Damage mechanism of rock fatigue

Erarslan, N. and Williams, D. J. (2012). Damage mechanism of rock fatigue. In: G. Narsilio, A. Arulrajah and J. Kodikara, ANZ 2012 Conference Proceedings. 11th Australia - New Zealand Conference on Geomechanics, Melbourne, Australia, (1502-1507). 15-18 July 2012.

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Name Description MIMEType Size Downloads
Author Erarslan, N.
Williams, D. J.
Title of paper Damage mechanism of rock fatigue
Conference name 11th Australia - New Zealand Conference on Geomechanics
Conference location Melbourne, Australia
Conference dates 15-18 July 2012
Proceedings title ANZ 2012 Conference Proceedings
Place of Publication Melbourne, Australia
Publisher Australia New Zealand Conference on Geomechanics
Publication Year 2012
Sub-type Poster
ISBN 9780646543017
Editor G. Narsilio
A. Arulrajah
J. Kodikara
Start page 1502
End page 1507
Total pages 6
Collection year 2013
Language eng
Abstract/Summary An understanding of the mechanics and mechanisms of brittle rock fracture is a key element in the solution of many engineering problems that involve rock structures. Some rock structures, such as bridge and dam abutments and foundations, and tunnel walls, undergo both static and cyclic loading caused by drilling and blasting, and vehicle-induced vibrations. This type of loading often causes rock to fail at a stress lower than its static strength, due to the effect of rock fatigue. While the mechanical behaviour of rock under static loading has been thoroughly investigated, rock behaviour under cyclic and repetitive loading has generally been neglected. Disc specimens of Brisbane tuff, the main rock type encountered during the excavation of the CLEM7 tunnel in Brisbane (Queensland, Australia), have been tested to investigate their Indirect Tensile Strength (ITS) response to both static and cyclic loading. Two different cyclic loading methods were used; namely, sinusoidal cyclic loading and cyclic loading with increasing mean level. The maximum reduction in ITS was found to be 33% on sinusoidal loading and 37% on increasing cyclic loading. In order to examine the major characteristics of the damage process at the microscopic level, Scanning Electron Microscopy (SEM) was used to view the surface of the main tensile fracture in specimens tested under both static and cyclic loading. The paper describes the results of the testing and SEM imaging.
Keyword Cyclic loading
Indirect tensile strength
Rock fatigue
Static loading
Q-Index Code EX
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Conference theme "Ground Engineering in a Changing World"

Document type: Conference Paper
Collections: School of Civil Engineering Publications
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Created: Thu, 04 Apr 2013, 11:41:21 EST by Ms Dulcie Stewart on behalf of School of Civil Engineering