مطالعه پارامتری عملکرد میراگر مایع تنظیم شده در کنترل ساختمان فولادی معیار تحت بارهای لرزه‌ای

نوع مقاله : علمی - پژوهشی

نویسندگان

1 گروه مهندسی عمران، دانشکده فنی و مهندسی، دانشگاه مراغه، مراغه، ایران

2 گروه مهندسی مکانیک، دانشکده فنی و مهندسی، دانشگاه مراغه، مراغه، ایران

چکیده

بهبود رفتار ساختمان‌ها و کاهش پاسخ‌ آن‌ها در برابر بارهای جانبی دینامیکی همواره یکی از اهداف مهندسین سازه می‌باشد. یکی از توسعه‌ یافته‌ترین روش‌های کاهش پاسخ سازه‌ها تحت ارتعاشات استفاده از سیستم‌های کنترل غیرفعال است. میراگر مایع تنظیم شده (TLD ) یکی از ابزارهای پرکاربرد سیستم‌های کنترلی غیرفعال می‌باشد. در این پژوهش عملکرد میراگر مایع تنظیم شده تحت 14 رکورد زلزله حوزه دور و حوزه نزدیک در نرم افزار انسیس مورد بررسی قرار گرفته است. به منظور بررسی عملکرد میراگر مایع تنظیم شده در کاهش پاسخ‌های جابجایی، شتاب و سرعت ساختمان معیار مورد بررسی، چهار پارامتر طول مخزن، ارتفاع آب، نسبت آب و نسبت جرم (مجموعا در 27 طراحی متفاوت براساس روابط به فرم بسته موجود در ادبیات فنی) مورد بررسی قرار گرفت. با توجه به نتایج بدست آمده مخزن مکعبی با نسبت آب 375/0 و نسبت جرم 5 درصد تحت رکورد حوزه نزدیک و نسبت آب 125/0 و نسبت جرم 5 درصد تحت رکورد حوزه دور در مقایسه با سایر حالت‌ها عملکرد بهتری داشته است. به صورت کلی هرچه نسبت جرم بیشتر باشد عملکرد میراگر در کلیه شاخص‌های مورد بررسی و در بین حالت‌های در نظر گرفته شده بهتر بوده است و همچنین کاهش پاسخ‌ها در شتاب بهتر از سرعت و در سرعت بهتر از جابجایی می‌باشد.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Parametric study of tuned liquid damper performance to control a benchmark steel building under seismic loads

نویسندگان [English]

  • maziar fahimi farzam 1
  • babak alinejad 1
  • rasool maroofiazar, 2
  • hajar kazemi sormoli 1
1 Department of Civil Engineering, Faculty of Engineering, University of Maragheh, Maragheh, Iran.
2 Department of Mechanical Engineering, Faculty of Engineering, University of Maragheh, Maragheh, Iran
چکیده [English]

One of the aims of structural engineers is to improve the behavior of structures and reducing their responses under dynamic lateral loads. The structural control systems are advanced techniques to reduce the structural responses against vibration, and Tuned Liquid Damper (TLD) is a well-established tool for the control of structures. In this study, the effect and behavior of TLD under 7 far-field earthquakes and 7 near-field earthquakes was investigated in ANSYS software. To assess the performance of TLD on the control of structural responses including displacement, acceleration, and velocity, the effect of four different design parameters i.e., tank length, water height, water ratio, and mass ratio (with 27 different designed alternatives based on closed-form relationships proposed in the literature) were studied. The results showed that when the water ratio and the mass ratio of the cubical container are equal to 0.375 and 5 percent respectively, The TLD had the best performance under near-fault records. Also, the designed TLD with a 5 percent mass ratio and 0.125 water ratio outperforms other designed alternatives under far-fault records. In general, and among the considered alternatives, the performance of the damper with a higher mass ratio improves all studied performance criteria. Also, the well-designed TLD could reduce the acceleration better than velocity, and velocity better than displacement.

کلیدواژه‌ها [English]

  • Passive Control
  • Tuned Liquid Damper
  • Parametric Analysis
  • Far and Near-Field Earthquakes
  • Ansys
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