Ultimate Load Capacity of Multi-Story Steel Frame Structures with Geometrical Imperfections: A Comparative Study of Two Methods

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26110%2F23%3APU150208" target="_blank" >RIV/00216305:26110/23:PU150208 - isvavai.cz</a>

Výsledek na webu

<a href="https://link.springer.com/chapter/10.1007/978-3-031-44603-0_15" target="_blank" >https://link.springer.com/chapter/10.1007/978-3-031-44603-0_15</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/978-3-031-44603-0_15" target="_blank" >10.1007/978-3-031-44603-0_15</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Ultimate Load Capacity of Multi-Story Steel Frame Structures with Geometrical Imperfections: A Comparative Study of Two Methods

Popis výsledku v původním jazyce

This study presents two methods for analyzing the ultimate load capacity of a multi-story steel frame structure with geometric imperfections and material nonlinearities. The first method is in accordance with European standard (EC) for steel structures, based on which the initial geometrical imperfections (out-of-straightness and out-of-plumb) are determined. In the second method, the first order reliability method (FORM) is utilized in order to determine the ultimate design resistance. In this second approach, the initial geometrical imperfections are based on European standard for allowed manufacturer tolerances, and are considered as statistical parameters. Local bow-imperfection amplitudes of each column (in both directions), global sways of each floor (in two directions), as well as material elastic modulus and yield stress are considered as stochastic variables (together 80 random input parameters). Cumulative tolerances of each story position are monitored and random realizations which violate these tolerances are distinguished. The results of both methods are summarized and compared in the matter of the ultimate resistances: design value according to EC vs. 0.1% quantile of stochastic ultimate resistance out of the FORM method. Failure modes of the random realizations are discussed as well. Overall, both methods resulted in comparable values of the ultimate resistances, with the design value based on EC standard being slightly more conservative then the value based on the FORM method.

Název v anglickém jazyce

Ultimate Load Capacity of Multi-Story Steel Frame Structures with Geometrical Imperfections: A Comparative Study of Two Methods

Popis výsledku anglicky

This study presents two methods for analyzing the ultimate load capacity of a multi-story steel frame structure with geometric imperfections and material nonlinearities. The first method is in accordance with European standard (EC) for steel structures, based on which the initial geometrical imperfections (out-of-straightness and out-of-plumb) are determined. In the second method, the first order reliability method (FORM) is utilized in order to determine the ultimate design resistance. In this second approach, the initial geometrical imperfections are based on European standard for allowed manufacturer tolerances, and are considered as statistical parameters. Local bow-imperfection amplitudes of each column (in both directions), global sways of each floor (in two directions), as well as material elastic modulus and yield stress are considered as stochastic variables (together 80 random input parameters). Cumulative tolerances of each story position are monitored and random realizations which violate these tolerances are distinguished. The results of both methods are summarized and compared in the matter of the ultimate resistances: design value according to EC vs. 0.1% quantile of stochastic ultimate resistance out of the FORM method. Failure modes of the random realizations are discussed as well. Overall, both methods resulted in comparable values of the ultimate resistances, with the design value based on EC standard being slightly more conservative then the value based on the FORM method.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20101 - Civil engineering

Projekt

<a href="/cs/project/GA23-04712S" target="_blank" >GA23-04712S: Význam stochastických interakcí ve výpočtových modelech stavební mechaniky</a><br>

Návaznosti

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

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název statě ve sborníku

Lecture Notes in Civil Engineering

ISBN

978-3-031-44603-0

ISSN

—

e-ISSN

—

Počet stran výsledku

10

Strana od-do

154-163

Název nakladatele

Springer Cham

Místo vydání

neuveden

Místo konání akce

Vilnius

Datum konání akce

5. 10. 2023

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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