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Section 5
5-189
where,
f
1
= seismic zone coefficient (0.2, 0.3 etc.). Instead of using an
integer value like 1, 2, 3 or 4, use the fractional value like
0.075, 0.15, 0.2, 0.3, 0.4, etc.
f
2
= importance factor
f
3
= numerical co-efficient R
w
for lateral load in X-direction
f
4
= numerical co-efficient R
w
for lateral load in Z-directions
f
5
= site co-efficient for soil characteristics
f
6
= horizontal force factor
f
7
= importance factor
f
8
= site characteristic period (Referred to as Ts in the UBC
code). Default value is 0.5.
f
9
= Value of the term C
t
which appears in the equation of the
period of the structure per Method A. It’s default value is
0.035. See note 7 in section 5.31.2.1.
f
10
= Period of structure (in seconds) in the X- direction.
f
11
= Period of structure (in seconds) in the Z direction (or Y if
SET Z UP is used).
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.
Floor Weight is used if the pressure is on a region bounded by
beams, but the entity which constitutes the region, such as a slab,