Seismic Loads tab
Used to apply previously defined UBC loads on the structure.
Note: If a seismic load definition has not yet been added to the model, a warning message is displayed in the dialog and the controls are inactive. Refer to the Seismic Parameters dialog to learn more about defining a seismic load.
|Direction group||Specify the global direction in which the seismic load is to be generated by selecting the X Direction, Y Direction, or Z Direction radio button.
|Multiplying factor for Accidental Torsion Moment||Set this option to include the accidental torsion load per the UBC, IBC, 1893, etc. code. Type the Factor in the associated field (may be a negative value).|
|Multiplying factor for Natural Torsion Moment||Set this option to include the torsion arising due to static eccentricity which is the difference between center of mass and center of rigidity of a rigid floor diaphragm. Type the Factor in the associated field (must be greater than or equal to zero).|