Frequency and Damping Wandering in Existing Buildings Using the Random Decrement Technique
GUEGUEN ; LANGLAIS ; ROUX ; SCHINKMANN ; DOUSTE-BACQUE
Type de document
COMMUNICATION AVEC ACTES INTERNATIONAL (ACTI)
Langue
anglais
Auteur
GUEGUEN ; LANGLAIS ; ROUX ; SCHINKMANN ; DOUSTE-BACQUE
Résumé / Abstract
With the increasing use of permanent, continuous and real-time networks, ambient vibrations can provide a simple tool for the identification of dynamic building parameters. This study is focused on the long-term variation of frequency and damping in several buildings, using the Random Decrement Technique (RDT). RDT provides a fast, robust and accurate long-term analysis and improves the reliability of frequency and damping measurements for structural health monitoring. This reveals particularly useful information in finding out precisely how far changes in modal parameters can be related to changes in physical properties. This paper highlights the reversible changes of the structureÕs dynamic parameters, correlated with external forces, such as temperature and exposure to the sun. Contrasting behaviours are observed, including correlation and anti-correlation with temperature variations.
