HR: 0800h
AN: S21B-0209    [Abstracts]
TI: Broadband Simulation Of Ground Motion In Sherman Oaks During The 1994 Northridge Earthquake
AU: * Onder, E
EM: eonder@andrew.cmu.edu
AF: Carnegie Mellon University Civil and Environmental Engineering, 5000 Forbes Avenue, Pittsburgh, PA 15213
AU: Askan, A
EM: aaskan@andrew.cmu.edu
AF: Carnegie Mellon University Civil and Environmental Engineering, 5000 Forbes Avenue, Pittsburgh, PA 15213
AU: Bielak, J
EM: jbielak@andrew.cmu.edu
AF: Carnegie Mellon University Civil and Environmental Engineering, 5000 Forbes Avenue, Pittsburgh, PA 15213
AU: Hisada, Y
EM: hisada@cc.kogakuin.ac.jp
AF: Kogakuin University, 1-24-2 Nishi-Shinjuku, Shinjuku-ku, Tokyo, 163-8677 Japan
AU: Ramirez, L
EM: lramirez@andrew.cmu.edu
AF: Carnegie Mellon University Civil and Environmental Engineering, 5000 Forbes Avenue, Pittsburgh, PA 15213
AB: In this study, we investigate the spatial variation of the ground motion in the Sherman Oaks region during the 1994 Northridge earthquake, through several broadband ground motion simulations obtained with a hybrid methodology. The methodology involves a deterministic 3D finite element method for computing the low frequency motions and a stochastic methodology by Kamae et al. (1996) for the higher frequencies. As a major modification to existing ground motion simulation methods, in a small urban region that experienced widespread damage during a strong earthquake, we focus on determining a more realistic site response. Employing a frequency-dependent radiation pattern and site dependent amplification factors, we improve the spatial and temporal resolution of currently available simulated ground motions. Several box-shaped grid structures are formed in the Sherman Oaks region, within which the spatial variation of the ground motion near the surface is examined. The simulated results are presented in terms of synthetic seismograms and response spectra and are compared with observations.
DE: 7212 Earthquake ground motions and engineering seismology
DE: 7223 Earthquake interaction, forecasting, and prediction (1217, 1242)
DE: 7290 Computational seismology
DE: 7299 General or miscellaneous
SC: Seismology [S]
MN: Fall Meeting 2005