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هشتمین کنگره ملی مهندسی عمران
جزئیات رویداد
همایش ، رویداد ، ژورنال
اینستاگرام تی پی بین
حوزه های تحت پوشش رویداد
  • جزئیات بیشتر مقاله
    • تاریخ ارائه: 1392/07/24
    • تاریخ انتشار در تی پی بین: 1392/07/24
    • تعداد بازدید: 628
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     this paper presents a performance-based plastic design (pbpd) methodology for the design of steel concentric braced frames (cbf). the design base shear is obtained based on energy-work balance equation using pre-selected target drift and yield mechanism. in order to achieve the intended yield mechanism and behavior, plastic design is performed to detail the frame members. three low-to-medium rise cbf (3-story, 6-story and 9-story) were designed by the proposed methodology and current seismic codes that include provisions to design ductile concentric braced frames called special concentric braced frames (scbf). results of inelastic dynamic analyses carried out on example frames designed by the pbpd method showed that the frames met all the intended performance objectives in terms of yield mechanisms and target drift levels. on the other hand, when designed by current code as scbf the same structures showed very poor response due to premature brace fractures leading to unacceptably large drifts and instability. finally it should be noted that no iterations were carried out to achieve the performance objectives of cbf in the pbpd method.

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