The Effect of Reinforcement Ratio on the Compressive Behaviour of Glass Fibre Reinforced Polymer (GFRP) reinforced Concrete Columns with Hollow Composite Reinforcing Section (HCRS)

Ng, Michael (2019) The Effect of Reinforcement Ratio on the Compressive Behaviour of Glass Fibre Reinforced Polymer (GFRP) reinforced Concrete Columns with Hollow Composite Reinforcing Section (HCRS). [USQ Project]

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Abstract

Steel reinforcing bars are the most common and effective reinforcement for concrete structures. However, steel corrosion in concrete has been a significant problem in some environments as concrete deterioration reduces the life of structures and involves high repair costs as a result; most of all, it can endanger the integrity of the structures and affect other elements of construction.

In recent years, fibre reinforced polymer has been used as an alternative reinforcement, offering a number of advantages over steel especially when used in marine and other harsh environments. The most common type of fibre polymer material is glass fibre reinforced polymers (GFRP) as they are cost effective and corrosion resistant. In some standards, however, suggested that using GFRP bars as longitudinal reinforcement is not recommended due to its low compressive strength and few researches have been conducted to examine its credentials.

The objective of this study is to investigate the stress/strain strength and the failure mode of the concrete columns with different reinforcement ratios. A total of three hollow concrete columns reinforced longitudinally with GFRP bars with different reinforcement ratios (1.74%, 2.6% and 3.47%) and hollow composite reinforcing system (HCRS) were prepared. The different reinforcement ratios were achieved by placing different number of 15.9mm diameter GFRP bars (4, 6 and 8 bars respectively).

Hollow concrete columns were tested in this study. Hollow columns are considered to be a structurally efficient construction system due to the cost saving by decreased section area. A hollow composite reinforcing system (HCRS) was placed in each column to provide reinforcement in both longitudinal and transverse directions. HCRS are made by GFRP tubes with four studs attached to the full length of the hollow section to enhance the bonding between concrete and the HCRS.

To date, limited researches have been conducted on the concrete columns reinforced with GFRP combined with HCRS. Therefore, this study focused on the compressive behaviour of this innovative reinforcing system under concentric axial load.


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Item Type: USQ Project
Item Status: Live Archive
Additional Information: Bachelor of Civil Engineering
Faculty/School / Institute/Centre: Current - Faculty of Health, Engineering and Sciences - School of Civil Engineering and Surveying (1 Jul 2013 -)
Faculty/School / Institute/Centre: Current - Faculty of Health, Engineering and Sciences - School of Civil Engineering and Surveying (1 Jul 2013 -)
Supervisors: Manalo, Allan; AlAjarmeh, Omar
Date Deposited: 10 Aug 2021 05:38
Last Modified: 10 Aug 2021 05:38
Uncontrolled Keywords: reinforcement ratio, compressive behaviour, glass fibre reinforced polymers (GFRP), hollow composite reinforcing system (HCRS)
URI: http://eprints.usq.edu.au/id/eprint/43092

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