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Available Tests to evaluate Residual Prestressing Forces in Concrete Bridges
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Fire Engineering.ORCID iD: 0009-0009-8168-2085
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Fire Engineering.ORCID iD: 0000-0003-3548-6082
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Fire Engineering.ORCID iD: 0000-0002-8682-876x
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Fire Engineering.ORCID iD: 0000-0002-0560-9355
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2022 (English)In: IABSE Symposium Prague 2022: Challenges for Existing and Oncoming Structures - Report, International Association for Bridge and Structural Engineering / [ed] František Wald; Pavel Ryjáček, International Association for Bridge and Structural Engineering, 2022, p. 1123-1131Conference paper, Published paper (Refereed)
Abstract [en]

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.

Place, publisher, year, edition, pages
International Association for Bridge and Structural Engineering, 2022. p. 1123-1131
Keywords [en]
assessment of PC bridges, concrete bridges, evaluation prestressing force, flexural bearing capacity, in situ tests, methods residual stress, prestressing losses, residual prestressing forces
National Category
Infrastructure Engineering
Research subject
Structural Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-92198DOI: 10.2749/prague.2022.1123Scopus ID: 2-s2.0-85133539091OAI: oai:DiVA.org:ltu-92198DiVA, id: diva2:1683865
Conference
IABSE Symposium Prague 2022: Challenges for Existing and Oncoming Structures, Prague, Czech Republic, May 25-27, 2022
Note

ISBN for host publication: 978-3-85748-181-9

Available from: 2022-07-19 Created: 2022-07-19 Last updated: 2024-03-14Bibliographically approved

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