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پایش سلامت پل سگمنتال تقاطع امام خمینی (ره) کرمانشاه با استفاده از روش ماتریس نرمی بر پایه فرکانس های طبیعی | ||
| علوم و فنون سازندگی | ||
| دوره 5، شماره 3 - شماره پیاپی 16، آبان 1403، صفحه 7-22 اصل مقاله (1.83 M) | ||
| نوع مقاله: مقاله پژوهشی | ||
| نویسندگان | ||
| مهدی پرویزی* 1؛ صفدر کهریزی2 | ||
| 1گروه مهندسی عمران. دانشکده عمران و معماری. دانشگاه شهید چمران. اهواز. ایران | ||
| 2گروه مهندسی صنایع. دانشکده فنی مهندسی. دانشگاه آزاد اسلامی. کرمانشاه. ایران | ||
| تاریخ دریافت: 20 اردیبهشت 1401، تاریخ بازنگری: 10 آبان 1401، تاریخ پذیرش: 19 شهریور 1401 | ||
| چکیده | ||
| در سالهای اخیر شناسایی آسیب بر پایه ارتعاش برای ارزیابی خسارت در سازه به کار گرفته‌شده است. در این حالت تشخیص آسیب بر مبنای تغییر پاسخ دینامیکی قبل و بعد از خرابی است. در این پژوهش از روش ماتریس نرمی برای شناسایی آسیب در پلهای سگمنتال (پل تقاطع امام خمینی (ره) استفاده‌شده است. مزیت این روش، دقت و حساسیت آن به تعداد مودهای اندک برای سازههای بزرگ است. این پل در نرم‌افزار آباکوس شبیهسازی شد و پس از اعمال وزن و نیروی پیشتنیدگی در کابلها، فرکانس و اشکال مودی برای شرایط سالم و آسیب‌دیده استخراج شد. شرایط آسیب‌دیده شامل سه سناریو به‌صورت تکی (در یک مکان) و چندگانه (در چند مکان و به‌صورت هم‌زمان) در عرشه پل و همچنین اعمال آسیب در ستون بود. هرکدام از آسیبهای فوق شامل کاهش سختی معادل به‌اندازه 30 درصد بود. نتایج نشان داد که این روش قادر به تشخیص آسیبها در عرشه بود. اما برای پایش سلامت ستون، به بررسی بیشتری نیاز داشت. همچنین دقت پایش سلامت با استفاده از دو مود نیز بررسی شد که از دقت قابل‌قبولی نسبت به استفاده از 6 مود برخوردار بود. | ||
| کلیدواژه‌ها | ||
| پایش سلامت؛ ماتریس نرمی؛ پل سگمنتال؛ تحلیل مودال؛ تحلیل اجزا محدود | ||
| عنوان مقاله [English] | ||
| Health monitoring of segmental bridge of Emam Khomeini intersection of Kermanshah by flexibility matrix method based on natural frequency | ||
| نویسندگان [English] | ||
| Mehdi Parvizi1؛ Safdar Kahrizi2 | ||
| 1Civil and architect faculty. Chamran university, Ahvaz. Iran | ||
| 2Engineering faculty. Islamic Azad university, Kermanshah. Iran | ||
| چکیده [English] | ||
| In recent years, vibration-based damage detection has been used to assess damage to structures. In this case, damage detection is based on changing the dynamic response before and after damage. In this research, the flexibity matrix method has been used to identify damage in segmental bridge (Imam Khomeini intersection bridge). The advantage of this method is its accuracy and sensitivity to a small number of modes for large structures. The bridge was simulated in Abacus software and after applying weight and prestressing force to the cables, the frequency and modal shapes were extracted for healthy and damaged conditions. Damaged conditions included three scenarios, single (in one place) and multiple (in several places and simultaneously) on the bridge deck as well as damage to the column. Each of the above damages involved a 30% reduction in stiffness. The results showed that this method was able to detect damages in the deck. But more investigation was needed to monitor the health of the column. The accuracy of health monitoring was also assessed using two modes, which had acceptable accuracy compared to the use of 6 modes. | ||
| کلیدواژه‌ها [English] | ||
| Health monitoring, Flexibility matrix, Segmental bridge, Modal analysis, Finite element analysis | ||
| مراجع | ||
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آمار تعداد مشاهده مقاله: 206 تعداد دریافت فایل اصل مقاله: 237 |
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