Composite Multiscale Cross-Sample Entropy Analysis for Long-Term Structural Health Monitoring of Residential Buildings
Open Access
- 31 December 2020
- Vol. 23 (1), 60
- https://doi.org/10.3390/e23010060
Abstract
This study proposesd a novel, entropy-based structural health monitoring (SHM) system for measuring microvibration signals generated by actual buildings. A structural health diagnosis interface was established for demonstration purposes. To enhance the reliability and accuracy of entropy evaluation at various scales, composite multiscale cross-sample entropy (CMSCE) was adopted to increase the number of coarse-grained time series. The degree of similarity and asynchrony between ambient vibration signals measured on adjacent floors was used as an in-dicator for structural health assessment. A residential building that has been monitored since 1994 was selected for long-term monitoring. The accumulated database, including both the earthquake and ambient vibrations in each seismic event, provided the possibility to evaluate the practicability of the CMSCE-based method. Entropy curves obtained for each of the years, as well as the stable trend of the corresponding damage index (DI) graphs, demonstrated the relia-bility of the proposed SHM system. Moreover, two large earthquake events that occurred near the monitoring site were analyzed. The results revealed that the entropy values may have been slightly increased after the earthquakes. Positive DI values were obtained for higher floors, which could provide an early warning of structural instability. The proposed SHM system is highly stable and practical.Keywords
This publication has 22 references indexed in Scilit:
- Time Series Analysis Using Composite Multiscale EntropyEntropy, 2013
- A bio-inspired structural health monitoring system based on ambient vibrationSmart Materials and Structures, 2010
- Multiscale entropy analysis of biological signalsPhysical Review E, 2005
- Review Paper: Health Monitoring of Civil InfrastructureStructural Health Monitoring, 2003
- HEALTH-MONITORING METHOD FOR BRIDGES UNDER ORDINARY TRAFFIC LOADINGSJournal of Sound and Vibration, 2002
- Multiscale Entropy Analysis of Complex Physiologic Time SeriesPhysical Review Letters, 2002
- STRUCTURAL HEALTH MONITORING USING TRANSMITTANCE FUNCTIONSMechanical Systems and Signal Processing, 1999
- Randomness and degrees of irregularity.Proceedings of the National Academy of Sciences, 1996
- A regularity statistic for medical data analysisJournal of Clinical Monitoring and Computing, 1991
- A Mathematical Theory of CommunicationBell System Technical Journal, 1948