ABSTRACT
In the last few decades, Structural Health Monitoring (SHM) systems have been gradually employed on civil engineering structures to protect them from sudden collapse. Structural Damage Detection (SDD) is one of fundamental issue of SHM. Many damage detection methods have been proposed to give accurate diagnosis. The model-based methods are widely implemented by applying finite element analysis. Loss of stiffness, mass and damping are used to simulate structural damages. SDD can be achieved by ascertaining relationship of changes between physical properties and dynamic characteristics because the associated changes will occur in the dynamic characteristics based on damage extents. Some dynamic methods, such as natural frequencies (Adams et al. 1978), mode shapes (Ren and De Roeck 2002a, Ren and De Roeck 2002b), modal strain energies (Shi et al. 2000), and other dynamic characteristics of structural system, play a major role in SDD issues.
