A statistical approach for pavement layer moduli backcalculation as a function of traffic speed deflections

Mabrouk, Gamal M.; Alrashydah, E.; Masad, Ahmad; Elbagalati, Omar; Al-Sabaeei, Abdulnaser M.; Dessouky, Samer; Fuentes, Luis G.; Walubita, Lubinda F.

doi:10.1007/s41062-022-00886-w

Cited by 4 publications

(2 citation statements)

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“…According to the Euler-Bernoulli beam theory, the 2-parameter models of the pavement deflection basin y(x) and its slope y (x) are obtained respectively, and their expressions are expressed by (3). In the physical sense, the slope of the deflection basin curve y (x) is equal to the ratio of the deflection velocity V d (x) to the driving speed V , as shown in (4).…”

Section: Measuring Principle Of Road Deflection Based On Ldvmentioning

confidence: 99%

“…Earlier, instruments such as the Benkelman Beam Deflectometer (BBD) and the Falling Weight Deflectometer (FWD) were used to measure it. However, such instruments need to stop for 1-2 minutes during each test and suffer from poor safety and low efficiency [2], [3]. Currently, the focus of researchers has gradually shifted to high-speed, continuous, and non-destructive measurements [4], [5], [6].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Performance Evaluation of Traffic Speed Deflectometer Based on Virtual Standard Test Road

Luo

Jing

et al. 2023

IEEE Access

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It is challenging to find actual standard test roads (ASTRs) to evaluate the measuring performance of the Traffic Speed Deflectometer (TSD), leading to misjudgment of its evaluation results. To address this issue, a method to construct virtual standard test roads (VSTRs) using in-service roads is proposed. Firstly, the principle of TSD based on the Laser-Doppler effect to measure pavement deflection is introduced, and the shortcomings of traditional evaluation methods are reviewed and summarized. Secondly, an adaptive construction method for VSTRs is proposed based on the K-means clustering algorithm. It layers the Falling Weight Deflectometer (FWD) measurements on in-service roads and reconstructs them as virtual roads with stable deflections but different ranges. Thirdly, two new indexes, the coefficient of variation CV k and the influence coefficient of speed ICS k , are proposed to replace the traditional indexes, such as repeatability and correlation coefficient. Finally, the feasibility of evaluating TSD performance based on VSTRs and the new indexes is verified by experiments. Results show that the newly constructed VSTRs solve the problem that the ASTRs are challenging to obtain, reducing the experimental requirements for evaluating TSD, and the new indexes achieve an efficient and scientific evaluation of TSD.

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Section: Measuring Principle Of Road Deflection Based On Ldvmentioning

confidence: 99%