Al-Shayea, NA

King Fahd University of Petroleum and Minerals

 
 
Nondestructive testing of concrete structures using the Rayleigh wave dispersion 
method 
Krstulovic-Opara, N., Woods, R.D.,Al-Shayea, N. 
ACI Materials Journal 
Vol. 93, Issue.1, 1996 
 
 
Abstract:  This paper presents the Rayleigh wave dispersion method, which shows great 
potential for nondestructive testing (NDT) of concrete structures. Its application allows 
both the determination of stiffness profiles within a structural element and monitoring of 
concrete curing as a function of time and depth. The method constitutes an improvement 
over conventional stress-wave techniques used in NDT of concrete structures that are 
capable of determining only average wave velocity along a specific path. Thus, 
conventional methods can neither evaluate changes in material qualities (e.g., stiffness) 
with depth, nor the position of defects within a layered section. This novel method, also 
called the spectral analysis of surface waves (SASW) method, is based on the generation 
of low-amplitude Rayleigh waves at a broad range of frequencies from which shear wave 
velocities and elastic moduli profiles are determined. The method was developed 
primarily for determining stiffness profiles and thicknesses of "larger" layered systems 
that satisfy conditions for an infinite half-space, such as layered soils. Nevertheless, the 
method has already been successfully used in flexible pavements and concrete elements 
satisfying conditions for an infinite half-space, such as concrete tunnel liners. This 
suggests that the SASW method could be successfully employed for NDT of other 
concrete elements. The goal of the reported research was to evaluate if this method could 
be used for NDT of concrete structural elements that do not satisfy conditions for an 
infinite half-space. Presented in this paper are basic concepts of the SASW method, 
results of a nondestructive evaluation of a model concrete wall using the SASW method, 
and directions for future research. 


Nondestructive testing of concrete structures using the Rayleigh wave dispersion method

https://eprints.kfupm.edu.sa/id/eprint/9370/1/abs_Shayea_jp_13.pdf

Nondestructive testing of concrete structures using the Rayleigh wave dispersion method

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