Strengthening of Continuous SCC Hollow Beams under Shear Stresses Using Warped CFRP Strips

Ali Hameed Aziz, Ashraf A. Alfeehan, Fawaz Adel Hussein


The present paper is deal with shear strength evaluation of continuous self-compacting concrete hollow beams containing internal concrete ribs and externally strengthening by carbon fiber strips (CFRP). Six full-scale beam specimens and series of control specimens were tested. The adopted variables in this study are the number of internal concrete ribs and external U-shape CFRP strips at (45º). Experimental results show that the shear failure was the dominant failure for all tested beams. The cracking and ultimate load are reduced by about (19.6-30.6%) for the hollow beams specimens contains five and three ribs respectively compared with the reference beam. The ultimate load was increased for about (50.7%) for five internal ribs hollow beams strengthened by CFRP strips in compared with the same beams but without strengthening.  While, the ultimate load was increased for about (33.46%), for beam specimen who has three internal ribs and strengthened by CFRP, in comparison with the same beams but without strengthening.

Keywords: CFRP Strips, Shear, Continuous Beam, Self-Compacting Concrete, Hollow, Ribs

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ISSN (Paper)2224-5790 ISSN (Online)2225-0514

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