Numerical analysis on distribution and response of acceleration field of pavement under moving load
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International Journal of Pavement Research and Technology Journal homepage: www.springer.com/42947
Numerical analysis on distribution and response of acceleration field of pavement under moving load Guannan Yana, Zhoujing Yea, Wentao Wanga, Linbing Wangb,c* a National Center for Materials Service Safety, University of Science and Technology Beijing, Beijing 100083, China USTB-Virginia Tech Lab on Multifunctional Materials, University of Science and Technology Beijing, Beijing 100083, China c Department of Civil and Environmental Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA b Joint
Received 13 June 2020; received in revised form 17 September 2020; accepted 11 October 2020
Abstract
In the previous studies on the dynamic responses of pavement, most researchers paid attention to the stress and strain responses of pavement. With the passings of vehicles, road structures will inevitably produce vibration accelerations. Since acceleration is closely related to many physical quantities according to the definitions in physics, the acceleration of pavement can reflect pavement conditions from the side, and the relevant studies on the acceleration field of pavement under moving load are worth conducting. In this study, with the help of ABAQUS, the numerical analysis on t he distribution and response of the acceleration field of pavement under moving load was carried out, and the influencing degrees of vehicle load, vehicle speed and the elastic modulus of upper layer on the acceleration response of intact pavement were also compared based on the designed orthog onal test. It was found that the threedirectional accelerations of pavement present symmetrical distributions around the loaded area, and the vertical acceleration is the largest but decays rapidly with the form of quartic polynomials as far away from the loaded area. Meanwhile, the mechanical state of pavement can be evaluated by analyzing pavement accelerations. Besides, the acceleration response of the intact pavement in this study is the most sensitive to the influenci ng factor of vehicle speed, followed by vehicle load, and the brought effect of the elastic modulus of upper layer is the lowest in general. Keywords: Numerical analysis; Three-directional Accelerations; Vertical acceleration; Orthogonal test
1. Introduction In road engineering, the dynamic responses of pavement under moving load have always been one of key issues paid attention to by experts and scholars. As the most commonly used three categories of research methods, theoretical deduction, numerical simulation and field measurement are still the important means we rely on in the process of exploring the laws on the dynamic responses of pavement; especially, the method of numerical simulation is favored by scholars due to the rapid development of computer technology. Over the past 20 years, many numerical simulation methods, including finite element method, discrete element method and finite difference method, have been widely applied in road engin
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