The Status QUO Analysis of the Buildings Vulnerability in the City of Oshnavieh to Earthquake

Today, one of the most important dangers that always threatens cities is the risk of earthquakes. The aim of this study was to analyze the vulnerability of buildings in Oshnavieyeh city to possible earthquakes.

The present research is an applied type with a quantitative-analytical approach that has been done in 2021 in the Oshnavieyeh. This study assessed the situation of the neighborhoods of Oshnavieyeh in terms of vulnerability Based on 8 indicators, physical-environmental, including: type of materials, building life, building quality, number of floors, population density, land use, slope, and river area. Also, the AHP-VIKOR integrated model was used to measure vulnerability, Intermediate degree of damage index method, GIS and Idrisi software.

The vulnerability of buildings in the city of Oshnaviyeh is serious. The seismicity of the neighborhoods was different. Neighborhoods 1, 4, 5 and 7 have the most damage against earthquakes. Neighborhoods 2, 3 and parts of neighborhoods 6, 11 and 12 have the least damage.

Reasons for damage in these neighborhoods can be considered the use of low and unsustainable materials such as bricks, clay and wood, long life of buildings (76% of the city level), high population density in neighborhoods 4, 5, 7, high slope and the existence of faults were the way to go in this city. Also the buildings were built without the slightest attention to building regulations.