Site Response Investigation

Earthquake ground motion is significantly influenced by geological materials. As waves propagate toward the surface, they undergo changes due to several factors that modify the frequency and amplitude of seismic phases. For site specific projects, the susceptibility of geological materials beneath structures to amplification of motions needs to be evaluated. We provide the following services for this purpose:

  • Calculation of shear-wave velocity and the elastic properties of soil column from geophysical surveys such as refraction seismic technique or multi-channel analysis of surface waves
  • Estimation of site fundamental frequency and amplification curves at different frequencies
  • Model of shear-wave velocity in the top 30 meters and site class estimation according to the National Earthquake Hazards Reduction Program
  • Evaluation of the amplification of input ground motion to site models