Finding damage in truss structures exploiting modal strains

Abstract. The detection of potentially damaged elements in planar truss structures is a challenging task. Among the different methods proposed literature, one promising procedure exploits modal strains structure that are calculated from flexibility matrix, which is, turn, estimated lowest frequencies and corresponding modes vibration. benefit this approach stems possibility using reduced number mode shapes, usually available dynamic monitoring to perform damage detection. In work, novel index based on proposed, its reliability detecting stiffness reduction tested numerically.