TY - JOUR
T1 - A viscoelastic model for the long-term deflection of segmental prestressed box girders
AU - Beltempo, Angela
AU - Bursi, Oreste S.
AU - Cappello, Carlo
AU - Zonta, Daniele
AU - Zingales, Massimiliano
N1 - 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.
PY - 2017/10/25
Y1 - 2017/10/25
N2 - 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.
AB - 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.
KW - prestressed concrete box girders
KW - multidecade deflections
KW - creep
KW - shrinkage
KW - finite element (FE) formulation
UR - http://www.scopus.com/inward/record.url?scp=85032284939&partnerID=8YFLogxK
UR - http://onlinelibrary.wiley.com/journal/10.1111/(ISSN)1467-8667
U2 - 10.1111/mice.12311
DO - 10.1111/mice.12311
M3 - Article
AN - SCOPUS:85032284939
SN - 1093-9687
SP - 1
EP - 15
JO - Computer-Aided Civil and Infrastructure Engineering
JF - Computer-Aided Civil and Infrastructure Engineering
ER -
