DAMAGE DETECTION OF BRIDGES USING THE RESPONSE POWER SPECTRAL DENSITYFUNCTION AND SENSITIVITY EQUATION
سال انتشار: 1394
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 237
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شناسه ملی سند علمی:
SEE07_442
تاریخ نمایه سازی: 29 آذر 1399
چکیده مقاله:
Structures undergo different types of loading during their lifetime. As these loads cause the performance of the structures to decay gradually, the urge of damage detection using nondestructive methods has been felt during the past two decades. In this study, a structural damage detection method is presented using measured power spectral density data. It uses the power spectral density function and the decomposed form of frequency response function to evaluate response sensitivity with respect to the change of stiffness parameters for finite element model updating. Damage is considered to be a reduction in structural stiffness parameters. For frequency domains introduced here, updated stiffness parameters are captured with high accuracy through solving the sensitivity equations by the least square approach. MATLAB software is used for the numerical analyses. The performance of this method is investigated through identifying the damage of a bridge truss structure considering different damage scenarios.
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نویسندگان
Fayaz R. ROFOOEI
Professor, Sharif University of Technology, Tehran, Iran
Akbar ESFANDIARI
Assistant Professor, AmirkabirUniversity of Technology, Tehran, Iran
Maryam GHARECHAEI
Graduate student, Sharif University of Technology, Tehran, Iran