روش جدید برآورد فرکانس طبیعی ساختمان‌های بلند هرمی برای سیستم لوله در لوله و لوله با دیوار برشی

نوع مقاله : علمی - پژوهشی

نویسندگان

1 عضو هئیت علمی دانشگاه محقق اردبیلی

2 دانشجوی دکتری

3 استادیار گروه مهندسی عمران - دانشگاه محقق اردبیلی

چکیده

نیاز انسان به فضاهای مناسب و کافی برای زندگی و کار از یک سو و تراکم جمعیت و افزایش قیمت زمین و استفاده هر چه بیشتر از ساختمان‌هایی با ارتفاع بالا نیاز به تحقیقات در خصوص این سازه‌ها نیز افزایش می‌‌یابد. سیستم لوله‌ای هرمی نیز یکی سیستم‌های سازه‌ای مناسب برای ساختمان‌هایی با ارتفاع بالاست. هدف از این تحقیق بدست آوردن یکی از ویژگی‌های مهم دینامیکی یعنی فرکانس طبیعی (ω) برای تعدادی از ساختمان‌های بلند با سیستم لوله‌ای، لوله‌ای هرمی است و یک روش تقریبی نیز برای تجزیه، تحلیل و محاسبه فرکانس طبیعی با سیستم لوله‌ای هرمی ترکیبی با دیوار برشی، لوله در لوله هرمی ارائه می‌‌شود. اندازه زاویه هرم قاب لوله‌ای نسبت به امتداد قائم (طول ارتفاع) سازه متغیر می‌باشد روش پیشنهادی در اینجا ما را قادر می‌سازد تا با کمک برنامه نویسی رایانه‌ای، فرکانس طبیعی ساختمان‌های بلند لوله‌ای عمودی و هرمی شکل را محاسبه کنیم و مدل ها به دو صورت المان محدود و روش تحلیلی ریاضی مورد تجزیه و تحلیل قرار گرفتند. نتایج حاکی از آن است که روش مورد بررسی فرکانس طبیعی را به درستی محاسبه می‌کند و انطباق خوبی با نتایج المان محدود دارد و سازگاری بهتری با سازه‌های بدون زاویه هرمی و با ارتفاع بیشتر دارد و مقدار خطای محاسباتی حاصله بسیار کم می‌‌-باشد. نتایج مدل پیشنهادی ریاضی که روشی آسان برای استفاده و روش قابل فهم از ویژگی‌های دینامیکی سازه و اثر تغییرات زاویه برفرکانس می‌پردازد. همچنین این روش تحلیلی کمترین خطا را برای سیستم‌های لوله در لوله و بیشترین خطا را برای سیستم لوله‌ای ترکیبی با دیوار برشی هرمی و قائم دارند.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

New method of estimating natural frequency of tall pyramidal buildings for tube-in-tube and tube with shear wall systems

نویسندگان [English]

  • Yaghoub Mohammadi 1
  • Mohammad Babaei 2
  • Amin Ghannadiasl 3
1 Associated Prof. Civil Engineering Department University of Mohaghegh Ardabili
2 PhD student of Structural Engineering, University of Mohaghegh Ardabili
3 Assistant Professor Department of Civil Engineering - University of Mohaghegh Ardabili
چکیده [English]

The need for adequate and appropriate living and working spaces and population density and the increasing cost of land and use of high-rise buildings requires growing research on these structures. The tube system is one of the most suitable structural systems for high-rise buildings. The purpose of this study was to obtain one of the most important dynamic properties, namely the natural frequency (ω) for a number of tall buildings with a pyramidal tube system. A tube-in-tube approximate method for analyzing and calculating the natural frequency of a combined pyramidal tube system with shear wall pyramid is presented. The size of the pyramid angle of the tube frame varies with the length (height) of the structure. The proposed method enables us to calculate the natural frequency of vertical and curved tall buildings with the help of computer programming. The models were analyzed using finite element form and mathematical analytical method. The results show that the investigated method correctly calculates the natural frequency and is in good agreement with the finite element results and has better compatibility with pyramidal angle structures with higher altitude, and the resulting computational error is much lower. The results of the proposed mathematical model provide an easy-to-use method for understanding the dynamic properties of structures and the effects of angle-frequency variations. Furthermore, this analytical method has the least error for tube systems with tube-in-tube and the highest error for shear wall pyramidal systems.

کلیدواژه‌ها [English]

  • "Pyramidal tube system"
  • "Natural frequency"
  • "Flexural stiffness"
  • "Tall building"
  • 'Tube-in-tube"

مراجع

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سابقه مقاله

  • تاریخ دریافت: 17 آذر 1398
  • تاریخ بازنگری: 12 خرداد 1399
  • تاریخ پذیرش: 09 تیر 1399

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