Mechanical Response of Asphalt Surfaces under Moving Traffic Loads Using 3D Discrete Element Method

Review on Design, Characterization, and Prediction of Performance for Asphalt Materials and Asphalt Pavement Using Multi-Scale Numerical Simulation

“…Wang et al [31] compared the dynamic responses of asphalt pavement in dry and saturated conditions under moving vehicle loads using 2D FEM models and then con ducted full-scale APT tests in the same loading parameter combination, which were 20 km/h vehicle speed and 0.7 MPa vehicle wheel grounding pressure, to validate the nu merical analyzed results [32]. Peng et al [33] constructed the three-dimensional 3D DEM ALT system, the vehicle simulator moves on the ring test track with the desired speed and load in a precisely controlled path, while the service environment parameters can be strictly controlled for the linear test track in the CE-MLF system, such as temperature, rainfall, ultraviolet radiation, and groundwater table. The purpose of conducting full-scale accelerated loading tests is to obtain mechanical responses of testing roads on the basis of simulating service environment and vehicle load conditions as real as possible, which can lay a solid trial foundation of validation for numerical simulation.…”

“…Wang et al [31] compared the dynamic responses of asphalt pavement in dry and saturated conditions under moving vehicle loads using 2D FEM models and then conducted full-scale APT tests in the same loading parameter combination, which were 20 km/h vehicle speed and 0.7 MPa vehicle wheel grounding pressure, to validate the numerical analyzed results [32]. Peng et al [33] constructed the three-dimensional 3D DEM Wang et al [31] compared the dynamic responses of asphalt pavement in dry and saturated conditions under moving vehicle loads using 2D FEM models and then conducted full-scale APT tests in the same loading parameter combination, which were 20 km/h vehicle speed and 0.7 MPa vehicle wheel grounding pressure, to validate the numerical analyzed results [32]. Peng et al [33] constructed the three-dimensional 3D DEM model of asphalt surface layers to evaluate its mechanical responses under moving traffic loads, and the numerical results were validated by field tests using a self-developed full-scale linear accelerated loading test (ALT) system.…”

“…Peng et al [33] constructed the three-dimensional 3D DEM Wang et al [31] compared the dynamic responses of asphalt pavement in dry and saturated conditions under moving vehicle loads using 2D FEM models and then conducted full-scale APT tests in the same loading parameter combination, which were 20 km/h vehicle speed and 0.7 MPa vehicle wheel grounding pressure, to validate the numerical analyzed results [32]. Peng et al [33] constructed the three-dimensional 3D DEM model of asphalt surface layers to evaluate its mechanical responses under moving traffic loads, and the numerical results were validated by field tests using a self-developed full-scale linear accelerated loading test (ALT) system. In this 3D DEM model, the asphalt surface was constructed according to the random generation algorithm of irregular particles, and two important factors of temperature gradient and fatigue damage were taken into account to simulate permanent deformation, shear stresses, and strains in asphalt surface layers.…”

Asphalt Layer Cracking Behavior and Thickness Control of Continuously Reinforced Concrete and Asphalt Concrete Composite Pavement

“…Ling et al [5] used a finite element model to study the thermal cracking fatigue life of asphalt pavement. Yong et al [6] used a three-dimensional discrete element model embedded with a temperature gradient and fatigue damage to investigate the mechanical response of asphalt surfaces under moving traffic loads. The results indicated that the model could be used to predict the mechanical response of asphalt surfaces under repeated loads.…”

Discrete Element Modeling of the Meso-Mechanical Response of Asphalt Pavement under Vehicle Load

“…Ma et al [ 31 ] simulated the wheel tracking test of asphalt mixtures with a three-dimensional micromechanical discrete element model and studied the movements of coarse aggregates during the test. Peng et al [ 32 ] developed a three-dimensional discrete element model of asphalt pavement by considering the temperature gradient and fatigue damage and studied the permanent deformation, shear stress and strain in asphalt surfaces under moving traffic load.…”