Shell buckling design and assessment and the LBA-MNA methodology

Michael Rotter

Research output: Contribution to journalArticlepeer-review

Abstract

The European Standard for Shell Strength and Stability has many provisions for the global analysis of shell structures using finite element analysis. Three alternative treatments are permitted: a simple linear analysis (LA) giving stress resultants to be compared with simple algebraic hand calculation strength assessment rules, a fully fledged nonlinear analysis, with material and geometric nonlinearities as well as properly characterised imperfections (GMNIA), and an intermediate treatment that requires only two strength assessments: linear bifurcation (LBA) and plastic limit (MNA). Because of the sensitivity of shell buckling to different forms and different amplitudes of imperfection, which depend strongly on the stress state, the GMNIA procedure is very onerous. This paper gives a brief outline of the design process and the relationship between algebraic and computational strength assessments. It then discusses the challenges facing the user of the LBA-MNA procedure and resolves some of the uncertainties surrounding it.

Original languageEnglish
Pages (from-to)791-803
Number of pages13
JournalStahlbau
Volume80
Issue number11
DOIs
Publication statusPublished - Nov 2011

Keywords

  • Berechnungs- und Bemessungsverfahren – Analysis and calculation
  • Bauwerkhülle – Building envelope
  • EDV im Stahlbau – IT in steel construction
  • Behälter- und Schornsteinbau – Vessels and chimneys
  • Plattenbeulen
  • Schalenbeulen
  • Beulinteraktion
  • Flächentragwerk
  • linear elastische Berechnung
  • LA
  • linear elastische Verzweigungsrechnung
  • LBA
  • materiell nichtlineare Berechnung
  • MNA
  • Imperfektion
  • Finite Elemente Analyse
  • Schalenberechnung plate buckling
  • shell buckling
  • buckling interaction
  • shell structure
  • simple linear analysis
  • linear bifurcation
  • imperfection
  • finite element analysis
  • shell theory

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