Uncertainty in Geometry and Modelling in Safety Formats for Nonlinear Analysis of RC Structures Case Study

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21610%2F21%3A00353885" target="_blank" >RIV/68407700:21610/21:00353885 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/28399269:_____/21:N0000009

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Uncertainty in Geometry and Modelling in Safety Formats for Nonlinear Analysis of RC Structures Case Study

Popis výsledku v původním jazyce

The partial factor method is the basic method for the design of new structures and reliability assessment of existing structures. It offers a pragmatic approach, sufficient for many reinforced concrete (RC) structures in various design or assessment situations. However, the global safety format or probabilistic reliability analysis may be more appropriate in cases with strong non-linear behavior, dominating tensile and fracture-mechanical properties, or with multiple failure modes of similar importance. fib Model Code 2010 and its revision under development (MC 2020) introduce a comprehensive system for reliability verifications based on non-linear finite element analysis (NLFEA). Focusing on structural resistance, NLFEA can be based on the partial factor method (PFM), global factor method (GFM), and full probabilistic method (PM). This study focuses on a simply supported RC beam for which tests indicate two competing failure mechanisms bending and shear. The effect of different failure modes is investigated by comparing design resistances obtained by the three safety formats. Reflecting drafts of MC 2020 and prEN 1992 for design and assessment of concrete structures, it is shown how uncertainty in geometry can be incorporated in NLFEA. The case study demonstrates that uncertainty in geometry can be included in various safety formats for NLFEA of RC structures. Numerical investigations reveal that there are negligible differences amongst design bending resistances and they show a very good agreement with analytical methods.

Název v anglickém jazyce

Uncertainty in Geometry and Modelling in Safety Formats for Nonlinear Analysis of RC Structures Case Study

Popis výsledku anglicky

The partial factor method is the basic method for the design of new structures and reliability assessment of existing structures. It offers a pragmatic approach, sufficient for many reinforced concrete (RC) structures in various design or assessment situations. However, the global safety format or probabilistic reliability analysis may be more appropriate in cases with strong non-linear behavior, dominating tensile and fracture-mechanical properties, or with multiple failure modes of similar importance. fib Model Code 2010 and its revision under development (MC 2020) introduce a comprehensive system for reliability verifications based on non-linear finite element analysis (NLFEA). Focusing on structural resistance, NLFEA can be based on the partial factor method (PFM), global factor method (GFM), and full probabilistic method (PM). This study focuses on a simply supported RC beam for which tests indicate two competing failure mechanisms bending and shear. The effect of different failure modes is investigated by comparing design resistances obtained by the three safety formats. Reflecting drafts of MC 2020 and prEN 1992 for design and assessment of concrete structures, it is shown how uncertainty in geometry can be incorporated in NLFEA. The case study demonstrates that uncertainty in geometry can be included in various safety formats for NLFEA of RC structures. Numerical investigations reveal that there are negligible differences amongst design bending resistances and they show a very good agreement with analytical methods.

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/GA20-01781S" target="_blank" >GA20-01781S: Modelování nejistot při hodnocení spolehlivosti betonových konstrukcí</a><br>

Návaznosti

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

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název statě ve sborníku

Concrete Structures: New Trends for Eco-Efficiency and Performance

ISBN

978-2-940643-08-0

ISSN

2617-4820

e-ISSN

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Počet stran výsledku

10

Strana od-do

2325-2334

Název nakladatele

Fédération Internationale du Béton

Místo vydání

Lausanne

Místo konání akce

online from Lisbon

Datum konání akce

14. 6. 2021

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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