Design of Prestressed Concrete Beams with Openings
Publication: Journal of Structural Engineering
Volume 121, Issue 5
Abstract
Web openings in beams occur quite often in practice to provide convenient passage of environmental services. As a result, story heights in buildings can be reduced resulting in major cost savings. In this paper the nonlinear analysis and design of simply supported posttensioned prestressed concrete beams with rectangular openings are presented. Several design parameters are varied such as: opening width and depth, horizontal and vertical locations of the opening, and type of cross section. The results from a nonlinear finite-element analysis are substantiated by test results from 13 unbonded posttensioned prestressed concrete beams, six of which are rectangular in section, five are T-section, and the remaining two are I-section. Good agreement is shown between the theoretical and the experimental results. The effect of the openings on the behavior of such beams at different stages of loading is presented. A simple design method for estimating the ultimate failure load for each type of failure mode is proposed. An illustrative design example is presented.
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References
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 121 • Issue 5 • May 1995
Pages: 890 - 898
Copyright
Copyright © 1995 American Society of Civil Engineers.
History
Published online: May 1, 1995
Published in print: May 1995
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