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STAAD Commands and Input Instructions
Section 5
5-224
where,
f
1
= Zonal velocity ratio per Appendix C
f
2
= Factor for acceleration related seismic zone per Appendix C
f
3
= Factor for velocity related seismic zone per Appendix C
f
4
= Force modification factor along X-direction that reflects
the capability of a structure to dissipate energy through
inelastic behaviour. Please refer Table 4.1.9.1B
f
5
= Force modification factor along Z-direction that reflects the
capability of a structure to dissipate energy through
inelastic behaviour. Please refer Table 4.1.9.1B
f
6
= Seismic importance factor per sentence 10 section 4.1.9.1
f
7
= Foundation factor conforming to Table 4.1.9.1C and
sentence 11 section 4.1.9.1
f
8
= Factor to be used to calculate the fundamental period of
structure .This is an optional parameter.
f
10
= Period of structure (in seconds) in the X- direction. This is
an optional parameter.
f
11
= Period of structure (in seconds) in the Z- direction (or Y if
SET Z UP is used). This is an optional parameter.
w = joint weight associated with list
UNI = specifies a uniformly distributed load with a value of v
1
starting at a distance of v
2
(from the start of the member)
and ending at a distance of v
3
(from the start of the
member). If v
2
and v
3
are omitted, the load is assumed to
cover the entire length of the member.
CON = specifies a concentrated force with a value of v
4
applied
at a distance of v
5
(from the start of the member). If v
5
is
omitted, the load is assumed to act at the center of the
member.
p = weight per unit area for the plates selected. Assumed to be
uniform over the entire plate.
Element Weight is used if plate elements are part of the model, and
uniform pressures on the plates are to be considered in weight
calculation.