مهندسی سازه و ساخت

مهندسی سازه و ساخت

تشخیص آسیب در تیرهای فولادی با تکیه گاه مفصلی توسط داده های پاسخ شتاب سازه

نوع مقاله : علمی - پژوهشی

نویسندگان
1 گروه مهندسی عمران،دانشکده فنی مهندسی، دانشگاه بین المللی امام خمینی، قزوین، ایران
2 گروه مهندسی عمران، دانشکده فنی مهندسی، دانشگاه بین المللی امام خمینی، قزوین، ایران
چکیده
اگر چه دقت عمل در حین ساخت سازه ها مهم است، نظارت بر سلامت سازه ها پس ازساخت، دارای اهمیت زیادی می‌باشد به طوری که شناسایی به موقع خرابی های جزئی و برنامه ریزی در خصوص بر طرف کردن آنها و اصلاح المانها در مکان های آسیب، می‌تواند از وارد شدن خرابی های کلی و تبعات جانی و مالی جلوگیری نموده و باعث افزایش عمر مفید سازه ها گردد. در تحقیقات گذشته، شناسایی آسیب در سازه ها با وجود مدل سازه ای انجام شده است. در این تحقیق به کمک شتاب خروجی سازه (بدون نیاز به مدل اولیه سازه) اقدام به شناسایی آسیب شده است. لذا بدین منظور تیر فولادی دو سر ساده در سناریوهای متفاوت تحت بارگذاری دینامیکی ضربه در یک یا چند نقطه قرار گرفته است. در استراتژی حاکم بر این تحقیق سازه آسیب دیده تحت ضربه ضعیف را سازه سالم فرض کرده و همان سازه تحت ضربه قوی به عنوان سازه آسیب دیده در نظر گرفته شده است. به کمک شتاب خروجی 3 نقطه از سازه با استفاده از تکنیک درونیابی شتاب دیگر نقاط سازه بدست آمده و همچنین به کمک روش انتگرال گیری نیومارک تغییر شکل سازه در حالت سالم و آسیب دیده استخراج گردیده و با شاخص پیشنهادی موقعیت آسیب با دقت تعیین گردیده است.
کلیدواژه‌ها

موضوعات


عنوان مقاله English

Damage detection in simply supported steel beams by structural acceleration response data

نویسندگان English

Dariush Mirhaj 1
Ramezan Ali Izadi fard 2
1 Department of Civil Engineering, Faculty of Engineering, Imam Khomeini International University, Qazvin, Iran
2 Department of Civil Engineering, Faculty of Engineering, Imam Khomeini International University, Qazvin, Iran
چکیده English

Although the accuracy of operation during the construction of structures is important, monitoring the health of structures after construction is very important, so that timely identification of minor damages and planning to eliminate them and modify elements in places Damage can prevent general damages and human and financial consequences and increase the useful life of structures. In past researches, damage identification in structures has been done with the existence of a structural model. In this research, the damage has been identified with the help of the acceleration of the structure output (without the need for the initial model of the structure). Therefore, for this purpose, the simple double-ended steel beam is subjected to dynamic impact loading in one or more points in different scenarios. In the strategy governing this research, the damaged structure under a weak impact is assumed to be a healthy structure and the same structure under a strong impact is considered as a damaged structure. With the help of the output acceleration of 3 points of the structure, using the acceleration interpolation technique of other points of the structure, and also with the help of Newmark integration method, the deformation of the structure in healthy and damaged state was extracted and the damage position was accurately determined with the proposed index.

کلیدواژه‌ها English

Damage detection
Structural health monitoring
Structural damage index
Steel beam
Impact load
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  • تاریخ دریافت 15 مهر 1403
  • تاریخ بازنگری 29 دی 1403
  • تاریخ پذیرش 17 بهمن 1403