Optimal strut-and-tie models in structural concrete members

Paper


Liang, Q. Q., Xie, Y. M. and Steven, G. P.. 1999. "Optimal strut-and-tie models in structural concrete members." Topping, B. H. V. and Kumar, B. (ed.) 7th International Conference on Civil and Structural Engineering: Optimization and Control in Civil and Structural Engineering. Oxford, United Kingdom 13 - 15 Sep 1999 Edinburgh, Scotland.
Paper/Presentation Title

Optimal strut-and-tie models in structural concrete members

Presentation TypePaper
AuthorsLiang, Q. Q. (Author), Xie, Y. M. (Author) and Steven, G. P. (Author)
EditorsTopping, B. H. V. and Kumar, B.
Journal or Proceedings TitleProceedings of the 7th International Conference on Civil and Structural Engineering
Journal Citation1, pp. 1-8
Number of Pages8
Year1999
Place of PublicationEdinburgh, Scotland
ISBN0948749628
Conference/Event7th International Conference on Civil and Structural Engineering: Optimization and Control in Civil and Structural Engineering
Event Details
7th International Conference on Civil and Structural Engineering: Optimization and Control in Civil and Structural Engineering
Event Date
13 to end of 15 Sep 1999
Event Location
Oxford, United Kingdom
Abstract

The strut-and-tie modeling is a simple, unified, rational and safe approach for the design of structural concrete members. Conventional methods are not efficient in finding optimal strut-and-tie models in concrete members with complex geometry and loading conditions. In this paper, the Evolutionary Structural Optimization (ESO) method for continuum structures with displacement constraints is briefly outlined and used to develop optimal strut-and-tie models in structural concrete members. By treating prestressing forces as external loads, prestressed concrete members can be analyzed, optimized and dimensioned like reinforced concrete ones. By slowly removing a small number of elements with the least contribution to the stiffness from the discritized concrete member, the load-transferring mechanism in the member can be gradually chacreterized by the resulting topology. Numerical examples are presented to show the effectiveness of the proposed evolutionary material removal procedure in automatically generating optimal strut-and-tie models in reinforced and prestressed concrete members. Optimal strut-and-tie models obtained by using the ESO method are verified by the existing experimental evidence and analytical solutions.

Keywordsdeep beams; performance-based optimization; performance index; structural concrete; strut-and-tie models; topology optimization
ANZSRC Field of Research 2020400510. Structural engineering
490412. Topology
401706. Numerical modelling and mechanical characterisation
Byline AffiliationsVictoria University of Technology
University of Sydney
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