M. To add a seismic load
To add a seismic load to a primary load case, use the following procedure.
注記: You must have at least one seismic load definition in your model before you can add seismic
loads.
-
Either:
On the Loading ribbon tab, select the Load Items tool in the Loading Specifications group
ヒント: This will add the load item to the currently selected load group selected in the program status bar.または
In the Load & Definition dialog, select a primary load case in the Load Cases Details list and then click Add.
- Select the Seismic Loads tab.
- Select the global Direction in which this seismic load acts.
- (オプション) Type the scale Factor to apply to the load.
- (オプション) Check the option to use Multiplying factor for Accidental Torsion Moment and type a Factor. This value is the ratio of the total building width and is taken from the center of mass for each level.
- (オプション) Check the option to use Multiplying factor for Natural Torsion Moment and type a Factor. This torsion -referred to as the natural torsion- accounts for the static eccentricity which is the difference between center of mass and center of rigidity of a rigid floor diaphragm
- Click Add.