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

مهندسی عمران فردوسی

مقاله 1، دوره 26، شماره 2، شهریور 1394، صفحه 1-20   

نوع مقاله: پژوهشی

شناسه دیجیتال (DOI): 10.22067/civil.v26i2.16599

نویسندگان

محتشم محبی^* ؛ حسین شعبانی؛ سولماز مرادپور

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

کنترل غیرفعال؛ میراگر جرمی تنظیم شده؛ میراگر جرمی تنظیم شده ی چندگانه؛ قاب برشی غیر خطی؛ بهینه سازی

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