Available Tests to evaluate Residual Prestressing Forces in Concrete Bridges
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Bibliographic Details
| Author(s): |
Angélica Agredo Chávez
(Luleå University of Technology, Luleå, Sweden)
Jaime Gonzalez-Libreros (Luleå University of Technology, Luleå, Sweden) Gabriel Sas (Luleå University of Technology, Luleå, Sweden) Lennart Elfgren 
(Luleå University of Technology, Luleå, Sweden)
Silvia Bianchi (Politecnico di Milano, Milan, Italy) Fabio Biondini (Politecnico di Milano, Milan, Italy) Brian Kukay (Montana Technological University, Montana, United States) |
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| Medium: | conference paper | ||||
| Language(s): | English | ||||
| Conference: | IABSE Symposium: Challenges for Existing and Oncoming Structures, Prague, Czech Republic, 25-27 May 2022 | ||||
| Published in: | IABSE Symposium Prague 2022 | ||||
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| Page(s): | 1123-1131 | ||||
| Total no. of pages: | 9 | ||||
| DOI: | 10.2749/prague.2022.1123 | ||||
| Abstract: |
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. |
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| Keywords: |
concrete bridges prestressing losses residual prestressing forces evaluation prestressing force methods residual stress in situ tests assessment of PC bridges flexural bearing capacity
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| Copyright: | © 2022 International Association for Bridge and Structural Engineering (IABSE) | ||||
| License: | This creative work is copyrighted material and may not be used without explicit approval by the author and/or copyright owner. |
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