Damage detection in structures using frequency response functions ensemble with extended cosine based indicator

Abstract

Although extensive investigations exist for structural damage detection, which often solely considers the stiffness reduction, or specific damage type like concrete spalling, this study aims to address a general novelty detection procedure for detecting the novelty, or so-called outlier from structural dynamic analysis with applying cosine based indicator in frequency response functions. This study also addresses a short review for the cosine indicator and modal assurance criterion, and their interrelation as well. The eight degree-of-freedom system is considered for the verification, and proves well performance in novelty detection. @ Published under licence by IOP Publishing Ltd.