Procedures for Selecting Earthquake Ground Motions at Rock Sites.
Procedures for Selecting Earthquake Ground Motions at
Idriss, I. M.
NIST GCR 93-625; 35 p. April 1993.
Sponsor:National Institute of Standards and Technology,
Available from: National Technical Information Service
Order number: PB93-185973
earthquakes; acceleration response spectrum; attenuation
relationships; earthquake ground motions
To estimate the spectral ordinates at a rock site for an
earthquake having a given size (magnitude) and occurring
at a specified distance from the site, available
attenuation relationships are used. These
relationships, which have been developed based on
available recorded data and typically are for a spectral
damping of 5%, provide estimates of the median spectral
ordinates and a measure of the dispersion about the
median. Four currently available relationships are
summarized in this report. These relationships are
those derived by Campbell (1990), Geomatrix (1991),
Idriss (1991) and Joyner and Boore (1988). The
equations to be used in conjunction with each
relationship together with the description and the
numerical values of the coefficients pertinent to that
relationship are given.