2019 Volume 19 Issue 6 Pages 6_181-6_192
As for buildings constructed on soil with inclined bedrock, pile foundations with different length or combination of piles and raft are commonly used. In this case, torsional response can be easily excited due to time lag of incident waves from the inclined bedrock. The vibration characteristics of this kind of buildings should be studied sufficiently based on observed records. In this study, we carried out ambient vibration measurements in a seismically-isolated building to extract the structural dynamic properties, along with ground surface and the foundation. In addition, the structural response properties generated by nearby train induced vibration and small earthquakes were studied, and compared with those from ambient vibration.
