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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: Sensitivity Study of Reinforced Concrete Simple Beams
Author(s): Robert E. Abendroth and Charles G. Salmon
Publication: Journal Proceedings
Appears on pages(s): 764-771
Keywords: beams (supports); costs; economics; optimization; reinforced concrete;structural analysis; structural design.
Abstract:Design of uniformly loaded reinforced concrete beams by conventional methods will not result in a unique solution. To obtain an economical design, with respect to the in-place cost of the construction materials, the principles of reinforced concrete strength design and a nonlinear optimization routine are applied. Parameter studies for simply supported rectangular beams are presented to show the sensitivity of allowable deflection, material strength, and unit material cost variation upon the resulting optimum design. The design variables are the beam width, effective depth, area of tension reinforcement, and area of compression reinforcement. Continuous constraint functions limit the cross section size and areas of reinforcement and describe the shear strength, flexural strength, and deflection of the beam. This paper concludes with guidelines for economical simply supported rectangular beam design that are based upon the results of the parameter sensitivity studies.
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