ارزیابی عملکرد لرزه‌ای قاب پین فیوز با بهره‌گیری از فیوزهای

نوع مقاله : مقاله پژوهشی

نویسندگان

• محسن گرامی
• وحید اسکندریان

دانشکده مهندسی عمران - دانشگاه سمنان-سمنان- ایران

10.22067/jfcei.2022.73405.1074

چکیده

پین فیوز نوع جدیدی از فیوز سازه‌ای است که در محل تشکیل مفصل پلاستیک سازه فولادی، نصب می‌شود. فیوز مزبور در هنگام وقوع زلزله، از طریق لغزش دورانی سطوح فولادی نسبت به یکدیگر عمل نموده، وجود نیروی اصطکاک بین صفحات فیوز، موجب اتلاف انرژی زلزله می‌شود. قاب مهاربندی‌شده پین فیوز، یک قاب خمشی مهاربندی‌شده ویژه بوده که اتصال خمشی آن از نوع پین فیوز بوده و مهاربند قطری آن دارای فیوز اصطکاکی است که مانع کمانش مهاربند می‌شود. در این تحقیق، ابتدا در قیاس بامطالعه آزمایشگاهی قاب مهاربندی‌شده پین فیوز، صحت سنجی انجام شد. در ادامه بر مبنای صحت سنجی صورت گرفته، قاب فولادی مهاربندی‌شده پین فیوز (قاب 9 طبقه - 5 دهانه) طراحی شد. همچنین قاب مشابهی از نوع قاب خمشی ویژه بااتصال RBS و مهاربند همگرای ویژه طراحی شد تا عملکرد لرزه‌ای دو قاب با همدیگر مقایسه شود. درنهایت، 14 تحلیل تاریخچه زمانی غیرخطی دو قاب با استفاده از هفت شتاب‌نگاشت مقیاس شده (حوزه نزدیک) به‌صورت دوبعدی با نرم‌افزار اپنسیس صورت گرفت و نتایج تحلیل غیرخطی دو قاب مورد مقایسه قرار گرفت. نتایج تحلیل صورت گرفته نشان داد که قاب مهاربندی‌شده پین فیوز، عملکرد بسیار بهتری در مقابل قاب مهاربندی‌شده ویژه، ازلحاظ اتلاف انرژی زلزله به‌واسطه فعال شدن فیوزهای اصطکاکی دارد. مزیت دیگر قاب مهاربندی‌شده پین فیوز، تأمین سطح عملکرد ایمنی جانی و کاهش قابل‌توجه هزینه تعمیرات بعد از وقوع زلزله است.

کلیدواژه‌ها

• فیوز اصطکاکی
• سیستم پین فیوز
• قاب مهاربندی‌شده پین فیوز

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عنوان مقاله [English]

Evaluation of the seismic performance of braced pin fuse frame using friction

نویسندگان [English]

• Mohsen Gerami
• Vahid Eskandarian

Department of Civil Engineering Faculty-,University of Semnan,-Semnan-,Iran

چکیده [English]

Pin Fuse is a new type of structural fuse that is installed at the place of plastic hinge of steel structure. The fuse acts through rotational sliding of steel surfaces on each other during an earthquake. The presence of frictional force between the fuse plates causes the loss of seismic energy. Pin fuse frame is a special braced moment frame that its moment connection is of pin fuse and its diagonal brace has a friction fuse which prevents buckling of the brace. In this study, first in comparison with full scale test of pin fuse frame was validated. Afterward, based on the verification, three braced steel frame of the pin fuse at six, nine and  twelve  story were designed. Also, similar frames of special moment with RBS connection and special diagonal brace was designed to compare the seismic performance of the two groups frames. Finally, 42 nonlinear time history analysis of the two frame was performed with opensees software in two dimensions using seven scaled Earthquake acceleration (Near fault) and the results of nonlinear analysis of the two frames were compared. The results of the analysis showed that the pin fuse frame has a much better performance than the special braced frame in terms of seismic energy loss due to the activation of friction fuses(activation of 60% of beam fuses and 85% of brace fuses). Another advantage of the braced pin fuse frame is the supplying of 80% of life safety performance level and significantly reducing the repair cost after an earthquake.

کلیدواژه‌ها [English]

• Friction Fuse
• Pin Fuse System
• Braced Pin Fuse Frame

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