Cold-formed steel member cross-section shape optimization by Knowledge-Based Global Optimization method

H. Liu, B. W. Schafer, T. Igusa

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

One of the great advantages of cold-formed steel is the immense flexibility that the material affords in forming cross-sections. This flexibility would seem to readily lend itself to optimization of member cross-section shapes. However, little research has been conducted to explore this general problem; in part, because most existing optimization attempts have used prescriptive design standards that apply to a very limited set of cross-sections for their objective function evaluation. A newly introduced design procedure, the Direct Strength Method, or DSM, provides a method for evaluating the strength of cold-formed steel sections of arbitrary geometry. However, such an arbitrary problem, with a highly nonlinear objective function, is still difficult to solve by traditional optimization methods. A new technique, known as Knowledge Based Global Optimization, or KBGO, has recently been introduced which appears to hold promise for general optimization problems of this nature. In this paper, KBGO is applied to the member shape optimization of a cold-formed steel column to demonstrate the potential of this new optimization technique when combined with new advanced analysis methods (DSM) for member strength prediction. The results demonstrate that KBGO is indeed effective for such a problem, and can also shed some light on key features that are important for a successful member cross-section.

Original languageEnglish (US)
Title of host publicationProceedings of the 2004 Structures Congress - Building on the Past
Subtitle of host publicationSecuring the Future
EditorsG.E. Blandford, G.E. Blandford
Pages1413-1427
Number of pages15
StatePublished - Aug 16 2004
EventProceedings of the 2004 Structures Congress - Building on the Past: Securing the Future - Nashville, TN, United States
Duration: May 22 2004May 26 2004

Publication series

NameProceedings of the 2004 Structures Congress - Building on the Past: Securing the Future

Other

OtherProceedings of the 2004 Structures Congress - Building on the Past: Securing the Future
CountryUnited States
CityNashville, TN
Period5/22/045/26/04

ASJC Scopus subject areas

  • Engineering(all)

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