In PLAXIS it is possible to import an accelerogram (or any time data serie) for a dynamic signal as a plain text file. The plain text file should be using the following format:
If the time steps used by the dynamics analysis do not correspond with the time values of the accelerogram, the multipliers at a given (Dynamic) time will be linearly interpolated from the data in the file, see the related article. If the Dynamic time in the calculation goes beyond the last time value of the accelerogram, the last multiplier value from the accelerogram will be used as constant value for the remainder of the calculation time.
This can be used as a simpler alternative to import accelerogram data from a SMC-file.
Drift correction for dynamic input signal from file
[Tips and Tricks]
Fixed and Compliant base: what input motion is required?
On the use of dynamic boundary conditions
Time step used in dynamic calculation
Ground response analysis