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Structural Engineering and Mechanics
  Volume 61, Number 2, January25 2017 , pages 267-274
DOI: https://doi.org/10.12989/sem.2017.61.2.267
 

Application of OMA on the bench-scale earthquake simulator using micro tremor data
Azer A. Kasimzade and Sertac Tuhta

 
Abstract
    In this study was investigated of possibility 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 steel structures. 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 steel structure for dynamic characteristics was evaluated. 3D Finite element model of the building was evaluated for the model steel structure 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) 2.8% are differences.
 
Key Words
    experimental modal analysis; modal parameter; EFDD; shake table
 
Address
Azer A. Kasimzade and Sertac Tuhta: Ondokuz Mayis University, Faculty of Engineering, Department of Civil Engineering, Atakum/Samsun, Turkey
 
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