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Section 5
5-309
Multiple Response Spectra
For special conditions more than one spectrum may be needed to
adequately represent the seismic hazard over an area. This happens
when the earthquake affecting the area are generated by sources
varying widely in location and other parameters. In those cases
different values of ALPHA as well as Q may be required to
indicate the different shapes of response spectrum for each type of
earthquake.
adequately represent the seismic hazard over an area. This happens
when the earthquake affecting the area are generated by sources
varying widely in location and other parameters. In those cases
different values of ALPHA as well as Q may be required to
indicate the different shapes of response spectrum for each type of
earthquake.