ANALYTICAL AND EXPERIMENTAL MODAL ANALYSIS OF GFRP BENCHMARK STRUCTURE USING SHAKE TABLE
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Abstract
In this study was investigated of possibility using the recorded micro tremor data on ground level as ambient vibration input excitation data for determination and application Operational Modal Analysis (OMA) for GFRP benchmark structure. As known OMA methods (such as FDD, EFDD, SSI-UPC/SSI-PC/SSI-CVA and so on) are supposed to deal with the ambient responses. For this purpose, analytical and experimental modal analysis of GFRP benchmark structure for modal properties was evaluated. 3D Finite element model of the building was evaluated SAP2000 for the GFRP benchmark structure based on the design drawing. Ambient excitation was provided from the recorded micro tremor ambient vibration data on ground level. Enhanced Frequency Domain Decomposition (EFDD) is used for the output only modal identification. From this study, very best correlation is found between mode shapes and frequencies. Natural frequencies and analytical frequencies in average (only) %1.24 are differences.
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