Seismic geotechnic and dynamic soil behavior analysis of Bahabad city, South East Yazd

Bahabad city is located in south Yazd province of Iran, about 200 Km far from east yazd city. In this study, seismic microzonation of the city is done based on the area seismicity with specific return period, and by using obtained data of the 5 boreholes to determinate dynamic soil behavior and ground response against earthquake. To analyze site effect precisely, we used EERA program and provided microzonation maps by Kriging method and using ArcGIS software. The study showed that the city center has a higher amplification factor than the other parts. The area classified to two ground type: IIb (hard soil with thickness more than 30 m) and IIIb (moderate dense soil) based on standard 2800 of Iran. Maximum acceleration and amplification factor of the surface are higher and decrease to go around. The center of the city has hard soil with thickness more than 30 m (IIb) and therefore, maximum spectral acceleration. This trend decreases into the around.