Sensitivity Analysis of Geometrically Imperfect Single-storey Steel Frame Structure-A Comparison of Two Loading Modes

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26110%2F26%3A0200017" target="_blank" >RIV/00216305:26110/26:0200017 - isvavai.cz</a>

Result on the web

<a href="https://inz-min.online/index.php/im/en/article/view/735" target="_blank" >https://inz-min.online/index.php/im/en/article/view/735</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.29227/IM-2024-02-20" target="_blank" >10.29227/IM-2024-02-20</a>

Result language

angličtina

Original language name

Sensitivity Analysis of Geometrically Imperfect Single-storey Steel Frame Structure-A Comparison of Two Loading Modes

Original language description

In this study, two methods to numerically analyse a single-storey vertically loaded steel frame structure with initial geometrical imperfections are compared. The first method is deterministic, where the initial imperfections, sway of the frame and local bow imperfections of the columns are based on the corresponding European standard to design steel structures, Eurocode 3 (EC3). The second, probabilistic method, where the imperfections are defined by the random stochastic parameters is using the first order reliability method (FORM) along with numerous numerical finite element analyses in order to estimate the ultimate resistance of the structure. In this FORM method, the statistical values of these input imperfections are derived from the European standard for allowed erection and manufacturer tolerances, and these data corresponds with the experimentally measured imperfections on real structures. Material parameters, as Young’s modulus and yield stress are also considered as stochastic variables. Design ultimate resistance based on EC3 is compared with the 0.1% quantile of the stochastic ultimate resistance of the FORM method. In general, assumptions of the deterministic EC3 approach are sometimes considered as overly conservative. The main objective of this study is to verify and evaluate these assumptions by comparison with more precise probabilistic method. Moreover, for both methods (EC3 and FORM), the resistance is determined under two loading modes, one by increasing of the force load, the other by prescribed displacement. The loading conditions of these two loading modes are applied analogically to each other, hence similar resistances for the corresponding method are expected. However, this assumption needs to be verified within the probabilistic analysis conditions, what is the secondary objective of this paper.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

20100 - Civil engineering

Project

<a href="/en/project/GA23-04712S" target="_blank" >GA23-04712S: Importance of Stochastic Interactions in Computational Models of Structural Mechanics</a><br>

Continuities

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

Publication year

2024

Confidentiality

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

Name of the periodical

Inzynieria Mineralna-Journal of the Polish Mineral Engineering Society

ISSN

1640-4920

e-ISSN

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Volume of the periodical

1

Issue of the periodical within the volume

2

Country of publishing house

PL - POLAND

Number of pages

7

Pages from-to

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UT code for WoS article

001697492600033

EID of the result in the Scopus database

2-s2.0-105023280578