Evaluation of types of layout of urban green spaces to reduce the effects of explosion on buildings

The most important step in planning and designing the urban green space is the sustainable development and improvement of the productivity of the city's green spaces. It is for this purpose that nowadays urban green spaces are designed with multiple functions. In this regard, one of the neglected functions of urban green spaces is the defensive uses of plants in the form of protecting key city buildings and even public spaces against accidental and intentional explosions, including terrorist attacks. In this research, first, by using library studies, materials related to this field were collected, and in order to obtain a survey from the community of experts, consisting of 26 people, a questionnaire for weighting the effective indicators and also giving points to each of Options are provided. In the following, using the SWARA method, the opinion of the experts was analyzed and the importance and weight of each of the influential indicators was obtained, and finally, the types of tree arrangement were examined using the COPRAS method. The results show that the best arrangement of trees to reduce the effects of explosions on buildings is a dense arrangement, followed by the topographical arrangement of the area. Vertical and linear layouts are known as the worst layouts for reducing blast effects on buildings.