NDLI: The influence of frequency normalisation of FWD pavement measurements on backcalculated values of stiffness moduli

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The influence of frequency normalisation of FWD pavement measurements on backcalculated values of stiffness moduli

Content Provider	Scilit
Author	Pożarycki, Andrzej Górnaś, Przemysław Wanatowski, Dariusz
Copyright Year	2017
Description	Backcalculation is commonly used for determining stiffness moduli of pavement courses and its subgrade based on in situ deflection tests. However, the in situ test results are dependent on the frequency domain, which in turn has a significant influence on the backcalculation results. In this paper, one of the methods for normalising the frequency of load and displacement functions obtained from a dynamic impulse generated by a falling weight deflectometer (FWD) test is verified. The assessment of the method is carried out based on backcalculation results of pavement deflection tests induced by both the dynamic and static loads and an independent numerical experiment. The analysis carried out in this paper shows that the normalisation of vertical displacements and pavement loads to the values corresponding to the frequency of 0 Hz improves the accuracy of the backcalculation results. It can be concluded that the frequency normalisation procedure is an effective way for standardising the boundary conditions in the backcalculation of flexible pavements.
Related Links	http://eprints.whiterose.ac.uk/122454/1/normback_final.pdf
ISSN	14680629
e-ISSN	21647402
DOI	10.1080/14680629.2017.1374991
Journal	Road Materials and Pavement Design
Issue Number	1
Volume Number	20
Language	English
Publisher	Informa UK Limited
Publisher Date	2017-09-25
Access Restriction	Open
Subject Keyword	Journal: Road Materials and Pavement Design Characterization and Testing of Materials Pavement Diagnostic Backcalculation Fwd Frequency Normalisation Deflection Stiffness Modulus
Content Type	Text
Resource Type	Article
Subject	Civil and Structural Engineering

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