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STAAD Commands and Input Instructions
Section 5
5-316
5.32.12 Generation of Loads
Purpose
This command is used to generate Moving Loads, UBC Seismic
loads and Wind Loads using previously specified load definitions.
Primary load cases may be generated using previously defined load
systems. The following sections describe generation of moving
loads, UBC seismic loads and Wind Loads.
Generation of Moving Loads
Pre-defined moving load system types may be used to generate the
desired number of primary load cases, each representing a
particular position of the moving load system on the structure.
This procedure will simulate the movement of a vehicle in a
specified direction on a specified plane on the structure.
See
Sections
1.17 and
5.31.1
General format:
LOA
D GENERATION n (ADD LOAD i)
*
⎧XINC f
1
⎫ ⎧YRA
NGE ⎫
TYP
E j x
1
y
1
z
1
⎨YINC f
2
⎬ ( ⎨ ⎬ r)
⎩
ZINC f
3
⎭
⎩
ZRANGE
⎭
where,
n = total no. of primary load cases to be generated.
i = load case no. for the previously defined load case to be
added to the generated loads.
j = type no. of previously defined load system.
x
1
, y
1
, z
1
= x, y and z coordinates (global) of the initial position of
the reference load.
f
1
, f
2
f
3
= x, y or z (global) increments of position of load system
to be used for generation of subsequent load cases.
Use only XINC & ZINC if Y up; Use only XINC &
YINC if Z up.