TR.31.2.9 IS:1893 - 1984 Code - Lateral SeismicLoad
This feature enables you to generate seismic loads using a static equivalent approach per the IS:1893 - 1984 specifications, Earthquake Resistant Design of Structures.
General Format
DEFINE 1893 ( ACCIDENTAL ) LOAD
ZONE f1 K f2 I f3 B f4 PX f5 PZ f6
weight-data
Refer to Common Weight Data for information on how to specify structure weight for seismic loads.
where:
Parameter | Definition |
---|---|
ZONE f1 | Seismic zone coefficient. |
K f2 | Performance factor. |
I f3 | Importance factor depending upon the functional use of the structures, characterized by hazardous consequences of its failure, post-earthquake functional needs, historical value, or economic importance. |
B f4 | Soil interaction factor. |
PX f5 | Optional period in the X direction. |
PZ f6 | Optional period in the Z direction. |
Note: For additional details on the application of a seismic
load definition used to generate loads, refer to TR.32.12.2 Generation of Seismic Loads.
Example
DEFINE 1893 LOAD
ZONE 0.36 K 2 I B 1
JOINT WEIGHT
39 60 80 WEIGHT 100
LOAD 1 LOADTYPE Seismic TITLE SS_(+X)
1893 LOAD X 1
LOAD 2 LOADTYPE Seismic TITLE SS_(+Z)
1893 LOAD Z 1