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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: Design Method for Reinforced Concrete Beams with Large Openings
Author(s): M. A. Mansur, K. H. Tan, and S. L. Lee
Publication: Journal Proceedings
Appears on pages(s): 517-524
Keywords: beams (supports); bending moments; cracking (fracturing); deflection; loads (forces); openings; reinforced concrete; shear properties; strains; strength ; structural design; tests .
Abstract:A rational design method is proposed for reinforced concrete beams with large rectangular openings that are subjected to bending and shear. Twelve beams designed by the proposed method were tested under a point load. The major variables were the length, depth, eccentricity and location of openings, and the amount and arrangement of corner reinforcement. Test results indicate that the method is satisfactory. Diagonal bars as corner reinforcement were found to be more effective in crack and deflection control than vertical stirrups. Based on the test results, a suitable quantity of corner reinforcement is recommended.
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