Lotung Downhole Array: Evaluation of Site Dynamic Properties
A.-W. Elgamal* , Member, ASCE
M. Zeghal* , Associate Member, ASCE
H. T. Tang* ,
J. C. Stepp*
Published in Journal of Geotechnical Engineering. ASCE. Vol. 121. No 4. April 1995
Abstract:
The Lotung Large Scale Seismic Test (LSST) site in Taiwan was
instrumented in 1985 with an array of downhole and surface
accelerometers, by the Electric Power Research Institute (EPRI) and
the Taiwan Power Company (TPC). A total of 18 earthquakes were
recorded during the period 1985-1986. Correlation and spectral
analyses of the recorded downhole accelerations are performed to
evaluate shear wave propagation characteristics, variation of shear
wave velocity with depth, and site resonant frequencies and modal
configurations. A shear-beam model, calibrated by the identified site
properties, is found to represent the site dynamic response
characteristics over a wide frequency range. In a companion paper,
strong-motion earthquake records are utilized to investigate the
Lotung site large-strain soil response characteristics.
For Questions or Comments:
zegham@rpi.edu
elgamal@rpi.edu
