ارزیابی روش‌های پیشرفته تحلیل استاتیکی غیرخطی

نوع مقاله: علمی - پژوهشی

نویسندگان

1 استادیار، دانشکده مهندسی عمران، دانشگاه علم و صنعت ایران

2 کارشناس ارشد سازه، دانشکده مهندسی عمران، دانشگاه علم و صنعت ایران

چکیده

روش‌های استاتیکی غیرخطی بدلیل سادگی به عنوان یکی از محبوبترین ابزارهای تحلیل در برآورد تقاضای سازه می‌باشند. این رویکردها یک نمایش گرافیکی موثر از پاسخ کلی سازه از طریق منحنی پوش اور ارائه می‌دهند. این نوع از نمایش پاسخ کلی، اجازه‌ی یک ایده‌آل سازی مستقیم از سازه به عنوان سیستم یک درجه آزاد را فراهم می‌سازد. در این پژوهش گام اول هر تحلیل استاتیکی غیرخطییا به عبارتی دیگر انجام یک آنالیز پوش اور مورد بررسی قرار گرفته است. الگوی بار اعمال شده به سازه نه تنها در پاسخ کلی سازه از طریق منحنی ظرفیت سازه اثر گذار است، بلکه پاسخ‌های موضعی سازه را مستقیما تحت تاثیر قرار می‌دهد. بمنظور ارزیابی الگوهای بار جانبی، سازه‌های فولادی مهاربندی همگرای کمانش تاب با استفاده از روش‌های پوش اور مودال پیشرفته مورد بررسی قرار خواهند گرفت. نتایج بدست آمده از این تحلیل‌ها با تحلیل دقیق دینامیکی غیرخطی تاریخچه زمانی به عنوان دقیق‌ترین روش موجود مقایسه خواهند شد، که در انتها کارا ترین روش موجود در این سازه‌ها مشخصو معرفی شود. تحلیل‌های انجام شده در این سازه‌ها نشان می‌دهد که الگوی بار بهنگام براساس برش طبقات نتایج مطلوبی از پاسخ بیشینه سازه ارائه می‌دهد.

کلیدواژه‌ها


عنوان مقاله [English]

Evaluation of Advanced Nonlinear Static Procedure

نویسندگان [English]

  • Mohsen Ali Shayanfar 1
  • Reza ZareBidoki 2
1 Assistant Professor, Department of Civil Engineering, Iran University of Science and Technology
2 MSc in Structural Engineering, Department of Civil Engineering, Iran University of Science and Technology
چکیده [English]

Having very simplicity, nonlinear static procedures (NSPs) are the most popular tools for estimation of structural capacity. These approaches construct a graphic display of the overall structural response via a pushover curve. The overall response of the system provides a direct simulation of the building as single degree of freedom (SDOF) system that simplifies the design and evaluation of the structure. In this research, the first step in any nonlinear static analysis or in other words perform a pushover analysis has been studied. Applied lateral load to the structural model not only affects the overall responses of the structure through structural capacity curve, but also directly affects the local responses of the structure. In order to evaluate these lateral loads, steel buckling restrained braced frame structures are examined by advanced modal pushovers. Next, the results of these pushover analyses will be compared with nonlinear time history analysis as the most accurate method. Finally, the most efficient method in this particular structure is introduced. The analysis conducted in these structures shows that the lateral load pattern based on story shears offers a good prediction of the maximum response of the concentrically buckling restrained braced frame buildings.

کلیدواژه‌ها [English]

  • lateral load patterns
  • Adaptive
  • Nonlinear time history analysis
  • Pushover
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