Sensitivity assessment and lateral-torsional buckling design of I-beams using solid finite elements

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26110%2F17%3APU125834" target="_blank" >RIV/00216305:26110/17:PU125834 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0143974X16305454" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0143974X16305454</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jcsr.2017.09.014" target="_blank" >10.1016/j.jcsr.2017.09.014</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Sensitivity assessment and lateral-torsional buckling design of I-beams using solid finite elements

Popis výsledku v původním jazyce

The article describes the statistical and sensitivity analysis of the load-carrying capacity (LCC) of a slender hot-rolled steel beam subjected to lateral-torsional buckling due to uniform bending. The beam is modelled using the finite element method with SOLID185 elements in ANSYS software. LCC is determined using a geometrically and materially non-linear solution with consideration given to the effects of initial random imperfections and residual stress. A Latin Hypercube Sampling algorithm is used to generate samples of initial imperfections. LCC is approximated using a polynomial, which permits the use of a high number of simulation runs. The output of the statistical analysis is the design quantile of LCC, which verifies the reliability of the design according to the Eurocode 3 standard. Two types of sensitivity analysis, (i) and (ii), are applied. The results for (i) deal with the influence of input imperfections with respect to their random variability. They are supplemented by the results obtained for analysis (ii), which provide a description of the inaccuracies in the statistical moments of these input variables (second degree of uncertainty). Sensitivity analysis (ii) showed that modifying the mean value or standard deviation of the residual stress has a relatively small effect (in comparison with other imperfections) on the design quantile. Analyses are performed using the step-by-step method for non-dimensionless slenderness values of zero to three, and the obtained results are plotted in graphs.

Název v anglickém jazyce

Sensitivity assessment and lateral-torsional buckling design of I-beams using solid finite elements

Popis výsledku anglicky

The article describes the statistical and sensitivity analysis of the load-carrying capacity (LCC) of a slender hot-rolled steel beam subjected to lateral-torsional buckling due to uniform bending. The beam is modelled using the finite element method with SOLID185 elements in ANSYS software. LCC is determined using a geometrically and materially non-linear solution with consideration given to the effects of initial random imperfections and residual stress. A Latin Hypercube Sampling algorithm is used to generate samples of initial imperfections. LCC is approximated using a polynomial, which permits the use of a high number of simulation runs. The output of the statistical analysis is the design quantile of LCC, which verifies the reliability of the design according to the Eurocode 3 standard. Two types of sensitivity analysis, (i) and (ii), are applied. The results for (i) deal with the influence of input imperfections with respect to their random variability. They are supplemented by the results obtained for analysis (ii), which provide a description of the inaccuracies in the statistical moments of these input variables (second degree of uncertainty). Sensitivity analysis (ii) showed that modifying the mean value or standard deviation of the residual stress has a relatively small effect (in comparison with other imperfections) on the design quantile. Analyses are performed using the step-by-step method for non-dimensionless slenderness values of zero to three, and the obtained results are plotted in graphs.

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/LO1408" target="_blank" >LO1408: AdMaS UP - Pokročilé stavební materiály, konstrukce a technologie</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

Journal of Constructional Steel Research

ISSN

0143-974X

e-ISSN

1873-5983

Svazek periodika

139

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

13

Strana od-do

110-122

Kód UT WoS článku

000419410500010

EID výsledku v databázi Scopus

2-s2.0-85029871023