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Abstract
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Article Information:
Strengthening of RC Beams with Large Openings in Shear by CFRP Laminates: Experiment and 2D Nonlinear Finite Element Analysis
S.C. Chin, N. Shafiq and M.F. Nuruddin
Corresponding Author: S.C. Chin
Submitted: January 10, 2012
Accepted: January 29, 2012
Published: May 01, 2012 |
Abstract:
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This study presents the experimental study and numerical analysis of Reinforced Concrete (RC)
beams with large square openings placed in the shear region, at a distance 0.5d and d away from the support,
strengthened by Carbon Fiber Reinforced Polymer (CFRP) laminates. This research aims to investigate the
strength losses in RC beam due to the presence of large square openings placed at two different locations in
shear region. Also, in order to re-gain the beam structural capacity loss due to the openings, strengthening by
CFRP laminates around the openings were studied. A total of six RC beams were tested to failure under four
point loading including control beams, un-strengthened and strengthened RC beams with large square openings
in shear region at a distance 0.5d and d away from the support. The CFRP strengthening configuration
considered in this study was a full wrapping system around the square openings. A nonlinear finite element
program, ATENA was used to validate the results of the tested beams. Comparisons between the finite element
predictions and experimental results in terms of crack patterns and load deflection relationships are presented.
The crack pattern results of the finite element model show good agreement with the experimental data. The load
midspan deflection curves of the finite element models exhibited a stiffer result compared to the experimental
beams. The possible reason may be due to the perfect bond assumption between the concrete and steel
reinforcement.
Key words: CFRP, large opening, RC beam, square, strengthening, ,
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Cite this Reference:
S.C. Chin, N. Shafiq and M.F. Nuruddin, . Strengthening of RC Beams with Large Openings in Shear by CFRP Laminates: Experiment and 2D Nonlinear Finite Element Analysis. Research Journal of Applied Sciences, Engineering and Technology, (09): 1172-1180.
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ISSN (Online): 2040-7467
ISSN (Print): 2040-7459 |
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