بررسی عددی عملکرد لرزه‌ای دیوارهای برشی فولادی لاغر بدون‌سخت‌‌کننده با رویکرد پدافند غیرعامل

نوع مقاله : مقاله پژوهشی

نویسندگان

1 پژوهشگر دانشگاه جامع امام حسین(ع)، تهران، ایران

2 عضو هیات علمی دانشگاه خوارزمی، تهران، ایران

چکیده

از سال 1973 سامانه دیوار برشی فولادی به‌عنوان یک سامانه باربر جانبی مورد نظر محققان و طراحان سازه قرار گرفته است. این سامانه باربر جانبی در مقابل تهدیدات عملکرد مناسبی از خود نشان داده است. با توجه به اصل هزینه­-فایده در پدافند غیرعامل نتایج یک تحقیق روی رفتار دیوارهای برشی نشان می­دهد که سامانه دیوار برشی فولادی حدود 50 درصد در مصرف فولاد نسبت به سامانه قاب خمشی صرفه‌جویی به همراه خواهد داشت. از آنجایی که هدف پدافند غیرعامل کاهش آسیب­پذیری دارایی در مقابل تهدیدات طبیعی و انسان­ساخت است،  سامانه دیوار برشی فولادی به‌عنوان یک سامانه باربر جانبی علاوه بر سبک بودن نسبت به دیوارهای برشی بتنی از سختی و شکل‌پذیری بالایی برخوردار بوده و علاوه بر کاهش اثرات تهدید طبیعی زلزله، در مقابل تهدیدات انسان­ساخت از قبیل بمب و موشک و اثرات آن یعنی موج انفجار نیز به‌صورت مؤثر عمل خواهد کرد. با وجود کارآیی بالا هنوز این سامانه به‌صورت چشمگیر در ایران مورد استفاده قرار نگرفته است. در این مقاله، پاسخ­های گوناگون سامانه دیوار برشی فولادی لاغر بدون سخت کننده در برابر بار­های جانبی را بررسی نموده و تأثیر سه پارامتر اصلی این سامانه را مورد مطالعه قرار گرفته است. این سه پارامتر عبارتند از: نوع اتصال تیر به ستون، سختی تیر و ستون (سختی نقاط مرزی قاب) و نسبت سطح لاغری ورق (نسبت فاصله خط مرکزی ستون به ضخامت ورق).

کلیدواژه‌ها

عنوان مقاله [English]

Numerical Investigation of Seismic Performance of Thin Steel Shear Walls Without Stiffeners with Passive Defense Approach

نویسندگان [English]

  • Seyed Ehsan Abtahi 1
  • S. H. Hoseini Lavasani 2
1 Resercher-Imam hosein university
2 kharzmi univ.
چکیده [English]

Since 1973, the steel shear wall system has been considered by researchers and structural designers as a lateral resistance system. This lateral resistance system has shown good performance against threats. According to the cost-benefit principle in passive defense, the results of a study on the behavior of shear walls show that the steel shear wall system will save about 50% in steel consumption compared to the flexural frame system. Since the purpose of passive defense is to reduce the vulnerability of assets against natural and man-made threats, the steel shear wall system as a lateral bearing system, in addition to being light compared to concrete shear walls, has high hardness and ductility, and in addition to Reducing the effects of the natural threat of an earthquake will also work effectively against man-made threats such as bombs and missiles and its effects, such as blast waves. Despite its high efficiency, this system has not been used significantly in Iran. In this article, various responses of thin steel shear wall system without stiffeners against lateral resistance have been investigated and the effect of three main parameters of this system has been studied. These three parameters are: beam-to-column connection type, stiffness of the beam and column (the stiffness of the border points of the frame) and the thinness ratio of the sheet (the ratio of the distance between the center line of the column and the thickness of the sheet).

کلیدواژه‌ها [English]

  • Steel Plate Shear Wall
  • Beam-to-Column Connection
  • the Stiffness of the Beam and Column
  • Plastic Hinge

مراجع

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سابقه مقاله

  • تاریخ دریافت: 16 تیر 1400
  • تاریخ بازنگری: 29 آبان 1400
  • تاریخ پذیرش: 29 دی 1400

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