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ارزیابی لرزه‌ای قاب‌های فولادی خمشی کوتاه و میان مرتبه با شکل‌پذیری ویژه مجهز به میراگرهای ویسکوز براساس معیارهای فروریزش FEMA P-695 | ||
| نشریه مهندسی عمران امیرکبیر | ||
| مقاله 17، دوره 53، شماره 6، شهریور 1400، صفحه 2535-2560 اصل مقاله (2.26 M) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22060/ceej.2020.17438.6561 | ||
| نویسندگان | ||
| امیر عباس زاده شهانقی1؛ غلامرضا قدرتی امیری* 2؛ مرتضی رئیسی دهکردی3؛ مهدی اقبالی4 | ||
| 1کارشناس ارشد مهندسی عمران- مهندسی سازه، دانشکده مهندسی عمران، دانشگاه علم و صنعت ایران، تهران، ایران. | ||
| 2استاد، قطب علمی پژوهش‌های بنیادین در مهندسی سازه، دانشکده مهندسی عمران، دانشگاه علم و صنعت ایران، تهران، ایران. | ||
| 3استادیار، دانشکده مهندسی عمران، دانشگاه علم و صنعت ایران، تهران، ایران | ||
| 4استادیار، گروه مهندسی عمران، دانشکده مهندسی، دانشگاه زنجان، زنجان، ایران. | ||
| چکیده | ||
| در این تحقیق عملکرد لرزه‌ای قاب‌های فولادی خمشی ویژه تحت رکوردهای دور از گسل، با و بدون میراگر ویسکوز و با استفاده از FEMA P-695 بررسی شده است. قاب‌های 4، 8، 12 طبقه در دو حالت با و بدون میراگر ویسکوز بر اساس ASCE 7-10 و AISC 360 بارگذاری، تحلیل و طراحی شدهاند و مشخصات میراگرهای ویسکوز برای یک نسبت میرایی مشخص 15% (4 و ۸ طبقه) و 20% (۱۲ طبقه) لحاظ شده است. قاب‌های دارای میراگر و بدون میراگر با قرار دادن مفاصل پلاستیک متمرکز دارای رفتارچرخه ای Bilin در نرم افزار OpenSees مدل‌سازی شدهاند. این قاب‌ها، به روش تحلیل دینامیکی غیر خطی فزاینده (IDA) با استفاده از 44 رکورد زلزله دور از گسل با محدوده وسیعی از مقادیر شدت لرزه‌ای مورد تحلیل و بررسی قرار گرفته‌اند. عملکرد لرزه‌ای قاب‌های مورد مطالعه، به صورت احتمال وقوع فروریزش بر مبنای تحلیلهای احتمالاتی شکنندگی لرزه‌ای و حاشیه ایمنی فروریزش ارائه گردیده است. نتایج نشان میدهد که در قاب‌های خمشی با میراگرهای ویسکوز در سطح احتمال 50% مربوط به منحنی میانه تحلیلهای دینامیکی غیرخطی فزاینده ظرفیت فروریزش قاب‌های 4، 8 و 12 طبقه به مقدار 28% ، 88% و 74% افزایش یافته است. همچنین طراحی ساختمانهای دارای میراگرهای ویسکوز با 75% برش پایه، تاثیر قابل ملاحظهای برکاهش وزن ساختمان و هزینههای ساخت و بهبود رفتار و معیارهای فنی داشته است. | ||
| کلیدواژه‌ها | ||
| قاب خمشی فولادی ویژه؛ میراگر ویسکوز؛ رکوردهای حوزه دور؛ تحلیل دینامیکی فزاینده؛ منحنی شکنندگی؛ معیارهای فروریزش؛ FEMA P-695 | ||
| موضوعات | ||
| ارزیابی آسیب پذیری لرزه ای؛ دینامیک سازه؛ رفتار لرزه ای؛ زلزله های حوزه دور؛ منحنی شکنندگی | ||
| عنوان مقاله [English] | ||
| Seismic evaluation of low and mid-rise steel moment-resisting frames equipped with viscous dampers based on FEMA P-695 collapse capacity | ||
| نویسندگان [English] | ||
| Amir Abbaszadeh Shaha-naghi1؛ Gholamreza Ghodrati Amiri2؛ Morteza Raissi Dehkordi3؛ Mahdi Eghbali4 | ||
| 1M.Sc. , School of Civil Engineering, Iran University of Science and Technology, Tehran, Iran. | ||
| 2Professor, Center of Excellence for Fundamental Studies in Structural Engineering, School of Civil Engineering, Iran University of Science and Technology, Tehran, Iran. | ||
| 3Assistant Professor, School of Civil Engineering, Iran University of Science and Technology, Tehran, Iran | ||
| 4Assistant Professor, Department of Civil Engineering, Faculty of Engineering, University of Zanjan, Zanjan, Iran. | ||
| چکیده [English] | ||
| In this study, the seismic performance of steel special moment-resisting frames was analyzed under far-field records with and without viscous dampers using FEMA P-695. 4, 8, and 12-story frames were loaded, analyzed, and designed with and without viscous dampers based on ASCE 7-10 and AISC360. Furthermore, characteristics of viscous dampers are considered for the specific damping ratio of 15% (4,8-story), and 20% (12-story). The frames with and without dampers were modeled in OpenSees by lumped plasticity with Bilin Material. These frames were analyzed and calculated by Incremental Dynamic Analysis (IDA) under 44 far-field records with “Hunt & Fill” algorithm. The seismic performance of studied frames is presented as the collapse probability based on seismic fragility and collapse safety margin. The results demonstrate that the collapse capacity of 4, 8, and 12- story moment-resisting frames with viscous dampers have improved by 28%, 88%, and 74%, corresponding to the median collapse capacity. Moreover, the design of buildings with 75% of design base shear using viscous dampers has a significant effect on the optimal weight of building and construction costs and improvement of seismic performance and technical criteria. | ||
| کلیدواژه‌ها [English] | ||
| Steel moment-resisting frames, Viscous damper, FEMA P-695, Collapse capacity | ||
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| مراجع | ||
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