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STAAD Commands and Input Instructions
Section 5
5-238
5.31.4 Definition of Time History Load
Purpose
This set of commands may be used to define parameters for Time
History loading on the structure.
General format:
DEFINE TIME HISTORY (DT x)
ACCELERATION
TYPE i (SCALE f
7
) (SAVE)
FORCE or MOMENT
READ f ( f )
n 8
- OR -
t
1
p
1
t
2
p
2
.... t
n
p
n
- OR -
function-spec
where function-spec =
SINE
FUNCTION
COSINE
FREQUENCY SUBDIV f
6
AMPLITUDE f
0
f
2
(PHASE f
3
) CYCLES f
4
STEP f
5
RPM
Repeat TYPE and Amplitude vs Time sets until all are entered, then:
ARRIVAL TIME
See Sections
1.18.3 and
5.32.10.2
a
1
a
2
a
3
....... a
n
DAMPING d
CDAMP
MDAMP