The research described in this paper focuses on the application of modal strain techniques on a multi-girder bridge superstructure with the objectives of identifying the presence of damage and detecting false damage diagnosis for such structures. The case study is a one-third scale model of a slab-on-girder composite bridge superstructure, comprised of a steel-free concrete deck with FRP rebars...

The number of bridges in operation has increased. Along with the increase length time are service, structural safety also decreases. Bridge substructure is a key component bridges, but there few studies on management and identification water bridge damage. Deep learning focus research field target detection, this document lightens YOLO-v4 to achieve precise intelligent determination concrete cr...

Civil infrastructures such as bridges and buildings are prone to damage as a result of natural disasters. To understand damages induced by these events, the structure needs to be monitored. The field of engineering focusing on the process of evaluating the location and the intensity of the damage to the structure is called Structural Health Monitoring (SHM). Early damage prognosis in structures...

The identification of damage in structural systems, including characterization of damage location and severity, is of extreme interest to the structural engineering profession. To date, many damage detection methods have been proposed that utilize global structural response measurements in the time and frequency domains to hypothesize the existence of structural damage. The accuracy and robustn...

The feed-forward relationship between diagnosis and prognosis is the foundation of both aircraft structural health management and the digital twin concept. Measurements of structural response are obtained either in-situ with mounted sensor networks or offline using more traditional techniques (e.g., nondestructive evaluation). Diagnosis algorithms process this information to detect and quantify...

Damage diagnosis based on global structural vibrations critically depends the sensor layout, in particular when a small number of sensors is used for large structures under unknown excitation. This paper proposes placement strategy that yields an optimized layout with maximum damage detectability selected components. The optimization criterion Fisher information, which quantifies information da...