常時微動計測，強震観測および解析に基づく傾斜基盤を有する地盤上に建つ免震建物の上下動特性

Abstract

Vertical dynamic characteristics of the seismically isolated building constructed on the ground with inclined bedrock were investigated using ambient vibration measurement, strong motion observation, and seismic response analyses. Coupling effects of SH-, SV-and Pwave incidences were considered for seismic response calculation in the soil-pile-structure interaction analysis. Amplitude of the vertical input motion at foundation and the vertical response of the building was significantly reduced due to the constraining effect by pile foundations. This effect was especially obvious when the SV wave inputs to the inclined bedrock.