نوع مقاله : علمی - پژوهشی
1 گروه مهندسی عمران، دانشکده فنی و مهندسی دانشگاه آزاد اسلامی واحد تهران غرب
2 کارشناس ارشد مهندسی عمران گرایش زلزله، دانشکده فنى ومهندسى، گروه مهندسى عمران، دانشگاه آزاد اسلامى واحد تهران غرب، تهران، ایران
3 استادیار سازه، گروه عمران، دانشکده فنی و مهندسی، دانشگاه صنعتی قم، قم، ایران
عنوان مقاله [English]
The large-scale stadium structures as part of the urban elements with social and recreational functions can play a dual role in the seismic risk management of seismic-prone countries. Because of the possibility of human density and unsafely of the crowd during earthquake events, evaluating the seismic performance of these buildings both in terms of minimizing high human losses and ensuring financial investments could help to prevent and mitigate risks, significantly. For this purpose, the grandstand structure of a roofless sports stadium with concrete moment frame lateral system is designed according to the current seismic codes. Then, the seismic performance of the structure is assessed under two different crowd scenarios by applying nonlinear time-history incremental dynamic analysis method under bidirectional excitation of a set of site-compatible earthquake records. According to the results, the median IM capacity of the structure is decreased from 20% to 50% in the full crowded scenario compared to the empty scenario, over the various limit-states. The expected functional objectives of the current seismic codes are satisfied for the scenario of empty structure and it can be considered as backup emergency facilities for the first 72 hours after earthquake events with any intensity levels. However, by considering the most pessimistic scenario when the earthquake coincides with the stadium being full, the application of the seismic risk reduction strategies seems to be essential to the decision-making process to ensure the desired performance level during the earthquake events with return periods more than 475 years for emergency evacuation or emergency temporary accommodation.