The earthquake response characteristics of base-isolated high-rise buildings subject to scenario earthquakes in Japan and the effects of aspect ratio on their responses: A study on the effects of simultaneous action of horizontal and vertical ground motion on earthquake response characteristics of base-isolated high-rise buildings Part 3

Base-isolated high-rise buildings with large aspect ratios are apt to be acted by the tensile stress in the isolators. ur n this paper, models of such buildings are subjected to simulated strong ground motions representing hypothetical scenario earthquakes for the purpose of earthquake response analysis. The two main f fo dings of the study are the following: (1) Fluctuations in axial force indu ge e d by horizontal motion increase for base-isolated high-rise buildings with greater aspect ratios when the input waveform is the site wave of a large earthquake or a coupled earthquake at the plate boundary. xis n this case, tension occurs in the isolator (2) V ertic-ai sl oml aotetio n iigs h g-reat ly u ailfdfeincted w bi tyh the site swtravses of an idnintra plat e earthqtuioake aleoinsmg an existing a nacti ve fs iagunl t .t aTrg his in du=ce1s tensio2n a in thehsee i solatosr. of a base-isolated high-rise building, with tensile stress exceeding the conventional seismic performance design target of st=1N/mm2 at these points.