Assessment of urban physical vulnerability to earthquakes (Case study: Bojnourd city)

Today, due to the extent of urbanization and high population density, the effects and vulnerability of natural hazards in cities are increasing, the dimensions of these effects in the fields of economic (economic stagnation), social (mental and psychological problems, etc.). .), Physical (damage to infrastructure and the collapse of buildings and the resulting problems) and ... is also severe and widespread. This may work to varying degrees in different neighborhoods and regions depending on physical characteristics. Therefore, in order for a city to fully understand the status of vulnerability in its various regions and neighborhoods, it is necessary to assess its physical vulnerability. Therefore, the present study aims to evaluate the degree of physical vulnerability in Bojnourd. The research method in the present study is descriptive-analytical. At first, by collecting the necessary information and data, a database was formed in the GIS environment, then by extracting and combining new maps, the final analysis was performed. To determine the vulnerability of Bojnourd city, to the index of hazardous centers, granulation of parts, building density, population density, quality of buildings, access to relief centers and public and open lands and selected building parts vulnerable to earthquake Has been specified. Vulnerability map of the city The results show that the areas where the streets are wide enough and in a better condition in terms of access to relief centers and the population density and construction, etc. are low, in terms of vulnerability in They are in a better situation. In other words, these areas are classified according to the vulnerability map into 5 parts, relatively low, low, medium, high and very high vulnerability. Today, due to the extent of urbanization and high population density, the effects and vulnerability of natural hazards in cities are increasing, the dimensions of these effects in the fields of economic (economic stagnation), social (mental and psychological problems, etc.). .), Physical (damage to infrastructure and the collapse of buildings and the resulting problems) and ... is also severe and widespread. This may work to varying degrees in different neighborhoods and regions depending on physical characteristics. Therefore, in order for a city to fully understand the status of vulnerability in its various regions and neighborhoods, it is necessary to assess its physical vulnerability. Therefore, the present study aims to evaluate the degree of physical vulnerability in Bojnourd. The research method in the present study is descriptive-analytical. At first, by collecting the necessary information and data, a database was formed in the GIS environment, then by extracting and combining new maps, the final analysis was performed. To determine the vulnerability of Bojnourd city, to the index of hazardous centers, granulation of parts, building density, population density, quality of buildings, access to relief centers and public and open lands and selected building parts vulnerable to earthquake Has been specified. Vulnerability map of the city The results show that the areas where the streets are wide enough and in a better condition in terms of access to relief centers and the population density and construction, etc. are low, in terms of vulnerability in They are in a better situation. In other words, these areas are classified according to the vulnerability map into 5 parts, relatively low, low, medium, high and very high vulnerability. Today, due to the extent of urbanization and high population density, the effects and vulnerability of natural hazards in cities are increasing, the dimensions of these effects in the fields of economic (economic stagnation), social (mental and psychological problems, etc.). .), Physical (damage to infrastructure and the collapse of buildings and the resulting problems) and ... is also severe and widespread. This may work to varying degrees in different neighborhoods and regions depending on physical characteristics. Therefore, in order for a city to fully understand the status of vulnerability in its various regions and neighborhoods, it is necessary to assess its physical vulnerability. Therefore, the present study aims to evaluate the degree of physical vulnerability in Bojnourd. The research method in the present study is descriptive-analytical. At first, by collecting the necessary information and data, a database was formed in the GIS environment, then by extracting and combining new maps, the final analysis was performed. To determine the vulnerability of Bojnourd city, to the index of hazardous centers, granulation of parts, building density, population density, quality of buildings, access to relief centers and public and open lands and selected building parts vulnerable to earthquake Has been specified. Vulnerability map of the city The results show that the areas where the streets are wide enough and in a better condition in terms of access to relief centers and the population density and construction, etc. are low, in terms of vulnerability in They are in a better situation. In other words, these areas are classified according to the vulnerability map into 5 parts, relatively low, low, medium, high and very high vulnerability.