Vibration control and monitoring on the new footbridge over the Ave River in Santo Tirso, Portugal

• Type: Article in International Conference Proceedings Book
• Date: 2014

Authors

Moreira, RF (Author) Other; Caetano, E. (Author) FEUP; Cunha, A. (Author) FEUP

Conference proceedings International

Title: EURODYN 2014: IX INTERNATIONAL CONFERENCE ON STRUCTURAL DYNAMICS

Pages: 945-950

9th International Conference on Structural Dynamics (EURODYN)

Porto, PORTUGAL, JUN 30-JUL 02, 2014

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Other information

Authenticus ID: P-00G-AWD

Abstract (EN): This paper describes the numerical and experimental dynamic studies developed during structural design and after construction of the new footbridge over the Ave River in Santo Tirso, Portugal, as well as the results obtained over a year with the installed permanent monitoring system. The bridge is composed by a steel arch, with a 60m central span and 6m rise, in a full extension of 84m. Its vulnerability to human induced vibrations was identified early, in the first studies developed by the design office, and thoroughly investigated in the following work phases. Numerical models results indicated that a vibration control system would be needed. In order to accurately identify the bridge's dynamic properties and fully characterize structural response to critical defined pedestrian loads, several site tests were done. The obtained results supported the decision to install 2 tuned mass dampers (TMD's) and allowed for their sizing and efficiency evaluation. The installed permanent monitoring system comprehends sensors installed along the deck and on the TMD's. The former provide information on the measured vibration levels, while the latter are used to detect the activation periods of the mitigation system. Based on the analysis of this data, the effectiveness of the mitigation system is addressed.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 6