Title: The Impact of 500 MPA Reinforcement on the Ductility of Concrete Structures – Revision of AS3600

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Publication: CIA

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Date: 2/13/2011

Abstract:
The relatively low uniform elongation of 500 MPa steel reinforcement has significant implications in the design and behaviour of reinforced concrete structures, particularly with regard to ductility. Fracture of the tensile steel will be the common failure mechanism in many under-reinforced beams and slabs and the usual assumptions made in ultimate strength design and analysis are in question. The ability of structures to redistribute internal actions at the ultimate limit state will be compromised. This paper addresses some of these design problems, their impact on current practice and design methodologies, and some recent and relevant changes to AS3600.