THE BASELINE STIFFNESSES METHOD FOR DAMAGE IDENTIFICATION WITHOUT BASELINE MODAL PARAMETERS AND DAMAGE ASSESSMENT OF A REINFORCED CONCRETE BUILDING

摘要

In this paper the Baseline Stiffnesses Method, BSM, is proposed to identify damage in buildings without knowing their undamaged state. The method is aimed at determining stiffness degradation of structural elements in buildings without knowing baseline modal parameters. To compute a reference state, the BSM utilizes based on eigenvalue calculations, solely, modal information from the damaged system and the approximated lateral stiffness from its first storey. This reference state is compared to the damaged one to detect and measure severity of damage. The proposed method is applied to two structures for both simulated and real damage. Results are analyzed and the advantages of using the proposed method are discussed.