Research, theory and practice of second order direct analysis for design of steel and composite structures

S. L. Chan, Y. P. Liu, S. W. Liu

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

Abstract

The terms "Second-order Analysis" and "Direct Analysis" appear in many modern design codes but this use is still relatively new to engineers. In the past, second order analysis was mainly to account for sway effects and defined only as the second-order "indirect" analy-sis, P-Δ-only analysis or simplified second order analysis which needs to be used with the ef-fective length assumption. The modern second-order direct analysis or P-Δ-δ analysis allow-ing for both sway and member buckling effects with imperfections provides a reliable and proficient tool for practical design. Their underlying principle also carries a very different phi-losophy to the conventional design approach. This paper outlines the differences between the two design concepts. Several built structures designed completely without effective length assumption are also discussed. The era for re-Thinking our design and analysis philosophy seems to have arrived.

Original languageEnglish
Title of host publicationProceedings of the International Colloquium on Stability and Ductility of Steel Structures, SDSS 2016
EditorsViorel Ungureanu, Dan Dubina
PublisherEuropean Convention for Constructional Steelwork
Pages3-13
Number of pages11
ISBN (Electronic)9789291471331
Publication statusPublished - 1 Jan 2016
EventInternational Colloquium on Stability and Ductility of Steel Structures, SDSS 2016 - Timisoara, Romania
Duration: 30 May 20161 Jun 2016

Publication series

NameProceedings of the International Colloquium on Stability and Ductility of Steel Structures, SDSS 2016

Conference

ConferenceInternational Colloquium on Stability and Ductility of Steel Structures, SDSS 2016
Country/TerritoryRomania
CityTimisoara
Period30/05/161/06/16

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Safety, Risk, Reliability and Quality

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