建設時の継続的な振動観測に基づく高層建物の振動特性

概要

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By use of a newly developed network connected vibration measuring system which is suitable for continuous observation at construction sites, dynamic characteristics of high-rise buildings and their change during construction are discussed. Hundreds of ambient vibration data and several seismic response records were obtained at two neighboring high-rise buildings in approximately twenty months of construction. Observed response characteristics, estimated natural periods and damping ratios are shown with the change of building height under the same soil and foundation condition. Characteristics of higher modes and soil-structure interaction effect are also discussed. By use of forced and ambient vibration data, amplitude-dependent characteristics are clearly displayed as a relation with the velocity response which is proved to be highly correlated with the average deformation angle of stories.
2008-03-30