Detection of infill wall damage due to earthquakes from vibration data

Abstract

Vibration‐based methodologies are nowadays gaining increasing application for the structural health monitoring and damage detection on buildings, especially damage due to earthquakes. A fast and efficient damage recognition on structural and non‐structural components can support the decision‐making process after exceptional events and may contribute to reduce troubles due to the inoccupancy of buildings. The paper offers insights on the usefulness of vibration data for the damage detection in infilled frame structures starting from the tracking of the stiffness and modal properties of an infilled laboratory steel‐concrete composite mock‐up subjected to vibration‐based tests. The mock‐up has been object of an extensive experimental campaign that involved both quasi‐static cyclic and dynamic tests characterized by different level of excitation provided to the structure. Cyclic load tests are performed to simulate the effects of earthquakes by progressively increasing the imposed displacement to the cracking and then to the failure of infills. The dynamic tests are executed at the various steps to capture the effects of the infill damage on the global dynamic response triggered by excitations of different amplitudes. Results of dynamic and quasi‐static tests are used to correlate the infill damage with the mechanical properties and the modal parameters of the mock‐up, as well as with the vibration amplitude, providing information about the damage expected during low and moderate seismic events as a function of the registered dynamic response of the building by structural health monitoring systems.

Seismic Assessment of a Modernist Building in Sarajevo, Bosnia and Herzegovina

“…Nicolleti et al [8] conducted an experimental campaign on a steel-concrete composite structure with two-bay moment resisting frames, demonstrating that infills substantially enhance the longitudinal stiffness of frames. However, the activation of shear force transfer mechanisms and achievement of maximum secant stiffness require a certain level of drift.…”

Optimal Sensor Placement for Vibration-Based Damage Localization Using the Transmittance Function

“…The search domain of the optimization algorithm includes six parameters in total. The first two represent the percentage change of the Elastic Modulus and Density, p E , p D , by using Equations ( 4) and (5).…”

“…The current work focuses on vibration-based methods that rely on the fact that structural damage will affect the dynamic characteristics of a structure. Different approaches that belong in this category have been applied in the past [ 2 , 3 , 4 , 5 , 6 ], and methods that can be used in real-time scenarios have also been presented [ 7 ].…”

Numerical Simulation of the Influence of the Baihetan Reservoir Impoundment on Regional Seismicity

“…Large earthquakes often result in significant losses to human society and the economy, posing a threat to people's lives. Therefore, it is of great significance to study the possibility of earthquake occurrences and evaluate earthquake losses reasonably [15][16][17]. Consequently, there is a research priority on whether the construction of hydropower stations will induce large earthquakes in active fracture zones.…”