بررسی آئین نامه ای بار باد سازه‌های بلند مرتبه بتنی با مقطع ثابت و متغیر واقع در شهر تهران

نوع مقاله: مقاله پژوهشی

نویسندگان

1 دانشگاه قم

2 عمران-دانشکده فنی و مهندسی-دانشگاه قم

3 گروه عمران/دانشگاه قم

چکیده

امروزه با توجه به کمبود فضا و افزایش روزافزون جمعیت در شهرهای بزرگ، ساختمان­های بلند با استقبال بیشتری روبرو هستند. سازه­های بلند در برابر تاثیرات باد در راستای جهت باد و نوسانات حاصل از آن آسیب­پذیر هستند. برای طراحی یک سازه در برابر بارهای جانبی نظیر بار باد، معیار اصلی طراحی باید تامین شود. اهمیت اثر نیروی جانبی با بالا رفتن ارتفاع ساختمان افزایش می­یابد. از این رو در این نوع سازه­ها، عمدتاً تحت تاثیر نیروی باد، ملاحظات طراحی با افزایش ارتفاع، پیچیده­تر ­می­شود. در ارتفاع معینی تغییر مکان جانبی سازه­های بلند چنان افزایش می­یابد که ملاحظات سختی کنترل کننده مطرح می­گردند. ویژگی‌های فشار ناشی از  باد بر سازه تابعی از ویژگی‌های باد، هندسه سازه و مشخصات منطقه مجاور آن است. معمولاً استانداردها برای سازه‌ها و ساختمان‌هایی که دارای شکل یا موقعیت غیرمعمول هستند استفاده نمی‌شوند. هدف از پژوهش حاضر بررسی روش­های طراحی ارائه شده جهت محاسبه بار باد در استانداردهای بین­المللی و داخلی جهت بررسی سازه­های بلند با مقطع ثابت و متغیر واقع در شهر تهران است. در این پژوهش از استانداردهای امریکا، اروپا، ژاپن و استرالیا برای دو نوع سازه بلند استفاده شده و نتایج آنها با خروجی حاصل از مقررات ملی ساختمان ایران مقایسه گردیده است. نتایج این تحقیق نشان می­دهد که مقررات ملی ایران برای سازه­های مفروض که در شهر تهران درنظر گرفته شده است، نسبت به نتایج سایر استانداردهای مورد بررسی محافظه­کارانه­تر است.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Code Evaluation of Wind Loading for High-Rise Buildings with Constant and Variable Cross Section in Tehran

نویسندگان [English]

  • mohammadreza adlparvar 1
  • masud mahmoudabadi 2
  • Mohammad Hossein Taghavi Parsa 3
1 univercity qome
2 qom ac
3 Qom University
چکیده [English]

Abstract
Today, high-rise buildings are more welcomed due to the lack of space and the increasing population in large cities. The effect of wind on tall structures in the direction of the wind and its fluctuations are vulnerable. To design a structure against lateral loads such as wind load, the main design criterion should be provided. The importance of the impact of the lateral force increases with the height of the building. Thus, in this type of structures, mainly by wind power, design considerations with height, becomes more complicated. At a certain height, the lateral displacement of the longitudinal structures increases so that the controller's considerations are raised. The characteristics of the wind pressure on the structure are a function of the wind characteristics, structural geometry, and the characteristics of the adjacent region. Typically, standards for structures and buildings that have unusual shapes or positions are not used. The purpose of this study was to investigate the proposed design methods for calculating the wind load in international and domestic standards for the study of long and stable structures in Tehran. In this study, American, European, Japanese and Australian standards have been used for two types of structures, and their results have been compared to those derived from the National Building Regulations of Iran. The results of this study indicate that Iran's national regulations for proposed structures that are considered in Tehran are more conservative than the results of other standards.

کلیدواژه‌ها [English]

  • high-rise buildings
  • Lateral Load of Wind
  • Fixed andVariable Section
  • Buildings Force
  • Design Guidelines
  • Part Six (from the National Building Regulations of Iran)
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