TY - JOUR
T1 - Recovery of the resonance frequency of buildings following strong seismic deformation as a proxy for structural health
AU - Astorga, Ariana Lucia
AU - Guéguen, Philippe
AU - Rivière, Jacques
AU - Kashima, Toshihide
AU - Johnson, Paul Allan
N1 - Publisher Copyright:
© The Author(s) 2019.
PY - 2019/11/1
Y1 - 2019/11/1
N2 - Elastic properties of civil engineering structures change when subjected to a dynamic excitation. The modal frequencies show a rapid decrease followed by a relaxation, or slow recovery, that is dependent on the level of damage. In this article, we analyze the slow recovery process applying three relaxation models to fit real earthquake data recorded in a Japanese building that shows variant structural state over 20 years. Despite the differences in conditions, the different scales and the complexity of a real-scale problem, the models originally developed for laboratory experiments are well adapted to real building data. The relaxation parameters (i.e. frequency variation, recovery slope, characteristic times and their amplitudes, and range of relaxation times) are able to characterize the structural state, given their clear connection to the degree of fracturing and mechanical damage to the building. The recovery process following strong seismic deformation, could, therefore, be a suitable proxy to monitor structural health.
AB - Elastic properties of civil engineering structures change when subjected to a dynamic excitation. The modal frequencies show a rapid decrease followed by a relaxation, or slow recovery, that is dependent on the level of damage. In this article, we analyze the slow recovery process applying three relaxation models to fit real earthquake data recorded in a Japanese building that shows variant structural state over 20 years. Despite the differences in conditions, the different scales and the complexity of a real-scale problem, the models originally developed for laboratory experiments are well adapted to real building data. The relaxation parameters (i.e. frequency variation, recovery slope, characteristic times and their amplitudes, and range of relaxation times) are able to characterize the structural state, given their clear connection to the degree of fracturing and mechanical damage to the building. The recovery process following strong seismic deformation, could, therefore, be a suitable proxy to monitor structural health.
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U2 - 10.1177/1475921718820770
DO - 10.1177/1475921718820770
M3 - Article
AN - SCOPUS:85059908194
SN - 1475-9217
VL - 18
SP - 1966
EP - 1981
JO - Structural Health Monitoring
JF - Structural Health Monitoring
IS - 5-6
ER -