AERODYNAMIC STUDY OF FLAT ROOFS USING NUMERICAL MODELING

With the development of new materials and technologies, it becomes necessary to create new or modernize existing roofing systems. The interaction of roofing systems with wind currents is an important aspect of design, since increased wind load can exert significant pressure on the roof and cause it to damage or even collapse as a whole or individual elements. The solutions of the roof are TN-UNIVERSAL ROOF without fixing the prefabricated screed into the supporting base and TN-SOLID PROF ROOF without gluing thermal insulation and wedge-shaped XPS plates onto adhesive foam. The study was applied using numerical simulation of wind flows in the Ansys CFX software and computing complex. As a result of the iterative calculation, data on the distribution of wind pressure over the surface of the studied building models were obtained, wind load values were calculated that contribute to the rise of roof layers due to the occurrence of negative wind pressure, the maximum heights of buildings and wind areas for which the coating solutions are acceptable were determined. The maximum speed of wind flows has been revealed, at which the integrity of the TN-UNIVERSAL ROOF and TN-SOLID PROF ROOF structures is maintained in the conditions of building placement on a site belonging to type B terrain. The permissible height of the building has been established in various wind areas when using roofing solutions TN-UNIVERSAL ROOF with the possibility of permissible lifting of a composite screed made of chrysotile cement sheets and TN-SOLID PROF ROOF without gluing XPS plates together on adhesive foam. The research results can be applied in practice in the design of buildings and structures with geometric parameters similar to the model under study.