In this paper, the Baseline Stiffness Method (BSM) is presented to identify location and severity of damage in buildings without modal parameters from the undamaged state. The proposed method utilizes solely dynamic responses from the damaged structure and the approximate undamaged lateral stiffness of the first storey to determine a baseline model. The Independent Component Analysis method is applied to acceleration signals from instrumented damaged structures to extract modal parameters. These identified parameters are used to adjust and compare stiffness quantities with the BSM utilizing eigenvalue computations in order to detect degradation of stiffness on structural elements. This study is focused on the effect of limited modal information and level of noise on the proposed BSM for damage detection. A numerical study case from the literature is studied. Results are discussed to demonstrate the applicability of the proposed method.
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