This paper describes the amplitude dependent dynamic characteristics of a 9 story building in Sendai before, during, and after the Tohoku earthquake including a fore-shock and some after-shocks. Dynamic hysteresis characteristic are investigated and the origin oriented type hysteresis and the inverse ‘S’ type hysteresis in time are recognized. Occurrence of partial uplifting in the transverse direction is suggested by the induced higher harmonics based on the non-stationary spectra using wavelet
This paper describes the amplitude dependent dynamic characteristics of a 9 story building in Sendai before, during, and after the Tohoku earthquake including a fore-shock and some after-shocks. Dynamic hysteresis characteristic are investigated and the origin oriented type hysteresis and the inverse ‘S’ type hysteresis in time are recognized. Occurrence of partial uplifting in the transverse direction is suggested by the induced higher harmonics based on the non-stationary spectra using wavelet