Compressive behavior of axially loaded circular hollow concrete columns reinforced with GFRP bars and spirals

Alajarmeh, O. S. and Manalo, A. C. and Benmokrane, B. and Karunasena, W. and Mendis, P. and Nguyen, K. T. Q. (2019) Compressive behavior of axially loaded circular hollow concrete columns reinforced with GFRP bars and spirals. Construction and Building Materials, 194. pp. 12-23. ISSN 0950-0618


Abstract

This study explored the use glass-fiber-reinforced-polymer
(GFRP) bars and spirals as reinforcing materials in hollow concrete columns in order to mitigate steel-related corrosion problems and understand the fundamental behavior of such construction system under the applied loads. Four concrete columns 250 mm in external diameter and reinforced longitudinally with six 15.9 mm diameter GFRP bars were cast with different inner diameters (0, 40, 65, and 90 mm) and tested under concentric axial loading. Based on the experimental results, increasing the inner-to-outer diameter ratio up to 0.36 in hollow GFRP reinforced columns changed the failure behavior from brittle to pseudo-ductile. Moreover, the hollow GFRP reinforced columns exhibited higher deformation capacity and higher confinement efficiency compared to the GFRP reinforced solid columns and steel-reinforced hollow columns. A theoretical model considering the confined-concrete compressive strength and axial strain of 0.0025 in longitudinal GFRP bars can accurately predict the axial-load capacity of hollow concrete columns.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Permanent restricted access to Published version, in accordance with the copyright policy of the publisher.
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences - Centre for Future Materials (1 Jan 2017 -)
Faculty/School / Institute/Centre: Current - Faculty of Health, Engineering and Sciences - School of Civil Engineering and Surveying (1 July 2013 -)
Date Deposited: 16 Dec 2019 04:38
Last Modified: 28 Jan 2020 23:45
Uncontrolled Keywords: hollow column; reinforced concrete; GFRP bar; GFRP spiral; inner-to-outer diameter ratio; concentric load
Fields of Research : 09 Engineering > 0905 Civil Engineering > 090506 Structural Engineering
01 Mathematical Sciences > 0102 Applied Mathematics > 010207 Theoretical and Applied Mechanics
Identification Number or DOI: 10.1016/j.conbuildmat.2018.11.016
URI: http://eprints.usq.edu.au/id/eprint/35438

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