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n Journal of the South African Institution of Civil Engineers - Conceptual design of rigidly framed structures using optimization methods : technical paper

Volume 36, Issue 2
  • ISSN : 1021-2019
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Abstract

An automated method for the minimum weight sizing design of rigidly framed structures is presented. The implementation consists of structural and sensitivity analysis modules as well as a mathematical optimization module. These modules are included in a data management and interpretive system for convenient user interface and program development. Three design studies, ranging from a four-member to a 30-member structure, were conducted to demonstrate the optimization capabilities. The structures are subjected to multiple load cases and variable linking is applied. In contrast to the results of previous analyses conducted on the same problem, the current analyses result in unsymmetric optimum configurations, with optimum weights significantly smaller in some of the examples.

'n Outomatiese metode vir snitgroottebepaling van starraamwerke vir die doeleinde van gewigsminimering word bespreek. Die rekenaarimplementering bestaan uit struktuur- en sensitiwiteitsanalisemodules asook 'n wiskundige optimeringsmodule. Hierdie modules is geintegreer in 'n datahantering- en vertalingstelsel vir gerieflike gebruikersintervlak en programontwikkeling. Drie ontwerpstudies, insluitend 'n 30-elementraam, is gedoen om die optimeringsvermoe te illustreer. Veelvuldige lasgevalle is toegepas en koppeling van ontwerpveranderlikes is ook geimplementeer. In teestelling met die resultate van vorige analises van dieselfde voorbeelde, het die resultate van die huidige analises onsimmetriese geometriee tot gevolg gehad, met kleiner minimum gewigte in sommige van die voorbeelde.

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/content/civileng1/36/2/EJC26748
1994-01-01
2017-08-23

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