Bearing Strength of Concrete with and without FRP Confinement

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Title: Bearing Strength of Concrete with and without FRP Confinement

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Publication: CIA

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Date: 2/28/2011

Abstract:
Bearing strength of concrete is an important design requirement for concrete when it is used for foundations. Current knowledge indicates that the bearing strength of concrete is related to the compressive strength of concrete and increases with an increase in the ratio of total surface area to bearing area (known as bearing ratio). For a given bearing ratio, it is possible to increase the bearing strength of concrete through providing external confinement. This paper outlines the results of an experimental investigation on the bearing strength of carbon fibre reinforced polymer (CFRP) confined concrete. Application of CFRP wrapping to concrete specimens offered lateral confinement to the concrete. Three bearing ratio values of 2, 4 and 6 were used in this investigation. Analysis of the results showed that the CFRP confinement had increased the bearing strength of concrete up to 74% over the unconfined concrete. The CFRP confined concrete resisted load beyond failure of the concrete core as the CFRP confinement actively provided support. Failure of the confined concrete occurred in a brittle explosive manner with loud acoustic emission as the CFRP confinement experienced excessive tension in the hoop direction.


Concrete Institute of Australia, International Partner Access.

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