Investigating the functional efficiency in the architecture of houses in the First Pahlavi period of Iran based on syntactic indicators of space in fuzzy logic; case study: Shiraz City

The concept of functional efficiency of space in the architecture of residential houses means minimizing the influence of unrelated activities on each other and also the spatial organization of related activities; so that their proper productivity depends on optimal service to each other. Accordingly, this study seeks to investigate the degree of functional efficiency in the architecture of houses in the first Pahlavi period of Iran based on the syntactic indicators of space in fuzzy logic and the city of Shiraz has been selected as a case study. Since in this research, the independent variables are qualitative and syntactic indicators of space in fuzzy logic and the dependent variable is the functional efficiency; the research strategy is a combination of survey types. Therefore, the set of information extracted from the syntactic method or spatial arrangement as a score obtained from syntactic relations and information extracted from qualitative concepts derived from historical and library sources and documents and their appearance in syntactic indicators are evaluated. Then, using MATLAB software and the sum of the obtained numbers for each house in a syntactic-content approach, the concept of functional efficiency of spatial configuration can be analyzed and measured. The results show that Afsharian house (type A. courtyard + four-sided), Sedaghati house (type B. yard + three-sided), Mustaghni house (type C. yard + double-sided L-shaped), Razmjoo house (type D. courtyard + bilateral reciprocal) and Zakeri house (type E. courtyard + one-sided), respectively, have higher functional efficiency and, consequently, in the "space circulation" system introduced with "accessibility", has greater accessibility and more flexibility; in the "space zoning" system introduced with "permeability" has a lower relative depth average and higher permeability; and in the "functional space" system introduced with "flexibility" have more interconnection and less relative rank, more integration and less separation.