Science China Technological Sciences

, Volume 54, Issue 7, pp 1930–1939

Abnormality diagnosis of cracks in the concrete dam based on dynamical structure mutation

Article

Abstract

A method of the fuzzy cross-correlation factor exponent in dynamics is researched and proposed to diagnose abnormality of cracks in the concrete dam. Moreover, the Logistic time series changing from period-doubling bifurcation to chaos is tested first using this method. Results indicate that it can distinguish inherent dynamics of time series and can detect mutations. Considering that cracks in the concrete dam constitute an open, dissipative and complex nonlinear dynamical system, a typical crack on the downstream face of a concrete gravity arch dam is analyzed with the proposed method. Two distinct mutations are discovered to indicate that the abnormality diagnosis of cracks in the concrete dam is achieved dynamically through this method. Furthermore, because it can be directly utilized in the measured crack opening displacement series to complete abnormality diagnosis, it has a good prospect for practical applications.

Keywords

dynamical structure mutation cracks in the concrete dam method of the fuzzy cross-correlation factor exponent in dynamics abnormality diagnosis of cracks 

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Copyright information

© Science China Press and Springer-Verlag Berlin Heidelberg 2011

Authors and Affiliations

  1. 1.State Key Laboratory of Hydrology-Water Resources and Hydraulic EngineeringHohai UniversityNanjingChina
  2. 2.National Engineering Research Center of Water Resources Efficient Utilization and Engineering SafetyNanjingChina
  3. 3.College of Water Conservancy and Hydropower EngineeringHohai UniversityNanjingChina

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