Simple Plastic Model for Shear Critical SFRC Beams
Publication: Journal of Structural Engineering
Volume 136, Issue 4
Abstract
A simple physical model, for prediction of ultimate shear strength of steel fiber-reinforced concrete (SFRC) beams is developed on the basis of a plastic approach originally proposed for reinforced concrete beams without stirrups. It is founded on the hypothesis that cracks can be transformed into yield lines, and thus is know as crack sliding model (CSM). First, the CSM is improved to take into account the shear strength increase for deep beams, due to the arch effect. Then, the effectiveness factors for fibrous concrete under biaxial stresses are evaluated, taking into account the postcracking tensile strength of SFRC and its ability to control slippage along shear cracks. With the aim of providing a handy and fast tool for design of SFRC beams without stirrups, a simplified design model is also derived. Finally, the proposed models are validated by the results of a large set of experimental tests taken from literature.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 136 • Issue 4 • April 2010
Pages: 390 - 400
Copyright
© 2010 ASCE.
History
Received: Oct 30, 2008
Accepted: Sep 7, 2009
Published online: Oct 8, 2009
Published in print: Apr 2010
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