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Frequency and Damping Wandering in Existing Buildings Using the Random Decrement Technique

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.
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Submitted on : Thursday, July 10, 2014 - 10:02:19 AM
Last modification on : Saturday, January 15, 2022 - 3:49:13 AM
Long-term archiving on: : Friday, October 10, 2014 - 11:05:57 AM


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  • HAL Id : hal-01022068, version 1


Philippe Gueguen, Mickael Langlais, Philippe Roux, Jakub Schinkmann, Isabelle Douste-Bacqué. Frequency and Damping Wandering in Existing Buildings Using the Random Decrement Technique. EWSHM - 7th European Workshop on Structural Health Monitoring, IFFSTTAR, Inria, Université de Nantes, Jul 2014, Nantes, France. ⟨hal-01022068⟩



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