Document Type : Research Paper
Authors
tarbiat modares university
Abstract
Density with increased population and disregarding social, economic, spatial-physical and environmental effects caused some problems that attracted the attention of urban planners and managements in metropolises such as Tehran. This problem is attention by urban planner and urban management. The proper framework of density (population density, high density, and land use density) at nine areas of 4 district of Tehran municipality seeks in this paper. And effect of density on earthquake vulnerability is study. This is an applied research; and research scrutiny methods are correlation, multivariate regression and fuzzy models. Data collected by documentary and survey methods. Research objectives include identifying density status (population, high, and land use) and discovering the relation between density level (population, high, and land use) and earthquake vulnerability and finally analyzing the effects of increased density (population, high, and land use) on earthquake vulnerability at municipality of Tehran (4 District). Research results show that it is necessary to consider three types of population, land use, and high densities in studying urban density. Moreover, fuzzy approach in urban density data normalization is one of the best approaches in urban vulnarability. In this regard, using fuzzy simple additive weighted method (FSAW) revealed that 7zone (density rank: 6.43), 8zone (density rank: 7.46), and 9zone (density rank: 8) at 4 district of Tehran obtained the lowest density rank; whereas, the highest mean density rank attributed to 6zone (density rank: 1.46) and 5zone (density rank: 2.48), respectively.
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