Dynamic Responses of a Rough Road Comprising Dry and Saturated Layers Subjected to Moving-Vibratory Elliptical Traffic Load: Insights from a Gmm-Based Semi-Analytical Solution
Abstract
This paper presents a novel semi-analytical solution to dynamic responses of road system under moving-vibratory traffic load. In the proposed solution, the road system is appropriately taken as a multilayered system composed of the asphalt layer, subgrade layer, shallow dry subsoil layer and the underlying saturated subsoil. The traffic load propagated from the tire is represented by a moving-vibratory elliptical uniform load to account for the effects of pavement roughness. Taking advantage of the basic solutions developed for the single dry layer and saturated layer based on Fourier transformation technique, the governing matrix function for the problem considered is assembled by the robust global matrix method (GMM), which comprehensively integrates the moving traffic load boundary condition, the continuity conditions between the different layers and the infinite depth condition of the half-space. The time-domain dynamic response is finally achieved by using the composite Gauss-Legendre integral method. The proposed solution is validated through comparing with well-established solutions. Extensive parametric analyses are performed to investigate the dynamic amplification effects of the traffic load on each layer. Particular attention is paid to explore the effects of stiffness and thickness of subgrade on the dynamic responses of the multilayered road system. The newly developed solution yields more reasonable dynamic responses of the road system under the traffic load, which provides a useful tool for dynamic design and assessment of road system.
Recommended Citation
P. Ren et al., "Dynamic Responses of a Rough Road Comprising Dry and Saturated Layers Subjected to Moving-Vibratory Elliptical Traffic Load: Insights from a Gmm-Based Semi-Analytical Solution," Computers and Geotechnics, vol. 172, article no. 106403, Elsevier, Aug 2024.
The definitive version is available at https://doi.org/10.1016/j.compgeo.2024.106403
Department(s)
Geosciences and Geological and Petroleum Engineering
Keywords and Phrases
Dynamic responses; Global matrix method; Moving-vibratory load; Multilayered road system; Pavement roughness
International Standard Serial Number (ISSN)
1873-7633; 0266-352X
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2024 Elsevier, All rights reserved.
Publication Date
01 Aug 2024
Comments
Fundamental Research Funds for the Central Universities, Grant 52108297