EARTHQUAKE RESPONSE PREDICTION OF SEISMICALLY ISOLATED BUILDINGS BASED ON RESPONSE SPECTRUM METHOD CONSIDERING CHANGES IN CHARACTERISTICS OF LEAD RUBBER BEARINGS DUE TO REPEATED DEFORMATION (PART 3) : APPLICATION TO SEISMICALLY ISOLATED BUILDINGS WIT

In the 2016 countermeasures for long-period ground motions (LPGMs) caused by a major Nankai Trough earthquake, the response spectrum method (RSM) specified in Ministry of Construction notification Vol. 2009 was excluded due to the lack of an established methodology. However, RSM enables a comprehensive evaluation of structural safety using design response spectra, independent of individual earthquake characteristics. This study proposes an RSM approach that considers the characteristic changes of lead rubber bearings and oil dampers due to repeated deformation. By comparing it with nonlinear time history analysis, the study examines their correspondence and evaluates the effectiveness of the proposed method.