Assessment of residual prestress in existing concrete bridges: The Kalix bridge

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Agredo Chávez, AngélicaLuleå tekniska universitet,Byggkonstruktion och brand (author)

Assessment of residual prestress in existing concrete bridges: The Kalix bridge

Article/chapterEnglish2024

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Elsevier,2024
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LIBRIS-ID:oai:DiVA.org:ltu-105634
https://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-105634URI
https://doi.org/10.1016/j.engstruct.2024.118194DOI

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Language:English
Summary in:English

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Subject category:ref swepub-contenttype
Subject category:art swepub-publicationtype

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Validerad;2024;Nivå 2;2024-05-31 (hanlid);Funder: Interreg Aurora; Full text license: CC BY
The direct socio-economic consequences of the deterioration of aging infrastructure systems have triggered a continuous process of revising and updating current design standards and guidelines for critical network components. Specifically, long-term degradation processes demand the analysis and evaluation of vital structural assets such as prestressed concrete bridges. It is crucial to develop theoretically consistent, user-friendly, and non-destructive methodologies that engineering professionals can employ to prevent and mitigate potential catastrophic outcomes during the service life of these bridges. This study provides a thorough review of the available testing methods employed over the years for prestressed concrete bridges and introduces a comprehensive framework for evaluating existing methods for residual prestress force assessment. Through a multi-criteria selection process, the three most feasible tests were designed and carried out on an existing 66-year-old balanced cantilever box girder bridge exposed to freezing temperatures that affected the instrumentation plan and test execution. Finally, predictive models compliant with standard codes were calibrated based on the experimental results and the life cycle loss of prestress forces was evaluated to assess relevant bounding intervals. Findings reveal limited on-site testing and discrepancies between calculated residual forces and predictions by standard codes. The saw cut method showed a 18% difference from the initial applied prestress according to the prestress protocol, suggesting the use of a cover meter and concrete modulus evaluation for improved accuracy. The strand cutting method resulted in a 14% difference, emphasizing the need for stress redistribution assessment. The second-order deflection method showed a 6% difference, indicating a focus on enhanced boundary conditions and thorough sensitivity analysis for future investigations.

Subject headings and genre

TEKNIK OCH TEKNOLOGIER Samhällsbyggnadsteknik Infrastrukturteknik hsv//swe
ENGINEERING AND TECHNOLOGY Civil Engineering Infrastructure Engineering hsv//eng
TEKNIK OCH TEKNOLOGIER Samhällsbyggnadsteknik Husbyggnad hsv//swe
ENGINEERING AND TECHNOLOGY Civil Engineering Building Technologies hsv//eng
Box girder
Concrete bridges
Diagnostics
Experimental tests
Residual prestress
Structural assessment
Byggkonstruktion
Structural Engineering

Added entries (persons, corporate bodies, meetings, titles ...)

Gonzalez-Libreros, JaimeLuleå tekniska universitet,Byggkonstruktion och brand(Swepub:ltu)jaigon (author)
Wang, Chao,1991-Luleå tekniska universitet,Byggkonstruktion och brand(Swepub:ltu)chawan (author)
Capacci, LucaDepartment of Civil and Environmental Engineering, Politecnico di Milano, Milan, Italy (author)
Biondini, FabioDepartment of Civil and Environmental Engineering, Politecnico di Milano, Milan, Italy (author)
Elfgren, Lennart,Senior Professor,1942-Luleå tekniska universitet,Byggkonstruktion och brand(Swepub:ltu)elfgren (author)
Sas, GabrielLuleå tekniska universitet,Byggkonstruktion och brand(Swepub:ltu)gabsas (author)
Luleå tekniska universitetByggkonstruktion och brand (creator_code:org_t)

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In:Engineering structures: Elsevier3110141-02961873-7323

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