Structural health monitoring using time-delay embedding and phase-space warping

Mohammad H. AlHamaydeh, Kenneth Wong, Ralston Fernandes, Jeongcheol Seok, Eihab M. Abdel-Rahman, Sami El-Borgi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

This paper presents a method to utilize Time-Delay Embedding (TDE) to perform structural health monitoring and obtain a damage metric that tracks deterioration in structural health over time. Proof-of-concept is demonstrated through an experimental investigation. The experimental setup consisted of high-rise building model, made of aluminium, mounted on a digitally-controlled shaker table. Floor accelerations are recorded using accel-erometers on each elevation to capture the dynamic response during the base excitation. Natural modes of vibration and their corresponding frequencies were determined experimentally using a frequency sweep of low-amplitude sinusoidal support excitations. The model building was excited at its natural frequency with moderate-amplitude sinusoidal base excitation to establish its "pristine" condition baseline. Subsequently, damage is introduced to columns on the first floor by cutting two notches at mid-height, significantly reducing their cross-sectional areas. The same base motion protocol was re-applied and acceleration data was collected and processed to detect the pre-known damage patterns as well as the total failure using changes in the oscillation orbits. The damage metric is shown to adequately detect structural damage.

Original languageEnglish
Title of host publicationCOMPDYN 2015 - 5th ECCOMAS Thematic Conference on Computational Methods in Structural Dynamics and Earthquake Engineering
PublisherNational Technical University of Athens
Pages2568-2575
Number of pages8
Publication statusPublished - 2015
Event5th ECCOMAS Thematic Conference on Computational Methods in Structural Dynamics and Earthquake Engineering, COMPDYN 2015 - Hersonissos, Crete, Greece
Duration: 25 May 201527 May 2015

Other

Other5th ECCOMAS Thematic Conference on Computational Methods in Structural Dynamics and Earthquake Engineering, COMPDYN 2015
CountryGreece
CityHersonissos, Crete
Period25/5/1527/5/15

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Keywords

  • Damage
  • Fill factor
  • Phase-space warping
  • Time-delay embedding

ASJC Scopus subject areas

  • Computers in Earth Sciences
  • Computational Mathematics
  • Geotechnical Engineering and Engineering Geology

Cite this

AlHamaydeh, M. H., Wong, K., Fernandes, R., Seok, J., Abdel-Rahman, E. M., & El-Borgi, S. (2015). Structural health monitoring using time-delay embedding and phase-space warping. In COMPDYN 2015 - 5th ECCOMAS Thematic Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (pp. 2568-2575). National Technical University of Athens.