Analysis the Process of the Sub-Cores Formation in the Spatial Structure with Emphasis on the Residence and Activity Pattern (case study: Kermanshah metropolis)

In the last few years, various concepts of urban-regional spatial structure have been developed and the spatial structure of big cities has exhibited multi-core characteristics. The phenomenon of polycentric is inherent in metropolises, and studies indicate more efficiency and the effect of quantitative methods in identifying functional nuclei. The time frame of this research was cross-sectional and sample data of Kermanshah metropolis, statistical block and land use of the existing situation and comprehensive plan zoning. The variables of this research included 8 major urban uses. Spatial analysis and measurement of the density of mixed uses in Kermanshah metropolis has shown the existence of new sub-centers in regions 1, 3 and 4. In addition to the historical and old core of the city, there are two dense cores of mixed activities in areas 3, 1 and 4 between areas 5 and 8. Of course, the types of services provided in the sub-centric of the metropolis have a regional scale compared to the central core of the city and have been created to meet some of the daily needs of citizens at this level of access. The spatial distribution of commercial and administrative activities shows the concentration of most of these activities in the central core of the city; However, sub-centric in areas 5 and 8 can also be considered as a core in the southeast. The development pattern of residential activity has differences with other activities and that is the formation of several cores other than area 1 as a physical core; In other words, other residential cores have been formed as competitors in areas 6, 5, 4 and 2, which can play an effective role in the formation of other sub-cores.