مقایسه تحلیلی عملکرد لرزه ای قاب خمشی دسته شده و قاب خمشی ترکیبی میان مرتبه

نوع مقاله: مقاله پژوهشی

نویسندگان

1 کارشناسی ارشد مهندسی عمران- زلزله، دانشگاه خوارزمی.

2 استادیار، دانشکده فنی و مهندسی، دانشگاه خوارزمی.

3 استاد، دانشکده فنی و مهندسی، دانشگاه خوارزمی.

چکیده

دراین پژوهش به بررسی عملکرد لرزه‌ای قاب‌های خمشی میان مرتبه تحت رکوردهای حوزه نزدیک مقیاس شده، با استفاده از تحلیل‌های دینامیکی غیرخطی تاریخچه زمانی (NTHA) و افزایشی (IDA) پرداخته شده است. همچنین تبیین مختصر این مفهوم نیز از دیدگاه تشکیل مفاصل غیرخطی بر اساس تحلیل پوش آور مودال (MPA) نیز آزموده شده است. ماهیت انتشار سه بعدی امواج لرزه‌ای ناشی از رکوردهای زلزله در اسکلت مقاوم سازه، سبب ایجاد نیروهای دینامیکی با دامنه مختلف خواهد شد. وجود و اعمال رکوردهای نیرومند حوزه نزدیک می تواند سبب بزرگی و افزایش شدت تاثیرگذاری نیروهای یاد شده گردد. دو سازه مطالعاتی در این تحقیق، با اسکلت قاب خمشی دسته شده (Bundled Tube) و قاب خمشی ترکیبی (3D Frame) می‌باشند. پارامترهای پاسخ مورد بررسی عبارت از پوش بیشینه دریفت طبقات، بیشینه شتاب طبقات، تاریخچه زمانی دریفت و آرایش مفاصل غیرخطی می‌باشند. همچنین، منحنی‌های IDA متناظر با پارامتر دریفت تحت چند رکورد حوزه نزدیک ترسیم شده است. عملکرد لرز‌ه ای سازه-های مطالعاتی مورد مقایسه و بررسی قرار گرفته است.

کلیدواژه‌ها


عنوان مقاله [English]

Analytical comparison between seismic performance of middle-rise bundled tube and 3d moment frame structures

نویسندگان [English]

  • Vahideh Shirvani Harandi 1
  • Afshin Meshkat-Dini 2
  • Ali Massumi 3
1 MSc, Faculty of Engineering, Kharazmi University, Tehran.
2 Assistant Professor, Faculty of Engineering, Kharazmi University, Tehran.
3 Professor, Faculty of Engineering, Kharazmi University, Tehran.
چکیده [English]

In this study, the performance of resistant skeleton of mid-rise moment frames under scaled near-field earthquake records have been evaluated by using both, incremental dynamic and nonlinear dynamic time history analyses. Also, a brief explanation of this concept through the perspective of the formation of nonlinear hinges has been studied using modal pushover analysis. Three-dimensional propagation of seismic waves in resistant skeleton of buildings create a set of dynamic lateral forces with different intensities in the height of structure. Near-field strong ground motions are able to magnify the intensity of the mentioned forces. The studied structural models are comprising of bundled tube frame and full 3d moment frame resistant skeletons. The evaluated response parameters are the maximum interstory drift, maximum acceleration of stories, the interstory drift time history and configuration of the formed nonlinear hinges. Moreover, the IDA curves corresponding to maximum interstory drift have been drown subjected to a number of near-field ground motions. The performance of studied structures was evaluated and compared.

کلیدواژه‌ها [English]

  • "Incremental dynamic analysis "
  • " Nonlinear dynamic time history analysis "
  • " Bundled tube frame "
  • " 3d moment frame "
  • " Near-fault ground motion "

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