Title: Cyclic behaviour of cantilever RC columns with steel fibre reinforced concrete at plastic hinge regions

Authors: Dipti Ranjan Sahoo; Souvik Rakshit

Addresses: Department of Civil Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India ' Department of Civil Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India

Abstract: Steel fibre reinforced concrete (SFRC) has been used in a wide range of structural applications to improve the overall behaviour, energy absorption capacity, and damage tolerance of reinforced concrete (RC) members. This study aims at investigating the cyclic behaviour of concrete columns in which SFRC is used only at the expected plastic hinge regions. Three geometrically similar specimens, namely, one RC and two SFRC columns with fibre content of 0.75% and 1.0%, are tested under the reversed-cyclic lateral loading. The main objectives of this study are to determine the lateral strength, ductility, failure mechanism, and energy dissipation potential of test specimens. The addition of 0.75% steel fibres enhanced the lateral strength of columns by 25%. At the failure state, the RC specimen showed the formation of flexural plastic hinges near the footing. The addition of steel fibres at these locations improved the energy dissipation potential.

Keywords: energy dissipation; ductility; failure mechanisms; fibre reinforced concrete; steel FRC; lateral strength; cyclic behaviour; cantilever columns; flexural plastic hinges; structural engineering; energy absorption; damage tolerance; concrete columns; steel fibres.

DOI: 10.1504/IJSMSS.2016.078707

International Journal of Sustainable Materials and Structural Systems, 2016 Vol.2 No.3/4, pp.208 - 221

Received: 07 Feb 2015
Accepted: 17 Nov 2015
Published online: 01 Sep 2016 *

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