نویسندگان
دانشکده فنی و مهندسی، دانشگاه یاسوج، یاسوج
چکیده
مهاربند تسمه قطری یکی از پرکاربردترین سیستم‌های باربر جانبی در سازه‌های سبک فولادی است. معمولاً بعد از نصب مهاربندها در قاب‌های فولادی سرد نورد، برای پوشاندن آن از یک یا چند لایه پوشش گچی هم استفاده می‌شود. این پوشش گچی که اغلب در طراحی سازه‌ای از طرف طراحان نادیده گرفته می‌شود، می‌تواند در عملکرد لرزه‌ای سیستم تأثیر قابل توجهی بگذارد. در این مقاله ابتدا اقدام به ارائه روشی برای مدل‌سازی عددی دیوارهای برشی با مهاربند تسمه فولادی و پوشش گچی شده و سپس تأثیرات حضور پوشش گچی بر مشخصه‌ها‌ی رفتار جانبی و سطوح عملکرد لرزه‌ای دیوارهای برشی با مهار تسمه قطری بررسی شده است. نتایج این تحقیق نشان دادند، حضور پنل گچی موجب افزایش (تا 1/5 برابر) اتلاف انرژی سازه در زلزله و افزایش مقاومت و سختی آن می‌شود. همچنین دیوارهای مرکب از تسمه قطری و پوشش گچی در تغییر مکان‌های کوچک‌تری نسبت به سیستم مهاربند تنها به یک سطح عملکردی مشخص می‌رسند.
کلیدواژه‌ها
عنوان مقاله [English]
Numerical Modeling and Seismic Performance of Strap Braced Shear Walls Sheathed by Gypsum Board
نویسندگان [English]
- S. M. Seyed Sharafy
- S. Hatami
چکیده [English]
Diagonal Strap bracing is one of the most applicable lateral bracing systems in light steel framing (LSF). In practice, one or more panels of Gypsum Wall Boards (GWBs) is used for the cladding of strap braced frames. Usually, the effect of these GWBs in modelling and design is neglected by designers, but this effect can affect the seismic performance of the system In this paper, firstly, a simple numerical method is developed to model the monotonic and cyclic behavior of cold-formed strap braced shear walls together with GWBs. Then, the effects of GWB on the lateral characteristics and seismic performance levels of shear walls are evaluated. It is found that neglecting GWB in the lateral design or modeling of LSF is not rational and GWB can increase the dissipation of earthquake energy, lateral strength and stiffness of the walls. Also, the shear wall composed of strap bracing and SWBs reaches a certain performance level in a less drift ratio in comparison to to only strap braced system
کلیدواژه‌ها [English]
- Light steel framing
- Numerical modeling
- Gypsum board
- Shear wall
- Seismic performance level
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