Publication result detail

Global Sensitivity Analysis of Lateral-torsional Buckling Resistance Based on Finite Element Simulations

KALA, Z.; VALEŠ, J.

Original Title

Global Sensitivity Analysis of Lateral-torsional Buckling Resistance Based on Finite Element Simulations

English Title

Global Sensitivity Analysis of Lateral-torsional Buckling Resistance Based on Finite Element Simulations

Type

WoS Article

Original Abstract

The article examines a hot-rolled steel I-beam subjected to lateral-torsional buckling (LTB) due to bending moment. The paper describes a non-linear finite element (FE) model and numerical approximation and simulation methods used for the global sensitivity analysis of the static resistance of a beam under major axis bending. The presented geometrically and materially non-linear FE model based on solid elements models in detail the LTB and the effects of initial imperfections on the ultimate limit state of a steel beam. Simulation runs of random imperfections are generated using the Latin Hypercube Sampling (LHS) method. Polynomial approximation of the model output helped minimise the number of runs of the nonlinear finite element model. The approximation polynomial then facilitated the evaluation of sensitivity indices using a high number of simulation runs. The relationships between the slenderness and the first and second-order sensitivity indices are plotted in graphs. The graphs show the results of global sensitivity analyses of stochastic effects of initial imperfections and residual stress on the resistance of the investigated steel beam.

English abstract

The article examines a hot-rolled steel I-beam subjected to lateral-torsional buckling (LTB) due to bending moment. The paper describes a non-linear finite element (FE) model and numerical approximation and simulation methods used for the global sensitivity analysis of the static resistance of a beam under major axis bending. The presented geometrically and materially non-linear FE model based on solid elements models in detail the LTB and the effects of initial imperfections on the ultimate limit state of a steel beam. Simulation runs of random imperfections are generated using the Latin Hypercube Sampling (LHS) method. Polynomial approximation of the model output helped minimise the number of runs of the nonlinear finite element model. The approximation polynomial then facilitated the evaluation of sensitivity indices using a high number of simulation runs. The relationships between the slenderness and the first and second-order sensitivity indices are plotted in graphs. The graphs show the results of global sensitivity analyses of stochastic effects of initial imperfections and residual stress on the resistance of the investigated steel beam.

Keywords

Sensitivity analysis, stability, reliability, lateral-torsional buckling, steel beam, imperfections, out-of-straightness, residual stress, FE modelling

Key words in English

Sensitivity analysis, stability, reliability, lateral-torsional buckling, steel beam, imperfections, out-of-straightness, residual stress, FE modelling

Authors

KALA, Z.; VALEŠ, J.

RIV year

2017

Released

01.03.2017

ISBN

0141-0296

Periodical

ENGINEERING STRUCTURES

Volume

2017

Number

134

State

United Kingdom of Great Britain and Northern Ireland

Pages from

37

Pages to

47

Pages count

11

URL

https://doi.org/10.1016/j.engstruct.2016.12.032

BibTex

@article{BUT133102,
  author="Zdeněk {Kala} and Jan {Valeš}",
  title="Global Sensitivity Analysis of Lateral-torsional Buckling Resistance Based on Finite Element Simulations",
  journal="ENGINEERING STRUCTURES",
  year="2017",
  volume="2017",
  number="134",
  pages="37--47",
  doi="10.1016/j.engstruct.2016.12.032",
  issn="0141-0296",
  url="https://doi.org/10.1016/j.engstruct.2016.12.032"
}

Documents

133102_doi10.1016lj.engstruct.2016.12.032
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