Numerical simulation of long-term behaviour of long span prestressed concrete bridges

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F15%3A00232853" target="_blank" >RIV/68407700:21110/15:00232853 - 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

Numerical simulation of long-term behaviour of long span prestressed concrete bridges

Popis výsledku v původním jazyce

The design of structures is more and more directed towards the entire lifetime design with multiple concurrent objectives. Apart from durability, the most important factor in the whole life design of reinforced and, in particular, prestressed concrete bridges, is the Service Limit State. From this point of view, prestressed concrete bridges are very sensitive to long-term increase of deflections. This phenomenon has paramount importance for serviceability, durability and long-time reliability of such bridges. Reliable prediction of bridge deflections during their construction as well as during their service life is of crucial importance for achieving good durability and long-term serviceability. Obviously, difficulty of predicting deflections is closely related to the properties of concrete (strength, elastic modulus, nonlinearity, creep, shrinkage, etc.), both initially and with time. The long-term deflection behaviour of long-span prestressed concrete box girder bridges has often deceived engineers monitoring the deflections. A survey of many bridges monitored in various countries showed that all of them have experienced similar deflection histories. It has frequently been experienced that the box girders of many prestressed concrete bridges deflected far more than predicted in design. The deflection evolution has often been counterintuitive, with slowly growing deflections in the early years, followed later by a rapid and excessive deflection growth. The intention of the paper is to describe methods and mathematical models which should be used for reliable prediction of long-term behaviour of prestressed concrete bridges. The comparisons between results of numerical simulations and measurement data will be also mentioned.

Název v anglickém jazyce

Numerical simulation of long-term behaviour of long span prestressed concrete bridges

Popis výsledku anglicky

The design of structures is more and more directed towards the entire lifetime design with multiple concurrent objectives. Apart from durability, the most important factor in the whole life design of reinforced and, in particular, prestressed concrete bridges, is the Service Limit State. From this point of view, prestressed concrete bridges are very sensitive to long-term increase of deflections. This phenomenon has paramount importance for serviceability, durability and long-time reliability of such bridges. Reliable prediction of bridge deflections during their construction as well as during their service life is of crucial importance for achieving good durability and long-term serviceability. Obviously, difficulty of predicting deflections is closely related to the properties of concrete (strength, elastic modulus, nonlinearity, creep, shrinkage, etc.), both initially and with time. The long-term deflection behaviour of long-span prestressed concrete box girder bridges has often deceived engineers monitoring the deflections. A survey of many bridges monitored in various countries showed that all of them have experienced similar deflection histories. It has frequently been experienced that the box girders of many prestressed concrete bridges deflected far more than predicted in design. The deflection evolution has often been counterintuitive, with slowly growing deflections in the early years, followed later by a rapid and excessive deflection growth. The intention of the paper is to describe methods and mathematical models which should be used for reliable prediction of long-term behaviour of prestressed concrete bridges. The comparisons between results of numerical simulations and measurement data will be also mentioned.

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

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e-ISSN

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Počet stran výsledku

1

Strana od-do

60

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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