Measuring acoustoelastic coefficients for stress evaluation in concrete

Bibo Zhong, Jinying Zhu, George Morcous

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

This paper presents experimental studies to evaluate stress levels in concrete based on the acoustoelastic effect. Direct P wave interferometry (DPWI) was introduced to calculate the relative P wave velocity change and acoustoelastic coefficients by analyzing the direct P wave part signal only. Two laboratory experiments were performed on a concrete cylinder and a concrete beam, and a full-scale test was conducted on a 40-meter-long prestressed concrete bridge girder. The DPWI method provides a relatively high resolution and shows different acoustoelastic coefficients in the stressed and the unstressed directions. This property may be used to evaluate the stress level in existing prestressed concrete structures by comparing the velocity difference in different stress directions.

Original languageEnglish (US)
Article number125127
JournalConstruction and Building Materials
Volume309
DOIs
StatePublished - Nov 22 2021

Keywords

  • Acoustoelastic effect
  • Coda wave interferometry (CWI)
  • Non-destructive testing
  • Prestress
  • Ultrasonic

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Materials Science(all)

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