Non-destructive evaluation of rigid pavements using surface wave tests

Gohil, RR and Samu, V and Kumar, J (2024) Non-destructive evaluation of rigid pavements using surface wave tests. In: Construction and Building Materials, 442 .

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Abstract

Non-destructive evaluation of rigid pavements is of critical importance from quality assurance as well as maintenance perspective. This research is aimed at providing a framework for surface wave testing of rigid pavements by studying their dispersion characteristics and developing a strategy to back-compute upper as well as lower layers' properties. Multichannel analysis of surface waves (MASW), and multichannel simulation with one receiver (MSOR) methods, using the impact of a lightweight hammer (weight 2�10 N), have been employed to analyse the data obtained from field tests carried out on a National Highway rigid pavement site. The procedure involves (i) generating first a dispersion image by conducting field tests, (ii) a forward analysis to establish the predominant dispersion curve (PDC) for a known pavement layered system based upon the semi-analytical complex length finite element (FE) approach, and (iii) performing subsequently a genetic algorithm (GA) based inversion analysis to back compute the moduli and thicknesses of different layers. It is observed that, as compared to the lower layers, the upper layers have a much more significant effect on the dispersion curve. Based on the parametric study, a two-step inversion strategy has been proposed to predict the properties of the upper and lower layers. It is noted that the elastic modulus and thickness of the concrete (upper) layer are estimated quite accurately, and the properties of the deeper (lower) layers are also found to be quite acceptable. The obtained pavement layered profile for the chosen site was subsequently analysed by carrying out an axisymmetric finite element (FE) analysis to simulate the falling weight deflectometer (FWD) test and determine the vertical deflection profile at the pavement surface. The predicted deflection profile from the FE analysis compared well with that measured using the FWD test. The overall methodology, including the testing, analysis and the inversion procedure, can be extended to any type of rigid pavement system to evaluate its layers' properties. © 2024 Elsevier Ltd

Item Type:	Journal Article
Publication:	Construction and Building Materials
Publisher:	Elsevier Ltd
Additional Information:	The copyright for this article belongs to the publisher.
Keywords:	Dispersion (waves); Finite element method; Genetic algorithms; Pavements; Petroleum reservoir evaluation; Quality assurance; Quality control; Surface waves; Well testing, Dispersion curves; Field test; Multi-channel analysis of surface waves; Multichannel simulation with one receivers; Non destructive evaluation; Property; Rigid pavements; Surface wave test; Upper layer; Wave test, Nondestructive examination
Department/Centre:	Division of Mechanical Sciences > Civil Engineering
Date Deposited:	08 Oct 2024 08:40
Last Modified:	08 Oct 2024 08:40
URI:	http://eprints.iisc.ac.in/id/eprint/86375

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