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Available Tests to evaluate Residual Prestressing Forces in Concrete Bridges

 Available Tests to evaluate Residual Prestressing Forces in Concrete Bridges
Auteur(s): , , , ORCID,
Présenté pendant IABSE Symposium: Challenges for Existing and Oncoming Structures, Prague, Czech Republic, 25-27 May 2022, publié dans , pp. 1123-1131
DOI: 10.2749/prague.2022.1123
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The reduction of the structural capacity and eventual collapse of existing concrete bridges is often related to the loss of the initial prestressing forces. This loss can be associated to immediate...
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Détails bibliographiques

Auteur(s): (Luleå University of Technology, Luleå, Sweden)
(Luleå University of Technology, Luleå, Sweden)
(Luleå University of Technology, Luleå, Sweden)
ORCID (Luleå University of Technology, Luleå, Sweden)
(Politecnico di Milano, Milan, Italy)
(Politecnico di Milano, Milan, Italy)
(Montana Technological University, Montana, United States)
Médium: papier de conférence
Langue(s): anglais
Conférence: IABSE Symposium: Challenges for Existing and Oncoming Structures, Prague, Czech Republic, 25-27 May 2022
Publié dans:
Page(s): 1123-1131 Nombre total de pages (du PDF): 9
Page(s): 1123-1131
Nombre total de pages (du PDF): 9
DOI: 10.2749/prague.2022.1123
Abstrait:

The reduction of the structural capacity and eventual collapse of existing concrete bridges is often related to the loss of the initial prestressing forces. This loss can be associated to immediate or time dependent factors such as elastic shortening, creep, relaxation, loading, and cracking, among others. In addition, environmental factors can lead to corrosion of the strands with the subsequent reduction of their area, loss of bond with the concrete and additional cracking which in turn will influence the value of the residual prestress force and the bridge capacity. Therefore, the evaluation of such losses is critical in the decision-making process of defining a financial and environmental cost optimized intervention strategies (e.g., strengthening or replacement). In this paper, a detailed literature review regarding destructive and non-destructive methods for measuring the residual force in prestressed concrete bridges is carried out and used to develop a database of existing experimental tests.

Mots-clé:
Pont en béton
Copyright: © 2022 International Association for Bridge and Structural Engineering (IABSE)
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