Techno Press
Techno Press

Smart Structures and Systems   Volume 12, Number 3, September-October 2013, pages 309-325
Online damage detection using pair cointegration method of time-varying displacement
Cui Zhou1, Hong-Nan Li, Dong-Sheng Li, You-Xin Lin and Ting-Hua Yi

Abstract     [Full Text]
    Environmental and operational variables are inevitable concerns by researchers and engineers when implementing the damage detection algorithm in practical projects, because the change of structural behavior could be masked by the conditions in a large extent. Thus, reliable damage detection methods should have a virtue of immunity from environmental and operational variables. In this paper, the pair cointegration method was presented as a novel way to remove the effect of environmental variables. At the beginning, the concept and procedure of this approach were introduced, and then the theoretical formulation and numerical simulations were put forward to illustrate the feasibility. The jump exceeding the control limit in the residual indicates the occurrence of damage, while the direction and magnitude imply the most potential damage location. In addition, the simulation results show that the proposed method has strong ability to resist the noise.
Key Words
    structural health monitoring; damage detection; environmental variable; pair cointegration; time series; data-based model
Cui Zhou1, Hong-Nan Li, Dong-Sheng Li, and Ting-Hua Yi : Faculty of Infrastructure Engineering, Dalian University of Technology, Dalian, China
You-Xin Lin : Guangdong Electrical Company, Guangzhou, China

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