تحلیل خرابی پیش‌رونده سیستم قاب خمشی فولادی مهار شده با دیوار برشی بتنی

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشگاه خوارزمی تهران

2 دانش آموخته دانشگاه امام حسین (ع)

چکیده

یکی از راهکارهای مطرح در پدافند غیرعامل، محافظت ساختمان­های مهم در برابر خرابی پیشرونده است.  خرابی پیش‌رونده پدیده­ای است که در شرایط خاص به علت حذف برخی از اعضای سازه­ای در یک ساختمان امکان وقوع دارد. در این تحقیق با استفاده روش مسیر بارجایگزین مندرج در ضوابط UFC 4-023-03 به ارزیابی خرابی پیش‌رونده یک ساختمان 26 طبقه مسکونی ساخته‌شده در تهران در برابر چندین سناریوی حذف ستون و دیوار برشی واقع در طبقه همکف پرداخته شده است. تحلیل تاریخچه زمانی غیرخطی توسط نرم‌افزار SAP2000  و بر اساس ضوابط UFC انجام شده است تا توانایی ساختمان برای پل زدن روی اعضای باربر باقی مانده مورد ارزیابی قرار گیرد. مفاصل پلاستیک در تیرها و ستون­ها  در قاب خمشی ویژه طبق دستورالعمل ASCE41-17 و FEMA356 تعریف شدند. دیوارهای برشی تیز به دو روش پوسته چند لایه و روش ستون معادل میانی مدل‌سازی گردید. نتایج به‌دست‌آمده، نشان می‌دهد با آرایش صحیح دیوارهای برشی  سیستم دوگانه در محدوده ضوابط آیین‌نامه‌ای توانایی مناسبی جهت مقابله با خرابی پیش‌رونده به‌دست خواهد آمد.

کلیدواژه‌ها


عنوان مقاله [English]

Progressive Collapse analysis of Dual System “Special Moment Steel Frame with Special Concrete Shear Wall”

نویسندگان [English]

  • S. S. Emamzadeh 1
  • A. Arbab Noush Abadi 2
1 civil engineering, Kharazmi University, Tehran,Iran
2 Imam Hossein University
چکیده [English]

One of the approaches to passive defense is to protect important buildings against progressive collapse. Progressive collapse is a phenomenon that happens in a building due to the removal of some structural members. In this research, the progressive collapse of a 26 story residential building in Tehran was studied by the alternative load path (ALP) method according to UFC 4-023-03. Several independent column and shear wall removal scenarios were adopted from the first floor. Nonlinear dynamic analysis was performed with SAP2000 software according to UFC to evaluate the bridging ability of the building on the remained members. Plastic joints in beams and columns were defined in special moment frames according to the instructions ASCE41-17 and FEMA356. Also, the shear walls were modeled by the multi-layer shells method and the mid column equivalent method. The results showed that correct relocation of the shear walls in a dual system within building guidelines leads to appropriate resistance to progressive collapse.

کلیدواژه‌ها [English]

  • Passive defense
  • Concrete shear wall
  • Progressive collapse
  • Tall buildings
  • Dual system
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