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STAAD Commands and Input Instructions
Section 5
5-318
modelled using plate elements, something which this facility
cannot at present.
3. The x
1
, y
1
, z
1
values of the starting position of the reference wheel
must be provided bearing in mind that the reference wheel has to
be at the elevation of the deck. An improper set of values of these
parameters may result in the wheels being positioned incorrectly,
and consequently, no load may be generated at all.
Example
LOAD 1 DL ONLY
SELFWEIGHT
LOAD GENERATION 20 ADD LOAD 1
TYPE 1 0. 5. 10. XI 10.
TYPE 2 0. 10. 10. ZI 15.
LOAD 22 LIVE LOAD ON PAVEMENT
MEMB LOAD
10 TO 20 30 TO 40 UNI GY -5.0
LOAD COMBINATION 31 10 0.75 22 0.75
PERFORM ANALYSIS
Generation of Seismic Loads per UBC, IBC and other
codes
Built-in algorithms will automatically distribute the base shear
among appropriate levels and the roof per the relevant code
specifications. The following general format should be used to
generate loads in a particular direction.
General Format:
LOA
D i
⎧X ⎫
UBC
LOAD ⎨Y ⎬ (f1) (ACC f2)
⎩
Z
⎭
Where UBC may be replaced by: IBC , 1893 , AIJ , COL, CFE,
NTC or RPA
See Sections
1.17.2 and
5.31.2