Model to Simulate the Contribution of Fiber Reinforcement for the Punching Resistance of RC Slabs
Publication: Journal of Materials in Civil Engineering
Volume 26, Issue 7
Abstract
In this paper analytical formulations are developed for predicting the punching resistance of flat slabs of steel fiber–reinforced concrete (SFRC) flexurally reinforced with steel bars. By performing statistical analysis with a database that collects experimental results on the characterization of the postcracking behavior of SFRC, equations are determined for evaluating the residual flexural tensile strength parameters () from fundamental data that characterize steel fibers. The strength parameters proposed by CEB-FIP 2010 were used for the definition of the stress-crack width law () that simulates the fiber-reinforcement mechanisms in cement-based materials. The second part of the paper describes an analytical formulation based on the concepts proposed by Muttoni and Ruiz, where the law is conveniently integrated for simulation of the contribution of steel fibers for the punching resistance of SFRC slabs. By using a database composed of 154 punching tests with SFRC slabs, the good predictive performance of the developed proposal is demonstrated. The good performance of this model is also evidenced by comparing its predictions to those from other models.
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Acknowledgments
The study presented in this paper is a part of the research project titled SlabSys-HFRC—Flat slabs for multi-storey buildings using hybrid reinforced self-compacting concrete: an innovative structural system, with reference number of PTDC/ECM/120394/2010. The first author acknowledges the support provided by the CAPES and CNPq grant, and the grant provided by the project SlabSys.
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Published In
Journal of Materials in Civil Engineering
Volume 26 • Issue 7 • July 2014
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Feb 25, 2013
Accepted: Jul 31, 2013
Published online: Aug 3, 2013
Published in print: Jul 1, 2014
Discussion open until: Aug 28, 2014
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