بررسی اثر ستون متکی در برآورد پاسخ‌های دیوارهای پایه-گهواره‌ای مرکزگرا تحت رکوردهای حوزه دور و نزدیک گسل | ||
| پژوهش های زیرساخت های عمرانی | ||
| دوره 8، شماره 2 - شماره پیاپی 15، اسفند 1401، صفحه 145-156 اصل مقاله (2.11 M) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22091/cer.2022.7994.1373 | ||
| نویسندگان | ||
| اسماعیل محمدی ده‌چشمه؛ وحید بروجردیان* | ||
| دانشکده مهندسی عمران، دانشگاه علم و صنعت ایران. | ||
| چکیده | ||
| در این تحقیق به بررسی اثر ستون پی-دلتا (ستون متکی) در پاسخ قاب‌های ثقلی دارای سیستم باربر جانبی دیوار پایه-گهواره‌ای پرداخته است. سازه‌های مورد بررسی دارای تعداد طبقات 4، 8، 12، 16 و 20 طبقه هستند. رفتار دینامیکی غیرخطی تحت 22 رکورد لرزه‌ای دور و 28 رکورد لرزه‌ای نزدیک گسل که نیمی از آن‌ها دارای پالس هستند، در نرم‌افزار OpenSees انجام شده است. رکوردهای موردنظر در دو سطح DBE و MCE مقیاس شده و به سازه اعمال میشوند. مدل‌سازی به‌صورت دو‌بعدی انجام‌گرفته است. در این تحقیق نشان داده‌شده است که 1) اثر مودهای بالاتر با افزایش شدت زلزله افزایش می‌یابد، 2) اثرات مودهای بالاتر به صورت افزایش خمش و برش در دیوار در رکوردهای دور و نزدیک گسل بدون پالس بیشتر قابل مشاهده است، 3) جابجایی‌های پسماند در دو سطح زلزله مورد بررسی ناچیز و قابل صرف نظر است، 4) ستون پی-دلتا بیشتر در سازه‌ها تحت رکوردهای نزدیک گسل دارای پالس موثر بوده است، 5) حداکثر اثر ستون پی-دلتا در افزایش لنگر خمشی دیوار تحت زلزله نزدیک گسل دارای پالس است که مقدار آن 12 درصد است و 6) به صورت کلی اثر ستون پی دلتا در سازه‌های دیوار پایه-گهواره‌ای به صورت ویژه دیوارهای گام بردارم قابل صرف نظر است. | ||
| کلیدواژه‌ها | ||
| سیستم مرکزگرا؛ دیوار گهواره‌ای؛ تغییر شکل پسماند؛ اثر ستون پی-دلتا؛ اثر مودهای بالاتر | ||
| عنوان مقاله [English] | ||
| Investigation of the Leaning Column Effect on Estimating of the Responses of Self-Centering Base-Rocking Walls under Far and Near Field Ground Motions | ||
| نویسندگان [English] | ||
| Esmaeil Mohammadi Dehcheshmeh؛ Vahid Broujerdian | ||
| Iran University of Science and Technology, Tehran, Iran. | ||
| چکیده [English] | ||
| In this research, the effect of P-Delta column (leaning column) on the response of gravitational frames with lateral-load resistance system of base-rocking wall has been investigated. The studied structures have 4-, 8-, 12-, 16-, and 20-stories. Nonlinear dynamic behavior is performed under 22 far-field seismic records and 28 near-field seismic records, half of which are pulse-like, via OpenSees software. The ground motions are scaled at both DBE and MCE levels and applied to the structure. The modeling is done in two dimensions. As a results, it has been shown that 1) the higher modes effect increases with increasing earthquake intensity, 2) the higher modes effect are more visible in the records of far-field and near-field-non pulse-like, 3) residual displacements in The both earthquake levels studied are insignificant and negligible, 4) P-Delta column has been more effective in structures under near-field-pulse-like records, 5) The maximum effect of P-Delta column in increasing the moment of wall under near-field-pulse-like earthquake that the value is 12%, and 6) In general, the effect of the P-Delta column on the base-rocking wall structures in especially the stepping-wall can be ignored. | ||
| کلیدواژه‌ها [English] | ||
| Self-centering system, Rocking wall, Residual displacement, Leaning column effect, Higher mode effect | ||
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سایر فایل های مرتبط با مقاله
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| مراجع | ||
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