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• W2980212384 endingPage "103410" @default.
• W2980212384 startingPage "103410" @default.
• W2980212384 abstract "To accurately and effectively simulate the cracking and crushing process of concrete pavement under multi-head impact loading, a large-scale road 3D model that considers concrete pavement, subgrade and soil foundation is established. Then, the discontinuum element method is applied in the concrete pavement's potential fracture area, and the continuum element method is applied in the hammer body and the non-fracture area of concrete pavement. A cohesive model is applied to the element interface of the concrete fracture area, and a contact element is used to deal with the interaction between the hammer body and the pavement. Mesoscopic simulations on the impact cracking process of concrete pavement are conducted by considering the element shapes, three-dimensional aggregates, impact locations and impact velocities. Finally, impact testing and core drilling are conducted in the field to evaluate the simulation results. The results demonstrate that the cracking and crushing process of concrete pavement can be quickly simulated via the continuum-discontinuum element method (CDEM), and the simulation results agree with the results of the in-site tests. The concrete pavement model that is meshed by tetrahedral elements and includes aggregates can result in a higher calculation efficiency and superior impact cracking performance. Concrete pavement is severely crushed in the impact contact area, closed quadrangle crack surfaces form along the inside of four hammerheads, and tension crack surfaces mainly propagate along the long axis of the rectangular hammerheads. The impact locations mainly affect the crack distribution of the concrete pavement, and the impact velocities determine the fracture degree. As the impact velocity increases, the impact force linearly changes, whereas the fracture degree varies according to a power function. Overall, the influence of the impact velocities on concrete cracking is greater than the impact locations." @default.
• W2980212384 created "2019-10-18" @default.
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• W2980212384 date "2020-01-01" @default.
• W2980212384 modified "2023-09-23" @default.
• W2980212384 title "Investigation of concrete pavement cracking under multi-head impact loading via the continuum-discontinuum element method" @default.
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• W2980212384 doi "https://doi.org/10.1016/j.ijimpeng.2019.103410" @default.
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