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Published: Građevinar 71 (2019) 6
Paper type: Original scientific paper
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Assessing influence of active and passive confinement on flexural behaviour of CFST beams

Morteza Naghipour, Marzieh Nemati, Javad Jalali, Mehdi Nematzadeh

Abstract

The aim of this study is to investigate the effect of active and passive confinement on the flexural behaviour of concrete-filled steel tubes. Three-point flexural test is carried out on twelve confined specimens. The main variable parameters are: tube diameter to thickness ratio (20, 30, and 60), compressive strength of concrete core (15 MPa and 45 MPa), and type of confinement (active or passive). The flexural capacity, energy absorption, flexibility and failure mode of confined specimens, as well as the cracking pattern of concrete core at failure point, are evaluated in this study. The results show that active confinement leads to lower ductile behaviour in specimens with higher strength of concrete core.

Keywords
concrete filled steel tubes, active and passive confinement, flexural behavior, absorbed energy

HOW TO CITE THIS ARTICLE:

Naghipour, M., Nemati, M., Jalali, J., Nematzadeh, M.: Assessing influence of active and passive confinement on flexural behaviour of CFST beams, GRAĐEVINAR, 71 (2019) 6, pp. 451-463, doi: https://doi.org/10.14256/JCE.1529.2015

OR:

Naghipour, M., Nemati, M., Jalali, J., Nematzadeh, M. (2019). Assessing influence of active and passive confinement on flexural behaviour of CFST beams, GRAĐEVINAR, 71 (6), 451-463, doi: https://doi.org/10.14256/JCE.1529.2015

LICENCE:

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This paper is licensed under a Creative Commons Attribution 4.0 International License.
Authors:
Morteza WEB
Morteza Naghipour
Babol Noshirvani University of Technology
Faculty of Civil Engineering
Marzieh Nemati WEB
Marzieh Nemati
Babol Islamic Azad University, Iran
Faculty of Civil Engineering
Javad Jalali WEB
Javad Jalali
Babol Noshirvani University of Technology
Faculty of Civil Engineering
Mahd WEBi
Mehdi Nematzadeh
The University of Mazandaran
Department of Civil Engineering