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Influence of beam cross-section, loading arrangement and aggregate type on shear strength

Sagaseta, J and Vollum, RL (2011) Influence of beam cross-section, loading arrangement and aggregate type on shear strength MAGAZINE OF CONCRETE RESEARCH, 63 (2). 139 - 155. ISSN 0024-9831

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Abstract

This paper describes 14 tests on simply supported and continuous reinforced concrete beams which were designed to investigate the influences of aggregate type, loading arrangement and shear reinforcement ratio on shear strength. The beams were rectangular in cross-section with a/d ,∼ 3.5 (where a is the shear span and d the effective depth). Marine dredged gravel was used in ten beams (two without shear reinforcement) and limestone in the remaining four (two without shear reinforcement). The cracks typically passed around the gravel aggregate but through the limestone aggregate. Aggregate fracture was found only to reduce the shear strength of the beams without shear reinforcement. The factors of safety for shear failure implicit in Eurocode 2, BS 8110 and CSA A.23.3-04 are examined with data from this project and elsewhere. Eurocode 2 is shown to provide the lowest factor of safety for most beams. This is particularly significant for rectangular sections where Eurocode 2 can give lower factor of safety for shear than flexural failure which is undesirable. An amendment is proposed to address this.

Item Type: Article
Additional Information: Thomas Telford Ltd © 2011. Permission is granted by ICE Publishing to print one copy for personal use. Any other use of these PDF files is subject to reprint fees. The definitive version is available at http://www.cement-research.com
Uncontrolled Keywords: Science & Technology, Technology, Construction & Building Technology, Materials Science, Multidisciplinary, Materials Science, CONCRETE BEAMS, STIRRUPS, MEMBERS
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Divisions: Faculty of Engineering and Physical Sciences > Civil and Environmental Engineering
Depositing User: Symplectic Elements
Date Deposited: 23 Oct 2012 16:12
Last Modified: 23 Sep 2013 19:36
URI: http://epubs.surrey.ac.uk/id/eprint/713658

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