To add seismic load parameters per a building code,
use the following procedure.
Static equivalent
seismic loads are applied based on a set of parameters used to define the load.
The parameters vary for each building code.
-
On the
Load & Definition dialog, select
and the click
Add.
The
Add New: Seismic Definitions dialog opens.
-
On the
Seismic Parameters tab, select the building
code from the
Type drop-down list.
- Optional:
Check the
Include Accidental Load option to consider
accidental torsion.
Note: Not applicable for the Canadian NRC 1995 code.
- Optional:
For the Indian IS 1893 - 2002/2005/2016 codes:
-
For the IS 1893 - 2002/2005 codes, check the Include IS 1893 Part
4 option for industrial or stack-like structures.
-
Click Generate to open the IS 1893 Seismic Parameters
dialog, which provides a simpler method for entering the parameters with
additional context for IS 1893 Part 1.
-
Click Generate.
-
Type the seismic parameters in the table as required for the
selected building code.
-
Click
Add.
If you have not provided all the required parameters, a
message opens to alert you of missing items. Once the minimum required
parameters have been provided, the seismic definition is added to the
entry in the
Load & Definition dialog. The
Seismic Parameters tab is removed from the
Add New: Seismic Parameters dialog.
-
Click Close.
You will need to add weight items to
the load definition. You can do this through a series of loads, a reference load case, or a
combination of both. For IS 1893 2016 seismic loads on buildings with either
RC structural walls, you will also need to specify the first story wall area data
required to calcualte the natural period of the structure.