Seismic response of steel fibre reinforced concrete beam-column joints

Article


Abbas, A., Syed Mohsin, Sharifah M. and Cotsovos, Demetrios M. 2014. Seismic response of steel fibre reinforced concrete beam-column joints. Engineering Structures. 59 (Feb14), pp. 261-283.
AuthorsAbbas, A., Syed Mohsin, Sharifah M. and Cotsovos, Demetrios M.
Abstract

The present research work aims to investigate numerically the behaviour of steel fibre
reinforced concrete beam-column joints under seismic action. Both exterior and interior joint
types were examined and 3D nonlinear finite element analyses were carried out using
ABAQUS software. The joints were subjected to reversed-cyclic loading, combined with a
constant axial force on the column representing gravity loads. The joints were initially
calibrated using existing experimental data – to ascertain the validity of the numerical model
used – and then parametric studies were carried out using different steel fibre ratios coupled
with increased spacing of shear links. The aim was to assess the effect of introducing steel
fibres into the concrete mix in order to compensate for a reduced amount of conventional
transverse steel reinforcement and hence lessen congestion of the latter. This is particularly
useful for joints designed to withstand seismic loading as code requirements (e.g. Eurocode
8) lead to a high amount of shear links provided to protect critical regions. The spacing
between shear links was increased by 0%, 50% and 100%, whilst the fibre volume fraction (Vf)
was increased by 0%, 1%, 1.5%, 2% and 2.5%. Potential enhancement to ductility, a key
requirement in seismic design, was investigated as well as potential improvements to energy
absorption and confinement. The work also examined key structural issues such as strength,
storey drift, plastic hinges formation and cracking patterns.

Keywordssteel fibres; beam-column joints; finite-element analysis
JournalEngineering Structures
Journal citation59 (Feb14), pp. 261-283
ISSN0141-0296
Year2014
PublisherElsevier
Accepted author manuscript
License
CC BY-NC-ND
Web address (URL)http://www.sciencedirect.com/science/article/pii/S0141029613005257
Publication dates
PrintFeb 2014
Publication process dates
Deposited18 Nov 2013
Copyright informationNOTICE: this is the author’s version of a work that was accepted for publication in Engineering Structures. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version will be published in Engineering Structures with the DOI:10.1016/j.engstruct.2013.10.046
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