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Founded in 1904 and headquartered in Farmington Hills, Michigan, USA, the American Concrete Institute is a leading authority and resource worldwide for the development, dissemination, and adoption of its consensus-based standards, technical resources, educational programs, and proven expertise for individuals and organizations involved in concrete design, construction, and materials, who share a commitment to pursuing the best use of concrete.
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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: Shear Failure of Reinforced Concrete Beams
Author(s): Alexander Placas and Paul E. Regan
Publication: Journal Proceedings
Appears on pages(s): 763-773
Keywords: beams (supports); crack width and spacing; diagonal tension; I-beams; rectangular beams; reinforced concrete; research; shear strength; T-beams; web reinforcement.
Abstract:An extensive test program for the investigation of the shear resistance of reinforced concrete beams was carried out. Sixty-three T, I, and rectangular beams with varying cross section, web reinforcement, longitudinal reinforcement, concrete strength, and shear span were tested. Study of these and other results lead to the classification of shear failures into four basic modes. These modes are described and equations developed for the calculation of collapse loads for failures by diagonal tension, shearing, shear compression, and web crushing. The ultimate load in a given case is intrinsic to the failure mode corresponding to the least strength after diagonal cracking. A formula for calculating shear crack width is presented.
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