Reliability Levels Related to Different Reference Periods and Consequence Classes
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21610%2F18%3A00323873" target="_blank" >RIV/68407700:21610/18:00323873 - isvavai.cz</a>
Výsledek na webu
<a href="http://dx.doi.org/10.1002/best.201800039" target="_blank" >http://dx.doi.org/10.1002/best.201800039</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1002/best.201800039" target="_blank" >10.1002/best.201800039</a>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
Reliability Levels Related to Different Reference Periods and Consequence Classes
Popis výsledku v původním jazyce
The target reliability levels recommended in various national and international documents for new and existing structures are quite different and vaguely related to types of structures and consequences of failure. The optimum reliability levels can be obtained by considering the total expected cost of the structure over the design working life. Indicative values of reliability indexes are given in EN 1990 (2002) for two reference periods, 1 year and 50 years. The annual target reliability levels beta(t1) are presently indicated in the recent draft of EN 1990 (2017) without any explicit link to different reference period or design working life. When determining the target reliability index for the reference period of n years that generally differs from the design working life, correlation of failure events in subsequent years should be taken into account. Considering the annual reliability index beta(1) an approximate formula is proposed for the reliability index beta(nk) related to the reference period of n years and independence interval of k years. The independence interval k <= n corresponds to the mean time period in years for which the failures in subsequent periods of k years are assumed to be mutually independent. The operational use of the proposed formula is clarified by practical tools. The reliability differentiation reflected in consequence classes is also discussed in this contribution.
Název v anglickém jazyce
Reliability Levels Related to Different Reference Periods and Consequence Classes
Popis výsledku anglicky
The target reliability levels recommended in various national and international documents for new and existing structures are quite different and vaguely related to types of structures and consequences of failure. The optimum reliability levels can be obtained by considering the total expected cost of the structure over the design working life. Indicative values of reliability indexes are given in EN 1990 (2002) for two reference periods, 1 year and 50 years. The annual target reliability levels beta(t1) are presently indicated in the recent draft of EN 1990 (2017) without any explicit link to different reference period or design working life. When determining the target reliability index for the reference period of n years that generally differs from the design working life, correlation of failure events in subsequent years should be taken into account. Considering the annual reliability index beta(1) an approximate formula is proposed for the reliability index beta(nk) related to the reference period of n years and independence interval of k years. The independence interval k <= n corresponds to the mean time period in years for which the failures in subsequent periods of k years are assumed to be mutually independent. The operational use of the proposed formula is clarified by practical tools. The reliability differentiation reflected in consequence classes is also discussed in this contribution.
Klasifikace
Druh
J<sub>imp</sub> - Článek v periodiku v databázi Web of Science
CEP obor
—
OECD FORD obor
20101 - Civil engineering
Návaznosti výsledku
Projekt
Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.
Návaznosti
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Ostatní
Rok uplatnění
2018
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název periodika
Beton- und Stahlbetonbau
ISSN
0005-9900
e-ISSN
1437-1006
Svazek periodika
113
Číslo periodika v rámci svazku
September
Stát vydavatele periodika
DE - Spolková republika Německo
Počet stran výsledku
5
Strana od-do
22-26
Kód UT WoS článku
000444410900005
EID výsledku v databázi Scopus
2-s2.0-85053228438