Use the following procedure to define the seismic hazard per FEMA 356.
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On the
Loading ribbon tab, select the
Pushover tool in the
Define Loading Systems group.
The
Create New Definitions / Load Cases / Load
Items dialog opens with only the Pushover tab displayed.
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Select the Define Spectral Details tab.
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Specify up to four Critical Damping values for the 1st through 4th spectra.
At least one is required, which has a default value of 5.0%.
- Optional:
Select the Site Category
Site Class D is used by default.
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Specify the Mapped Spectral Acceleration At Short Period, Ss, to be used per Table 1-4 of FEMA 356.
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Specify the Mapped Spectral Acceleration At One-Second Period, S1, to be used per Table 1-5 of FEMA 356.
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Click Add.