M. To Modify Seismic Parameters
To specify parameters for lateral seismic loads, use the following steps.
-
Select
.
The Seismic Parameters dialog opens.
-
Either:
Select the appropriate City in the drop-down list (recommended)
or
Type Seismic Coefficient and Seismic Zone values directly.
-
Specify a Response Reduction Factor for the building:
- Click […] adjacent to the Response Reduction Factor field. The Response Reduction Factor dialog opens.
- Select the appropriate row in the Building Frame Systems description list.
- Click OK. The Response Reduction Factor is updated.
- (Optional)
Specify or select additional seismic parameters as necessary:
- Type an Importance Factor value.
- Type a Damping Factor value.
- Select the type of soil on site from the Rock/Soil Factor drop-down list.
- Select the Combination Method from the drop-down list.
- Type the Base Shear Scale Factor value.
- Select if brick infill panels are present in the building structure to determine the Natural Time Period.
- Click OK.