Topology optimization of strut-and-tie models in reinforced concrete structures using an evolutionary procedure

Article


Liang, Qing Quan, Xie, Yi Min and Steven, Grant P.. 2000. "Topology optimization of strut-and-tie models in reinforced concrete structures using an evolutionary procedure ." ACI Structural Journal. 97 (2), pp. 322-330.
Article Title

Topology optimization of strut-and-tie models in reinforced concrete structures using an evolutionary procedure

ERA Journal ID4142
Article CategoryArticle
AuthorsLiang, Qing Quan (Author), Xie, Yi Min (Author) and Steven, Grant P. (Author)
Journal TitleACI Structural Journal
Journal Citation97 (2), pp. 322-330
Number of Pages9
Year2000
PublisherAmerican Concrete Institute
Place of PublicationUSA
ISSN0889-3241
1944-7361
Web Address (URL)http://www.concrete.org/PUBS/JOURNALS/SJHOME.ASP
Abstract

This paper presents a performance based evolutionary topology optimization method for automatically generating optimal strut-and-tie models in reinforced concrete structures with displacement constraints. In the proposed approach, the element virtual strain energy is calculated for element removal, while a performance index is used to monitor the evolutionary optimization process. By systematically removing elements that have the least contribution to the stiffness from the discretized concrete member, the load transfer mechanism in the member is gradually characterized by the remaining elements. The optimal topology of the strut-and-tie model is determined from the performance index history, based on the optimization criterion of minimizing the weight of the structure while the constrained displacements are within acceptable limits. Several examples are provided to demonstrate the capability of the proposed method in finding the actual load transfer mechanism in concrete members. It is shown that the proposed optimization procedure can produce optimal strut-and-tie models that are supported by the existing analytical solutions and experimental evidence, and can be used in practice, especially in the design of complex reinforced concrete members where no previous experience is available.

KeywordsCorbels, deep beams, performance, performance-based optimization, reinforced concretes, topology optimization
ANZSRC Field of Research 2020400510. Structural engineering
Public Notes

Copyright permission and Published version supplied by Publisher.

Byline AffiliationsUniversity of Western Sydney
Victoria University of Technology
University of Sydney
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