Evaluation of the Condition of Prefabricated Pretensioned Prestressed Beam Forming the Load-Bearing Structure of Bridges after About 60 Years of Use

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21610%2F24%3A00381997" target="_blank" >RIV/68407700:21610/24:00381997 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1007/978-981-99-4049-3_60" target="_blank" >http://dx.doi.org/10.1007/978-981-99-4049-3_60</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/978-981-99-4049-3_60" target="_blank" >10.1007/978-981-99-4049-3_60</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Evaluation of the Condition of Prefabricated Pretensioned Prestressed Beam Forming the Load-Bearing Structure of Bridges after About 60 Years of Use

Popis výsledku v původním jazyce

The paper summarizes results of diagnostic work on approximately 6 bridges constructed from prestressed standardized precast elements used in the 1960-1990s for the construction of bridges in the Czech Republic. These are mainly the standardized girders of KA type (Type documents for prefabricated girders KA-73, Dopravoprojekt 11/1973, digital copy) for clearances of 9–18 m and I girders (Type documents for prefabricated girders I-73, Dopravoprojekt 11/1973, digital copy) for clearances of 21–30 m. The assessment focused mainly on the actual strength class of concrete in relation to the design strength, visual inspection of the outer face and inner chambers of the girders with the help of videoscopes, and last but not least, checking the condition of the prestressing reinforcement and the state of cable ducts grouting. The condition of the prestressing reinforcement was checked firstly by means of mechanical probes and secondly by means of the half-cell method in the place of visual defects. Results were supplemented by a corrosion survey of the prestressing reinforcement with regard to content of chloride ions in the grout mixture.

Název v anglickém jazyce

Evaluation of the Condition of Prefabricated Pretensioned Prestressed Beam Forming the Load-Bearing Structure of Bridges after About 60 Years of Use

Popis výsledku anglicky

The paper summarizes results of diagnostic work on approximately 6 bridges constructed from prestressed standardized precast elements used in the 1960-1990s for the construction of bridges in the Czech Republic. These are mainly the standardized girders of KA type (Type documents for prefabricated girders KA-73, Dopravoprojekt 11/1973, digital copy) for clearances of 9–18 m and I girders (Type documents for prefabricated girders I-73, Dopravoprojekt 11/1973, digital copy) for clearances of 21–30 m. The assessment focused mainly on the actual strength class of concrete in relation to the design strength, visual inspection of the outer face and inner chambers of the girders with the help of videoscopes, and last but not least, checking the condition of the prestressing reinforcement and the state of cable ducts grouting. The condition of the prestressing reinforcement was checked firstly by means of mechanical probes and secondly by means of the half-cell method in the place of visual defects. Results were supplemented by a corrosion survey of the prestressing reinforcement with regard to content of chloride ions in the grout mixture.

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/CK02000329" target="_blank" >CK02000329: UHPC jako hlavní nosný systém mostů středních rozpětí</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 5th International Conference on Civil Engineering and Architecture

ISBN

978-981-99-4048-6

ISSN

2366-2557

e-ISSN

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Počet stran výsledku

10

Strana od-do

785-794

Název nakladatele

Springer Nature

Místo vydání

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Místo konání akce

Hanoi

Datum konání akce

16. 12. 2024

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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