Comparison of optimal designs of steel portal frames including topological asymmetry considering rolled, fabricated and tapered sections

Ross McKinstray, James B.P. Lim, Tiku T. Tanyimboh, Duoc T. Phan, Wei Sha

Research output: Contribution to journalArticle

14 Citations (Scopus)
184 Downloads (Pure)

Abstract

A structural design optimisation has been carried out to allow for asymmetry and fully tapered portal frames. The additional weight of an asymmetric structural shape was found to be on average 5 to 13% with additional photovoltaic (PV) loading having a negligible effect on the optimum design. It was also shown that fabricated and tapered frames achieved an average percentage weight reduction of 9% and 11%, respectively, as compared to comparable hot-rolled steel frames. When the deflection limits recommended by the Steel Construction Institute were used, frames were shown to be deflection controlled with industrial limits yielding up to 40% saving.
Original languageEnglish
Pages (from-to)505-524
Number of pages20
JournalEngineering Structures
Volume111
Early online date13 Jan 2016
DOIs
Publication statusPublished - 15 Mar 2016

Keywords

  • hot-rolled steel
  • fabricated beams
  • portal frames
  • genetic algorithms
  • serviceability limits
  • buckling limits

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