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Title: Axial compression tests on large-scale FRP-confined RC columns
Authors: Zhang, YX
Teng, JG 
Lam, L
Issue Date: 2010
Source: Proceedings of the 2nd International Postgraduate Conference on Infrastructure and Environment, IPCIE 2010, 2010, v. 2, p. 377-384
Abstract: To enable the safe and reliable design of confining FRP jackets for the strengthening of RC columns, the stress- strain behaviour of FRP-confined concrete needs to be properly understood and modelled. While numerous studies have been conducted on FRP-confined concrete using small-scale FRP-confined plain concrete specimens, uncertainties and concerns exist with regard to the direct extrapolation of conclusions reached in these studies to the behaviour of FRP-confined concrete in large-scale reinforced concrete (RC) columns on which there has been very limited work. Against this background, this paper presents the test results of part of an ongoing experimental programme on large-scale FRP-confined RC columns. The entire experimental programme comprising 16 axial compression tests on large-scale RC columns is first descried. Details of the four tests already completed are then reported and the results discussed. These results confirm the expected benefits of FRP confinement of RC columns in enhancing both their strength and ductility. As with small-scale plain concrete specimens, the hoop rupture strain of an FRP jacket in a large-scale RC column is much lower than the material ultimate tensile strain from flat coupon tests; this reduction appears to be more severe in large RC columns than in small plain concrete specimens. The completed tests have also shown that the instrumentation scheme needs to be refined in fixture tests to better capture the development of strains in the FRP jacket.
Keywords: Compression
Large-scale columns
RC columns
Stress-strain behaviour
ISBN: 9789881731135
Description: 2nd International Postgraduate Conference on Infrastructure and Environment, IPCIE 2010, Hong Kong, 1-2 June 2010
Appears in Collections:Conference Paper

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