RR 22.01.00-3.1 Static Seismic Loads per IBC 2018 / ASCE 7-16
Automatically generated equivalent lateral seismic loads per IBC 2018 / ASCE 7-16 are now available in STAAD.Pro.
The load parameters are assigned using the User Interface or can be manually entered in the STAAD editor.
Automatic load combinations using the tables from IBC 2018 can be added using the Auto Load Combination dialog, as well.
Changes from IBC 2015/ASCE 7-10 Code
The changes in seismic provisions of IBC 2018/ASCE 7-16 over the previous
version IBC 2015/ASCE 7-10 are mainly observed in Mapped Spectral Acceleration
parameters outlined in chapter 22. STAAD.Pro uses the spectral
acceleration data in text format available in USGS site https://earthquake.usgs.gov/hazards/designmaps/datasets/.
Note: The mapped spectral response acceleration values for
IBC 2018 are retrieved from dynamic data provided by the USGS when
ZIP code or LAT/LONG
methods are used. An internet connection is required for this. If an internet
connection is not available, then the values should be input using the
SS and S1 parameters.
The other significant change in the seismic provisions are in long-period site coefficient, Fa, and short-period site coefficient, Fv. Table 11.4-1 and 11.4-2 of the code provides the value of Fa and Fv respectively. These values are used for the IBC 2018 implementation in STAAD.Pro.