کاهش پاسخ سازه های غیرخطی هیسترسیس با استفاده از میراگر جرمی چندگانه ی بهینه

نوع مقاله : پژوهشی

نویسندگان

محقق اردبیلی

چکیده

در این پژوهش به بررسی کارآیی میراگر جرمی تنظیم شده ی چندگانه (MTMD) در کاهش ارتعاشات سازه های غیرخطی هیسترسیس پرداخته شده است که پارامترهای بهینه ی MTMD براساس کمینه کردن بیشینه ی تغییرمکان جانبی نسبی تعیین شده است. برای حل مسئله ی بهینه سازی از الگوریتم ژنتیک ((GA استفاده شده است. برای آنالیز عددی، قاب برشی 8 طبقه با منحنی هیسترسیس دوخطی تحت ارتعاش اغتشاش سفید قرار گرفته و به طراحی بهینه ی مکانیزم MTMD پرداخته شده است. نتایج به‌دست آمده مؤثر بودن روش پیشنهادی را در طراحی MTMDروی سازه-های غیرخطی نشان می دهد. هم‌چنین می توان گفت که MTMD در صورت طراحی بهینه می تواند خرابی را در سازه های غیرخطی کاهش دهد که میزان کاهش وابسته به مشخصات زلزله‌ی ورودی و درصد جرمی می باشد.

کلیدواژه‌ها


عنوان مقاله [English]

Reducing the Seismic Response of Nonlinear Hysteretic Structures Using Optimal Multiple Tuned Mass Dampers

نویسندگان [English]

  • Mohtasham Mohebbi
  • Hosein Shabani
  • Solmaz Moradpour
University of Mohaghegh Ardabili
چکیده [English]

In this research, the effectiveness of multiple tuned mass dampers (MTMDs) in mitigating the response of nonlinear hysteretic structures has been studied where the optimal parameters of MTMDs have been determined based on minimization of maximum relative displacement (drift) of structure. For solving the optimization problem the genetic algorithm (GA) has been used successfully. For numerical analysis, an eight-storey bilinear hysteretic shear frame subjected to a white noise excitation and optimal MTMDs have been designed. The results of numerical simulations have shown the effectiveness of the proposed method in designing optimal MTMDs for nonlinear structures. Also, it can be said that the damage of structure can be reduced using optimal MTMDs where the performance has been affected by earthquake characteristics and mass ratio.

کلیدواژه‌ها [English]

  • Passive Control
  • Tuned Mass Damper (TMD)
  • Multiple Tuned Mass Dampers (MTMD)
  • Nonlinear Shear Frame
  • Optimization
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