RESEARCH ARTICLE


Investigation on Flexural Performance of RC Beams Flexurally Strengthened by Side-bonded CFRP Laminates



Guibing Li*, 1, Yugang Guo2, Xiaoyan Sun3
1 College of Management Science and Engineering, Shandong Institute of Business and Technology, Yantai, 264005, China
2 International Business College, Shandong Institute of Business and Technology, Yantai, 264005, Chin
3 College of Civil Engineering and Architecture, Zhejiang University, Hangzhou, 310028, China


Article Metrics

CrossRef Citations:
7
Total Statistics:

Full-Text HTML Views: 257
Abstract HTML Views: 287
PDF Downloads: 183
Total Views/Downloads: 727
Unique Statistics:

Full-Text HTML Views: 178
Abstract HTML Views: 204
PDF Downloads: 169
Total Views/Downloads: 551



Creative Commons License
© 2012 Li et al;

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: https://creativecommons.org/licenses/by/4.0/legalcode. This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

* Address correspondence to this author at the College of management science and engineering, Shandong Institute of Business and Technology, Yantai, 264005, China; Tel: +86-755-6903575; E-mails: bassey69@yahoo.com, leegb@sina.com


Abstract

It is an effective way to improve the flexural behavior of reinforced concrete (RC) members by externally bonded carbon fiber reinforcement polymer (CFRP) laminates on the soffit of the members. However, there is little investigation on flexural performance of RC beam flexurally strengthened by side-bonded FRP laminates. To investigate the flexural behavior of RC beams side-bonded CFRP laminates and the difference of RC beams strengthened by soffit-bonded and side-bonded CFRP laminates, a total of 8 CFRP-strengthened beams and 1 control beam were tested. The experimental results show that: 1) the first crack loads of RC beams strengthened by side-bonded CFRP laminates are much higher than that of RC beams strengthened by soffit-bonded CFRP laminates. The first crack loads of side-bonded CFRP laminates beams improved significantly; 2) Side-bonded and soffit-bonded CFRP laminates have almost the same effect on the flexural stiffness of RC beams strengthened with same quantity of CFRP laminates before tension rebar yielding. However, side-bonded CFRP laminates can affect crack width and crack pattern of the strengthened beams, and the pre-crack stage of RC beam by sidebonded CFRP laminates extended remarkably. 3) different to soffit-bonded CFRP laminates RC beams, side-bonded CFRP laminates cannot improve the first yielding and the ultimate load bearing capacity of RC beams.

Keywords: RC beam, side-bonded, CFRP, flexural performance.