Influence of Cracking Damage on Deflection Basin Test Data of FWD

Xin Qiu; Xiao Hua Luo; Qing Yang

doi:10.4028/www.scientific.net/KEM.620.55

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HomeKey Engineering MaterialsKey Engineering Materials Vol. 620Influence of Cracking Damage on Deflection Basin...

Influence of Cracking Damage on Deflection Basin Test Data of FWD

Abstract:

With the popularization of falling weight deflectometer (FWD) to calculate the stiffness related parameters of the pavement structures, non-destructive evaluation of physical properties and performance of pavements has taken a new direction. FWD backcalculation is mathematically an inverse problem that could be solved either by deterministic or by probabilistic approach. A review of the currently used backcalculation procedures indicates that the calculation is generally based on a homogeneous, continuous, and linear elastic multi-layer system. Identifying effective data of dynamic deflection basins seems to be an important task for performing modulus backcalculation. Therefore, the main objective of this paper was to discuss the distribution features of dynamic deflection basins of asphalt pavements with crack distresses, and present the reasonable criteria to filter the testing data of FWD deflection basins. Finally, the study aims to validate the established criteria by conducting in-situ case study.

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Periodical:

Key Engineering Materials (Volume 620)

Pages:

55-60

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.620.55

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Online since:

August 2014

Authors:

Xin Qiu, Xiao Hua Luo, Qing Yang

Keywords:

Back Analysis, Data Diagnosis, Falling Weight Deflectometer, Modulus Parameter

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