The Baixo Sabor dam, whose construction ended in 2014, is a double curvature concrete arch dam 123 m high, built and owned by EDP Produção (a company of EDP-Energias de Portugal Group) in Sabor river, one of the right side tributaries of the river Douro in the North of Portugal. This structure creates a large reservoir whose first filling took place between 2015 and 2016. The estimate of the modal properties of this structure has been developed on the basis of two alternative procedures: (1) the performance of forced vibration tests based on the use of an eccentric mass vibrator and (2) the implementation of a vibration based structural health monitoring system, involving 20 uniaxial accelerometers, used to observe the dam behaviour during the first filling of the reservoir and the two first years of operation. This paper, apart from making a brief description of the dynamic tests performed, as well as, of the main characteristics of the monitoring system and results obtained during the first months of operation, presents a comparative analysis between the modal estimates achieved by the input-output and output-only modal identification techniques employed using the data associated to the performance of the forced vibration tests.
[1]
Filipe Magalhães,et al.
Online automatic identification of the modal parameters of a long span arch bridge
,
2009
.
[2]
Filipe Magalhães,et al.
Recent perspectives in dynamic testing and monitoring of bridges
,
2013
.
[3]
Filipe Magalhães,et al.
Explaining operational modal analysis with data from an arch bridge
,
2011
.
[4]
Filipe Magalhães,et al.
Installation and results from the first 6 months of operation of the dynamic monitoring system of Baixo Sabor arch dam
,
2017
.
[5]
Filipe Magalhães,et al.
DynaMo - Software for vibration based structural health monitoring
,
2012
.