مهندسی سازه و ساخت

مهندسی سازه و ساخت

ضوابط اولیه طراحی ساختمان های فولادی دارای حرکت گهواره ای کنترل شده

نوع مقاله : علمی - پژوهشی

نویسندگان
1 دانشجوی دکتری رشته مهندسی عمران، دانشکده عمران معماری و هنر، دانشگاه آزاد اسلامی واحد علوم و تحقیقات، تهران، ایران
2 دانشیار، پژوهشگاه بین المللی زلزله شناسی و مهندسی زلزله، تهران، ایران
3 استادیار، گروه مهندسی عمران، دانشکده عمران معماری و هنر، دانشگاه آزاد اسلامی واحد علوم و تحقیقات، تهران، ایران
چکیده
فلسفه طراحی در آئین نامه‌های متداول بر این اساس است که ساختمان‌ها در زلزله‌های شدید آسیب ببینند ولی ویران نشوند و ایمنی جانی ساکنین ساختمان را به خطر نیندازند. اما این فلسفه طراحی می‌تواند مشکلات زیادی را ایجاد کند و سبب تخریب‌های گسترده شود. چرا که در هنگام وقوع زلزله ساختمان‌های زیادی دچار آسیب می‌شوند و هزاران نفر بی‌خانمان می‌شوند. یک ایده اساسی برای حل این مشکلات، طراحی و اجرای ساختمان‌های تعمیرپذیر و تاب‌آور است که بتوانند با تعمیر بخش‌های آسیب‌دیده که از قبل در آن‌ها طراحی شده است دوباره قابل استفاده باشند. یکی از مهمترین ساختمان‌های تعمیرپذیر و تاب‌آور ساختمان‌های با حرکت گهواره‌ای است. در این تحقیق ابتدا ساختمان‌هایی طبق آیین‌نامه طراحی شده و سپس همین ساختمان‌ها با اضافه کردن لینک‌های جاذب انرژی در پای ستون‌های پیرامونی و حذف ستون‌های میانی طبقه ‌همکف ، عملکرد گهواره‌ای در آن‌ها ایجاد شده است . ساختمان‌ها با سه نوع مدل سازی با تعداد طبقات 9، 12 و 15 طبقه با پلان‌های مستطیل، مربع، شش‌ضلعی و هشت‌ضلعی انتخاب شده‌اند. خروجی مربوط به مقادیر ماکسیمم جابجایی بام، جابجایی نسبی طبقات، ظرفیت دوران مفاصل پلاستیک و شتاب بام در مدل‌های مختلف محاسبه شده و در جداول مختلف با هم مقایسه شده‌اند. این تحقیق با مقایسه رفتار دو نوع سیستم به این نتیجه رسید که در ساختمان‌های با عملکرد گهواره‌ای، جابجایی بام 45 درصد کاهش، جابجایی نسبی طبقات 50 درصد کاهش و ظرفیت دوران مفاصل پلاستیک ایجاد شده 40 درصد کاهش می‌یابد. همچنین در پایان، رابطه‌ای برای طراحی اولیه سازه‌های با حرکت گهواره‌ای و با پلان‌های مختلف ارایه شده است.
کلیدواژه‌ها

موضوعات


عنوان مقاله English

basic design criteria for steel buildings with controlled rocking building

نویسندگان English

Mohammad Sadrara 1
Mahmood Hosseini 2
Armin Aziminejad 3
1 Ph.D. Candidate in Civil Engineering, Faculty of Civil Engineering Architecture and Art, Science and Research Branch, Islamic Azad University, Tehran, Iran
2 Associate professor, Structural Engineering Research Centre, International Institute of Earthquake Engineering and Seismology (IIEES), Tehran, Iran
3 Assistant Professor, Department of Civil Engineering, Faculty of Civil Engineering Architecture and Art, Science and Research Branch, Islamic Azad University, Tehran, Iran
چکیده English

The design philosophy in common regulations is based that buildings are damaged in severe earthquakes but not destroyed and do not endanger the safety of the building's occupants. But this design philosophy can cause many problems and cause very destruction. Because during an earthquake, many buildings are damaged and thousands of people become homeless. A basic idea to solve these problems is design and implement repairable and resilient buildings that can be used again by repairing the damaged parts. One of the most important repairable and resilient buildings is the buildings with rocking motion. In this research, first, buildings were designed according to the regulations, and then these same buildings were desined by adding energy absorbing links at the foot of the surrounding columns and removing the middle columns of the base floor. The buildings have been selected with three types of modeling with the number of 9, 12 and 15 stories with rectangular, square, hexagonal and octagonal plans. The output of the maximum displacement of the roof, the relative displacement of floors, the moment capacity of the plastic joints and the acceleration of the roof have been calculated in different models and compared in different tables. By comparing the behavior of two types of systems, this research concluded that in the rocking buildings, the displacement of the roof is reduced by 45%, the relative displacement of floors is reduced by 50%, and the capacity of the created plastic joints is reduced by 40%. Also, at the end, a relationship is presented for the initial design of structures with rocking motion and with different plans.

کلیدواژه‌ها English

Rocking building
Shear fuses at the foot of the column
Multifaceted plan
Non-stop use
Repairable and resilient buildings
Energy absorbing links
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  • تاریخ دریافت 24 تیر 1404
  • تاریخ بازنگری 25 مهر 1404
  • تاریخ پذیرش 18 آبان 1404