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Strengthening of the Riddes Viaduct Through UHPFRC-Based Rehabilitation

Autor(en): (INGPHI, Lausanne, Switzerland.)
(INGPHI, Lausanne, Switzerland.)
(INGPHI, Lausanne, Switzerland.)
Medium: Fachartikel
Sprache(n): Englisch
Veröffentlicht in: Structural Engineering International, , n. 4, v. 34
Seite(n): 1-9
DOI: 10.1080/10168664.2023.2194898
Abstrakt: Built in the mid-1970s, the Riddes viaduct is an important viaduct in the Canton of Valais in Switzerland. Thorough inspection of the viaduct revealed structural deterioration of concrete due to alkali–aggregate reaction, as well as corrosion of the prestressing tendons. In an effort to restore the structural integrity of the viaduct, a retrofit intervention that consists of adding a 50 mm layer of an Ultra-High Performance Fibre Reinforced Concrete (UHPFRC) to the deck was proposed. The layer is characterized by its low permeability and excellent mechanical properties. The contribution of the overlay to the load-carrying capacity and stiffness of the viaduct was investigated through a continuum finite element model. Results of the model revealed that the UHPFRC layer significantly enhances the flexural and torsional strength and stiffness of the box girder and ameliorates tensile cracking. The retrofit intervention was deemed beneficial, and the rehabilitation process was carried out.

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Structurae kann Ihnen derzeit diese Veröffentlichung nicht im Volltext zur Verfügung stellen. Der Volltext ist beim Verlag erhältlich über die DOI: 10.1080/10168664.2023.2194898.
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  • Reference-ID
    10731066
  • Veröffentlicht am:
    21.06.2023
  • Geändert am:
    10.11.2024
 
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