Optimal strut-and-tie models in structural concrete members

Liang, Q. Q. and Xie, Y. M. and Steven, G. P. (1999) Optimal strut-and-tie models in structural concrete members. In: 7th International Conference on Civil and Structural Engineering: Optimization and Control in Civil and Structural Engineering, 13-15 Sep 1999, 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.


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Item Type: Conference or Workshop Item (Commonwealth Reporting Category E) (Paper)
Refereed: Yes
Item Status: Live Archive
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - Department of Agricultural, Civil and Environmental Engineering
Date Deposited: 05 Aug 2013 03:21
Last Modified: 05 Aug 2013 03:21
Uncontrolled Keywords: deep beams; performance-based optimization; performance index; structural concrete; strut-and-tie models; topology optimization
Fields of Research : 09 Engineering > 0905 Civil Engineering > 090506 Structural Engineering
01 Mathematical Sciences > 0101 Pure Mathematics > 010112 Topology
09 Engineering > 0913 Mechanical Engineering > 091307 Numerical Modelling and Mechanical Characterisation
Socio-Economic Objective: B Economic Development > 87 Construction > 8703 Construction Materials Performance and Processes > 870301 Cement and Concrete Materials
URI: http://eprints.usq.edu.au/id/eprint/3404

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