Part 1: Section Analysis (STRUCTURE, April 2023) presented a general framework for flexural analysis of singly reinforced and doubly reinforced beam sections. In this Part 2: Section Design, flexural design of singly reinforced and doubly reinforced beam sections is studied. The focus is on general sections instead of rectangular sections only. Although it may be adequate to design beam sections using a trial-and-error approach based on the section analysis steps outlined in Part 1, the design approach presented in this article determines the minimum required steel area to support a given factored bending moment.
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Author Archives : Shahriar Quayyum, Ph.D., P.E.
is a visiting Assistant Professor in the Department of Civil and Environmental Engineering at Manhattan College, Riverdale, NY.
Flexural analysis and design of beam sections are fundamental topics in reinforced concrete structures. However, many engineers and students have difficulty generalizing the basic analysis and design principles into more general and complex cross-sectional shapes other than simple rectangular cross-sections. This article presents the flexural analysis and design of general beam sections in a rigorously derived framework and builds a foundation for their design. Part 1: Section Analysis focuses on the flexural strength calculation (analysis) of any given beam section. Part 2: Section Design focusing on the flexural design aspects of beam sections will run in a future article.
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