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Symbols
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 as determined in accordance with Section 11.4.2,
S1 = the mapped MCER spectral response acceleration parameter at a period of 1 s as determined in accordance with Section 11.4.2
SD1 = Design spectral response acceleration parameter for a period of 1.0 seconds
SDS = Design earthquake spectral response acceleration parameters at short periods
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The map spectral response acceleration parameters SS and S1 are turned into the design spectral response acceleration parameters SMS and SM1 with eqEq. 11.4-1 and 11.4-2.
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Wherein Fa and Fv defined below shows the local site coefficients.
Design earthquake spectral response acceleration parameters at short periods, SDS, and at 1-s periods, SD1, are determined from Eqs. Eq. 11.4-3 and 11.4-4.
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