Causes of long-time deflections of large-span prestressed concrete box girders and recommendations how to avoid them

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F08%3A00145244" target="_blank" >RIV/68407700:21110/08:00145244 - isvavai.cz</a>

Alternative codes found

RIV/68407700:21110/08:#0000045

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Causes of long-time deflections of large-span prestressed concrete box girders and recommendations how to avoid them

Original language description

Large-span prestressed concrete box girders typically exhibit during the initial years deceptively small deflections, or the deflections may even go upwards but after about three to ten years, the deflections may begin to increase rapidly and they becomeexcessive. It is shown that, in order to predict the deflections correctly, one must use a creep and shrinkage model that realistically describes the moisture diffusion process, which causes that the shrinkage and drying creep of the thick bottom slab of the box cross section are greatly delayed compared to the thin top slab. This delay cannot be predicted with the classical approach, in which either the shrinkage strain and the creep coefficient (or compliance function) are considered as uniform throughout the cross section, or the thickness effect is simply described by a multiplicative factor on shrinkage strain.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

JM - Structural engineering

OECD FORD branch

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Project

<a href="/en/project/1F45E%2F020%2F120" target="_blank" >1F45E/020/120: Analysis of causes and proposal of precautions of excessive deflections growth in long-span prestressed concrete bridges.</a><br>

Continuities

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

Publication year

2008

Confidentiality

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

Name of the periodical

Transactions on Transport Sciences

ISSN

1802-971X

e-ISSN

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Volume of the periodical

1

Issue of the periodical within the volume

3

Country of publishing house

CZ - CZECH REPUBLIC

Number of pages

4

Pages from-to

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UT code for WoS article

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EID of the result in the Scopus database

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