Flexural Performance of RC Beams Strengthened with Externally-Side Bonded Reinforcement (E-SBR) Technique Using CFRP Composites

Materials

Fadi Althoey¹  U.Johnson Alengaram²  N.H. Ramli Sulong²  MohdZamin Jumaat²  Md.Akter Hosen³ 

[1] Department of Civil Engineering, College of Engineering, Najran University, Najran 1988, Saudi Arabia;Department of Civil Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur 50603, Malaysia;Department of Civil and Environmental Engineering, College of Engineering, Dhofar University, Salalah 2509, Oman;

关键词: flexural strengthening;    E-SBR;    CFRP composites;    ductility;    energy absorption capability;    stiffness;   

DOI  :  10.3390/ma14112809

来源: DOAJ

【 摘 要 】

Reinforced concrete (RC) structures necessitate strengthening for various reasons. These include ageing, deterioration of materials due to environmental effects, trivial initial design and construction, deficiency of maintenance, the advancement of design loads, and functional changes. RC structures strengthening with the carbon fiber reinforced polymer (CFRP) has been used extensively during the last few decades due to their advantages over steel reinforcement. This paper introduces an experimental approach for flexural strengthening of RC beams with Externally-Side Bonded Reinforcement (E-SBR) using CFRP fabrics. The experimental program comprises eight full-scale RC beams tested under a four-point flexural test up to failure. The parameters investigated include the main tensile steel reinforcing ratio and the width of CFRP fabrics. The experimental outcomes show that an increase in the tensile reinforcement ratio and width of the CFRP laminates enhanced the first cracking and ultimate load-bearing capacities of the strengthened beams up to 141 and 174%, respectively, compared to the control beam. The strengthened RC beams exhibited superior energy absorption capacity, stiffness, and ductile response. The comparison of the experimental and predicted values shows that these two are in good agreement.

【 授权许可】

Unknown