Title:
Minimum Reinforcement in High Strength Concrete Beams
Author(s):
I.A.E.M. Shehata, L.C.D Shehata, and S.L.G. Garcia
Publication:
Symposium Paper
Volume:
207
Issue:
Appears on pages(s):
279-296
Keywords:
beams; ductility; high-strength concrete; minimum shear reinforcement
DOI:
10.14359/12396
Date:
10/7/2002
Abstract:
Lightly reinforced concrete beams fail in a brittle manner, due to steel fracture soon after cracking. In order to avoid such a brittle failure and provide certain ductility at failure, codes of practice give formulae for minimum longitudinal and transverse reinforcement. This reinforcement is meant to resist loads in excess of the first crack load and ensure that several cracks form before failure. These design provisions are based mainly on empirical studies and different code formulae lead to quite different amounts of minimum reinforcement, particularly for high strength concrete beams. In this article, the minimum shear reinforcement ratio of beams with different concrete strength is discussed on the basis of theoretical considerations and experimental results from this work and others.