Assessment of Actual Conditions of Posttensioned Cables for Reliability Analysis of Existing Bridges

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21610%2F25%3A00385686" target="_blank" >RIV/68407700:21610/25:00385686 - isvavai.cz</a>

Výsledek na webu

—

DOI - Digital Object Identifier

—

Jazyk výsledku

angličtina

Název v původním jazyce

Assessment of Actual Conditions of Posttensioned Cables for Reliability Analysis of Existing Bridges

Popis výsledku v původním jazyce

This contribution discusses how to take into account the actual conditions of posttensioned grouted cables based on visual and corrosion surveys in reliability assessments of existing concrete bridges. To verify the conditions of prestressing reinforcement, the destructive probes to the prestressing cables are commonly used. Based on a limited number of probes carried out in selected (a few) locations, it is necessary to rely on the engineering judgement to model actual conditions of the bridge in the global analysis. It is widely recognised that corrosion of prestressing reinforcement can significantly affect structural reliability. The corrosion development is mainly influenced by the quality of grouting, leakages and chloride contamination. As the evaluation of corrosion conditions based on limited surveys is subjective and largely depends on the experience of those responsible for survey and analysis of its results, there is an urgent need to harmonise the approach to these assessments. Therefore, this study presents a preliminary classification of the conditions of tendons affected by corrosion and discusses how this information could be used in reliability analysis of existing bridges, taking into account other factors such as structural system and required remaining service life. Common scenarios of corrosion development and its effect on structural reliability are described. Case studies illustrate applications of the methodology.

Název v anglickém jazyce

Assessment of Actual Conditions of Posttensioned Cables for Reliability Analysis of Existing Bridges

Popis výsledku anglicky

This contribution discusses how to take into account the actual conditions of posttensioned grouted cables based on visual and corrosion surveys in reliability assessments of existing concrete bridges. To verify the conditions of prestressing reinforcement, the destructive probes to the prestressing cables are commonly used. Based on a limited number of probes carried out in selected (a few) locations, it is necessary to rely on the engineering judgement to model actual conditions of the bridge in the global analysis. It is widely recognised that corrosion of prestressing reinforcement can significantly affect structural reliability. The corrosion development is mainly influenced by the quality of grouting, leakages and chloride contamination. As the evaluation of corrosion conditions based on limited surveys is subjective and largely depends on the experience of those responsible for survey and analysis of its results, there is an urgent need to harmonise the approach to these assessments. Therefore, this study presents a preliminary classification of the conditions of tendons affected by corrosion and discusses how this information could be used in reliability analysis of existing bridges, taking into account other factors such as structural system and required remaining service life. Common scenarios of corrosion development and its effect on structural reliability are described. Case studies illustrate applications of the methodology.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20102 - Construction engineering, Municipal and structural engineering

Projekt

<a href="/cs/project/GA23-06222S" target="_blank" >GA23-06222S: Vliv stochastické interakce účinků klimatických zatížení na spolehlivost konstrukcí</a><br>

Návaznosti

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

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název statě ve sborníku

fib Conference on Capacity Assessment of Corroded Reinforced Concrete Structures: from Research to Daily Engineering Evaluation, CACRCS 2025

ISBN

978-2-940643-30-1

ISSN

2617-4820

e-ISSN

—

Počet stran výsledku

8

Strana od-do

155-162

Název nakladatele

fib. The International Federation for Structural Concrete

Místo vydání

Lausanne

Místo konání akce

Lecco

Datum konání akce

30. 6. 2025

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

—