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https://hdl.handle.net/2440/101973
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 Responsibility: | 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 |
Published version: | http://fibcopenhagen2015.dk/ |
Appears in Collections: | Aurora harvest 7 Civil and Environmental Engineering publications |
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