Modal identification of a double-curvature concrete arch dam under natural excitation: analysis of the accuracy achieved with different types of accelerometers

• Type: Article in International Conference Proceedings Book
• Date: 2019

Authors

Álvaro Cunha (Author) FEUP; Sérgio Pereira (Author) FEUP; Carlos Moutinho (Author) FEUP; Filipe Magalhães (Author) FEUP

Conference proceedings International

Title: RILEM Spring Convention and Conference Sustainable Materials, Systems and Structures (SMSS 2019)

Pages: 587-594

Indexing

ISI Proceedings

Scopus

Other information

Abstract (EN): At present time, the accurate estimation of modal properties of large civil structures (e.g. buildings, bridges, chimneys, wind turbines) can be easily achieved by applying state of art output-only modal identification methods (e.g. SSI-cov, SSI-Data, p-LSCF) to the data obtained with ambient vibration tests performed with appropriate sensors and data acquisition systems. However, when dealing with massive structures like concrete dams, the signals are very low (of the order of micro-g) and the signal to noise ratio very challenging in terms of modal identification. In this context, this paper describes an investigation developed on the Alto Lindoso dam (a double curvature arch dam in the North of Portugal, 110 m high) with the purpose of analysing the level of accuracy achieved, in terms of modal identification with the alternative use of different type of accelerometers (force-balance, piezoelectric, MEMS), developing a complete ambient vibration test along the dam crest.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 8