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

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26110%2F16%3APU122630" target="_blank" >RIV/00216305:26110/16:PU122630 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1016/j.engstruct.2016.12.032" target="_blank" >https://doi.org/10.1016/j.engstruct.2016.12.032</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.engstruct.2016.12.032" target="_blank" >10.1016/j.engstruct.2016.12.032</a>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20102 - Construction engineering, Municipal and structural engineering

Projekt

<a href="/cs/project/GA14-17997S" target="_blank" >GA14-17997S: Globální citlivostní analýza v nelineární stavební mechanice</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

ENGINEERING STRUCTURES

ISSN

0141-0296

e-ISSN

1873-7323

Svazek periodika

2017

Číslo periodika v rámci svazku

134

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

11

Strana od-do

37-47

Kód UT WoS článku

000394062400004

EID výsledku v databázi Scopus

2-s2.0-85007049698