Flexural Deformability of Reinforced Concrete Beams
Publication: Journal of Structural Engineering
Volume 124, Issue 9
Abstract
In reinforced concrete beams, the sectional definition of the moment-curvature relationship is not straightforward owing to the presence of cracks. In general, this problem has been solved by considering a representative portion of the beam and by defining the curvature 1/r as the ratio between the rotation of the portion considered and its length. Large portions of the beam with many cracks lead to “average” moment-curvature relationship, while small portions delimited by two consecutive flexural cracks lead to “local” moment-curvature relationship. The difference between these two definitions is studied in this paper introducing a “general model.” With this model the entire beam is modeled through a succession of blocks divided by flexural cracks taking into account the bond between steel and concrete. Due to the practical impossibility of univocal definition of the crack pattern evolution, it is proposed to use a “range model.” This “range,” delimited by the curves of maximum and minimum deformability, includes the moment-curvature relationship (locals and average) obtained from all possible crack patterns.
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Information & Authors
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Published In
Journal of Structural Engineering
Volume 124 • Issue 9 • September 1998
Pages: 1041 - 1049
Copyright
Copyright © 1998 American Society of Civil Engineers.
History
Published online: Sep 1, 1998
Published in print: Sep 1998
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