This paper discusses objectives, methodologies and results from a campaign of non-destructive investigations on a cable-stayed bridge in Lisbon (Portugal). Among the investigations held, the campaign encompassed dynamic testing of the stay cables in order to identify their natural vibration frequencies and to estimate their tension force. A frequency-domain output-only approach was carried out to identify the natural frequencies of the cables. Subsequently, the cable tension force was estimated on the basis of the flat taut string model. In an advantageous and cost-effective way, vibration tests were carried out without the interruption of the vehicular traffic. Results of the testing campaign were finally incorporated in the bridge condition assessment and used to provide both short- and long-term maintenance prescriptions.

Non-Destructive Testing of a Cable-Stayed Bridge in Lisbon / Codacci-Pisanelli, Emanuele; Reggio, Anna. - STAMPA. - 435:(2024), pp. 457-465. (Intervento presentato al convegno Italian Concrete Conference, ICC 2022 tenutosi a Naples (Ita) nel 12 October 2022 through 15 October 2022) [10.1007/978-3-031-43102-9_35].

Non-Destructive Testing of a Cable-Stayed Bridge in Lisbon

Reggio, Anna
2024

Abstract

This paper discusses objectives, methodologies and results from a campaign of non-destructive investigations on a cable-stayed bridge in Lisbon (Portugal). Among the investigations held, the campaign encompassed dynamic testing of the stay cables in order to identify their natural vibration frequencies and to estimate their tension force. A frequency-domain output-only approach was carried out to identify the natural frequencies of the cables. Subsequently, the cable tension force was estimated on the basis of the flat taut string model. In an advantageous and cost-effective way, vibration tests were carried out without the interruption of the vehicular traffic. Results of the testing campaign were finally incorporated in the bridge condition assessment and used to provide both short- and long-term maintenance prescriptions.
2024
978-3-031-43101-2
978-3-031-43102-9
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/2982199