IMPACT OF SEISMIC HAZARD ON THE GROUND RESPONSE IN EASTERN NORTH AMERICA

ABSTRACT: In practice, dynamic nonlinear simulations are performed by selecting ground motions to match the uniform hazard spectrum (UHS) over a period range, for a pair of magnitude and distance (M-R). The latter are being picked based on a deaggregation analysis. The selection of the seismic scenario and the period range over which the ground motions are scaled, has a significant impact on the selection of ground motions, and the results of the simulations. In Eastern North-America (ENA), ground motion selection is further complicated by the lack of well-recorded ground motions at M-R of interest. This paper discusses the influence of the selection of the seismic hazard scenarios on the wave propagations in a soil profile. Dynamic non-linear simulations are conducted for six scenarios. The results obtained are compared in terms of response spectra, level of amplification, acceleration profile, and factor of safety to liquefaction, to determine the impact of the selection of seismic scenarios on the propagation of seismic waves.