تدوین مدل نظری مولفه‌های موثر بر سرزندگی اجتماعی خیابان‌ (مورد مطالعه: خیابان تاریخی سپه، اصفهان)

In livable city streets, the physical and social components should work together to enhance the health and development of the urban community and every individual member of the society. These streets are known as the heart of urban social life, and also as a place for providing social needs of citizens. Due to the essence of modern lifestyle and allocation of larger part of people's time to outdoor activities, it seems necessary to provide social needs in urban spaces, especially streets. In this regard, the present study aims to compilation a theoretical model of social vitality in streets. The research question is that the theoretical model of street's social vitality, includes what components and variables. The research method is confirmatory factor analysis type of correlation methodology. This method is used to confirm the coordination between data with a certain factor structure (theoretical research model). The study of the Sepah St., located in the historic center of Isfahan, with a good level of social vitality, has been done to confirm the research factor model. The field method (questionnaire) is used for collecting data and confirmatory factor analysis in the Amos Graphic software is utilized to test the research factor model. The result indicates that compiled factor model has fit well with data and there is a meaningful relationship between the design elements shaping the quality of social vitality and the related variables on Sepah Street. Based on findings, the quality of social vitality consists of three components of urban design: experimental-aesthetic component, functional component and environmental component. Experimental-aesthetic components include variables of street transparent wall, community control, lighting, context congruency, flooring and furniture. Environmental components consist of variables of smell of the environment, seating position, desirable shading, Cleanliness of the environment, noise pollution and public green spaces, and variables of functional component comprising of access to public transportation, access to the parking lot and mix using