Detail publikace

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

KALA, Z. VALEŠ, J.

Originální název

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

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

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.

Klíčová slova

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

Autoři

KALA, Z.; VALEŠ, J.

Vydáno

1. 3. 2017

ISSN

0141-0296

Periodikum

ENGINEERING STRUCTURES

Ročník

2017

Číslo

134

Stát

Spojené království Velké Británie a Severního Irska

Strany od

37

Strany do

47

Strany počet

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"
}