Performance-based optimization for strut-tie modeling of structural concrete

Liang, Qing Quan and Uy, Brian and Steven, Grant P. (2002) Performance-based optimization for strut-tie modeling of structural concrete. Journal of Structural Engineering, 128 (6). pp. 815-823. ISSN 0733-9445

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Abstract

[Abstract]: Conventional trial-and-error methods are not efficient in developing appropriate strut-and-tie models in complex structural concrete members. This paper describes a performance-based optimization (PBO) technique for automatically producing optimal strut-and-tie models for the design and detailing of structural concrete. The PBO algorithm utilizes the finite element method as a modeling and analytical tool. Developing strut-and-tie models in structural concrete is treated as an optimal topology design problem of continuum structures. The optimal strut-and-tie model that idealizes the load transfer mechanism in cracked structural concrete is generated by gradually removing regions that are ineffective in carrying loads from a structural concrete member based on overall stiffness performance criteria. A performance index is derived for evaluating the performance of strut-and-tie systems in an optimization process. Fundamental concepts underlying the development of strut-and-tie models are introduced. Design examples of a low-rise concrete shearwall with openings and a bridge pier are presented to demonstrate the validity and effectiveness of the PBO technique as a rational and reliable design tool for structural concrete.

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Item Type:	Article (Commonwealth Reporting Category C)
Refereed:	Yes
Item Status:	Live Archive
Additional Information:	Deposited with permissision of publisher. Link to published version provided by Publisher.
Depositing User:	Dr Stephen Liang
Faculty / Department / School:	Historic - Faculty of Engineering and Surveying - Department of Agricultural, Civil and Environmental Engineering
Date Deposited:	11 Oct 2007 01:12
Last Modified:	02 Jul 2013 22:46
Uncontrolled Keywords:	performance-based optimization, topology optimization, strut-and-tie models, structural concrete, finite element analysis
Fields of Research :	09 Engineering > 0905 Civil Engineering > 090506 Structural Engineering
Identification Number or DOI:	doi: 10.1061/(ASCE)0733-9445(2002)128:6(815)
URI:	http://eprints.usq.edu.au/id/eprint/2672

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