Technical Notes: Influence of Site and Soil Characteristics on Uniform Hazard Spectra of Andimeshk Site

Evaluating strong ground motion propagation in soil is one of the issues in geotechnical engineering which has caused heated debate among engineers and it is utilized for computing ground surface motions. This paper, presents analyses to acquire hazard curves and uniform hazard spectra for Andimeshk site considering the influences of the site and soil characteristics. Several recorded accelerograms of the past earthquakes at the abovementioned site and adjacent zone (radius of 200Km) are used to determine the region-specific source parameters. Seismic hazard curves are first acquired by using the Crisis software based on the records of Andimeshk catalog and then uniform hazard spectra obtain considering site effects by modeling the soil profile of Andimeshk and performing the nonlinear analysis in time domain by DeepSoil software. The results are compared to Iranian Seismic Code and significant differences are shown. Moreover, this paper provides further suggestions for using new spectrum (2/3 of 2% in 50 years) for engineering design purposes.