Smart Structures and Systems

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Real-time structural damage detection using wireless sensing and monitoring system

  • Lu, Kung-Chun (National Taiwan University) ;
  • Loh, Chin-Hsiung (National Taiwan University) ;
  • Yang, Yuan-Sen (National Center for Research on Earthquake Engineering) ;
  • Lynch, Jerome P. (Department of Civil & Environmental Engineering, University of Michigan) ;
  • Law, K.H. (Department of Civil & Environmental Engineering, Stanford University)
  • Received : 2007.05.12
  • Accepted : 2008.01.30
  • Published : 2008.11.25
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Abstract

A wireless sensing system is designed for application to structural monitoring and damage detection applications. Embedded in the wireless monitoring module is a two-tier prediction model, the auto-regressive (AR) and the autoregressive model with exogenous inputs (ARX), used to obtain damage sensitive features of a structure. To validate the performance of the proposed wireless monitoring and damage detection system, two near full scale single-story RC-frames, with and without brick wall system, are instrumented with the wireless monitoring system for real time damage detection during shaking table tests. White noise and seismic ground motion records are applied to the base of the structure using a shaking table. Pattern classification methods are then adopted to classify the structure as damaged or undamaged using time series coefficients as entities of a damage-sensitive feature vector. The demonstration of the damage detection methodology is shown to be capable of identifying damage using a wireless structural monitoring system. The accuracy and sensitivity of the MEMS-based wireless sensors employed are also verified through comparison to data recorded using a traditional wired monitoring system.

Keywords

References

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