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Type: Conference paper
Title: Analytical models for structural behaviour of fibre reinforced concrete beams with steel or FRP bars
Author: Mohamed Sadakkathulla, M.A.
Sheikh, A.H.
Oehlers, D.J.
Visintin, P.
Citation: Proceedings: Concrete – Innovation and Design, fib Symposium, 2015, 2015, pp.100-101
Issue Date: 2015
ISSN: 2617-4820
Conference Name: fib Symposium, 2015 - Concrete – Innovation and Design (18 May 2015 - 20 May 2015 : Copenhagen)
Statement of
M.S. Mohamed Ali, A.H. Sheikh, D.J. Oehlers and P. Visintin
Abstract: Fibre reinforced concrete (FRC) offers an improved resistance to cracking and crack propagation, which leads to increased strength and toughness in flexure. As there is a lack of understanding of structural behaviour of FRC,this paper reports a study on the influence of fibres on the behaviour of flexural members, and it focuses on a partial-interaction structural mechanics model for the deflection calculation of concrete beams reinforced with steel or FRP bars and fibres. For this, a model is developed to incorporate fibres into both tension and compression regions in generating moment-rotation response and also on crack formation and the tension-stiffening mehanism. For calibrating these models an experimental study on the bond-slip relationship between FRP bars and fibre concrete was required for the tension stiffening analysis; and an experimental study on the slip-crack width relationship between fibres and concrete required for the moment-rotation model. The moment-rotation and tension stiffening models were then used to obtain the load deflection (P-Δ) response through integration of discrete rotations at the determined crack locations throughout the member. The theoretical load-deflection responses are compared to the experimental results, showing very good correlation for the ultimate flexural capacity and the ductility of PVA fibre reinforced concrete members.
Keywords: Fibre reinforced concrete beam; FRP reinforcement; bond-slip characteristics; tension stiffening; moment-rotation; ductility; load-deflection
Rights: Copyright status unknown
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Civil and Environmental Engineering publications

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