A Reevaluation of Seismic Hazard Zoning Maps for Iran

摘要

The studies on seismic hazard analysis and zoning in Iran comprises the classical analysis of seismic sources using the seismotectonic and seismicity information. These analysis is performed during the last 3 decades based on the deterministic and probabilistic approaches. A logic tree was used to take into account the different ways for determination of the seismic source zones in Iran, and incorporating the seismicity models and empirical attenuations models that are developed based on the Iranian strong motion data. In addition to the usual maps referring to different types of soil conditions (rock, stiff, and soft soil), the soil hazard map for the Tbilisi broader area has been computed by aggregating the results according to the specific characteristics of the site conditions. The maximum accelerations between 0.2 and 0,55g is expected for a return period of 475 years for different parts of Iran. These new results shows the importance of the incorporations of new attenuation models, as well as the new concepts of the determination of seismic source zones for Iranian plateau.