Name
|
Type a unique name to identify the time history
load definition.
|
Save
|
Select this option to create an external file (input
file name with a .tmh extension ) containing the history of the displacements
of every node of the structure at every time step. |
Curve Type
|
Select the type of time history curve to
use:
-
Ground Motion (i.e., Acceleration)
indicates that the time varying load type is a ground motion.
-
Force indicates that it is a
forcing function.
-
Moment indicates that it is a
moment forcing function.
|
Data point source
|
Select the method of input for the time history values:
- Custom – specify explicit data pairs
for the selected Curve Type for specific times.
- External – specify explicit data pairs
for the selected Curve Type for specific times using an
external file.
- Polynomial - Uses a second-order
polynomial (quadratic polynomial) to describe the time curve.
- Damped Harmonic – You will specify the factors in a generalized damped harmonic function.
- Harmonic – specify a harmonic function
parametrically
Tip: When entering
parameters for polynomial or damped harmonic functions, any of the coefficients
may be left as zero. However, time interval and finish time must be specified.
|