Standard Article

Suspended Roof of Braga Sports Stadium, Portugal

Civil Engineering Applications

  1. Álvaro Cunha,
  2. Filipe Magalhães,
  3. Elsa Caetano

Published Online: 15 SEP 2009

DOI: 10.1002/9780470061626.shm174

Encyclopedia of Structural Health Monitoring

Encyclopedia of Structural Health Monitoring

How to Cite

Cunha, Á., Magalhães, F. and Caetano, E. 2009. Suspended Roof of Braga Sports Stadium, Portugal. Encyclopedia of Structural Health Monitoring. .

Author Information

  1. University of Porto, Faculty of Engineering, Porto, Portugal

Publication History

  1. Published Online: 15 SEP 2009

Abstract

Temporary ambient vibration monitoring of the suspended roof of the new Braga Sports Stadium was developed with the purpose of identifying modal properties through operational modal analysis. This experimental work allowed the validation of a numerical modeling that takes into account the geometric nonlinear structural behavior and the progressive application of loads during the construction phase. Special attention was given for the identification of modal damping ratios, owing to the necessity of analyzing the susceptibility of the suspended roof to buffeting effects. Modal damping ratios were estimated from data provided by free, forced, and ambient vibration tests, using an improved implementation of the enhanced frequency domain method and the covariance-driven stochastic subspace identification (SSI-COV) method.

Keywords:

  • suspended roof;
  • ambient vibration test;
  • free vibration tests;
  • output-only modal identification;
  • geometric nonlinearities;
  • finite element correlation