The Structural Engineer > Archive > Volume 75 (1997) > Issues > Issue 18 > Ductility in Reinforced Concrete: Why is it Needed and How is it Acheived?
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Ductility in Reinforced Concrete: Why is it Needed and How is it Acheived?

This paper considers the reasons for requiring that reinforced concrete sections have ductility and recent research on the factors influencing ductility. This work has shown that the rotation capacity may be considerably lower than assumed from earlier research owing to rupture of the reinforcement prior to crushing of the concrete. An investigation carried out at the University of Leeds is described which examined the influence of the form of the post-yield stress-strain response of reinforcement on the rotation capacity of sections. It is shown that there are two modes of failure: a relatively brittle failure where only one crack forms in the hinge region and a more ductile failure where multiple cracks form. The consequences of the research for design are discussed. Professor A.W. Beeby

Author(s): Beeby, A W

Keywords: ductility;reinforced concrete;cracking;research;robustness;history;codes of practice;rotation capacity;reinforcement