Reliability Analysis of Existing Post-Tensioned Concrete Bridge Affected by Corrosion

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21610%2F24%3A00378169" target="_blank" >RIV/68407700:21610/24:00378169 - isvavai.cz</a>

Výsledek na webu

<a href="https://fib-international.org/publications/fib-proceedings/15th-phd-symposium-in-budapest-hungary-2024-proceedings-em-pdf-em-detail.html" target="_blank" >https://fib-international.org/publications/fib-proceedings/15th-phd-symposium-in-budapest-hungary-2024-proceedings-em-pdf-em-detail.html</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Reliability Analysis of Existing Post-Tensioned Concrete Bridge Affected by Corrosion

Popis výsledku v původním jazyce

During the second half of the last century, a significant number of post-tensioned concrete bridges were constructed. However, many of these structures have not received adequate maintenance over their typical lifespan of approximately 50 years. As a result, these bridges are now exhibiting signs of deteri-oration, primarily due to leakages and subsequent corrosion, partly affected also by an insufficient concrete cover. This is why nowadays it is essential to assess the load-bearing capacity of these bridges, taking into account the effects of corrosion. This study presents a case study of the estimation of the load-bearing capacity of an existing post-tensioned concrete bridge constructed in 1964. In engineering practice, this assessment is typically conducted using the partial factor method, in accordance with current standards such as the Eurocodes and the Czech standards ČSN, which often impose stricter requirements than the original standards applied in the design phase. As the use of the partial factor method can sometimes result in conservative estimates of load-bearing capacity, a fully probabilistic analysis is conducted in this study. It allows for an adequate consideration of uncertainties related to survey outcomes and level of information about resistance, load effects, and corrosion effects. It is demonstrated that the probabilistic approach is less conservative and has the potential to provide higher estimates of the load-bearing capacity for existing post-tensioned bridges.

Název v anglickém jazyce

Reliability Analysis of Existing Post-Tensioned Concrete Bridge Affected by Corrosion

Popis výsledku anglicky

During the second half of the last century, a significant number of post-tensioned concrete bridges were constructed. However, many of these structures have not received adequate maintenance over their typical lifespan of approximately 50 years. As a result, these bridges are now exhibiting signs of deteri-oration, primarily due to leakages and subsequent corrosion, partly affected also by an insufficient concrete cover. This is why nowadays it is essential to assess the load-bearing capacity of these bridges, taking into account the effects of corrosion. This study presents a case study of the estimation of the load-bearing capacity of an existing post-tensioned concrete bridge constructed in 1964. In engineering practice, this assessment is typically conducted using the partial factor method, in accordance with current standards such as the Eurocodes and the Czech standards ČSN, which often impose stricter requirements than the original standards applied in the design phase. As the use of the partial factor method can sometimes result in conservative estimates of load-bearing capacity, a fully probabilistic analysis is conducted in this study. It allows for an adequate consideration of uncertainties related to survey outcomes and level of information about resistance, load effects, and corrosion effects. It is demonstrated that the probabilistic approach is less conservative and has the potential to provide higher estimates of the load-bearing capacity for existing post-tensioned bridges.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20101 - Civil engineering

Projekt

<a href="/cs/project/GA24-10892S" target="_blank" >GA24-10892S: Strojové učení pro víceúrovňové modelování prostorové variability a trhlin pro zajištění udržitelnosti betonových konstrukcí</a><br>

Návaznosti

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

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název statě ve sborníku

Proceedings of the 15th fib International PhD Symposium in Civil Engineering

ISBN

978-2-940643-24-0

ISSN

2617-4820

e-ISSN

2617-4820

Počet stran výsledku

8

Strana od-do

667-674

Název nakladatele

fib - fédération internationale du béton

Místo vydání

Lausanne

Místo konání akce

Budapešť

Datum konání akce

28. 8. 2024

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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