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بررسی اثر آتش سوزی بر رفتار لرزه ای قاب های ساختمانی فولادی مهاربندی شده

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشگاه آزاد اسلامی، واحد مشهد

2 اداره کل راه و شهرسازی خراسان رضوی

چکیده

ساختمان ها می توانند تحت تاثیر بارهای خاص مانند زلزله، طوفان، حریق یا انفجار قرار گیرند که هر یک می تواند موجب تخریب سازه شوند، اما در بعضی موارد ممکن است سازه در مراحل متوالی تحت اثر این بارها قرار گیرند که آیین نامه های موجود نیز در این خصوص فاقد پیش بینی های لازم می باشند. از آنجا که طی سال های گذشته ساختمان های متعددی دچار حریق‌های کوچک و یا بزرگ شده اند و از سوی دیگر ایران در ناحیه خطر بالای زلزله قرار دارد، لزوم بررسی عملکرد لرزه ای ساختمان پس از تجربه حریق می تواند موضوع مهمی تلقی گردد. در این خصوص مطالعات انجام شده تاکنون بیشتر بر سازه های قاب خمشی تمرکز داشته است، لذا در این مقاله به کمک نرم افزار آباکوس به بررسی عملکرد لرزه ای سیستم سازه ای قاب ساختمانی با مهاربند فلزی، پرداخته شده است. نتایج تحلیل غیرارتجاعی فزاینده نشان داد که مقاومت نهایی و ظرفیت شکل پذیری قاب های مهار شده در اثر آتش‌سوزی بطور قابل ملاحظه ای می تواند کاهش یابد که با افزایش تعداد طبقات نیز تشدید می گردد.

کلیدواژه‌ها

عنوان مقاله [English]

Study of the Seismic Behavior of Steel Braced Frames After Fire

نویسندگان [English]

  • hamid kazemi 1
  • Mohammad Mahdi Rashidian 2
  • Ehsan Fereshtehpour 2

1 Islamic Azad University, Mashhad Branch

2 Administration of Roads and Urban Development, Khorasan Razavi

چکیده [English]

Buildings can be affected by special loads such as earthquakes, storms, fires or explosions, that each one can cause the destruction of the structure. In some cases, the structures may be affected by these loads Simultaneously, but there are not also any regulations in existing codes in this regard. Since many buildings have suffered small or large fires in the recent years in Iran, and on the other hand, Iran is located in a high risk zone of earthquakes, it is needed to control the seismic performance of the building after the fire experience can be considered as an important issue. In this regard, the studies have conducted so far have mostly focused on moment resisting frame structures, so in this paper, using ABAQUS software, the seismic behavior of steel braced frames structural system have been investigated. The results of the pushover analysis show that the ultimate strength and ductility capacity of the steel braced frames after fire can be significantly reduced, which is aggravated by increasing the number of floors.

کلیدواژه‌ها [English]

  • Nonlinear Static Analysis
  • Earthquake after Fire
  • Braced Frame
  • Abaqus Software
مراجع
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| نشریه عمران و پروژه |
دوره 4، شماره 12 - شماره پیاپی 46
اسفند 1401
صفحه 25-35
فایل ها
سابقه مقاله
  • تاریخ دریافت: 15 دی 1401
  • تاریخ بازنگری: 15 اسفند 1401
  • تاریخ پذیرش: 20 فروردین 1402
  • تاریخ اولین انتشار: 20 فروردین 1402
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