Free software for earthquake engineering and structural dynamic

(the software may be free downloaded and used at own risk)

RespSpectra is an OCTAVE code, which enables the calculation of the response spectrum of earthquake acceleration time-histories.


To run RespSpectra.m:

  • Run Octave
  • Type RespSpectra and Return
  • Answer the questions

Informations and recommendations

  • Since RespSpectra runs with the Central Difference Algorithmus, the upper frequency corresponds to 1/(time interval * pi).
  • RespSpectra calculates the spectral values for 200 frequencies with an uniform logarithmic distribution. The number of frequencies may be changed by changing the variable nf.