STRUCTURAL DAMAGE QUANTIFICATION BASED ON RECURRENCE PLOTS AND RELAXATION METHOD OF PARTICLE FILTER

Summary: In this paper, chaotic excitation is proposed to vibrate the structures. The attractors reconstructed from the structural responses are used for the early-stage damage detection. After the damage is detected, it is further quantified using the Particle Filter technique. Laboratory experiment using a 4-story building subjected to chaotic excitation is carried out. The experimental results demonstrated that the proposed approach will be helpful for detecting and quantifying damage levels at the early stage for the structural health monitoring.