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- W2035597788 abstract "This technical note presents an extension of a previous study where two methods for detecting structural damage have been developed by using displacement and measurements. In this study, acceleration feedback is used in detecting changes in global structural stiffness coefficients of lumped-mass-shear-beam models. The previously developed method relies on the decoupling of effects of changes in stiffness at different locations and the use of displacement or feedback has proven to be effective. Extension to the use of acceleration feedback using existing formulation is not trivial in that the desired decoupling effect cannot be achieved by simple coordinate transformation because the acceleration itself is directly related to the stiffness coefficients. An approach to circumvent this difficulty is presented and it involves increasing the order of time derivatives of the linear system so that the acceleration becomes the velocity of the new system. The performance of the proposed method is demonstrated using an illustrative example of a three-story model with stiffness changes at different floors. Numerical studies are also conducted to evaluate the time horizons required to normalize monitor outputs for the effective and efficient detection of stiffness changes." @default.
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- W2035597788 date "2010-09-01" @default.
- W2035597788 modified "2023-10-02" @default.
- W2035597788 title "Detection of Changes in Global Structural Stiffness Coefficients Using Acceleration Feedback" @default.
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- W2035597788 doi "https://doi.org/10.1061/(asce)em.1943-7889.0000159" @default.
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