UNSPECIFIED (2000) Computational approach to localization using global energy minimization. COMPUTERS & STRUCTURES, 78 (4). pp. 529-536. ISSN 0045-7949

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Abstract

Damage localization induced by strain softening can be predicted by the direct minimization of a global energy function [Baker G, Hunt GW. In: Bazant ZP, et al., editors. Damage of Quasi-brittle Structures. London: E and FN Spon, 1994. p. 387-94; Hunt GW, Baker G. J Mech Phys Solids 1995;43(7):1127-50]. This article concerns the computational strategy for implementing this principle for softening materials such as concrete. Instead of using heuristic global optimization techniques, our strategies are a hybrid of local optimization methods with a path-finding approach to ensure a global optimum. With admissible nodal displacements being independent variables, it is easy to deal with the geometric (mesh) constraint conditions. The direct search optimization methods recover the localized solutions for a range of softening lattice models which are representative of the quasi-brittle structures. (C) 2000 Elsevier Science Ltd. All rights reserved.

Item Type:	Journal Article
Subjects:	Q Science > QA Mathematics > QA76 Electronic computers. Computer science. Computer software T Technology > TA Engineering (General). Civil engineering (General)
Journal or Publication Title:	COMPUTERS & STRUCTURES
Publisher:	PERGAMON-ELSEVIER SCIENCE LTD
ISSN:	0045-7949
Date:	December 2000
Volume:	78
Number:	4
Number of Pages:	8
Page Range:	pp. 529-536
Publication Status:	Published
URI:	http://wrap.warwick.ac.uk/id/eprint/12918

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