مطالعه روند تغییرات پاسخ لرزه ای اسکلت های ترکیبی قاب محیطی خمشی بلندمرتبه در ساختگاه های نزدیک گسل

نوع مقاله : Articles

نویسندگان

دانشگاه خوارزمی، تهران

چکیده

این پژوهش به بررسی روند تغییرات پاسخ لرزه ای اسکلت های ترکیبی قاب خمشی محیطی و مقایسه آن با سیستم پایه، بر اساس نتایج تحلیل های غیرخطی تحت مجموعه ای از رکوردهای نیرومند سه‌ مؤلفه ای حوزه نزدیک می پردازد. ساختارهای ترکیبی با تعبیه پیکربندی های چند طبقه ای المان های زیپر بزرگ‌مقیاس در اسکلت قاب محیطی خمشی حاصل می گردند. المان‌های زیپر بزرگ‌مقیاس، تنها در پانل های صلب سازه قاب محیطی تعبیه شده و دارای اتصال پیوسته با پانل زون‌های اسکلت مقاوم می‌باشند. پروسه مطالعاتی حاضر شامل بررسی چگونگی تغییرات پارامترهای پاسخ سه اسکلت مقاوم 30 طبقه با و بدون پیکربندی المان‌های زیپر بزرگ‌مقیاس است. طراحی سازه های مطالعاتی بر اساس ضوابط مقررات ملی ساختمان و همچنین ویرایش چهارم آیین نامه طراحی ساختمان ها در برابر زلزله (استاندارد 2800) انجام شده است. مدل سازی رفتار غیرخطی اعضا و تعریف مفاصل پلاستیک بر اساس ضوابط FEMA356 بوده و مجموعه تحلیل های غیرخطی تاریخچه زمانی با استفاده از نرم‌افزار SAP 2000 صورت گرفته است. کاربرد المان های زیپر بزرگ‌مقیاس در سیستم قاب محیطی خمشی، سبب پخش به نسبت یکنواخت تر نیروی محوری، برش، لنگر خمشی و پیچشی دینامیکی در ستون های محیطی پلان و کاهش دامنه دوران غیرخطی اتصالات می شود. همچنین، ارزیابی پارامترهای پاسخ دینامیکی این سازه ها نشان-دهنده‌ی بهره وری بالاتر سیستم سازه ترکیبی فوق بوده و کاهش نسبی پارامترهای پاسخ لرزه‌ای را در پی دارد.Study on the Seismic Response Variations of Tall Hybrid Framed Tube Skeletons in Near- Fault SitesMahboobeh Aboutalebi1, Afshin Meshkat-Dini2* and Jafar Keyvani Ghamsari31. Ph.D. Student, Kharazmi University, Tehran, Iran 2. Assistant Professor, Kharazmi University, Tehran, Iran, *Corresponding Author, email: meshkat@khu.ac.ir 3. Associate Professor, Kharazmi University, Tehran, IranKeywords: Tall Building, Framed Tube, Large-Scale Zipper Element, Near Fault, Panel Zone.--English abstract is in the final page of the pdf file--

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