Numerical modelling of square tubular steel beams subjected to transverse blast loads

H. H. Jama, M. R. Bambach, G. N. Nurick, R. H. Grzebieta, X. L. Zhao

Research output: Journal article publicationJournal articleAcademic researchpeer-review

83 Citations (Scopus)

Abstract

This paper presents the numerical simulations of thin-walled square hollow steel beams subjected to a uniform transverse blast load. The objectives of the numerical simulations were to gain an insight into the temporal distribution of the global and local deformation and the adiabatic temperature rise in the beams as a result of impulsive loading. Additionally, the finite element predictions using Ls-Dyna are compared to the experimentally observed global and local deformations. The full lengths of the beams were modelled using three material models based on the linear piecewise plasticity material model which incorporated strain hardening, with and without strain-rate hardening and with strain-rate hardening and temperature softening. The blast wave was simulated as a rectangular pressure pulse distributed over the top surface of the beams. Ls-Dyna and the material model used were found to predict the global and local deformation of the beams reasonably well. Incorporating strain-rate hardening was found to be important to be able to predict the global and local deformation of the beams. Thermal softening was found to play a small but not negligible role.

Original languageEnglish
Pages (from-to)1523-1534
Number of pages12
JournalThin-Walled Structures
Volume47
Issue number12
DOIs
Publication statusPublished - Dec 2009
Externally publishedYes

Keywords

  • Blast loading
  • Impulsive loading
  • Ls-Dyna
  • Mode I deformation
  • Numerical simulation
  • Tubular beams

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Mechanical Engineering

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