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DOI Prefix 10.20431 |
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Some Parameters Affecting the Behavior of Strengthening of Rectangular R.C. Beams Failed in Shear by Using C.F.R.P.
Assem Nan SaleebKaldes1,Prof.Dr.Abd El-Rahman Megahid Ahmed2,Prof.Dr.Mohammed M.M.Rashwan2,Prof.Dr.Mohamed M.Ahmed3
2.Professor of Properties and Strength of Materials, Assuit University.
3.Associated Professor of Structural Engineering, Assuit University, Egypt.
Citation : Assem Nan SaleebKaldes,et.al, Some Parameters Affecting the Behavior of Strengthening of Rectangular R.C. Beams Failed in Shear by Using C.F.R.P. International Journal of Constructive Research in Civil Engineering 2018, 4(1) : 49-69
This paper exemplifies both the shear strengthening capacity and modes of failure of Reinforced Concrete (RC) rectangular shear beams bonded externally with carbon fiber reinforced polymer CFRP-U strips. Sixteen RC beams without internal shear reinforcement and four beams with internal shear reinforcement were tested; seven beams were kept as a control beams; whereas other beams were strengthened externally with CFRP-U strips. Test variables were (i)grade of concrete (ii) longitudinal tensile reinforcement ratio (iii) % of shear reinforcement (iv) orientation of CFRP strips (v)width of CFRP strips (vi) spacing of CFRP strips. Tests results show the effectiveness and shear capacity of CFRP strengthened specimens. The shear enhancement of CFRP strengthened beams varied between 17% and 127% over the control beams depending on various factors .This study confirms that the CFRP-U strips technique significantly enhances the shear capacity of reinforced concrete shear beams. The experimental results of the shear-CFRP strengthened beam were compared with the available theoretical results.