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- W2188376065 abstract "Damage identification of structures is always attra ctive to researchers because it plays an important role in the health monitoring in many civil enginee ring structures. When carrying out a health monitoring, sensors are usually laid on a beam to r ecord acceleration signals, in which the modes of the beam can be extracted to construct indicators f or detecting damages of the investigated beam. It should be noted that it is difficult to measure rot ational signals of the beam at a position where sensors are laid, thus only the modal translations can be available. Although the pure modal translations can still be used to construct indicat ors and often it is the case, an indicator taking i nto account modal rotations is suggested in application to consider the effect of signal noise on the accuracy of measurement. In this paper, modal rotat ions were reconstructed by modal translations using the principle of static condensation. Then b oth modal translations and rotations were used to build an indicator based on an idea regarding eleme nt modal strain energy together with the theory of data fusion. The modal translations were extract ed from accelerations recorded on a beam using stochastic subspace identification (SSI). Studies w ere carried out on choosing values of parameters in SSI in order to eliminate the effect of noise as nearly as possible. The simulation given by a FEM model and analyses of real accelerations recorded o n a reinforced concrete beam show that this proposed damage indicator with elimination of noise effects is able to determine the locations of damage in the investigated beams." @default.
- W2188376065 created "2016-06-24" @default.
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- W2188376065 date "2013-01-01" @default.
- W2188376065 modified "2023-09-27" @default.
- W2188376065 title "Damage Identification of Beams based on Element Modal Strain Energy and Data Fusion with Reconstructed Modal Rotations" @default.
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