2016 Volume 16 Issue 5 Pages 5_33-5_45
Simple evaluation of the degrees of structural damage suffered by high-rise RC buildings after being subjected to long-period strong ground motions is extremely important to the development of life continuity planning for building residents. However, these evaluations cannot be based on seismic and microtremor records because these observation equipment's are not installed in most such buildings. In an effort to address this situation, this study showed that the mean value of a periodic band (1.25T0˜2.25T0, where T0 is initial natural period) in the pseudo velocity response spectrum (pSv) of input ground motions was effective as an index for presuming the degrees of structural damage of the buildings. To calculate the elasto-plastic responses of a SDOF model equivalent to the buildings due to the predicted long-period ground motions by a scenario Nankai earthquake, the dynamic properties of the buildings based on the strong-motion records for the 1995 Great Hanshin Earthquake (Mw 6.9) and the 2011 Great East Japan Earthquake (Mw9.0) were applied to a skeleton curve of the model.
