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

Article


Liang, Qing Quan, 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. https://doi.org/10.1061/(ASCE)0733-9445(2002)128:6(815)
Article Title

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

ERA Journal ID36383
Article CategoryArticle
AuthorsLiang, Qing Quan (Author), Uy, Brian (Author) and Steven, Grant P. (Author)
Journal TitleJournal of Structural Engineering
Journal Citation128 (6), pp. 815-823
Number of Pages9
Year2002
Place of PublicationUnited States
ISSN0733-9445
1943-541X
Digital Object Identifier (DOI)https://doi.org/10.1061/(ASCE)0733-9445(2002)128:6(815)
Web Address (URL)http://scitation.aip.org/getpdf/servlet/GetPDFServlet?filetype=pdf&id=JSENDH000128000006000815000001&idtype=cvips
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.

Keywordsperformance-based optimization, topology optimization, strut-and-tie models, structural concrete, finite element analysis
ANZSRC Field of Research 2020400510. Structural engineering
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Byline AffiliationsUniversity of New South Wales
Durham University, United Kingdom
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