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Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/11350

Title: Shear behaviour of reinforced phyllite concrete beams
Authors: Adom-Asamoah, Mark
Owusu Afrifa, Russell
Issue Date: 21-Jul-2012
Publisher: Elsevier
Citation: Corresponding author. Tel.: +233 322060226; fax: +233 322060235. E-mail address: madom-asamoah.coe@knust.edu.gh (M. Adom-Asamoah).0261-3069/$ - see front matter 2012 Elsevier Ltd. All rights reserved. http://dx.doi.org/10.1016/j.matdes.2012.07.033
Abstract: The shear behaviour of concrete beams made from phyllite aggregates subjected to monotonic and cyclic loading is reported. First diagonal shear crack load of beams with and without shear reinforcement was between 42–58% and 42–92% of the failure loads respectively. The phyllite concrete beams without shear links had lower post-diagonal cracking shear resistance compared to corresponding phyllite beams with shear links. As a result of hysteretic energy dissipation, limited cyclic loading affected the stiffness, strength and deformation of the phyllite beams with shear reinforcement. Generally, beams with and without shear reinforcement showed anchorage bond failure in addition to the shear failure due to high stress concentration near the supports. The ACI, BS and EC codes are conservative for the prediction of phyllite concrete beams without shear reinforcement but they all overestimate the shear strength of phyllite concrete beams with shear reinforcement. It is recommended that the predicted shear capacity of phyllite beams reinforced with steel stirrups be modified by a reduction factor of 0.7 in order to specify a high enough safety factor on their ultimate strength. It is also recommended that susceptibility of phyllite concrete beams to undergo anchorage bond failure is averted in design by the provision of greater anchorage lengths than usually permitted.
URI: http://hdl.handle.net/123456789/11350
ISSN: 0261-3069
Appears in Collections:College of Engineering

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