مهندسی سازه و ساخت

مهندسی سازه و ساخت

تحلیل احتمالاتی خرابی میراگر در قاب‌های فولادی مجهز به میراگر ویسکوز مایع

نوع مقاله : علمی - پژوهشی

نویسندگان
1 استاد، دانشکده فنی و مهندسی، دانشگاه محقق اردبیلی، اردبیل، ایران
2 فارغ التحصیل دکترای مهندسی زلزله، دانشکده مهندسی عمران، دانشگاه صنعتی نوشیروانی بابل، بابل، ایران
10.22065/jsce.2025.533248.3768
چکیده
در ارزیابی عملکرد لرزه‌ای سازه‌های مجهز به میراگر ویسکوز مایع، خرابی میراگر ویسکوز مایع نظیر رسیدن به ظرفیت نیرویی یا طول بازوی جابجایی میراگر می‌تواند باعث عدم تحقق عملکرد مورد انتظار از میراگر ویسکوز در کنترل پاسخ لرزه‌ای شود. در این پژوهش هدف تعیین احتمال خرابی میراگر براساس توابع حدی مختلف مرتبط با حداکثر نیرو و جابجایی میراگر با اعمال عدم قطعیت در پارامترهای سازه، میراگر و رکورد ورودی می‌باشد. برای آنالیز عددی، دو قاب خمشی فولادی 4 و 12 طبقه مجهز به میراگر ویسکوز خطی طراحی شده بر اساس روش جابجایی مستقیم در نظر گرفته شده است. با اعمال عدم قطعیت در پارامترهای سازه و میراگر، قاب-های تصادفی با استفاده از روش نمونه‌گیری لاتین هایپر کیوب (LHS)تولید شده و با انجام تحلیل قابلیت اعتماد، احتمال خرابی میراگر با اعمال ضرایب اطمینان مختلف در حداکثر نیرو و جابجایی میراگر محاسبه شده است. نتایج ارزیابی روی سازه‌های مورد مطالعه نشان می‌دهد که در صورت عدم اعمال ضریب اطمینان، حداکثر مقدار احتمال خرابی میراگر براساس تابع حدی مرتبط با حداکثر نیرو و جابجایی میراگر به‌ترتیب حدود 15 و 16/5 درصد بوده است که با اعمال ضریب اطمینان برابر 2 طبق توصیه دستورالعمل‌های طراحی، می‌توان از تاثیر خرابی میراگر در ارزیابی احتمالاتی سازه‌های مجهز به میراگر صرفنظر کرد.
کلیدواژه‌ها

موضوعات


عنوان مقاله English

Probabilistic analysis of damper failure in steel frames equipped with fluid viscous damper

نویسندگان English

Mohtasham Mohebbi 1
Solmaz Moradpour 2
1 Professor, Faculty of Technical and Engineering, University of Mohaghegh Ardabili, Ardabil, Iran
2 Ph.D, Civil Engineering Department , Babol Noshirvani University of Technology, Babol, Iran
چکیده English

In the seismic performance assessment of structures equipped with fluid viscous dampers (FVDs), damper failures such as reaching the force capacity or stroke length limit can cause the viscous damper to deviate from the expected performance in controlling the seismic response of structures. The objective of this study is to determine the probability of damper failure based on various limit state functions related to the maximum force and displacement of the damper, while incorporating uncertainty in the structural parameters, damper properties, and input ground motion records. For the numerical analysis, two steel moment resisting frames with 4 and 12 stories, equipped with linear FVDs designed according to the direct displacement-based design method, have been considered. By applying uncertainties in the structural and damper parameters, random frames were generated using the Latin Hypercube Sampling (LHS) method. A reliability analysis was then conducted to calculate the probability of damper failure under different safety factors applied to the maximum force and displacement of the dampers. The results for the studied structures indicate that without any safety factor, the maximum probability of damper failure based on the force capacity and stroke length limit state functions is approximately 15% and 16.3%, respectively. However, by applying a safety factor of 2, as recommended by design guidelines, the effect of damper failure can be ignored in the probabilistic assessment of structures equipped with FVDs.

کلیدواژه‌ها English

Structural reliability
Damper failure
Damper force capacity
Damper stroke length
Latin Hypercube
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  • تاریخ دریافت 28 تیر 1404
  • تاریخ بازنگری 26 مهر 1404
  • تاریخ پذیرش 07 آذر 1404