بهینه یابی روش تقویتی ستون کوتاه بتنی با ورق فولادی در الگوهای شکلی مختلف به روش اجزاء محدود

نوع مقاله : مقاله پژوهشی

نویسندگان

1 مربی، گروه مهندسی عمران ، دانشکده مهندسی، دانشگاه فنی و حرفه ای، تهران، ایران

2 کارشناس ارشد مهندسی عمران گرایش سازه، دانشکده مهندسی، دانشگاه آزاد اسلامی‌‌‌ واحد سپیدان، فارس،‌ ایران

3 مربی، گروه مهندسی عمران ، دانشکده مهندسی، دانشگاه فنی و حرفه‌ای، تهران، ایران

4 استادیار، دانشکده مهندسی، دانشگاه آزاد اسلامی ‌‌واحد سپیدان، فارس، ‌ایران

چکیده

ستون‌های کوتاه در مقایسه با ستون‌های معمولی به دلیل سختی بیشتر، نیروی زلزله بیشتری را جذب می‌کنند. به همین دلیل ستون‌های کوتاه در هنگام وقوع زلزله آسیب جدی می‌بینند و بعضاً باعث تخریب کل سازه خواهند شد. وقتی ستون‌های کوتاه به اندازه ستون‌های بلند در معرض جابجایی قرار می‌گیرند، بدلیل جذب انرژی بیشتر شکست برشی و مفصلی در آن‌ها روی می‌دهد. در این تحقیق با بهره‌گیری از نتایج آزمایشگاهی یک ستون کوتاه که تحت اثر بارهای رفت و برگشتی جانبی قرار گرفته، تلاش گردید تا با کمک ورق‌های فولادی در پوشش الگوهای شکلی مختلف، بهینه‌ترین حالت آن انتخاب گردد. بدین منظور برای تعیین اثر مقاوم سازی بر روی ستون کوتاه نیز از شش حالت مختلف نصب کاور فولادی پیشنهادی در نرم افزار آباکوس برای تحلیل اجزا محدود استفاده شد. در ادامه ستون کوتاه مورد مطالعه، تحت بارگذاری چرخه‌ای رفت و برگشتی مطابق با الگوی استاندارد قرار گرفته شد. نتایج این تحقیق نشان می‌دهد که تقویت ستون کوتاه با ورق فولادی یکپارچه قادر است تا 49% مقاومت لرزه‌ای ستون را افزایش دهد اما بهینه‌ترین روش مقاوم‌سازی از نظر مقاومت و حجم فولاد مصرفی، روش تقویتی با الگوی نصب Model-2 می‌باشد.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Optimization Of The Reinforcement Method Of Short Concrete Column With Steel Sheet In Different Shape Patterns By Finite Element Method

نویسندگان [English]

  • Amirhossein Bazaee 1
  • Heydar Alidadi Tassoji 2
  • Mahmoud Reza Golshan 3
  • Roozbeh Aghamajidi 4
1 Instructor, Department Of Civil Engineering, Technical And Vocational University (TVU), Tehran, Iran
2 M.Sc. In Civil Engineering, Faculty Of Engineering, Islamic Azad University, Sepidan Unit, Fars, Iran
3 Instructor, Department Of Civil Engineering, Technical And Vocational University (TVU), Tehran, Iran
4 Assistant Professor, Faculty Of Engineering, Islamic Azad University, Sepidan Unit, Fars, Iran
چکیده [English]

Abstract
Compared to regular columns, short columns absorb more earthquake force due to their greater stiffness. For this reason, short columns are seriously damaged during an earthquake and sometimes cause the destruction of the entire structure. When short columns are displaced as much as long columns, shear and joint failure occurs in them due to the absorption of more energy. In this research, by using the laboratory results of a short column subjected to lateral reciprocating loads, an attempt was made to select the most optimal state with the help of steel sheets covered with different shape patterns. For this purpose, to determine the effect of retrofitting on the short column, six different installation modes of the proposed steel cover were used in abaqus software for finite element analysis. Next, the studied short column was subjected to reciprocating cyclic loading according to the standard pattern. The results of this research show that retrofitting a short column with an integrated steel sheet is able to increase the seismic resistance of the column by 49%, but the most optimal retrofitting method in terms of strength and volume of steel used is the retrofitting method with model-2 installation pattern.

کلیدواژه‌ها [English]

  • Retrofitting
  • Short Column
  • Steel Cover
  • Hysteresis
  • Seismic Behavior

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  • تاریخ دریافت: 18 تیر 1401
  • تاریخ بازنگری: 09 اسفند 1401
  • تاریخ پذیرش: 20 اسفند 1401

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