Software for Operational
Modal Analysis
ARTeMIS |
 |
|
Modal Survey of the Vasco da Gama Bridge
The results presented here were obtained by
performing a re-analysis with ARTeMIS Extractor Pro of the database created
by Professors Alvaro Cunha and Elsa Caetano (Laboratory of Vibrations and
Structural Monitoring of the Faculty of Engineering of the University of
Porto, Portugal) during the dynamic tests performed on the Vasco da Gama
Bridge at the commissioning stage, under contract with Novaponte ACE
The Vasco da Gama bridge is located near Lisbon and is the second crossing
of the Tejo river. Three types of test were done: Ambient vibration test,
free vibration test and measurements in the stay cables. The results shown
below are based on the ambient vibration test. The equipment used were 6
triaxial GeoSIG seismographs synchronized by a portable PC.
Below you can download an AVI movie animating the
mode showed above. The mode has been estimated with the Enhanced Frequency
Domain Decomposition estimator available in the ARTeMIS Extractor Handy and
ARTeMIS Extractor Pro versions.
Download AVI movie
Hint: To get the maximum out of
the downloaded AVI movie, please set your AVI movie player to "Repeat
Forever".
Related Information
Laboratory of Vibrations and Structural Monitoring
of FEUP VIBEST has their own web site at:
www.fe.up.pt/vibest.
A detailed description of the test they did can be found in the following
paper:
Cunha Á., Caetano E. and Delgado, R.: "Dynamic
Tests on a Large Cable-Stayed Bridge. An Efficient Approach". Journal of
Bridge Engineering, ASCE, Vol. 6, No.1, pp.54-62, 2001.
The re-analysis made with ARTeMIS Extractor is
described in the following paper:
Cunha Á., Caetano E., Brincker R., Andersen P.: "Identification from the
Natural Response of Vasco da Gama Bridge", 22nd International Modal Analysis
Conference (IMAC), Dearborn, Michigan, 2004.
Pictures from the Test
The Vasco da Gama bridge in its full length, seen
from northern edge of the Tejo (Tagus) river:
The main span consist of a cable stayed bridge:
The main span seen from the northern edge of the
Tejo river:
The main span seen from the southern edge of the
Tejo river:
The bridge during construction:
|