نشریه علمی سازه و فولاد

نشریه علمی سازه و فولاد

بهینه‌یابی بر مبنای عملکرد و ارزیابی لرزه‌ای سازه‌های بلند با سیستم مهاربندی زیپر و شورون

نوع مقاله : مقاله پژوهشی

نویسندگان
1 گروه عمران، دانشکده فنی، دانشگاه آزاد اسلامی واحد ارومیه
2 دانشکده فنی، دانشگاه آزاد اسلامی واحد ارومیه
چکیده
طراحی بهینۀ سازه‌ها و کاهش مواد مصرفی در اجرای سازه‌ها یک چالش پیش رو در روند طراحی مهندسی است. یک روش کارآمد برای نیل به هدف فوق، استفاده از الگوریتم‌های فراکاوشی است. بااین‌حال اکثر بررسی‌های انجام‌شده درخصوص استفاده از این الگوریتم‌ها در مهندسی سازه محدود به ارائۀ مفاهیم طراحی بوده و جنبۀ عملی در آن‌ها کم‌تر بوده است. هدف اصلی این مطالعه کاربرد عملی روش‌های بهینه‌یابی ارائه‌شده و به‌حداقل‌رساندن وزن سازه‌ای و مقایسۀ وزن بهینه در قاب‌های فولادی بلند با سیستم باربر جانبی زیپر و شورون در معرض بارهای لرزه‌ای و در عین‌حال برآورد تمامی نیازهای آیین‌نامه‌ای است. به‌منظور رسیدن به هدف فوق، قاب‌های فولادی 10 و 15 طبقه با استفاده از الگوریتم‌های مختلف، که عملکرد آن‌ها در مقالات مختلف به اثبات رسیده است، برای بهینه‌یابی در این مطالعه مورد استفاده قرار گرفته است. سیستم باربر جانبی زیپر به‌منظور اصلاح رفتار فراکمانشی سیستم مهار جانبی شورون پیشنهاد شده و ضعف‌های سیستم شورون را بعد از کمانش بادبندهای آن جبران می‌نماید. برای تخمین دقیق‌تر رفتار این سیستم‌ها در رویارویی با بارهای لرزه‌ای روش طراحی مورد استفاده به‌منظور بهینه‌یابی قاب‌های فوق در این مطالعه، آنالیزهای غیرخطی و طراحی بر مبنای عملکرد است. نتایج به‌دست‌آمده توسط الگوریتم‌های مختلف بهینه‌یابی در این بررسی، نشانگر برتری الگوریتم اصلاح‌شده دلفین نسبت به سایر الگوریتم‌ها و همچنین کاهش وزن بهینه 6% سیستم زیپر نسبت به سیستم شورون است. همچنین تأیید و تصدیق‌های ارائه‌شده توسط آنالیز دینامیکی افزاینده بیانگر  قابل‌اطمینان‌تربودن سیستم زیپر نسبت به شورون است.
کلیدواژه‌ها

موضوعات


عنوان مقاله English

Performance based optimization and seismic assessment of tall structures with zipper and chevron bracing system

نویسندگان English

Keyvan Farzad 1
Hamed Mohammadi 2
1 Department of Civil Engineering, Faculty of Engineering, Islamic Azad University, Urmia, Iran
2 Faculty of Engineering Islamic Azad University Urmia Iran
چکیده English

Optimal structural design and reducing material consumption are ongoing challenges in engineering practice. An effective approach to achieve these goals is the use of metaheuristic optimization algorithms. However, most studies employing such algorithms in structural engineering have focused mainly on conceptual design, with limited emphasis on practical implementation. The main objective of this study is to apply practical optimization methods to minimize structural weight and to compare the optimal weight of tall steel frames equipped with zipper and chevron braced lateral systems under seismic loading, while satisfying all code requirements. To this end, 10- and 15-story steel frames were optimized using several metaheuristic algorithms whose performance has been validated in previous research. The zipper braced system has been proposed to improve the post-buckling behavior of chevron braced frames and to compensate for their weaknesses after brace buckling. To better capture the seismic behavior of these systems, nonlinear analyses and performance-based design procedures were employed in the optimization process. The results show that the modified Dolphin algorithm outperforms the other optimization algorithms considered in this study. In addition, the zipper system achieves approximately 6% lower optimal weight compared to the chevron system. Incremental Dynamic Analysis (IDA) results further confirm that the zipper system provides higher reliability and superior seismic performance than the chevron system.

کلیدواژه‌ها English

Metaheuristic Algorithm
Zipper Braced Frame
Performance Based Design
Incremental Dynamic Analysis
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  • تاریخ دریافت 14 مهر 1404
  • تاریخ بازنگری 03 آذر 1404
  • تاریخ پذیرش 14 آذر 1404
  • تاریخ اولین انتشار 14 آذر 1404
  • تاریخ انتشار 01 مهر 1404