Evaluation and analysis of the vulnerability of Yazd city against earthquakes using hybrid models

Earthquake is a natural phenomenon that neglecting it will result in irreparable damages. The occurrence of severe earthquakes has prompted mankind to think of developing an infrastructure program to reduce the risks and damages caused by it. The purpose of this research is to investigate the damages caused by the earthquake in Yazd using the RADIUS model and the hierarchical analysis process in the GIS environment in the proposed scenarios. Based on this, the factors of the number of building floors, type of soil, type of materials, position relative to the fault, age of the building, slope, population density and road network were used. The factors used as separate layers were checked in ArcGIS 10 software and the information needed by the models was extracted and entered into the models used to achieve the results. The results of the research show that according to the scenario of the Anar fault, 21% of the city will be damaged and zone two is more vulnerable than other areas, based on the scenario of the Mehriz Taft fault, 38% of the city will be damaged, and zone two is more vulnerable than other zones.A lot of research has been done in connection with vulnerability, which in the researches, most of the earthquakes in the city have been investigated with spatial data and based on multi-criteria decision models and with the same earthquake intensity in the whole city, regarding buildings, but In this research, using the RADIUS model, the intensity of the earthquake was calculated in different parts of the city and the amount of damage was estimated in different scenarios, which is not observed in the researches.