Evaluation of the flexibility of open spaces in urban neighborhoods in terms of passive defense (Case study: District 1 in Tabriz

Open spaces located in the central cities of the cities can be the most unprogrammable spaces from the standpoint of non-operational defense, because these spaces can play a role in critical situations because of their private ownership and belonging to the general public or public bodies. It's very important to reduce the vulnerability Accordingly, the present study aims to investigate and identify the limitations and ability of open spaces in Tabriz 1 in terms of mass and space combination, functional variation for critical situations as well as global coverage and appropriate access to spaces suitable for non-defense purposes. Agent works. For this purpose, in this research, various software applications such as ARC GIS 10 and Auto cad and Excel software have been used for zoning different vulnerabilities and analyzing data. The results of the research indicate that most of the old neighborhoods of Tabriz 1 have been vulnerable to non-operating defenses, as well as the structure of open spaces in the studied area based on the composition of mass and space, more than 11.7of the region's surface area for situations An inappropriate crisis indicates that there is a meaningful relationship between the degree of flexibility of open spaces and their vulnerability, in the sense that the greater the flexibility of open spaces is greater, as much as reducing the vulnerability of the area and In return, finally, surveys show that 58 of Tabriz 1 has an appropriate access to open spaces. There could be improvements in terms of civil defense.