نوع مقاله : پژوهشی
نویسندگان
1 دانشکده مهندسی عمران، دانشگاه صنعتی شریف، پردیس بین الملل کیش
2 دانشکده مهندسی عمران، دانشگاه صنعتی شریف
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
A new structural system of diagonally gridded elements, the so called ``diagrid'', has been introduced in recent years in which the frames that are made up of intersected members surround the main structure. This type of system provides excellent shear rigidity and stiffness, in contrast to the similar tubular structures. The triangular configuration offers structural stability for gravity and lateral loads, and the removal of external columns gives the building a unique architectural beauty. Swiss Re (London), Hearst Tower (New York), Cyclone Tower (Asan, South Korea), Capital Gate Tower (Abu Dhabi) and Jinling Tower (Nanjing, China) are prominent cases with diagrid system worldwide. The response modification factor (R-factor) for diagrid systems is not yet explicitly introduced in the existing building codes and few studies have been conducted on the assessment of this parameter. On the other hand, previous researches show that the angle of diagonals play an important role in the structural behavior. In this paper, the effect of the angle change of diagonal elements on R-factor, collapse capacity and collapse fragility curves of steel diagrid structures are investigated. To this end, 6, 8, 10, and 12 story diagrid buildings with different angles for diagonals varying from
the angle of diagonal members will reduce the uncertainty in collapse data.
کلیدواژهها [English]
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