Performance assessment of time-domain damage indicators based on output-only measurement and Poincaré map: A comparative review on nonlinear structures

In view of the growing trends to explore the nonlinear dynamic behavior of a damaged structure, time-domain exhibits numerical superiority over frequency domain. Hence, a qualitative comparison on the performance of time-domain damage indicators is presented to explore their applicability in the identification of damage. The entire work is established in three steps. At first, structural members with different dynamic properties are numerically analyzed. An investigation on the benchmark structure and experimental set-up of a spring–mass system is then evaluated to summarize the performance. In addition, effect of environmental variation on the performance of evolving damage indicators is reviewed and investigated with real-time data of the Z24 bridge. In this way, the present study intends to facilitate researchers in uncovering the potential of time-domain. Some future scopes of improvement are also suggested based on the results obtained from the analysis.