3D simulation of deflection basin of pavements under high-speed moving loads


The nondestructive testing of pavements currently has become more focused on continuous deflection profiles and vehicle moving speeds, which are recognized to be critical in obtaining complete and accurate pavement responses and conditions. However, current techniques cannot produce satisfactory results in terms of continuous deflection profiles at high-speed moving loads. Under this circumstance, the computational simulation is a good alternative. The objective of this study is to utilize the three-dimensional (3D) finite element (FE) analysis to investigate the characteristics of deflection basins of pavements under high-speed moving loads. Specifically, a 3D FE pavement model is constructed with six sets of pavement materials representing six types of pavements and four moving speeds (24 km/h, 40 km/h, 64 km/h, and 80 km/h). The results demonstrate that the deflection basin of a pavement exhibits an asymmetric shape under a high-speed moving load. It also reveals that there is a time lag between the maximum deflection and the center of the load in flexible pavements. This time lag is utilized to define a new term of “lag angle”. The effects of the material viscoelasticity, structural inertia damping, moving speed, and pavement deterioration conditions on the shape and lag angle of the deflection basin are illustrated. Furthermore, it is found that the lag angle of the deflection basin is closely related to the phase angle of the viscoelastic pavement materials. Finally, the deflection basins predicted by the 3D FE analysis are proven to be comparable to the field deflections obtained at a high moving speed.

Publication DOI: https://doi.org/10.1016/j.conbuildmat.2019.07.228
Divisions: College of Engineering & Physical Sciences > School of Infrastructure and Sustainable Engineering > Engineering Systems and Supply Chain Management
College of Engineering & Physical Sciences
College of Engineering & Physical Sciences > Aston Institute of Materials Research (AIMR)
Funding Information: The authors gratefully acknowledge the support provided by the Texas Department of Transportation (TxDOT) under Project 0-6869 : Advancing Innovative High-Speed Remote-Sensing Highway Infrastructure Assessment Using Emerging Technologies .
Additional Information: © 2019, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/
Uncontrolled Keywords: 3D finite element modelling,Deflection basin,Deterioration condition,Lag angle,Moving load,Phase angle,Civil and Structural Engineering,Building and Construction,General Materials Science
Publication ISSN: 0950-0618
Last Modified: 15 Jul 2024 07:58
Date Deposited: 09 Aug 2019 08:18
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Related URLs: http://www.scie ... 950061819319130 (Publisher URL)
http://www.scop ... tnerID=8YFLogxK (Scopus URL)
PURE Output Type: Article
Published Date: 2019-11-30
Published Online Date: 2019-08-05
Accepted Date: 2019-07-19
Authors: Deng, Yong
Luo, Xue
Gu, Fan (ORCID Profile 0000-0002-3992-3545)
Zhang, Yuqing (ORCID Profile 0000-0001-5825-0131)
Lytton, Robert L.

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