; Carbon Fiber Reinforced Polymers; Impact.

Citation: Emara, M., Elkomy, N., Hassan, H., Numerical Assessment of Reinforced Concrete Beams Strengthened with CFRP Sheets Under Impact Loading, Frattura ed Integrità Strutturale, 58 (2021) 48-64.

Received: 16.04.2021 Accepted: 11.07.2021 Published: 01.10.2021

Copyright: © 2021 This is an open access article under the terms of the CC-BY 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

I NTRODUCTION mpact loading research has significant civil engineering applications, such as crash barrier design, structural impact resistance design toward military and terrorist attack, rock fall, vehicle collision, inadvertently dropping heavy objects on buildings, marine buildings impact resistance design, and blonde fence design. Nowadays, Fiber Reinforced Polymers (FRP) materials are being widely used in strengthening and retrofitting Reinforced Concrete (RC) structures due I

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