A. To check for soft stories and seismic code irregularities
To check for soft stories and other seismic code irregularities in rigid diaphragm structures, use the following procedure.
- On the Analysis and Design ribbon tab, select the tool in the Analysis Data group. The Floor Diaphragm Options dialog opens.
- Select the building code for which you want to perform earthquake checks:
- Check the option Check Soft Story to perform this check.
(IS 1893 - 2016 or ASCE 7 only) To check for plan and other vertical
irregularities, check the option Check Irregularities.
For IS 1893 2016, the program can check horizontal irregularities (torsional and reentrant corners) per Table 5 and vertical irregularities (mass irregularities and irregular modes of oscillation) per Table 6.
For ASCE 7-05/10/16, the program can check horizontal irregularities (torsional and reentrant corners) and vertical irregularies (mass). Irregular modes of oscillation are not considered for this code.
- (Optional) If the base of the structure is not the minimum global Y coordinate defined in the structure, then check the Base Level option and then type the height of the structure base in the adjacent field.
- Click Add.