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ارزیابی رفتار لرزهای ساختمانهای قاب فولادی SAC مقاومسازی شده با میراگرهای ویسکوز تحت تاثیر زلزلههای گسل دور و نزدیک | ||
| نشریه مهندسی عمران امیرکبیر | ||
| دوره 54، شماره 5، مرداد 1401، صفحه 1983-2004 اصل مقاله (2.29 M) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22060/ceej.2021.20042.7324 | ||
| نویسندگان | ||
| سعید قشلاقی1؛ مازیار فهیمی فرزام2؛ فریبرز ناطقی الهی* 3 | ||
| 1فارغ التحصیل / پژوهشگاه بین المللی زلزله شناسی و مهندسی زلزله | ||
| 2گروه مهندسی عمران، دانشکده فنی و مهندسی، دانشگاه مراغه، مراغه، ایران | ||
| 3هئیت علمی / پژوهشگاه بین المللی زلزله شناسی و مهندسی زلزله | ||
| چکیده | ||
| اخیراً به کارگیری راهکارهای افزایش مقاومت و میراییِ سازه ها در برابر بارهای لرزه ای، با هدف افزایش ایمنی در برابر کاهش هزینه اجرا و نگهداری، مورد توجه محققین قرار گرفته است. از جمله مهمترینِ این راهکارها می توان به ترکیب قاب های فولادی به همراه میراگرهای ویسکوز اشاره نمود. همچنین در زمینه کنترل غیرفعال سازهها، یکی از توانمندترین ابزارها، میراگرهای ویسکوز میباشند که در جهت جذب انرژی زلزله و اتلاف آن جهت کاهش پاسخ سازه مورد استفاده قرار میگیرند. لذا هدفِ این پژوهش تحلیل اثر این سیستم سازهای بر پاسخ قاب های معیار SAC که در 3، 9 و 20 طبقه احداث شدهاند، در مقابله با بارهای لرزه ای می باشد. برای بررسی این موضوع در این مطالعه ابتدا مدل عددی میراگر ویسکوز با استفاده از نرمافزار آباکوس ایجاد شده است. در ادامه، اثر اعمال شتاب گسل دور و نزدیک زلزله های امپریالولی، لوماپریتا و نورثریج بر رفتار این سیستم سازهای به طور جداگانه ارزیابی شده و نتایج شامل دریفت طبقات، ظرفیت باربری (به صورت برش پایه بیشینه) و جذب انرژی سازه (در دو حالت کار خارجی و انرژی کرنشی) مورد بحث و بررسی قرار گرفته است. نتایج به طور میانگین برای سه سازه مورد بحث، بیانگر کاهش 200 درصدیِ دریفت، افزایش 30 درصدی ظرفیت باربری و افزایش 35 درصدی جذب انرژی سازه های فولادی معیار SAC پس از اعمال میراگر ویسکوز بوده است. | ||
| کلیدواژهها | ||
| قاب فولادی SAC؛ میراگر ویسکوز؛ ظرفیت باربری؛ جذب انرژی؛ تحلیل تاریخچه زمانی | ||
| موضوعات | ||
| میراگرها؛ مقاوم سازی سازه های فلزی | ||
| عنوان مقاله [English] | ||
| Evaluation of the seismic behavior of SAC steel frame buildings retrofitted with viscous dampers affected by far and near fault earthquakes | ||
| نویسندگان [English] | ||
| saeid gheshlaghi1؛ Mazyar Fahimi Farzam2؛ Fariborz Nateghi-A3 | ||
| 1Graduate / International Institute of Seismology and Earthquake Engineering | ||
| 2Department of Civil Engineering, Faculty of Engineering, University of Maragheh, Maragheh, Iran | ||
| 3Faculty / International Institute of Seismology and Earthquake Engineering | ||
| چکیده [English] | ||
| Researchers have recently considered ways to increase the strength of and damping of the structures against earthquake loads so as to reduce maintenance and maintenance costs while enhancing safety. These solutions include the combination of steel frames with viscous dampers as the most vital part. Additionally, one of the most powerful tools in passive control is viscous dampers, which absorb earthquake energy and reduce the structure's response to earthquakes. Therefore, we have undertaken this study to investigate the response of standard SAC frames, built-in three, nine, and twenty floors, by applying this structural system to seismic loadings. The issue was first investigated using the Abaqus software package's numerical model of the viscous damper. Then, the effect of applying acceleration of faults of far and near-field Imperial Vali, Lomaprita, and Northridge earthquakes on the behavior of this structural system is evaluated separately. The results include floor drift, load-carrying capacity (as maximum base shear), and energy absorption of the structure (in two External working modes and strain energy) are discussed. Applied viscous dampers resulted in an average 200% decrease in drift, a 30% increase in load-carrying capacity, and a 35% increase in energy absorption in SAC standard steel structures after the application of these dampers. | ||
| کلیدواژهها [English] | ||
| SAC steel frame, Viscous damper, Bearing capacity, Energy absorption, Time history analysis | ||
| مراجع | ||
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