Vulnerability Assessment of the City Buildings by Fuzzy AHP Model and use of GIS System

In order to reduce the vulnerability of Tehran, before any planning and decision-making, it is necessary that the earthquake damages based on its different conditions and Status shall be analyzed before its occurrence to obtain a clear vision of probable earth quake happening and its resulting consequences and on the basis of simulating probable earth quake in different intensities, the vulnerability maps is prepared. The current study tries to design earth quake scenarios with different intensities by Fuzzy AHP model and GIS software to present a proper estimation of vulnerability of Tehran municipality district No.3 against earthquake.This study is of applicable type and descriptive – analytical. Applied data is of documentary and field type. The results of the study indicate that the amount of incurred damages to the buildings of district No.3 are are divided into five levels of “very low, low, medium, high and complete destruction; in designed scenarios of is Scenarios designed 6 Mrkaly 53/88,26/77,19/04,0/04,0/25; respectively in 7 Mrkaly 23/28, 21/22, 9/31, 26/42, 19/75; 8 Mrkaly 0/54, 59/33, 20/22, 9/55, 46/97, respectively. The highest level of vulnerability Based on the number of damaged buildings are at municipality districts of 2, 3, 5, 4, 1 and 6 respectively which is due to the use of undurable and weak materials construction works, existence of worn textures and high age of the existing structures, structures located on qanats, the population centralization in old and high density textures and tower construction without performing studies regarding comprehensive plans, and also lack of following the common standards in the country including by law 2800.Keywords: Vulnerability, Buildings, Earthquake, Tehran, GIS, Fuzzy AHP