Buy article PDF
The purchased file will be sent to you
via email after the payment is completed.
US$ 35
|
Structural Engineering and Mechanics Volume 39, Number 3, August10 2011 , pages 361-382 DOI: https://doi.org/10.12989/sem.2011.39.3.361 |
|
|
|
Efficacy of CFRP configurations for shear of RC beams: experimental and NLFE |
||
Ahmed B. Shuraim
|
||
| Abstract | ||
| This paper presents the results of an investigation on shear strengthening of RC beams externally reinforced with CFRP composite. A total of six full-scale beams of four CFRP strengthened and two unstrengthened were tested in the absence of internal stirrups in the shear span. The strengthening configurations contained two styles: discrete uniformly spaced strips and customized wide strips over B-regions. The composite systems provided an increase in ultimate strength as compared to the unstrengthened beams. Among the three layouts that had the same area of CFRP, the highest contribution was provided by the customized layout that targeted the B-regions. A comparative study of the experimental results with published empirical equations was conducted in order to evaluate the assumed effective strains. The empirical equations were found to be unconservative. Nonlinear finite element (NLFE) models were developed for the beams. The models agreed with test results that targeting the Bregion was more effective than distributing the same CFRP area in a discrete strip style over shear spans. Moreover, the numerical models predicted the contribution of different configurations better than the empirical equations. | ||
| Key Words | ||
| shear strengthening; reinforced concrete beams; CFRP; composite modeling; NLFE; empirical equations; externally bonded reinforcement | ||
| Address | ||
| Ahmed B. Shuraim: College of Engineering (Civil), King Saud University, Riyadh, Saudi Arabia | ||