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A study of the influence of environmental effects on the behaviour of a pre-stressed concrete viaduct.

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Title: A study of the influence of environmental effects on the behaviour of a pre-stressed concrete viaduct.
Authors: Howells, R. W.1, Lark, R. J.1, Barr, B. I. G.1
Source: Structural Concrete. Sep2005, Vol. 6 Issue 3, p89-100. 12p.
Subjects: Prestressed concrete construction, Viaducts, Strains & stresses (Mechanics), Concrete construction, Bridges, Humidity
Abstract: This paper addresses the influence that changing environmental effects have on the strains developed in a major pre-stressed concrete viaduct. The changes in strain, resulting from variations in temperature and relative humidity, were analysed over a period of one year. It was found that changes in temperature had a greater influence on the strain behaviour of the structure than changes in relative humidity, with strain variations of up to 75 microstrain (μϵ) being recorded. A further study was conducted on the effect that changing temperature has on the strain behaviour of the viaduct during each of the four seasons. It was observed that the variation of temperature over the course of a week resulted in strains of up to 15 μϵ. Finally, in both studies, a linear relationship was observed between strain and temperature, although these relationships differ slightly depending on the season, and the segment location within the span. [ABSTRACT FROM AUTHOR]
Copyright of Structural Concrete is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 18871423
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Data: A study of the influence of environmental effects on the behaviour of a pre-stressed concrete viaduct.
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  Data: <searchLink fieldCode="AR" term="%22Howells%2C+R%2E+W%2E%22">Howells, R. W.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Lark%2C+R%2E+J%2E%22">Lark, R. J.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Barr%2C+B%2E+I%2E+G%2E%22">Barr, B. I. G.</searchLink><relatesTo>1</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Structural+Concrete%22">Structural Concrete</searchLink>. Sep2005, Vol. 6 Issue 3, p89-100. 12p.
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  Data: <searchLink fieldCode="DE" term="%22Prestressed+concrete+construction%22">Prestressed concrete construction</searchLink><br /><searchLink fieldCode="DE" term="%22Viaducts%22">Viaducts</searchLink><br /><searchLink fieldCode="DE" term="%22Strains+%26+stresses+%28Mechanics%29%22">Strains & stresses (Mechanics)</searchLink><br /><searchLink fieldCode="DE" term="%22Concrete+construction%22">Concrete construction</searchLink><br /><searchLink fieldCode="DE" term="%22Bridges%22">Bridges</searchLink><br /><searchLink fieldCode="DE" term="%22Humidity%22">Humidity</searchLink>
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  Data: This paper addresses the influence that changing environmental effects have on the strains developed in a major pre-stressed concrete viaduct. The changes in strain, resulting from variations in temperature and relative humidity, were analysed over a period of one year. It was found that changes in temperature had a greater influence on the strain behaviour of the structure than changes in relative humidity, with strain variations of up to 75 microstrain (μϵ) being recorded. A further study was conducted on the effect that changing temperature has on the strain behaviour of the viaduct during each of the four seasons. It was observed that the variation of temperature over the course of a week resulted in strains of up to 15 μϵ. Finally, in both studies, a linear relationship was observed between strain and temperature, although these relationships differ slightly depending on the season, and the segment location within the span. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Structural Concrete is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1680/stco.2005.6.3.89
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      – Code: eng
        Text: English
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        PageCount: 12
        StartPage: 89
    Subjects:
      – SubjectFull: Prestressed concrete construction
        Type: general
      – SubjectFull: Viaducts
        Type: general
      – SubjectFull: Strains & stresses (Mechanics)
        Type: general
      – SubjectFull: Concrete construction
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      – SubjectFull: Bridges
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      – SubjectFull: Humidity
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              Text: Sep2005
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