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|Title:||Analytical models for structural behaviour of fibre reinforced concrete beams with steel or FRP bars|
|Author:||Mohamed Sadakkathulla, M.A.|
|Citation:||Proceedings: Concrete – Innovation and Design, fib Symposium, 2015, 2015, pp.100-101|
|Conference Name:||fib Symposium, 2015 - Concrete – Innovation and Design (18 May 2015 - 20 May 2015 : Copenhagen)|
|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|
|Appears in Collections:||Aurora harvest 7|
Civil and Environmental Engineering publications
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