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Operational Modal Monitoring of Ancient Structures using Wireless Technology

  • Rafael Aguilar
  • Luis F. Ramos
  • Paulo B. Lourenço
  • Ricardo Severino
  • Ricardo Gomes
  • Paulo Gandra
  • Mario Alves
  • Eduardo Tovar
Conference paper
Part of the Conference Proceedings of the Society for Experimental Mechanics Series book series (CPSEMS)

Abstract

Operational Modal Analysis is currently applied in structural dynamic monitoring studies using conventional wired based sensors and data acquisition platforms. This approach, however, becomes inadequate in cases where the tests are performed in ancient structures with esthetic concerns or in others, where the use of wires greatly impacts the monitoring system cost and creates difficulties in the maintenance and deployment of data acquisition platforms. In these cases, the use of sensor platforms based on wireless and MEMS would clearly benefit these applications. This work presents a first attempt to apply this wireless technology to the structural monitoring of historical masonry constructions in the context of operational modal analysis. Commercial WSN platforms were used to study one laboratory specimen and one of the structural elements of a XV century building in Portugal. Results showed that in comparison to the conventional wired sensors, wireless platforms have poor performance in respect to the acceleration time series recorded and the detection of modal shapes. However, for frequency detection issues, reliable results were obtained, especially when random excitation was used as noise source.

Keywords

Ambient Noise Inverted Pendulum Stabilization Diagram Random Excitation Hankel Matrix 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  • Rafael Aguilar
    • 1
  • Luis F. Ramos
    • 1
  • Paulo B. Lourenço
    • 1
  • Ricardo Severino
    • 2
  • Ricardo Gomes
    • 2
  • Paulo Gandra
    • 2
  • Mario Alves
    • 2
  • Eduardo Tovar
    • 2
  1. 1.Department of Civil Engineering – ISISEUniversity of MinhoGuimarãesPortugal
  2. 2.CISTER/IPP-HURRAY! Research Unit - School of Engineering Polytechnic Institute of PortoPortoPortugal

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