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<br />Design response spectra were calculated for the peak ground accelera- <br />tion at 0.355 g using the methods of Newmark and Hall (1982). <br />Ground motion pazameters (velocity and displacement) can be scaled <br />to any peak ground acceleration on the reasonable assumption that <br />acceleration, velocity, and displacement aze proportional to each other <br />regardless of the level of ground shaking. Amplification factors for <br />given levels of cumulative probability (50% and 84.1%), determined <br />statistically by Newmark and Hall (1982), are applied to peak ground <br />motion parameters to obtain the design spectra at the desired percent- <br />age of critical damping. The peak earthquake ground motion response <br />spectrum based on an acceleration of 0.355 g derived from the PSHA <br />and response spectra for 5%, 7%, and 10% of critical damping at the <br />50th and 84th percentiles are illustrated on Figures 9, 10 and 11, <br />respectively. <br />36 <br />