Prestress Loss and Uncertainty in Concrete Box Girder Creep

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F15%3A00233226" target="_blank" >RIV/68407700:21110/15:00233226 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1061/9780784479346.083" target="_blank" >http://dx.doi.org/10.1061/9780784479346.083</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1061/9780784479346.083" target="_blank" >10.1061/9780784479346.083</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Prestress Loss and Uncertainty in Concrete Box Girder Creep

Popis výsledku v původním jazyce

The paper is directed to the cross section warping effect and to the warping induced long term prestress loss due to creep of concrete, which is analyzed deterministically and stochastically. The statistical variability of material creep parameters and environmental factors has a significant effect on the statistical scatter of the calculated prestress loss. In order to obtain the real development of concrete creep it is important to use a model with strong theoretical basis. Sophisticated model B4 provides very accurate concrete creep and shrinkage prediction. The statistical randomness of boundary and environmental conditions is solved by application of Monte Carlo – Latin hypercube sampling method. It is shown that the severity of cross section warping can be of fundamental importance, particularly in the case of unevenly distributed and isolated tendons in cross-section and in the case of short spans. Both the 3D effects and the statistical variability of creep must be taken into account if a reliable design of box girder bridges from the viewpoint of long-term serviceability should be achieved.

Název v anglickém jazyce

Prestress Loss and Uncertainty in Concrete Box Girder Creep

Popis výsledku anglicky

The paper is directed to the cross section warping effect and to the warping induced long term prestress loss due to creep of concrete, which is analyzed deterministically and stochastically. The statistical variability of material creep parameters and environmental factors has a significant effect on the statistical scatter of the calculated prestress loss. In order to obtain the real development of concrete creep it is important to use a model with strong theoretical basis. Sophisticated model B4 provides very accurate concrete creep and shrinkage prediction. The statistical randomness of boundary and environmental conditions is solved by application of Monte Carlo – Latin hypercube sampling method. It is shown that the severity of cross section warping can be of fundamental importance, particularly in the case of unevenly distributed and isolated tendons in cross-section and in the case of short spans. Both the 3D effects and the statistical variability of creep must be taken into account if a reliable design of box girder bridges from the viewpoint of long-term serviceability should be achieved.

Druh

D - Stať ve sborníku

CEP obor

JM - Inženýrské stavitelství

OECD FORD obor

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Projekt

<a href="/cs/project/TE01020168" target="_blank" >TE01020168: Centrum pro efektivní a udržitelnou dopravní infrastrukturu (CESTI)</a><br>

Návaznosti

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

Rok uplatnění

2015

Kód důvěrnosti údajů

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

Název statě ve sborníku

CONCREEP-10 Mechanics and Physics of Creep, Shrinkage, and Durability of Concrete and Concrete Structures

ISBN

978-0-7844-7934-6

ISSN

—

e-ISSN

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Počet stran výsledku

10

Strana od-do

697-706

Název nakladatele

Vienna University Of Technology, Institute For Mechanics of Materials and Structures

Místo vydání

Vienna

Místo konání akce

Vídeň

Datum konání akce

21. 9. 2015

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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