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Wind and Structures
  Volume 12, Number 5, August 2009 , pages 401-412
DOI: https://doi.org/10.12989/was.2009.12.5.401
 


Monitoring of tall slender structures by GPS measurements
Tadeusz Chmielewski, Peter Breuer, Piotr Gorski and Eduard Konopka

 
Abstract
    A method is applied for the estimation of structural damage of tall slender structures using natural frequency and displacements measurements by GPS. The relationship between the variation in the global stiffness matrix (or in the stiffness of each finite element) and the change in the natural frequencies of the structure is given. In engineering practice the number of frequencies which can be derived by GPS measurement of long-period structures will be equal to one, two or three first natural frequencies. This allows us in initial studies to detect damage with frequency changes based on forward methods in which the measured frequencies are compared with the predicted analytical data. This idea, of health monitoring from possible changes to natural frequencies, or from a statement of excessive displacements is applied to the Stuttgart TV Tower.
 
Key Words
    full-scale measurements; GPS; monitoring; the Stuttgart TV Tower; wind.
 
Address
Tadeusz Chmielewski; Opole University of Technology, ul. Katowicka 48, 45-061 Opole, Poland
Peter Breuer; University of Applied Sciences, Schellingstrasse 24, 70174 Stuttgart, Germany
Piotr Gorski; Opole University of Technology, ul. Katowicka 48, 45-061 Opole, Poland
Eduard Konopka; University of Applied Sciences, Schellingstrasse 24, 70174 Stuttgart, Germany
 

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