بررسی رفتار لرزه‌ای اتصال با سخت‌کننده پیرامونی پیشنهادی در قاب‌های خمشی

نوع مقاله : مقاله عمران

نویسندگان

1 عضو هیات دانشگاه سمنان

2 دکتری عمران سازه/دانشگاه سمنان

چکیده

جهت تامین صلبیت اتصال در سیستم قاب خمشی از ورق های پیوستگی در تراز بال های تیر استفاده می شود. در ستون های قوطی شکل به علت بسته بودن مقطع ستون، اجرای این ستون ها دشوار بوده و از قابلیت اعتماد چندانی برخوردار نیست. تحقیق حاضر به معرفی یک اتصال جدید با سخت کننده های خارجی می پردازد. در اتصال پیشنهادی از سخت کننده های خارجی ذوزنقه ای شکل در تراز بال های تیر استفاده شده است تا ضمن انتقال ایمن نیرو از تیر به ستون بتواند ضوابط لرزه ای اتصال را به خوبی برآورده نماید. اتصال مذکور در دو حالت با ستون قوطی شکل خالی و پر شده با بتن بررسی شده و آنالیز حساسیت ضخامت سخت کننده ها انجام شده است. نتایج مطالعات نشان می دهد که اتصال معرفی شده ضوابط لرزه ای اتصال را به خوبی تامین می نماید و با توجه به افزایش عرض بال تیر در نواحی اطراف ستون مفصل پلاستیک را به منطقه امن و کنترل شده ای داخل تیر هدایت می کند.

کلیدواژه‌ها

عنوان مقاله [English]

Seismic behavior of connection with surrounded stiffeners in the proposed moment frames

نویسندگان [English]

  • omid rezaeifar 1
  • Adel Younesi 2
1 Department of Civil Engineering, Semnan University, Semnan
2 Ph.D. Structural Engineering/ Semnan university
چکیده [English]

To ensure the rigidity of the connection in the moment frame system, continuity plates are used at the level of the beam flanges. In box columns, due to the closed section, it is difficult to implement and is not very reliable. The present study introduces a new connection with external stiffeners. In the proposed connection, trapezoidal external stiffeners are used at the level of the beam flanges so that while transferring the force safely from the beam to the column, it can meet the seismic criteria of the connection well. The mentioned connection was investigated in two cases, first; hollow steel section and second column filled with concrete, and the sensitivity analysis of the thickness of the stiffeners were performed. ANSYS software was used to achieve the research objectives. SHELL element is used in modeling steel sections and SOLID element is used for modeling concrete. The parameters studied in the present study to express the adequacy of the connection are: strength, fixed percentage, connection cycle behavior, ductility, energy absorption and stress distribution across the connection. The results of studies show that the introduced connection provides the seismic criteria of the connection well and due to the increase in the width of the beam flange in the areas around the plastic hinge column, it leads to a safe and controlled area inside the beam.

کلیدواژه‌ها [English]

  • Moment frame
  • Continuity plate
  • External stiffener
  • Box column
  • CFT

مراجع

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مدل سازی در مهندسی
دوره 19، شماره 65
تیر 1400
صفحه 193-202

فایل ها

سابقه مقاله

  • تاریخ دریافت: 12 بهمن 1395
  • تاریخ بازنگری: 06 آبان 1399
  • تاریخ پذیرش: 24 دی 1399

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