Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Seismic Performance of Super Tall Steel Tubular Frames Buildings with Specific Energy Absorbing Stories
Seismic safety of super tall buildings is of paramount importance, since if they get damaged, their repair is very costly on the one hand, and their service interruption requires a substitute space for the occupants, which is very difficult, if not impossible, on the other. Regarding these facts, in seismic design of super tall buildings the desired performance level (PL) is immediate occupancy (IO), and it is obvious that achieving this PL is not possible with conventional seismic design procedures. On this basis, in this paper, the efficiency of using specific energy absorbing stories (SEASs) in improvement of seismic behavior of a set of super tall steel buildings with 50, 60, 70 and 80 stories, with tubular frames combined with X-bracing, as their lateral load bearing system, has been investigated. To create SEASs in each building, in every other few stories the bracing elements have been substituted by dampers, as the additional energy absorption sources. The optimal number and the locations of SEASs in each case have been obtained by an optimization technique based on combination of crossover and mutation. Numerical results show that by considering SEASs in almost one tenth of the buildings’ stories, an optimal design is achieved in each case, and that the optimal use of the SEASs reduces the maximum drifts more than 50% in all considered buildings, resulting in a remarkably higher PL, comparing to that of the buildings designed based on conventional methods.
Seismic Performance of Super Tall Steel Tubular Frames Buildings with Specific Energy Absorbing Stories
Seismic safety of super tall buildings is of paramount importance, since if they get damaged, their repair is very costly on the one hand, and their service interruption requires a substitute space for the occupants, which is very difficult, if not impossible, on the other. Regarding these facts, in seismic design of super tall buildings the desired performance level (PL) is immediate occupancy (IO), and it is obvious that achieving this PL is not possible with conventional seismic design procedures. On this basis, in this paper, the efficiency of using specific energy absorbing stories (SEASs) in improvement of seismic behavior of a set of super tall steel buildings with 50, 60, 70 and 80 stories, with tubular frames combined with X-bracing, as their lateral load bearing system, has been investigated. To create SEASs in each building, in every other few stories the bracing elements have been substituted by dampers, as the additional energy absorption sources. The optimal number and the locations of SEASs in each case have been obtained by an optimization technique based on combination of crossover and mutation. Numerical results show that by considering SEASs in almost one tenth of the buildings’ stories, an optimal design is achieved in each case, and that the optimal use of the SEASs reduces the maximum drifts more than 50% in all considered buildings, resulting in a remarkably higher PL, comparing to that of the buildings designed based on conventional methods.
Seismic Performance of Super Tall Steel Tubular Frames Buildings with Specific Energy Absorbing Stories
Iran J Sci Technol Trans Civ Eng
Keihani, Keivan (Autor:in) / Taghizadieh, Nasser (Autor:in) / Hosseini, Mahmood (Autor:in)
01.12.2021
12 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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