Pilot comparison of safety formats for reliability assessment of RC structures

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26110%2F19%3APU132269" target="_blank" >RIV/00216305:26110/19:PU132269 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/28399269:_____/19:N0000007 RIV/68407700:21610/19:00331722

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Pilot comparison of safety formats for reliability assessment of RC structures

Popis výsledku v původním jazyce

ib Model Code 2010 and its ongoing revision consider a comprehensive system for treating reliability and uncertainty in reliability assessment and design of reinforced concrete (RC) structures using a nonlinear analysis. This study analyses a simply supported RC beam for which shear resistance has been experimentally verified, and steel yielding or concrete failure can be observed by varying shear reinforcement ratio. The effect of different failure modes is investigated by comparing design resistance obtained by selected safety formats: probabilistic assessment using LHS, estimate of coefficient of variation ECoV, global resistance format, and the partial factor method. The MC2010 Level of Approximation 3 (LoA3) is applied to represent models that combine the reinforcement and concrete contributions. A reference solution is provided by the probabilistic approach that inherently takes into account the correlation between the failure modes. It appears that the partial factors for materials, commonly adopted in design, are low and fail to adequately reflect the increased model uncertainty related to LoA3. The ECoV estimates are very close to the reference design values and in this case the flexibility of the method is demonstrated. The care needs to be taken when interpreting design values based on a few simulations – the effect of statistical uncertainty may be substantial.

Název v anglickém jazyce

Pilot comparison of safety formats for reliability assessment of RC structures

Popis výsledku anglicky

ib Model Code 2010 and its ongoing revision consider a comprehensive system for treating reliability and uncertainty in reliability assessment and design of reinforced concrete (RC) structures using a nonlinear analysis. This study analyses a simply supported RC beam for which shear resistance has been experimentally verified, and steel yielding or concrete failure can be observed by varying shear reinforcement ratio. The effect of different failure modes is investigated by comparing design resistance obtained by selected safety formats: probabilistic assessment using LHS, estimate of coefficient of variation ECoV, global resistance format, and the partial factor method. The MC2010 Level of Approximation 3 (LoA3) is applied to represent models that combine the reinforcement and concrete contributions. A reference solution is provided by the probabilistic approach that inherently takes into account the correlation between the failure modes. It appears that the partial factors for materials, commonly adopted in design, are low and fail to adequately reflect the increased model uncertainty related to LoA3. The ECoV estimates are very close to the reference design values and in this case the flexibility of the method is demonstrated. The care needs to be taken when interpreting design values based on a few simulations – the effect of statistical uncertainty may be substantial.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20102 - Construction engineering, Municipal and structural engineering

Projekt

<a href="/cs/project/GA17-02862S" target="_blank" >GA17-02862S: Pravděpodobnostní modelování a optimalizace smykové únosnosti betonových nosníků (PROMOSS)</a><br>

Návaznosti

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

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název statě ve sborníku

Proceedings of the fib Symposium 2019: Concrete - Innovations in Materials, Design and Structures

ISBN

9782940643004

ISSN

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e-ISSN

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Počet stran výsledku

7

Strana od-do

2076-2083

Název nakladatele

International Federation for Structural Concrete

Místo vydání

Neuveden

Místo konání akce

Krakow

Datum konání akce

27. 5. 2019

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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