Generate 
Opens the Seismic Parameter
dialog, which is used to populate the parameter fields with appropriate
values for the IS 1893  2002 code based on a more simplified set of general
parameters. 
Include IS 1893 Part 4

(IS 1893  2002/2005 only) Set this option to
specify loads per IS 1893 (Part 4) 2005 for industrial or stacklike
structures. When set, the a value for ST is required (1
or
5). When set and ST of
5 is used, CV and DV are also required.
Note: If this check
box is clear, then IS 1893 (Part 1) 2002 is used.

Zone 
Seismic zone coefficient. Refer
to Table 2 of IS:1893 (Part 1)2002.

Response reduction Factor (RF) 
Response reduction factor. Refer
Table 7 of IS: 1893 (Part 1) 2002 or Table 3 of IS: 1893 (Part 4) 2005.

Importance factor (I) 
Importance factor depending upon
the functional use of the structures, characterized by hazardous consequences
of its failure, postearthquake functional needs, historical value, or economic
importance. Refer Table 6 of IS: 1893(Part 1)2002 or Table 2 of IS: 1893 (Part
4)2005.

Rock and soil site factor (SS) 
Rock or soil sites factor. Depending on type of
soil, average response acceleration coefficient S_{a}/g is calculated
corresponding to 5% damping. Refer Clause 6.4.5 of IS: 1893 (Part 1) 2002 or
Clause 8.3.2 of IS: 1893 (Part 4) 2005.
 1 = hard soil
 2 = medium soil
 3 = soft soil
Note: Use either
SS orSA to specify
site conditions. If both parameters are specified,
SS is ignored.

Type of structure (ST) 
For IS 1893 Part 1, the program will calculate natural period as per
Clause 7.6 of IS:1893(Part 1)2002.
 1 = RC frame building
 2 = Steel frame building
 3 = All other buildings
For IS1893 Part 4, the program will calculate period as per Clause
14.1 of IS:1893(Part 4)2005 for stacklike structures. For Category 1
Industrial Structures base shear is calculated as twice the base shear of other
structures as per Clause 8.3 of IS:1893(Part 4)2005.
 1 = Category 1
industrial structure (Part 4)
 3 = All other
industrial structures
 5 = stacklike
structures
Note: This
parameter is optional for Part 1, but is required for Part 4.

Damping ratio (DM) 
Damping ratio to obtain
multiplying factor for calculating S_{a}/g for different damping. If no
damping is specified 5% damping (default value 0.05) will be considered
corresponding to which multiplying factor is 1.0. Refer Table 3 of IS:1893(Part
1)2002.
Note: Use either
DM orDF to specify
damping. If both parameters are specified,
DM is ignored.
This should be a value between 0 (zero) and 1.0, inclusive. For example, 7% damping should be specified as 0.07.

*Period in X Direction (PX) 
Optional period of structure (in sec) in X
direction. If this is defined this value will be used to calculate
S_{a}/g for generation of seismic load along X direction.

*Period in Z Direction (PZ) 
Optional period of structure (in sec) in Z direction. If this is defined this value will be used to calculate Sa/g for generation of seismic load along Z direction.

Depth of Foundation (DT) 
Depth of foundation below ground level. It should
be defined in current units. If the depth of foundation is 30 m or more, the
value of A_{h} is taken as half the value obtained. If the foundation
is placed between the ground level and 30 m depth, this value is linearly
interpolated between A_{h} and 0.5A_{h}.
Note: Use either
DT or
GL to specify foundation depth. If both
parameters are specified, DT is ignored.

*Ground level (GL) 
Y coordinate of ground level. A reduced lateral force is applied to
levels below this height, per Clause 6.4.4.

*Spectral acceleration (SA) 
Average response spectral
acceleration coefficient corresponding to site specific spectra.

*Multiplying factor for SA (DF) 
Multiplying factor for
calculating S_{a}/g.

*Coefficient (CS) 
Coefficient as given in Table 6
of IS:1893(Part 4)2005. Valid only for stacklike structures for calculating
fundamental time period per Cl. 14.1.

*Area of crosssection (AX) 
Area of crosssection at the
base of stacklike structures for calculating fundamental time period per Cl.
14.1 of IS:1893(Part 4)2005.

*Modulus of elasticity (ES) 
Modulus of elasticity of
material of stacklike structures for calculating fundamental time period per
Cl. 14.1 of IS:1893(Part 4)2005.

*Coefficient of shear force (CV) 
Coefficient of shear force given
in Table 6 of IS:1893(Part 4)2005. Required for stacklike structures (ST 5).

*Distribution factor (DV) 
Distribution factor for shear
force given in Table 11 of IS:1893(Part 4)2005. Required for stacklike
structures (ST 5).
