An energy model for bifurcation analysis of a double-notched concrete panel: continuum model

Chen, Guangnan and Baker, Graham (2003) An energy model for bifurcation analysis of a double-notched concrete panel: continuum model. Advances in Structural Engineering, 6 (1). pp. 45-51. ISSN 1369-4332

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Abstract

In this paper, the uni-axial tension of double-notched concrete specimens is analyzed by using a continuum plasticity model. As in a companion paper, the concept of minimization of the second-order energy is used as the criterion for judging a bifurcation. The energy computation is formulated in standard continuum plasticity. The analysis confirms that the unsymmetrical crack propagation (i.e. strains localizing on one side of the specimen) may occur either before or after the peak load. Influences on bifurcation of three factors, the notch depth to panel width, the local constitutive law, and the ratio of the panel width to panel length are investigated. A larger ratio of the notch depth to panel width, a steeper softening constitutive law, and a smaller ratio of the panel width to panel length, leads to an earlier bifurcation. These conclusions are consistent with those obtained from a simplified model.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Paper to be obtained which may be deposited with blanket permission of publisher.
Depositing User: epEditor USQ
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - Department of Agricultural, Civil and Environmental Engineering
Date Deposited: 18 May 2010 00:54
Last Modified: 28 Jul 2011 23:01
Uncontrolled Keywords: bifurcation analysis; continuum model; crack propagation; double-notched concrete panel; energy minimization; strain softening
Fields of Research (FOR2008): 09 Engineering > 0905 Civil Engineering > 090503 Construction Materials
09 Engineering > 0905 Civil Engineering > 090506 Structural Engineering
Socio-Economic Objective (SEO2008): E Expanding Knowledge > 97 Expanding Knowledge > 970109 Expanding Knowledge in Engineering
Identification Number or DOI: doi: 10.1260/136943303321625720
URI: http://eprints.usq.edu.au/id/eprint/8118

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