Study on translational and torsional vibration in high rise isolated building at strong wind based on observation record

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In the present study, it is a purpose to clarify the wind response characteristic by using the past five years observation and the wind tunnel test result for the high rise isolated building about the translational and the torsional vibration when the wind external force acts on.It was confirmed that the torsional vibration reached the value equal with the translational vibration according to the velocity of the wind and the wind direction. The method for calculating shearing force that acted on the seismic isolation layer was proposed from the top mean wind speed. The evaluated-stiffness was about 1.5 times as large as the design. It is thought that natural frequency of the record reached a high value compared with the design because the stiffness when the seismic isolator is slight deformation is high. It was confirmed that the prediction response value that used the wind tunnel test result gave the evaluation of the safety side compared with the observation.