Generating optimal strut-and-tie models in prestressed concrete beams by performance-based optimization

Article

Liang, Qing Quan, Xie, Yi Min and Steven, Grant P.. 2001. "Generating optimal strut-and-tie models in prestressed concrete beams by performance-based optimization ." ACI Structural Journal. 98 (2), pp. 226-232.
Article Title

Generating optimal strut-and-tie models in prestressed concrete beams by performance-based optimization

ERA Journal ID4142
Article CategoryArticle
AuthorsLiang, Qing Quan (Author), Xie, Yi Min (Author) and Steven, Grant P. (Author)
Journal TitleACI Structural Journal
Journal Citation98 (2), pp. 226-232
Article Number413DF
Number of Pages7
Year2001
PublisherAmerican Concrete Institute
Place of PublicationUnited States
ISSN0889-3241
1944-7361
Web Address (URL)http://www.concrete.org/PUBS/JOURNALS/OLJDetails.asp?srchtype=ALL&date=anytime&searchmonth=1&searchday=1&searchyear=2007&publication=Structural+Journal&authors=liang&volume=98&issue=2&ID=10191
Abstract

This paper deals with automatic generation of optimal strut-and-tie models in prestressed concrete beams by the performance-based optimization (PBO) method. In the present approach, developing strut-and-tie models in prestressed concrete members is transformed to the topology optimization problem of continuum structures. By treating prestressing forces as external loads, prestressed concrete beams can be analyzed, optimized, and dimensioned with strut-and-tie models like reinforced concrete beams. Optimal strut-and-tie models in nonprestressed, partially prestressed, and fully prestressed concrete beams are investigated by using the performance-based optimization technique. It is demonstrated that the magnitude of prestressing farces significantly affects the layouts of optimal strut-and-tie models in prestressed concrete members. The performance-based optimization method is shown to be effective in developing reliable strut-and-tie models for the design of prestressed concrete beams.

Keywordsperformance-based optimization, topology optimization, strut-and-tie models, prestressed concrete
ANZSRC Field of Research 2020400510. Structural engineering
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Byline AffiliationsUniversity of Western Sydney
Victoria University of Technology
Durham University, United Kingdom
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