TR.31.2.9 IS:1893 - 1984 Code - Lateral Seismic Load

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	Description
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