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A design model for punching shear of FRP-reinforced slab-column connections

Theodorakopoulos, D.D. and Swamy, R.N. (2008) A design model for punching shear of FRP-reinforced slab-column connections. Cement and Concrete Composites, 30 (6). pp. 544-555. ISSN 0958-9465

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Abstract

The overall aim of this paper is to develop a unified design method for the punching shear resistance of slab-column connections irrespective of the type of internal reinforcement. In the first part of the paper a design model for the punching shear resistance of concrete slab-column connections reinforced with fibre-reinforced polymers (FRP) is proposed. This design model is based on the authors’ theoretical analysis for such slabs, which considers the physical behavior of the connections under load. The effects of the inherent linear brittle response, the lower elastic modulus and the different bond features, as compared to steel, of the FRP reinforcement are all accounted for in the present study. The proposed model does not incorporate any fitting factors to match the theory to the trend of the available FRP slab test results. The excellent agreement between the predicted and published test results should give confidence to engineers and designers in using FRP as a sound structural reinforcement for slab-column connections.

It is then shown that the proposed design model for FRP slabs and the previous model of the authors for steel reinforced slabs are both identical in nature and structure, thus constituting a unified approach to design for punching shear in slabs. On the basis of the unified model comparison and correlation between an FRP slab and a reference steel reinforced slab, confirmed by the available test results, are presented. The unified model also enables the development of a more rational and reliable equivalent steel reinforcement ratio which can be applied to existing code equations for steel reinforced slabs to estimate the punching resistance of FRP-reinforced slabs.

Item Type: Article
Copyright, Publisher and Additional Information: © 2008 Elsevier Ltd. This is an author produced version of a paper published in Cement and Concrete Composites. Uploaded in accordance with the publisher's self archiving policy.
Academic Units: The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Mechanical Engineering (Sheffield)
Depositing User: Sherpa Assistant
Date Deposited: 12 Aug 2008 15:43
Last Modified: 08 Feb 2013 16:56
Published Version: http://dx.doi.org/10.1016/j.cemconcomp.2007.10.003
Status: Published
Publisher: Elsevier Ltd.
Refereed: Yes
Identification Number: 10.1016/j.cemconcomp.2007.10.003
URI: http://eprints.whiterose.ac.uk/id/eprint/4082

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