Effect of initial imperfections of steel liner plate on the behavior of the liner and anchorage elements in prestressed concrete containments

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F17%3A00307185" target="_blank" >RIV/68407700:21110/17:00307185 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Effect of initial imperfections of steel liner plate on the behavior of the liner and anchorage elements in prestressed concrete containments

Popis výsledku v původním jazyce

Prestressed concrete containments are often equipped with an internal steel liner that is responsible for the leaktightness of a containment in case of a serious accident. Production and construction of the liner is very demanding due to the slenderness of the liner. Therefore, the steel liner always shows some geometrical imperfections. The paper presents a numerical study focused on the importance of initial imperfections of steel liner plate on the behaviour of the liner and anchorage elements. FEM models of a segment of containment wall were created and loaded by prestress, operation temperature, creep and shrinkage, loss of coolant accident (LOCA) temperature and LOCA pressure. The stress-strain behaviour of the steel liner plate in the course of service life of the structure was observed. Two different types of anchorage were studied – headed studs and L-profiles. According to the results, there is no risk of buckling of the liner or failure of the liner and anchorage elements during operation conditions and LOCA. There is also no substantial difference between the behaviour of the liners connected by headed studs or by L-profiles. However, the initial imperfections of the liner plate were found to be very important for the distribution of stress in the liner and for the crack pattern in concrete.

Název v anglickém jazyce

Effect of initial imperfections of steel liner plate on the behavior of the liner and anchorage elements in prestressed concrete containments

Popis výsledku anglicky

Prestressed concrete containments are often equipped with an internal steel liner that is responsible for the leaktightness of a containment in case of a serious accident. Production and construction of the liner is very demanding due to the slenderness of the liner. Therefore, the steel liner always shows some geometrical imperfections. The paper presents a numerical study focused on the importance of initial imperfections of steel liner plate on the behaviour of the liner and anchorage elements. FEM models of a segment of containment wall were created and loaded by prestress, operation temperature, creep and shrinkage, loss of coolant accident (LOCA) temperature and LOCA pressure. The stress-strain behaviour of the steel liner plate in the course of service life of the structure was observed. Two different types of anchorage were studied – headed studs and L-profiles. According to the results, there is no risk of buckling of the liner or failure of the liner and anchorage elements during operation conditions and LOCA. There is also no substantial difference between the behaviour of the liners connected by headed studs or by L-profiles. However, the initial imperfections of the liner plate were found to be very important for the distribution of stress in the liner and for the crack pattern in concrete.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20101 - Civil engineering

Projekt

<a href="/cs/project/GA17-19463S" target="_blank" >GA17-19463S: Analýza závislostí mezi mikrostrukturou a makroskopickými vlastnostmi ultravysokohodnotných betonů</a><br>

Návaznosti

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

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název statě ve sborníku

Nuclear Power Plants; Structures, Risk & Decommissioning

ISBN

978-0-9930121-9-8

ISSN

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e-ISSN

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Počet stran výsledku

8

Strana od-do

84-91

Název nakladatele

ASRANet Ltd.

Místo vydání

Glasgow

Místo konání akce

London

Datum konání akce

6. 2. 2017

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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