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

Result code in 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>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

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

Original language description

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.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

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OECD FORD branch

20102 - Construction engineering, Municipal and structural engineering

Project

<a href="/en/project/GA23-06222S" target="_blank" >GA23-06222S: Stochastic Interaction of Climatic Actions in Structural Reliability</a><br>

Continuities

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

Publication year

2025

Confidentiality

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

Article name in the collection

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

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Number of pages

8

Pages from-to

155-162

Publisher name

fib. The International Federation for Structural Concrete

Place of publication

Lausanne

Event location

Lecco

Event date

Jun 30, 2025

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

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