大型振動台加振時の周辺地盤の振動性状と振動抑制に関する実験解析的研究

概要

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The dynamic response characteristics of the foundation and its surrounding soil due to the excitation of the large-scale shaking table are examined in both experimental and analytical aspects. By exciting the shaking table, the response of the foundation and surrounding soil are observed for the sweep- and pulse-type excitation forces. From this observation, Fourier spectrum ratios and the time histories are obtained. First, by examining Fourier spectrum ratios, the dynamic response characteristics are studied with respect to the frequencies, directions and distances. The simulation analysis using the axi-symmetric finite element method is also conducted. Secondly, the non-stationary spectra of the time histories on the soil surface due to the pulse-type excitation are presented and compared with the arival time evaluated from the group velocities of the surface waves. Next, the attenuation characteristics are studied for each direction. Finally, several measures to suppress the soil and foundation responses are studied using the axi-symmetric finite element method.
一般社団法人日本建築学会の論文
1989-03-10