Flexural Modeling of Steel Fiber-Reinforced Concrete Members: Analytical Investigations
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VIEW CORRECTIONPublication: Practice Periodical on Structural Design and Construction
Volume 20, Issue 4
Abstract
This paper presents an analytical model for the determination of the ultimate flexural capacity of steel fiber-reinforced (SFR) concrete rectangular sections and their associated crack width using the principles of strain compatibility and force equilibrium. The proposed model considers an elastic perfect-plastic model for compression and an elastic constant postpeak response of SFR concrete in tension. Unlike other flexural models available in the literature, the proposed model considers in the analysis the random distribution and orientation of steel fibers at a cracked section. The model was verified using existing experimental results, and it fairly predicted the flexural capacity of the SFR concrete beams. A parametric study using the proposed model was conducted to assess the effect of the fiber parameters and the strength of the concrete on the ultimate flexural capacity of a section and its associated crack widths. A normalized design chart is also presented to simplify the analysis procedure, and this can be used in the selection of fiber parameters (volume fraction and aspect ratio) during flexural design of SFR concrete members.
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Acknowledgments
The work presented in this paper was supported by a grant under the Research Award of the University Grant Commission, New Delhi, India. The author expresses his heartiest appreciation for all those at Guru Nanak Dev Engineering College, Ludhiana, who rendered help and support in this research project. This help is greatly appreciated and acknowledged.
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Practice Periodical on Structural Design and Construction
Volume 20 • Issue 4 • November 2015
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© 2014 American Society of Civil Engineers.
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Received: Feb 4, 2014
Accepted: Aug 1, 2014
Published online: Sep 5, 2014
Published in print: Nov 1, 2015
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