SHM-Based Structural Deterioration Assessment

Supervised damage and deterioration detection in building structures using an enhanced autoregressive time-series approach

“…One of the most common techniques is the Random Decrement Technique (RDT), which is used to estimate cross-correlation functions and free-response decays [17]. Secondly, forced vibration tests may require enormous force-generating instruments to produce significant and useful response amplitudes [1]. Additionally, due to the high-cost burden of generating vibration in existing structures, and anticipated hazards, the application of low-cost ambient vibration tests has increased during recent years [18][19][20][21][22][23].…”

“…Structural Health Monitoring (SHM) provides valuable information regarding the behavior of structure by construing the responses, detecting damages, and evaluating the current state. It is worth to note that it was first exploited on behalf of damage diagnosing in the aerospace industries and, after that, penetrated into offshore platform structures [1]. Following that, in the late 1970s, it was similarly practiced in various types of civil engineering structures [1].…”

“…It is worth to note that it was first exploited on behalf of damage diagnosing in the aerospace industries and, after that, penetrated into offshore platform structures [1]. Following that, in the late 1970s, it was similarly practiced in various types of civil engineering structures [1]. As a concise definition, Farrar and Sohn [2] defined SHM as a process of implementing a damage identification strategy in respect of utilization in different structures.…”

“…The sooner and more accurate this evaluation is done, the lower the cost of maintenance in the future will be. [1] Damage detection can be carried out by either using models or signal analysis. In a model-based approach, the damage is identified by tracking changes in the simulated measurements from the structural models [5].…”

“…In other words, in model-based problems, specific parameters of a finite element model (FEM) are updated in order to identify damage [7][8][9][10]. However, these methods have some restitutions, such as requiring prior information concerning boundary conditions, damage location, or material properties [1]. Additionally, an optimization problem is prone to ill-conditioning, meaning that the existence, uniqueness, and stability of a solution of the inverse problem cannot be guaranteed.…”