Effect of the Stress Dependency and Anisotropy of Unbound Granular Base and Subgrade Materials on TSD Deflection Slopes
Publication: International Conference on Transportation and Development 2024
ABSTRACT
The traffic speed deflectometer (TSD) is a mobile vehicle that utilizes Doppler laser sensors to capture pavement surface deflection velocities. These velocities are then divided by the travel speed to obtain deflection slopes, which are used in pavement management tasks. Previous studies on pavement layer moduli backcalculation using TSD have often overlooked the nonlinear stress-dependency and anisotropy of pavement layers materials. This research, employing ABAQUS finite element software, explores the impact of stress-dependency and anisotropy of unbound granular materials and fine-grained soil layers on TSD deflection slopes. Simulations of a 2D-axisymmetric pavement system, considering specific material properties and layer thicknesses under uniform tire loading, reveal a substantial difference of about 40% variation in deflection slopes when nonlinear stress-dependency is considered. Comparatively, considering an anisotropy ratio of 0.5 or higher maintains deflection slope differences around 10%, while an anisotropy ratio below 0.5 leads to a 40% variation. This study emphasizes that overlooking stress-dependency and anisotropy of pavement layers materials in analyzing TSD data in pavement layers’ backcalculation is inadequate.
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REFERENCES
Al-Qadi, I. L., Wang, H., and Tutumluer, E. (2010). “Dynamic analysis of thin asphalt pavements by using cross-anisotropic stress-dependent properties for granular layer.” Transportation Research Record, 2154(1), 156–163.
Brown, S. F., and Pappin, J. W. (1981). “Analysis of pavements with granular bases.” Transportation Research Record, 810, 17–23.
Dassault Systemes. (2022). ABAQUS. Retrieve from https://www.3ds.com/products/simulia/abaqus.
Duncan, J. M., Monismith, C. L., and Wilson, E. L. (1968). “Finite element analysis of pavements.” Highway Research Record, 228(18-33), 157.
Elbagalati, O., Mousa, M., Elseifi, M. A., Gaspard, K., and Zhang, Z. (2018). “Development of a methodology to backcalculate pavement layer moduli using the traffic speed deflectometer.” Canadian Journal of Civil Engineering, 45(5), 377–385.
Flintsch, G. W., Ferne, B., Diefenderfer, B., Katicha, S., Bryce, J., and Nell, S. (2012). “Evaluation of traffic-speed deflectometres.” Transportation Research Record, 2304(1), 37–46.
Ghadimi, B., Asadi, H., Nikraz, H., and Leek, C. (2013). “Effects of geometrical parameters on numerical modeling of pavement granular material.” Airfield and Highway Pavement 2013: Sustainable and Efficient Pavements, 1291–1303.
Gray, W. (2017). Best practice guide for pavement stabilisation August 2017., Wellington, New Zealand.
Gudishala, R. (2004). Development of resilient modulus prediction models for base and subgrade pavement layers from in situ devices test results. M.Sc. Thesis, Louisiana State University, Baton Rouge, LA.
Hicks, R. G., and Monismith, C. L. (1971). “Factors influencing the resilient response of granular materials.” Highway Research Record, 345, 15–31.
Hjelmstad, K., and Taciroglu, E. (2000). “Analysis and implementation of resilient modulus models for granular solids.” Journal of Engineering Mechanics, 126(8), 821–830.
Huang, Y. H. (2004). Pavement analysis and design, Pearson Prentice Hall, Upper Saddle River, NJ.
Katicha, S. W., Flintsch, G. W., Ferne, B., and Bryce, J. (2014). “Limits of agreement method for comparing TSD and FWD measurements.” International Journal of Pavement Engineering, 15(6), 532–541.
Kim, M. (2007). Three-dimensional finite element analysis of flexible pavements considering nonlinear pavement foundation behavior. Ph.D. Dissertation, University of Illinois at Urbana-Champaign, Champaign, IL.
Lekarp, F., Isacsson, U., and Dawson, A. (2000). “State of the art. I: Resilient response of unbound aggregates.” Journal of Transportation Engineering, 126(1), 66–75.
MacDonald, W. M. (2008). Resilient modulus and strength index properties of stabilized base for Tennessee highways. M.Sc. Thesis, University of Tennessee, Knoxville, TN.
Moffatt, M. (2017). Guide to pavement technology part 2: pavement structural design, Austroads Ltd., Sydney, Australia.
Muller, W. B., and Roberts, J. (2013). “Revised approach to assessing traffic speed deflectometer data and field validation of deflection bowl predictions.” International Journal of Pavement Engineering, 14(4), 388–402.
Nasimifar, M., Thyagarajan, S., and Sivaneswaran, N. (2017). “Backcalculation of flexible pavement layer moduli from traffic speed deflectometer data.” Transportation Research Record, 2641(1), 66–74.
NCHRP. (2004). “Mechanistic empirical design of new and rehabilitated pavement structures.”, National Research Council, Washington, D.C.
Nielsen, C. P. (2019). “Visco-elastic back-calculation of traffic speed deflectometer measurements.” Transportation Research Record, 2673(12), 439–448.
Pierce, L. M., Bruinsma, J. E., Smith, K. D., Wade, M. J., Chatti, K., and Vandenbossche, J. (2017). Using falling weight deflectometer data with mechanistic-empirical design and analysis, Volume III: Guidelines for deflection testing, analysis, and interpretation. Federal Highway Administration, U.S. Department of Transportation, Washington, D.C.
Sadd, M. H. (2009). Elasticity: theory, applications, and numerics, Academic Press, Burlington, MA.
Shahin, M. Y. (2005). Pavement management for airports, roads, and parking lots, Springer, New York, NY.
Tarefder, R. A., Ahmed, M. U., and Rahman, A. (2016). “Effects of cross-anisotropy and stress-dependency of pavement layers on pavement responses under dynamic truck loading.” Journal of Rock Mechanics and Geotechnical Engineering, 8(3), 366–377.
Uzan, J. (1976). JULEA (Jacob Uzan Layered Elastic Analysis). Technion University, Haifa, Israel.
Uzan, J. (1985). “Characterization of granular material.” Transportation Research Record, 1022(1), 52–59.
Wardle, L. (2010). CIRCLY and mechanistic pavement design: the past, present and towards the future. Mincad Systems, Australia.
Xiao, F., Xiang, Q., Hou, X., and Amirkhanian, S. N. (2021). “Utilisation of traffic speed deflectometer for pavement structural evaluations.” Measurement, 178, 109326.
Zhang, M., Xiao, R., Ma, Y., Jiang, X., Polaczyk, P. A., and Huang, B. (2023). “Evaluating structural characteristics of asphalt pavements by using deflection slopes from traffic speed deflectometer.” Construction and Building Materials, 365, 130052.
Zhang, M., Zhang, J., Gong, H., Jia, X., Xiao, R., Huang, H., and Huang, B. (2022). “Numerical investigation of pavement responses under TSD and FWD loading.” Construction and Building Materials, 318, 126014.
Zihan, Z. U., Elseifi, M. A., Icenogle, P., Gaspard, K., and Zhang, Z. (2020). “Mechanistic-based approach to utilise traffic speed deflectometer measurements in backcalculation analysis.” Transportation Research Record, 2674(5), 208–222.
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International Conference on Transportation and Development 2024
Pages: 327 - 337
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Published online: Jun 13, 2024
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