Fa =Short-Period Site Coefficient Fv = Long-Period Site Coefficient for a period of 1.0 seconds SMS =Short-period design spectral response acceleration parameter [dimensionless] SM1 =Design spectral response acceleration parameter for a period of 1.0 seconds [dimensionless] SS = the mapped MCER spectral response acceleration parameter at short periods S1 = the mapped MCER spectral response acceleration parameter at a period of 1 seconds SD1 =Design spectral response acceleration parameter for a period of 1.0 seconds SDS = Design earthquake spectral response acceleration parameters at short periods
Spectral response acceleration parameters, are used to plot the Design Response Spectrum curve. The function of the Design Response Spectrum curve is specified in seismic design codes and spectral response acceleration parameters are used to create this function. In the Design Response Spectrum curve, the spectral accelerations corresponding to 1-s period and corner periods are used to determine these parameters.
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