بررسی رفتار لرزه ای دیوار برشی فولادی کوپل با تغییرات ابعاد بازشو با در نظرگرفتن سطوح عملکرد

نوع مقاله : مقاله علمی-پژوهشی

نویسندگان

1 استادیار، گروه مهندسی عمران، دانشگاه غیر انتفاعی ایوان‌کی، سمنان، ایران

2 استادیار دانشکده عمران دانشگاه ایوانکی، سمنان، ایران

3 کارشناس ارشد، گروه مهندسی عمران، دانشگاه غیرانتفاعی ایوان‌کی، سمنان، ایران

4 گروه عمران، دانشکده مهندسی، واحد مشهد، دانشگاه آزاد اسلامی، مشهد، ایران

چکیده

دیوار برشی فولادی کوپل به دلیل تامین فضاهای بزرگ برای ایجاد کاربری­های گوناگون در طبقات و ملاحظات معماری از قبیل درها، پنجره­ها و راهروها مورد توجه طراحان قرار گرفته است. در این تحقیق، به بررسی اثر زلزله­های نزدیک و دور از گسل بر روی دو مجموعه قاب با سیستم دیوار برشی فولادی کوپل میان مرتبه پرداخته شده است. در هر دو مجموعه، سازه­ی دیوار برشی فولادی کوپل 8 طبقه با تغییرات ابعاد بازشو یکی به طول 1 متر و دیگری به طول 2 متر و عرض 0.6 متر و 0.9 متر (مجموعا تعداد 4 قاب) با منظمی در پلان در نظر گرفته شده است. سازه­ها به صورت سه بعدی در نرم­افزار ETABS طراحی و سپس قاب دو بعدی کناری در نرم­افزار OpenSees تحلیل غیرخطی شده­اند. در این تحقیق، از تحلیل­های استاتیکی غیرخطی بارافزون و دینامیکی غیرخطی تاریخچه زمانی استفاده شده است. در تحلیل­های استاتیکی غیرخطی بارافزون، برش پایه در برابر جابجایی لحاظ گردیده و در تحلیل­های دینامیکی غیرخطی تاریخچه زمانی، مقادیر تغییرمکان نسبی، مطلق، برش وارد بر طبقات و برش پایه بررسی شده است. نتایج حاصله از تحلیل­های غیرخطی گویای این مطلب است که با افزایش ابعاد بازشوها، میزان تغییرمکان نسبی و مطلق طبقات افزایش و همچنین با کاهش ابعاد بازشوها میزان برش وارد بر طبقات و برش پایه کاهش می­یابد که این مسئله نشانگر تاثیر زیاد ابعاد بازشوها بر رفتار لرزه­ای دیوار برشی فولادی کوپل با در نظرگیری سطوح عملکرد قاب می­باشد.

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