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بررسی عملکرد لرزهای میانقابهای مصالح بنایی بازشودار و بدون بازشو با در نظر گرفتن اندرکنش رفتار داخل و خارج از صفحه و ارائه ضریب کاهش سختی مؤثر و مقاومت نهایی | ||
نشریه مهندسی عمران و محیط زیست دانشگاه تبریز | ||
مقاله 7، دوره 54.1، شماره 114، خرداد 1403، صفحه 56-83 اصل مقاله (1.27 M) | ||
نوع مقاله: مقاله کامل پژوهشی | ||
شناسه دیجیتال (DOI): 10.22034/ceej.2023.53972.2194 | ||
نویسندگان | ||
دلارام استاد؛ جلیل شفائی* | ||
دانشکده مهندسی عمران، دانشگاه صنعتی شاهرود | ||
چکیده | ||
قاب با میانقاب مصالح بنایی رایجترین نوع سازهای است که برای ساخت سازههای چندطبقه در کشورهای در حال توسعه استفاده میشوند. اثر میانقاب مصالح بنایی عمدتاً باعث افزایش سختی اولیه و مقاومت ساختمانهای قاب بتن مسلح (RC) است. از سوی دیگر، بازشوهای پنجره و درب به دلایل کاربردی جزء اجتناب ناپذیر میانقابهای مصالح بنایی هستند. مشاهده آسیبهای زلزلههای گذشته نشان میدهد که، آسیب دیدگی و خسارت میانقابها در داخل صفحه و کاهش سطح تماس میانقاب و قاب پیرامونی منجر به افزایش آسیبپذیری در خارج از صفحه میانقاب میشود. در این مقاله، قابهای میانپر با بازشو با ابعاد مختلف (پنجره و درب) تحت سه بارگذاری که عبارتند از: بارگذاری خارج از صفحه، بارگذاری خارج از صفحه بعد از بارگذاری داخل صفحه، بارگذاری داخل صفحه بعد از بارگذاری خارج از صفحه، با استفاده از نرم افزار اجزا محدود ABAQUS ارزیابی شده است. تحلیلهای پوش آور غیرخطی برای هر یک از سه بارگذاری انجام شده است. بر اساس نتایج اجزای محدود موجود، معادلات تحلیلی برای به دست آوردن ضریب کاهش پیشنهاد شد. میانگین کاهش سختی میانقاب با در نظر گرفتن اندرکنش داخل صفحه و خارج از صفحه با استفاده از ضریب کاهش سختی 30 درصد محاسبه شد. | ||
کلیدواژهها | ||
میانقاب مصالح بنایی؛ بازشو؛ بارگذاری خارج از صفحه؛ بارگذاری داخل صفحه؛ روش اجزای محدود | ||
سایر فایل های مرتبط با مقاله
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مراجع | ||
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