Experimental and numerical evaluation of the compression behaviour of GFRP-wrapped infill materials

Otoom, Omar F. and Lokuge, Weena ORCID: https://orcid.org/0000-0003-1370-1976 and Karunasena, Warna ORCID: https://orcid.org/0000-0003-3636-3068 and Manalo, Allan C. ORCID: https://orcid.org/0000-0003-0493-433X and Ozbakkaloglu, Togay and Thambiratnam, David (2021) Experimental and numerical evaluation of the compression behaviour of GFRP-wrapped infill materials. Case Studies in Construction Materials, 15:e00654.

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Glass Fibre Reinforced Polymer (GFRP) composite wrap has become an effective repair system for deteriorated structural columns. It is essential to provide an infill material in the gap between the retrofitted column and the GFRP wrap. So, the properties of the infill material can significantly influence the contribution of these wraps and thus, can affect the overall performance of the retrofitted structure. However, the research on the effect of GFRP confinement on infill materials with various properties is still limited. This study explores the effectiveness of the GFRP wrapping system and its contribution to the axial compression behaviour of concrete, grout and epoxy infill materials. A total of 18 unconfined and GFRP-wrapped cylindrical columns were cast and tested under concentric axial compression loading. A finite element (FE) modelling was implemented using ABAQUS software to analyse the compression behaviour of GFRP-wrapped infill materials. The experimental results demonstrated that the confinement effect of the GFRP wrapping system is highly influenced by the properties of the infill material. The compressive strength and modulus of elasticity significantly increased due to GFRP wrapping by 149 % and 77 %, respectively for concrete infill, and by 40 % and 72 %, respectively for grout infill whereas negligible confinement efficiency observed in wrapped epoxy infill. The FE analyses showed a good correlation with the experimental results in predicting the overall compressive behaviour of the various infill materials. This study demonstrates valuable insights on the confinement effect of GFRP wraps in the repair of columns involving infill materials which therefore could be employed to better understand the overall behaviour of columns retrofitted with GFRP wrapping systems.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Faculty/School / Institute/Centre: Historic - Faculty of Health, Engineering and Sciences - School of Civil Engineering and Surveying (1 Jul 2013 - 31 Dec 2021)
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences - Centre for Future Materials (1 Jan 2017 -)
Date Deposited: 01 Sep 2021 02:55
Last Modified: 10 Aug 2022 01:31
Uncontrolled Keywords: GFRP-wrapped infill; axial compression; material characterization; finite element modelling; parametric study
Fields of Research (2008): 09 Engineering > 0905 Civil Engineering > 090503 Construction Materials
09 Engineering > 0912 Materials Engineering > 091202 Composite and Hybrid Materials
09 Engineering > 0912 Materials Engineering > 091209 Polymers and Plastics
Fields of Research (2020): 40 ENGINEERING > 4016 Materials engineering > 401609 Polymers and plastics
40 ENGINEERING > 4016 Materials engineering > 401602 Composite and hybrid materials
40 ENGINEERING > 4005 Civil engineering > 400505 Construction materials
Socio-Economic Objectives (2008): B Economic Development > 87 Construction > 8705 Building Management and Services > 870501 Civil Building Management and Services
Socio-Economic Objectives (2020): 12 CONSTRUCTION > 1205 Construction processes > 120501 Civil construction processes
12 CONSTRUCTION > 1203 Construction materials performance and processes > 120304 Polymeric materials and paints
Funding Details:
Identification Number or DOI: https://doi.org/10.1016/j.cscm.2021.e00654
URI: http://eprints.usq.edu.au/id/eprint/43469

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