抄録
We measured micro-tremors of a high-rise steel building to research detailed vertical dynamic characteristics. In this paper, we make clear that there are some vertical modal shapes: axial extension mode of column, beam vibration mode, those coupled of each other, in a narrow frequency band. Furthermore, we verify our results by modeling comparisons of seismic motion results recorded in this building and eigenvalues by a 3-dimensional frame model. We conclude that it is necessary to propose a new analysis model to simulate vertical responses of buildings accurately.
