مهندسی سازه و ساخت

مهندسی سازه و ساخت

ارزیابی عملکرد و تاب آوری لرزه ای سازه های فولادی با ستون های فولادی پر شده با بتن

نوع مقاله : علمی - پژوهشی

نویسندگان
1 کارشناس ارشد مهندسی سازه، دانشکده فنی و مهندسی، دانشگاه زنجان، زنجان، ایران
2 استادیار گروه مهندسی عمران، دانشکده فنی و مهندسی، دانشگاه زنجان، زنجان، ایران
چکیده
با توجه به نیاز زیر ساخت‌ها و جوامع به داشتن رفتار انعطاف پذیر در مقابل فجایع طبیعی و غیرطبیعی، مفاهیمی مانند تاب‌آوری به منظور کمی‌سازی توانایی یک سیستم برای کاهش تبعات ناشی از زمین‌لرزه و بازیابی سریع سازه بعد از به وقوع پیوستن آن تعریف شده است. در این پژوهش به منظور بررسی عملکرد لرزه‌ای سازه‌های فولادی با ستون‌های مرکب تشکیل شده از بتن و فولاد، با بازطراحی یک دسته سازه‌ی فولادی با فرض داشتن ستون‌های مرکب فولادی و بتنی و یا باکس فولادی، این سازه‌ها به صورت غیرخطی مدل‌سازی و با استخراج پاسخ‌های آن‌ها به کمک تحلیل IDA، خسارات و شاخص تاب‌آوری در سطوح مختلف خطر لرزه‌ای ارزیابی و محاسبه و با هم مقایسه گردیده است. نتایج این پژوهش نشان دهنده مزیت و عملکرد لرزه‌ای مناسب ستون-های مرکب فولادی و بتنی نسبت به ستون‌های فولادی در اغلب سطوح خطر لرزه‌ای علی‌رغم کاهش مصرف فولاد می‌باشد. به طوریکه میزان شاخص تاب‌آوری سازه‌های با ستون‌های مرکب در زلزله با دوره بازگشت 2500 ساله نسبت به سازه‌های با ستون-های باکس فولادی بین 2 تا 5 درصد افزایش یافته است. این بهبود عملکرد در حالی رخ می‌دهد که میزان فولاد مصرفی در ستون-های قاب‌های خمشی و مهاربندی شده به‌طور متوسط 33% کاهش را نشان می‌دهد.
کلیدواژه‌ها

موضوعات


عنوان مقاله English

Seismic Performance and Resilience Assessments of Concrete Filled Tube (CFT) Composite Column Buildings

نویسندگان English

Amir Heidari 1
Ehsan Tafakori 2
1 MSc of Structural Engineering, Department of Civil Engineering, Zanjan University, Zanjan, Iran
2 Assistant Professor, Department of Civil Engineering, Zanjan University, Zanjan, Iran
چکیده English

Considering the need of infrastructures and societies for suitable and flexible behavior against disasters, such as earthquake, concepts such as resilience have been defined in order to quantify the ability of a system to reduce the consequences of an earthquake or other disasters and quickly recover the structure after it. In this research, in order to study and investigate the seismic performance of steel structures with composite columns, a group of steel structures are redesigned with the assumption of using composite box columns. The nonlinear models of these structures are created. Then, losses and resilience indexes are evaluated and compared in different seismic risk levels using results of IDA analysis. Despite the reduction of steel consumption, the results of this research show the advantage and appropriate seismic performance of composite columns compared to steel columns in most of the seismic risk levels. So that the resilience index of structures with composite columns in an earthquake with a return period of 2500 years increases between 2% and 5% compared to structures with steel box columns. This improvement in performance occurs while the amount of steel consumed in the columns of moment frames and braced ones shows an average reduction of 33%.

کلیدواژه‌ها English

Composite Columns
Nonlinear Evaluation
Loss Evaluation
Resilience
IDA Analysis
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  • تاریخ دریافت 26 فروردین 1402
  • تاریخ بازنگری 09 مرداد 1402
  • تاریخ پذیرش 03 آبان 1402