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.
Note: 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.
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. Tip: You can check plan and vertical
irregularities and structure stiffness per EC8 using the Earthquake
workflow.
Note: Additionally, the
story stiffnesses used in calculating story drift or checking soft stories can
be added to
STAAD.Pro output by including the command
PRINT STORY STIFFNESS
in the post analysis print
commands section.