ALGORITHMS FOR CALCULATION OF THE RESPONSE SPECTRA OF SDOF SYSTEM WHEN THE EARTHQUAKE VELOCIGRAMS OR SEISMOGRAMS ARE PRESENT

There are cases in practice when the seismological information of ground motion is obtained not in the form of the acceleration records but in the form of velocigrams or seismograms. In such cases there arises a necessity directly to calculate the respon-se spectra by the help of velocigrams or seismograms. Some met-hods of creation the effective algorithms for calculating the SDOF system response spectra are brought in this paper. The di-gital filter calculation methods with the infinite impulse res-ponse (Recursive Digital Filter) are used. The bilinear 'A Lrans-form is used for the digital simulation of the analog rilter