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Earthquakes and Structures
  Volume 16, Number 3, March 2019, pages 321-327
DOI: http://dx.doi.org/10.12989/eas.2019.16.3.321
 


OMA of model chimney using Bench-Scale earthquake simulator
Sertac Tuhta

 
Abstract
    This study investigated the possibility of using the recorded micro tremor data on ground level as ambient vibration input excitation data for investigation and application Operational Modal Analysis (OMA) on the bench-scale earthquake simulator (The Quanser Shake Table) for model chimney. As known OMA methods (such as EFDD, SSI and so on) are supposed to deal with the ambient responses. For this purpose, analytical and experimental modal analysis of a model chimney for dynamic characteristics was performed. 3D Finite element model of the chimney was evaluated based on the design drawing. Ambient excitation was provided by shake table from the recorded micro tremor ambient vibration data on ground level. Enhanced Frequency Domain Decomposition is used for the output only modal identification. From this study, best correlation is found between mode shapes. Natural frequencies and analytical frequencies in average (only) 1.996% are different.
 
Key Words
    experimental modal analysis; chimney; modal parameter; EFDD; shake table
 
Address
Sertac Tuhta: Faculty of Engineering, Department of Civil Engineering, Ondokuz Mayis University, Atakum/Samsun, Turkey
 

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