Environmental Management Hazards 2423-415X 4 1 2017 03 21 Investigation of the Impact of High-rise Buildings Shapes on their Structural Stability in order to Reduce Seismic Hazards (Case Study: The Effect of Shape of Plan) Investigation of the Impact of High-rise Buildings Shapes on their Structural Stability in order to Reduce Seismic Hazards (Case Study: The Effect of Shape of Plan) 27 42 62735 10.22059/jhsci.2017.62735 FA Amirreza Ardekani PhD Candidate, College of Architecture, Faculty of Fine Arts, University of Tehran, Tehran, Iran Mahmood Golabchi Professor, College of Architecture, Faculty of Fine Arts, University of Tehran, Tehran, Iran Seyyed Mahmood Hosseini Professor, International Institute of Earthquake Engineering and Seismology, Tehran, Iran Matin Alaghmandan Assistant Professor, Architecture and Urban Planning Faculty, Shahid Beheshti University, Tehran, Iran Journal Article 2017 06 28 Prevention from hazard is always a better option than its management and treatment. Our country, due to its geographical and natural position, is among 10 countries exposing to natural disasters. Earthquake, as the most considerable hazard, has caused significant damages yet due to existing several active faults in Iran. Hence, predicting earthquakes, and considering preparations to mitigate the vulnerability of building structures, is a top priority for designers, builders and regulators. Particularly, high-rise buildings are very important to reduce such vulnerabilities because of their high occupation area, population, effects on the environment, and special structural characteristics. In this paper, we enumerate various architectural and structural parameters that affect the optimization and stability of tall buildings against loads. We then investigate the effect of architectural form on increasing structural efficiency and stability against seismic loads. The research is quantitative, and applies modeling and simulation techniques. To assess the effect of parameters accurately, reliable architectural (Rhinoceros) and structural (SAP2000) software were used. Although, based on the results, the effect of the number of plan sides is less clear in some parameters such as inter-story drift, and maximum displacement, it reveals more obvious differences, and explicit relation between the number of sides and material weight in structural fundamental period, and structural weight per unit area. Generally, structural plans containing more sides model optimized forms due to have less weight, and present less stiffened, and more flexible behavior. Prevention from hazard is always a better option than its management and treatment. Our country, due to its geographical and natural position, is among 10 countries exposing to natural disasters. Earthquake, as the most considerable hazard, has caused significant damages yet due to existing several active faults in Iran. Hence, predicting earthquakes, and considering preparations to mitigate the vulnerability of building structures, is a top priority for designers, builders and regulators. Particularly, high-rise buildings are very important to reduce such vulnerabilities because of their high occupation area, population, effects on the environment, and special structural characteristics. In this paper, we enumerate various architectural and structural parameters that affect the optimization and stability of tall buildings against loads. We then investigate the effect of architectural form on increasing structural efficiency and stability against seismic loads. The research is quantitative, and applies modeling and simulation techniques. To assess the effect of parameters accurately, reliable architectural (Rhinoceros) and structural (SAP2000) software were used. Although, based on the results, the effect of the number of plan sides is less clear in some parameters such as inter-story drift, and maximum displacement, it reveals more obvious differences, and explicit relation between the number of sides and material weight in structural fundamental period, and structural weight per unit area. Generally, structural plans containing more sides model optimized forms due to have less weight, and present less stiffened, and more flexible behavior. https://jhsci.ut.ac.ir/article_62735_791a86ecb24b3cc72e214af874c8bda6.pdf