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Section 5
5-215
General Format
DEFINE NTC LOAD
ZONE f1 ntc-spec
SELFWEIGHT
JOINT WEIGHT
Joint-list
WEIGHT w
[See Section 5.31.2.2 for complete weight input definition]
ntc-spec = ⎧ QX f2 ⎫
⎥
QZ f3 ⎪
⎥
GROUP f4 ⎥
⎥ (
SHADOWED)⎥
⎨ (
REGULAR) ⎬
⎥ (
REDUCE) ⎥
⎥ (
PX f6) ⎥
⎩ (
PZ f7) ⎭
where,
f1 = Zone number specified in number such as 1, 2, 3 or 4
f2 = seismic behavior factor of the structure along X direction as a
parameter according 3.2.4.
f3 = seismic behavior factor of the structure along Z direction as a
parameter according 3.2.4.
f4 = Group of structure entered as A or B
REGULAR optional parameter is entered to consider the structure as a
regular structure. By default, all structures are considered as
irregular.
SHADOWED optional parameter is used to define the shaded zone II as
the site of the structure. By default regular zone II is used.
REDUCE optional parameter allows to reduce the seismic factors as
described above. Otherwise the following formula is used to
calculate base shear,
∑
=
=
N
n
n
W
Q
c
V
1
'