چكيده به لاتين
Today, the design and construction of tall buildings has had significant development due to the expansion of population in large cities, the shortage of land and the increase of the price, especially in central and important areas of cities. Although high-rise buildings have a variety of functions, one of the most widely practical and cost-effective functions is to be used as office-commercial buildings. In this building, due to the special requirements of structural stability and functional architecture, the issue of structural strength and aesthetic as well as functional issues of the form have become closer to each other. Despite many solutions to achieve the desired architecture in addition to structural stability in the building, it seems that the study of the building form as an effective factor in the plan and section can be an optimal answer respectively. While the shape of the building geometry, both in plan and height, affects the structural performance, the form of the building is very important in terms of aesthetic aspects and the function of the building in architecture. so, if the form of the building can be designed in such a way that not only responds to the architectural features of the building, but also it can perform better in terms of structure (seismic behavior), it will be possible to achieve these two goals simultaneously. Still, less attention has been given to the geometry and plan capabilities of the building for seismic stability. Therefore, in this study, in addition to considering architectural constraints such as the area of the central core and floors, building height, free plan and appropriate light depth in the floors, it has been tried to make changes in the body shape of the building in height and plan to compare its seismic behavior through creating appropriate forms which can meet the architectural and structural needs of a building as well as making the design economical. Therefore, in this study, the optimization of form and structure through the hexagrid system is specifically discussed. The research is quantitative and the modeling of forms has been done by the Rhino software through the analysis of structural models in the SEP 2000 software. Based on the obtained results, it can be stated that the more the number of sides of the plan (circle) increases, the lower the total weight of the building can be reduced by reducing the amount of concavity and convexity. However, as the angles of the plan decreases (triangular), the amount of total weight can be reduced by increasing the amount of concavity and convexity. In addition, by decreasing the angles of the plan in convex sections, the amount of base cut is reduced by 10%, while this amount in concave sections did not differ significantly with increasing or decreasing the number of angles of the plan which shows a constant trend in almost all models.
