Evaluation of Deflection Errors in Traffic Speed Deflectometer Measurements on Inverted Asphalt Pavement Structures
Source abstract
Abstract
This study developed a dynamic model for the Traffic Speed Deflectometer (TSD) on inverted asphalt pavement structures. It is aimed at evaluating the deflection slope and quantifying measurement errors. First, the reliability of the ABAQUS model in simulating the dynamic response of asphalt pavements was validated by comparing with previous studies. The deflection slope curves of inverted and semi-rigid base pavements with varying thicknesses were compared, revealing that the inverted pavement exhibited complex deflection slope trends in TSD measurements. A significant decrease in peak deflection was observed at 0.15 m from the load gap center with increasing surface thickness. The deflection velocity measurement value of the TSD calibration sensor (S3500) on the inverted asphalt pavement is not zero, which causes the road surface deflection to be lower than the actual deflection, with an error as high as 80.1%, which overestimated the pavement’s structural capacity. These findings suggest that the sensor configuration and measurement strategy of TSD should be reconsidered when applied to inverted asphalt pavement structures. The results provide useful insights that may support the refinement of TSD application strategies.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Asphalt Pavement Performance Evaluation · Infrastructure Maintenance and Monitoring · Transport Systems and Technology
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Gansu Jiaojian Project Management Co., Ltd., Lanzhou 730013, China
School of Civil Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China
Funding
the Science and Technology Project of “Competitive Selection” in Transportation · Youth Science Foundation of Lanzhou Jiaotong University
References (31)
Show source-provided references
1. Finite element modeling and parametric analysis of viscoelastic and nonlinear pavement responses under dynamic FWD loading10.1016/j.conbuildmat.2017.02.096 ↗
2. Decký, M., Drusa, M., Papán, D., and Šrámek, J. (2022). The Relationship between Dynamic and Static Deformation Modulus of Unbound Pavement Materials Used for Their Quality Control Methodology. Materials, 15.10.3390/ma15082922 ↗
3. Comparing Traffic Speed Deflectometer and Falling Weight Deflectometer Data10.1177/0361198118768524 ↗
4. Integrating non-destructive testing data to produce asphalt pavement critical strains10.1080/10589759.2020.1834555 ↗
5. A study of the structural performance of flexible pavements using traffic speed deflectometer10.1520/JTE20160189 ↗
6. Mendez Larrain, M.M., Ali, S.A., Hobson, K., and Zaman, M. (2023). Calibration of Effective Structural Number and Tensile Strain Models Using Traffic Speed Deflectometer (TSD) Data for Enhanced Project-Level Assessment on Flexible and Composite Pavements. Sustainability, 15.10.3390/su152014848 ↗
7. New Relationships Between Falling Weight Deflectometer Deflections and Asphalt Pavement Layer Condition Indicators10.3141/1806-06 ↗
8. Robust Deflection Indices from Traffic-Speed Deflectometer Measurements to Predict Critical Pavement Responses for Network-Level Pavement Management System Application10.1061/(ASCE)TE.1943-5436.0000832 ↗
9. (.U. Use of Traffic Speed Deflectometer Data in Project-Level Pavement Rehabilitation Design10.1177/03611981231198844 ↗
10. Computation of Pavement Vertical Surface Deflections from Traffic Speed Deflectometer Data: Evaluation of Current Methods10.1061/JPEODX.0000025 ↗
11. Impact of dynamic loading on pavement deflection measurements from traffic speed deflectometer10.1016/j.measurement.2023.113086 ↗
12. Effect of nonlinear stress-dependency and cross-anisotropy on the backcalculation outputs from the TSD deflection slopes and the effect on estimated pavement performance10.1080/10298436.2024.2417967 ↗
13. Application Error of Traffic Speed Deflectometer for Asphalt Pavement Structure with Semi-Rigid Base
14. Fan, J., Hu, H., Ma, T., Zhang, Y., and Zhu, Y. (2024). Deflection characteristics of semi-rigid base asphalt pavement under traffic speed deflectometer loading. Road Mater. Pavement Des., 1–27.10.1080/14680629.2024.2425009 ↗
15. Characterizations of base and subbase layers for Mechanistic-Empirical Pavement Design10.1016/j.conbuildmat.2017.07.060 ↗
16. Investigation of sand mixture interlayer reducing the thermal constraint strain in asphalt concrete overlay10.1016/j.conbuildmat.2018.03.095 ↗
17. Fatigue damage numerical simulation of cement-treated base materials by discrete element method10.1016/j.conbuildmat.2020.122142 ↗
18. Reflective crack in semi-rigid base asphalt pavement under temperature-traffic coupled dynamics using XFEM10.1016/j.conbuildmat.2019.04.125 ↗
19. Analysis of inverted base pavements with thin-asphalt layers10.1080/10298436.2015.1007232 ↗
20. Effects of heavy truck braking on inverted asphalt pavement considering vehicle dynamics10.1016/j.conbuildmat.2024.134871 ↗
21. Preliminary optimization design of inverted asphalt pavement structure using response surface method10.1016/j.conbuildmat.2023.131782 ↗
22. Pedersen, L. (2013). Viscoelastic Modelling of Road Deflections for use with the Traffic Speed Deflectometer. [Ph.D. Thesis, Technical University of Denmark Kgs].
23. Numerical simulation of mechanical response analysis of asphalt pavement under dynamic loads with non-uniform tire-pavement contact stresses10.1016/j.conbuildmat.2022.129711 ↗
24. Prediction of critical strains of flexible pavement from traffic speed deflectometer measurements10.1016/j.conbuildmat.2023.134770 ↗
25. Prediction of Rutting in Flexible Pavements using Finite Element Method10.28991/cej-2021-03091727 ↗
26. Investigation and analysis of fracture failure and fatigue cracking in High-rise pavement using simulation software of ABAQUS10.29328/journal.acee.1001015 ↗
27. Predicting the rutting behaviour of natural fibre-reinforced cold mix asphalt using the finite element method10.1016/j.conbuildmat.2018.02.072 ↗
28. Analytical solutions of asphalt pavement responses under moving loads with arbitrary non-uniform tire contact pressure and irregular tire imprint10.1080/14680629.2017.1354776 ↗
29. Liu, C. (2019). Nonlinear Analysis of Inverted Asphalt Pavement. [Master’s thesis, Southwest Jiaotong University]. (In Chinese).
30. Rada, G.R., Nazarian, S., Visintine, B.A., Siddharthan, R.V., and Thyagarajan, S. (2016). Pavement Structural Evaluation at the Network Level.
31. Chen, C., Tong, X., Cheng, H., and Sun, L. (2024). A method and system for calculating asphalt pavement deflection based on Traffic Speed Deflectometer. (CN118839083A), China Patent, (In Chinese).