Numerical Simulation of Rolling Dynamic Deflectometer Tests
Publication: Journal of Transportation Engineering
Volume 125, Issue 2
Abstract
The responses of typical flexible and rigid pavements to the dynamic loads imposed by the rolling dynamic deflectometer (RDD) were investigated. The RDD is a recently developed nondestructive testing vehicle that applies a steady-state harmonic force while continuously moving along the pavement. To find the pavement response to moving harmonic loads, a numerical method using the elastodynamics solution for stationary impulsive loads applied to layered media and the superposition of the effect of sequential loading impulses at different stations (spaced according to the advance velocity of the load) was implemented. The effects of RDD velocity, loading frequency, depth to bedrock, and layer stiffness on the deflection basins were investigated in the longitudinal and transverse directions. The results show that for the vehicle velocities and loading frequencies that will be used in conjunction with the RDD, dynamic effects caused by the motion of the vehicle are negligible, and the deflection basins at any instant of time essentially are the same as those that would be obtained with a stationary static or harmonic load, with the advantage to RDD testing being that the loading magnitude and loading frequency can be changed easily and that profiling is continuous along the pavement.
Get full access to this article
View all available purchase options and get full access to this article.
References
1.
Bay, J. A., and Stokoe II, K. H. ( 1998). “Development of a rolling dynamic deflectometer for pavement testing.” Geotech. Engrg. Rep. No. GD98-1, Geotechnical Engineering Center, University of Texas at Austin, Austin, Tex.
2.
Bay, J. A., Stokoe II, K. H., and Hudson, W. R. ( 1996). “Continuous highway pavement deflection measurements using a Rolling Dynamic Deflectometer.” Proc., of the Nondestructive Evaluation of Bridges and Hwys. Conf., International Society for Optical Engineering, Scottsdale, Ariz., 152–164.
3.
Bay, J. A., Stokoe II, K. H., and Jackson, J. D. ( 1995). “Development and preliminary investigation of a rolling dynamic deflectometer.” Transp. Res. Rec. Rep. No. 1473, Transportation Research Board, Washington, D.C., 43–54.
4.
Chang, D. W., Kang, Y. V., Roesset, J. M., and Stokoe II, K. H. ( 1992). “Effect of depth to bedrock on deflection basins obtained with dynaflect and FWD tests.” Transp. Res. Rec. Rep. No. 1355, Transportation Research Board, Washington, D.C., 8–16.
5.
Foinquinos, R. ( 1993). “FWD-DYN: A computer program for forward analysis and inversion of the falling weight deflection data.” Rep. No. 1070-1F, Center for Transportation Research, University of Texas at Austin, Austin, Tex.
6.
Foinquinos, R., and Roesset, J. M. ( 1995). “Dynamic nondestructive testing of pavements.” Geotech. Engrg. Rep. No. GR95-4, Geotechnical Engineering Center, University of Texas at Austin, Austin, Tex.
7.
Kausel, E. ( 1981). “An explicit solution for the Green functions for dynamic loads in layered media.” Rep. No. R81-13, Department of Civil Engineering, Massachusetts Institute of Technology, Cambridge, Mass.
8.
Kim, S. M., and Roesset, J. M. ( 1997). “Dynamic response of pavement systems to moving loads.” Geotech. Engrg. Rep. No. GR97-4, Geotechnnical Engineering Center, University of Texas at Austin, Austin, Tex.
9.
Seng, C. R., Stokoe, K. H., and Roesset, J. M. ( 1993). “Effect of depth to bedrock on the accuracy of backcalculated moduli obtained with dynaflect and FWD tests.” Rep. No. 1175-5, Center for Transportation Research, University of Texas at Austin, Austin, Tex.
Information & Authors
Information
Published In
Journal of Transportation Engineering
Volume 125 • Issue 2 • March 1999
Pages: 85 - 92
History
Received: Jan 27, 1997
Published online: Mar 1, 1999
Published in print: Mar 1999
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.