Recent failures of external prestressing grouted tendons: the paramount role of the HDPE duct
Autor: | Laetitia Van Schoors, Bruno Godart, Bastien Vaurigaud, Laurent Gaillet, Didier Germain, Laurent Labourie |
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Přispěvatelé: | Cadic, Ifsttar, Département Matériaux et Structures (MAST), Université Gustave Eiffel, Structures Métalliques et à Cables (MAST-SMC ), Comportement Physico-chimique et Durabilité des Matériaux (MAST-CPDM), Centre d'Etudes et d'Expertise sur les Risques, l'Environnement, la Mobilité et l'Aménagement - Direction Nord-Picardie (Cerema Direction Nord-Picardie), Centre d'Etudes et d'Expertise sur les Risques, l'Environnement, la Mobilité et l'Aménagement (Cerema), Centre d'Etudes et d'Expertise sur les Risques, l'Environnement, la Mobilité et l'Aménagement - Direction Sud-Ouest (Cerema Direction Sud-Ouest) |
Rok vydání: | 2021 |
Předmět: |
Materials science
CONTROLE NON DESTRUCTIF GROUT HDPE 02 engineering and technology DIAGNOSIS PRECONTRAINTE DIAGNOSTIC RUPTURE TESTING NOUVELLE ZELANDE 0202 electrical engineering electronic engineering information engineering medicine REPARATION REPAIR POLYETHYLENE CONFERENCE business.industry EXTERNAL PRESTRESSING 020206 networking & telecommunications CORROSION Structural engineering SURVEILLANCE DE SANTE STRUCTURALE COULIS D&apos SAFETY [SPI.GCIV]Engineering Sciences [physics]/Civil Engineering medicine.anatomical_structure INVESTIGATIONS [SPI.GCIV] Engineering Sciences [physics]/Civil Engineering PONT 020201 artificial intelligence & image processing High-density polyethylene INJECTION business GESTION DES PONTS Duct (anatomy) PRECONTRAINTE EXTERIEURE |
Zdroj: | IABSE Congress 2020, Resilient Technologies for Sustainable Infrastructures IABSE Congress 2020, Resilient Technologies for Sustainable Infrastructures, Feb 2021, Christchurch, France. pp. 775-782 |
ISSN: | 2221-3791 |
DOI: | 10.2749/christchurch.2021.0775 |
Popis: | IABSE Congress 2020, Resilient Technologies for Sustainable Infrastructures , Christchurch, NOUVELLE-ZELANDE, 03-/02/2021 - 05/02/2021; The article describes recent cases of tendon ruptures by corrosion and investigations carried out on some bridges. Several causes related to HDPE ducts have been identified as damages during handling, degradation during threading and tensioning of strands, defective connection of the duct to the anchor body, damage during construction or operation, low quality of HDPE material, etc. A warning note on existing structures with external prestressing has been updated by Cerema in November 2018. It describes the diagnosis methodology based on detailed inspection, destructive and non-destructive techniques. New non-destructive investigation techniques such as guided-wave ultrasonic technique and magnetic leakage field test using permanent magnets and induction coils are presented. Innovative methods of local repair of the ducts are presented. Different protective devices are analyzed with regards of safety of workers in the case of a sudden failure of tendon. |
Databáze: | OpenAIRE |
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