A Comparative Study on Seismic Response Analysis of Soils Using Different Numerical Codes

The aim of this paper is to compare the results of numerical local seismic response analysis (LSR), performed by two different non linear 1-D codes, Onda (Lo Presti et al., 2006) and Deepsoil (Hashash et al., 2017). Numerical analyses of seismic response have been carried out on a site in the city of Messina (Italy), where it is located an important highway bridge (Ritiro bridge), which recently has been interested by several safety works. For this site the geotechnical characterization is available, with in situ and laboratory tests that show the presence of sandy soils. Local seismic response analyses have been carried out using some synthetic seismograms of the Messina and Reggio Calabria 1908 earthquake (Amoruso et al., 2002). Results of the numerical analyses are presented as comparisons in terms of maximum acceleration profiles, maximum shear strain profiles, response spectra, surface response seismograms, Fourier spectra and amplification ratios.