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Dynamic Bridge Substructure Condition Assessment with Hilbert-Huang Transform: Simulated Flood and Earthquake Damage to Monitor Structural Health and Security

Author(s):

Medium: journal article
Language(s): English
Published in: Transportation Research Record: Journal of the Transportation Research Board, , n. 1, v. 1892
Page(s): 153-159
DOI: 10.3141/1892-16
Abstract:

Modal vibration tests combined with the Hilbert-Huang transform (HHT) method were used to analyze previous recordings of controlled field-vibration tests of one concrete pile substructure of the Trinity River Relief Bridge No. 4 in Texas in its intact, minor-, and severe-damage states. Piles were excavated and broken to simulate flood and earthquake damage to a bridge substructure. The HHT algorithm is unique in that it reveals the quantitative difference in the instantaneous frequency of sound and damaged structures, consistent with the damage states and with what a simple structural model predicts. This approach differs from traditional modal vibration analyses in that a short-lived shift downward in resonant frequency can be seen in the HHT from a damaged member, whereas this shift is often lost due to the averaging effect of a modal vibration analysis. Accordingly, an HHT-based structural health monitoring procedure is discussed.

Structurae cannot make the full text of this publication available at this time. The full text can be accessed through the publisher via the DOI: 10.3141/1892-16.
  • About this
    data sheet
  • Reference-ID
    10778348
  • Published on:
    12/05/2024
  • Last updated on:
    12/05/2024
 
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