نوع مقاله : علمی - پژوهشی
نویسندگان
1 دانشجوی کارشناسی ارشد، دانشکده مهندسی عمران، دانشگاه یزد، یزد، ایران
2 دانشیار، دانشکده مهندسی عمران، دانشگاه یزد، یزد، ایران
3 استادیار، دانشکده مهندسی عمران، دانشگاه یزد، یزد، ایران
چکیده
کلیدواژه‌ها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
The phenomenon of damage in structures causes a change in the mass, stiffness and damping properties of the structure. As a result, the static and dynamic responses of the structure also change and therefore by using the responses of the structure, damage can be identified in the structure. In this article, a two-step method is introduced to identify the damage of structures under variable ambient temperature conditions. First, the principal components method has been used to extract the effect of ambient temperature from the obtained structural responses. In the first stage, various damage indices, which include the modal strain energy, frequency response function strain energy dissipation ratio and flexibility strain energy damage ratio, have been calculated. Then the Bayesian data fusion method has been applied to find the location of damage for these three indicators. The proposed method has significantly reduced the number of suspected damaged elements. In the second stage, the modal response of the structure is used and subsequently updated by multi-trial vector-based differential evolution to estimate the damage extents of the suspected elements. The results obtained from the analysis of two numerical examples show the high accuracy and fast convergence rate of the objective functions using the proposed method.
کلیدواژه‌ها [English]
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