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- W2031198248 abstract "One of the main difficulties connected with the use of dynamic methods for damage detection in structures lies in the small sensitivity of the dynamic parameters to damage. This is an intrinsic feature of structural diagnostics based on dynamic data and represents a source of important indeterminacy, such as the strong dependence of the results of damage detection techniques on the experimental errors and on the accuracy of the structural model that is chosen to interpret measurements. These facts are nowadays well known for simple structural systems, such as single beams or frames, but still are not completely clarified for more complicated structures. In this paper we present and discuss the results of an experimental investigation on the sensitivity of modal parameters of steel-concrete composite beams with partially damaged connection. Dynamic tests were performed on two pairs of composite beams, whose connecdons have different linear densities, and four damage configurations for each beam were analyzed. Damage corresponds to a symmnetric notch of increasing depth induced by saw-cutting one end-connector of the composite beam. Natural frequencies and modal damping of the lower axial and flexural modes were assessed for the undamaged configuration and the four levels of damage. Flexural vibrating modes were assessed up to the fourth-order mode." @default.
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- W2031198248 date "2004-06-01" @default.
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- W2031198248 title "Experimental Modal Analysis of Steel Concrete Composite Beams with Partially Damaged Connection" @default.
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- W2031198248 doi "https://doi.org/10.1177/1077546304041370" @default.
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