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.
注記: Soft story checks
and plan irregularities are applicable to structures with rigid floor diaphragm
definitions. Refer to
M. To assign nodes to a floor
diaphragm.
The CHECK SOFT STORY
option may added to a FLOOR DIAPHRAGM command set to check for soft
stories per either IS 1893 2002, IS 1893 2016, or ASCE 7-05 codes. The CHECK
IRREGULARITIES command may be added to check plan irregularities for the IS
1893 2016 or ASCE 7-05/10/16 codes.
ヒント: You can check plan and vertical
irregularities and structure stiffness per EC8 using the Earthquake
workflow.
- 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.
2016年版IS 1893については、表5に従って水平方向の不規則性（ねじりおよび凹角コーナー）をチェックし、表6に従って垂直方向の不規則性（質量の不規則性および不規則モードの振動）をチェックすることができます。
ASCE 7-05／10／16については、水平方向の不規則性（ねじりおよび凹角コーナー）と垂直方向の不規則性（質量）をチェックすることができます。このコードでは、不規則モードの振動は考慮されません。
- (オプション) 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.
