Characterization of distributed cracks in concrete using randomly scattered wavefield extraction

Homin Song, John S. Popovics

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

Abstract

This paper presents a fully contactless air-coupled ultrasonic scanning approach to characterize distributed cracks in concrete. The approach enables characterization of near-surface distributed cracks in concrete, for example that caused by alkali-silica reaction or freezing and thawing action. A series of numerical simulations are performed to understand surface wave scattering phenomenon caused by distributed cracks in concrete. The numerical simulation results reveal that incident surface waves undergo complicated random scattering within the cracked region. As a result of the random scattering, local wavefields having a broad wavenumber spectrum manifest. A frequency-wavenumber (f-κ) domain signal filtering approach is applied to extract the randomly scattered wavefields set up by distributed cracks. The feasibility of the proposed approach is established using a series of experiments on laboratory-scale concrete specimens including simulated distributed cracks. The experimental wavefield data obtained by fully contactless ultrasonic scanning measurements is analyzed using the f-κ domain signal filtering approach. The experimental results demonstrate that distributed cracks in concrete can be successfully characterized and further that the the extracted scattered wavefield energy is closely related to the crack density.

Original languageEnglish (US)
Title of host publicationStructural Health Monitoring 2017
Subtitle of host publicationReal-Time Material State Awareness and Data-Driven Safety Assurance - Proceedings of the 11th International Workshop on Structural Health Monitoring, IWSHM 2017
EditorsFu-Kuo Chang, Fotis Kopsaftopoulos
PublisherDEStech Publications
Pages2178-2185
Number of pages8
ISBN (Electronic)9781605953304
DOIs
StatePublished - 2017
Event11th International Workshop on Structural Health Monitoring 2017: Real-Time Material State Awareness and Data-Driven Safety Assurance, IWSHM 2017 - Stanford, United States
Duration: Sep 12 2017Sep 14 2017

Publication series

NameStructural Health Monitoring 2017: Real-Time Material State Awareness and Data-Driven Safety Assurance - Proceedings of the 11th International Workshop on Structural Health Monitoring, IWSHM 2017
Volume2

Other

Other11th International Workshop on Structural Health Monitoring 2017: Real-Time Material State Awareness and Data-Driven Safety Assurance, IWSHM 2017
CountryUnited States
CityStanford
Period9/12/179/14/17

ASJC Scopus subject areas

  • Health Information Management
  • Computer Science Applications

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  • Cite this

    Song, H., & Popovics, J. S. (2017). Characterization of distributed cracks in concrete using randomly scattered wavefield extraction. In F-K. Chang, & F. Kopsaftopoulos (Eds.), Structural Health Monitoring 2017: Real-Time Material State Awareness and Data-Driven Safety Assurance - Proceedings of the 11th International Workshop on Structural Health Monitoring, IWSHM 2017 (pp. 2178-2185). (Structural Health Monitoring 2017: Real-Time Material State Awareness and Data-Driven Safety Assurance - Proceedings of the 11th International Workshop on Structural Health Monitoring, IWSHM 2017; Vol. 2). DEStech Publications. https://doi.org/10.12783/shm2017/14108