Abstract
The purpose of this work is to distinguish between Acoustic Emission (AE)
signals coming from mechanical friction and AE signals coming from
concrete cracking, recorded during fourteen seismic simulations conducted
with the shaking table of the University of Granada on a reinforced
concrete slab supported on four steel columns. To this end, a particular
criterion is established based on the Root Mean Square of the AE waveforms
calculated in two different temporal windows. This criterion includes a
parameter calculated by optimizing the correlation between the mechanical
energy dissipated by the specimen (calculated by means of measurements
with accelerometers and displacement transducers) and the energy obtained
from the AE signals recorded by low-frequency piezoelectric sensors
located on the specimen. The final goal of this project, initiated four
years ago, is to provide a reliable evaluation of the level of damage of
Reinforced Concrete specimens by means of AE signals to be used in future
Structural Health Monitoring strategies involving RC structures.
Go to article