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Semi-Empirical Analysis of Strong-Motion Peaks in Terms of Seismic Source, Propagation Path and Local Site Conditions.
Kamiyama, M.; O'Rourke, M. J.; Flores-Berrones, R.
National Science Foundation, Washington, DC.; New York State Science and Technology Foundation, Albany., September 9, 1992, 168 p.
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The purpose of the report is to derive a new type of semi-empirical expression for scaling strong-motion peaks in terms of seismic source, propagation path and local site conditions. Peak acceleration, peak velocity and peak displacement are analyzed in a similar fashion because they are interrelated. However emphasis is placed on the peak velocity which is a key ground motion parameter for lifeline earthquake engineering studies. With the help of seismic source theories, the semi-empirical model is derived using strong motions obtained in Japan. In the derivation, statistical considerations are used in the selection of the model itself and the model parameters. Earthquake magnitude M and hypocentral distance r are selected as independent variables and the dummy variables are introduced to identify the amplification factor due to individual local site conditions. The resulting semi-empirical expressions for the peak acceleration, velocity and displacement are then compared with strong-motion data observed during three earthquakes in the U.S. and Mexico.
; Mexico; Ground motion; Regression analysis; Velocity measurement; Earthquake engineering; Sites; Soil pressure; Earthquakes; Comparison; Strains; Magnitude; Displacement; Wave propagation; Mathematical models; Seismology; Accelerometers; United States; Seismic waves