A viscoelastic model for the long-term deflection of segmental prestressed box girders

Beltempo, Angela and Bursi, Oreste S. and Cappello, Carlo and Zonta, Daniele and Zingales, Massimiliano (2017) A viscoelastic model for the long-term deflection of segmental prestressed box girders. Computer-Aided Civil and Infrastructure Engineering. pp. 1-15. ISSN 1467-8667

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    Abstract

    Most of segmental prestressed concrete box girders exhibit excessive multidecade deflections unforeseeable by past and current design codes. To investigate such a behavior, mainly caused by creep and shrinkage phenomena, an effective finite element (FE) formulation is presented in this article. This formulation is developed by invoking the stationarity of an energetic principle for linear viscoelastic problems and relies on the Bazant creep constitutive law. A case study representative of segmental prestressed concrete box girders susceptible to creep is also analyzed in the article, that is, the Colle Isarco viaduct. Its FE model, based on the aforementioned energetic formulation, was successfully validated through the comparison with monitoring field data. As a result, the proposed 1D FE model can effectively reproduce the past behavior of the viaduct and predict its future behavior with a reasonable run time, which represents a decisive factor for the model implementation in a decision support system.

    Author(s):Beltempo, Angela, Bursi, Oreste S., Cappello, Carlo, Zonta, Daniele ORCID: https://orcid.org/0000-0002-7591-9519 and Zingales, Massimiliano
    Item type:Article
    ID code:62965
    Notes:This is the peer reviewed version of the following article: Beltempo, A, Bursi, OS, Cappello, C, Zonta, D & Zingales, M 2017, 'A viscoelastic model for the long-term deflection of segmental prestressed box girders' Computer-Aided Civil and Infrastructure Engineering, pp. 1-15, which has been published in final form at https://doi.org/10.1111/mice.12311. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.
    Keywords:prestressed concrete box girders, multidecade deflections , creep , shrinkage , finite element (FE) formulation, Engineering (General). Civil engineering (General), Civil and Structural Engineering, Computer Science Applications, Computer Graphics and Computer-Aided Design, Computational Theory and Mathematics
    Subjects:Technology > Engineering (General). Civil engineering (General)
    Department:Faculty of Engineering > Civil and Environmental Engineering
    Depositing user: Pure Administrator
    Date deposited:22 Jan 2018 12:35
    Last modified:30 Aug 2019 03:54
    Related URLs:
    URI:https://strathprints.strath.ac.uk/id/eprint/62965
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