Abstract
We investigated the influence of time discretization of ground motions on their spectral characteristics, and response of multi-degree of freedom systems. Two interpolation functions are investigated; a piecewise linear interpolation, and a cubic spline interpolation. Response spectra of three earthquake motions indicate that difference appears for frequencies above 5Hz. Similar earthquake response analyses of model ground show a very small difference in acceleration time history, but large differences in response spectra for frequencies above 20Hz. The analyses show that the effect re-sampling of ground motions are negligible in the most frequency range of engineering interest For some cases effect on high frequency range might be important.
