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فصلنامه علمی کارافن

بررسی عددی رفتار لرزه ای دیوار برشی مرکب متشکل از ورق فولادی و پوشش بتن مسلح

نوع مقاله : مقاله پژوهشی (کاربردی)

نویسندگان
1 دانشجوی کارشناسی ارشد سازه، گروه مهندسی عمران، دانشکده فنی مهندسی، دانشگاه رازی، کرمانشاه، ایران.
2 استادیار، گروه مهندسی عمران، دانشکده فنی مهندسی، دانشگاه رازی، کرمانشاه، ایران.
چکیده
دیوار برشی مرکب متشکل از ورق فولادی به همراه پوشش بتن مسلح، یکی از رایج ترین سیستم‌‏های مقاوم در برابر بارهای جانبی، در سازه‏‌های بلند‏ می‌‏باشد. هدف اصلی در این تحقیق بررسی اثر پوشش بتن مسلح، ضخامت ورق فولادی و بازشوی درب و پنجره بر رفتار لرزه‌ای قاب فولادی دارای این نوع دیوار برشی است. برای این منظور در تحقیق حاضر، پس از اعتبار سنجی مدلسازی عددی، 19 نمونه‌ی دیوار برشی فولادی مرکب با ارتفاع 3/5 متر و طول دهانه 5 متر مدلسازی می‌شود. نتایج این تحقیق نشان می‌دهد که مقاومت نهایی، سختی، انرژی مستهلک شده و شکل پذیری در نمونه‌ با پوشش بتن مسلح و بدون بازشو و دارای ورق با ضخامت 15 میلی‌متر، به ترتیب 12/24، 63/78، 7/82 و 4/37 برابر نمونه مرجع و در نمونه مشابه بدون پوشش بتن مسلح این مقادیر به ترتیب 8، 61/04، 4/46 و 6/24 برابر نمونه مرجع است. به عبارت بهتر، پوشش بتن مسلح به دلیل جلوگیری از کمانش ورق فولادی در اثر نیروی فشاری، سبب افزایش مقاومت نهایی، انرژی مستهلک شده و شکل‌پذیری شده است. همچنین در نمونه‌های دارای پوشش بتن مسلح، افزایش ضخامت ورق فولادی از 10 به 15 میلیمتر، تاثیر چندانی بر روی مقاومت نهایی ندارد.
کلیدواژه‌ها
موضوعات

عنوان مقاله English

Numerical Study of the Seismic Behavior of a Composite Shear Wall Consisting of Steel Sheet and Reinforced Concrete Cover

نویسندگان English

Hadis Hosaini 1
Ebrahim Khalilzadeh Vahidi 2
1 M.Sc Student in Structure Engineering, Department of Civil Engineering, Faculty of Engineering, Razi University, Kermanshah, Iran.
2 Assistant Professor, Department of Civil Engineering, Faculty of Engineering, Razi University, Kermanshah, Iran.
چکیده English

A composite shear wall consisting of a steel sheet with a reinforced concrete cover is one of the most common systems resistant to lateral loads in tall structures. The main purpose of this study was to investigate the effect of reinforced concrete cover, steel sheet thickness, and door and window opening on the seismic behavior of steel frames with composite shear walls. For this purpose, in the present study, after validation of numerical modeling, 19 specimens of composite steel shear walls with a height of 3.2m and a span length of 5m were modeled. The results of this study show that the ultimate strength, stiffness, dissipated energy, and ductility in the model with a reinforced concrete cover without opening and with a steel sheet with a thickness of 15 mm, were respectively 12.24, 63.78, 7.82, and 4.37 times the reference model and in the same model without reinforced concrete cover, these values ​​were correspondingly 8, 41.61, 4.46 and 6.24 times the reference model. In other words, due to the prevention of buckling of the steel sheet as a result of compressive force, the reinforced concrete cover increased the ultimate strength, dissipated energy, and ductility. In addition, in the reinforced concrete cover, increasing the thickness of the steel sheet from 10 to 15 mm had little impact on the ultimate strength.

کلیدواژه‌ها English

Composite Shear Wall
Seismic Behavior
Ultimate Strength
Hardness
Dissipated Energy
Ductility
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دوره 20، شماره 1 - شماره پیاپی 61
فنی و مهندسی
بهار 1402
صفحه 389-408

  • تاریخ دریافت 27 بهمن 1400
  • تاریخ بازنگری 11 خرداد 1401
  • تاریخ پذیرش 04 تیر 1401