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Dr. Gamal Taher Fahmy :: Publications:

Title:
BEHAVIOR OF RC BEAMS WITH STRENGTHENED OPENINGS IN D-REGION
Authors: Y.H. HAMMAD, G.T. ABDEL-RAHMAN, M. SAID
Year: 2003
Keywords: Not Available
Journal: Proc. of the 9 th Arab Structural Engineering Conf
Volume: Not Available
Issue: Not Available
Pages: Not Available
Publisher: Not Available
Local/International: International
Paper Link: Not Available
Full paper gamal.fahmy_Behavior of RC Beams with Strengthened Openings in D-Region.pdf
Supplementary materials Not Available
Abstract:

Provision of openings in serviceable rein forced concrete beams may result in a substantial decline in the beam’s capacity and integrity; pointing out the necessity of opening strengthening. The present study investigates the response of reinforced concrete T-beams with strengthened openings disposed in shear span. The experimental program consisted of four large-scale beam specimens. An opening in the web of 100-mm x 300-mm was centrally disposed in the shear span. The strengthening of the openings was achieved using mild steel strips of 3.0-mm thick or uni-directional CFRP fabrics. All specimens were tested as simple beams subjected to two-points loading with a shear span to effective depth ratio of 1.7. The load was incrementally applied following a specified displ acement history. Test results indicated that the strengthening of openings may offset the anticipated decline in the beam capacity a nd stiffness due to the existence of the openings. The extent of offset is dependent on the strengthening scheme adopted. The gain in shear capacity of the tested beams ranged fro m 48% to 100%. In addition, a non-linear finite element analysis; NLFEA was carried out to investigate the ultimate behavior of the beam specimens. The application of NLFEA for the strength prediction of the tested beams yielded adequate results.

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