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Case Studies: |
Dynamic Testing of the Braga Stadium Suspended Roof (EURO 2004)
The results
presented here
were obtained by
Professors
Álvaro Cunha,
Elsa Caetano and
Filipe Magalhães
(Laboratory of
Vibrations and
Structural
Monitoring of
the Faculty of
Engineering of
the University
of Porto,
Portugal),
performing the
analysis with
ARTeMIS
Extractor Pro of
the database
created during
the dynamic
tests of the New
Braga Stadium
Suspended Roof,
under contract
with the
designer
AFAssociados.
The New Braga
Stadium is a
masterpiece of
architecture,
constructed for
the European
Football
Championship
EURO’2004, and
is located at
the Northern
part of
Portugal. The
results shown
below are based
on the ambient
vibration test
performed using
4 triaxial
GeoSIG
seismographs
synchronized by
GPS sensors.
Below
you can download AVI
movies animating the
first 10 modes. The modes
have been estimated with
the Frequency
Domain Decomposition
estimator available in
all versions of the ARTeMIS Extractor.
Hint: To get the
maximum out of the
downloaded AVI movie,
please set your AVI
movie player to "Repeat
Forever".
The Canonical Variate
Analysis (CVA)
Stochastic Subspace
Identification (SSI)
estimator was also
applied in order to
extract damping ratios
of the modes. Below a
typical stabilization
diagram is shown:
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:
F.
Magalhães, E.
Caetano,
Á.
Cunha
Operational Modal
Analysis of the Braga
Sports Stadium Suspended
Roof
Proceedings of The 24th International
Modal Analysis Conference (IMAC), St.
Louis, Missouri, 2006.
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