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Modal Properties of a Tall Reinforced Concrete Building Based on the Field Measurement and Analytical Models  

Kim, Ji-Young ((주)대우건설 기술연구원)
Kim, Ju-Yeon ((주)대우건설 기술연구원)
Kim, Mi-Jin (한양대학교 건축공학부)
Yu, Eun-Jong (한양대학교 건축공학부)
Kim, Dae-Young ((주) 대우건설 기술연구원)
Publication Information
Journal of the Computational Structural Engineering Institute of Korea / v.22, no.3, 2009 , pp. 289-296 More about this Journal
Abstract
Natural frequency is a key parameter to determine the seismic and wind loading of tall flexible structures, and to assess the wind-induced vibration for serviceability check. In this study, natural frequencies and associated mode shapes were obtained from measured acceleration data and system identification technique. Subsequently, finite element(FE) models for a tall reinforced concrete buildings were built using a popular PC-based finite element analysis program and calibrated to match their natural frequencies and mode shapes to actual values. The calibration of the FE model included: 1) compensation of modulus of elasticity considering the mix design strength, 2) flexural stiffness of floor slabs, and 3) major non-structural components such as plain concrete walls. Natural frequencies and mode shapes from the final FE model showed best agreement with the measured values.
Keywords
finite element modeling; structural analysis; natural frequency; full-scale field measurement;
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