Dynamic Response of Continuous Uphill Pavement with Multi-Layer Plate on Viscoelastic Half-Space Foundation

Abstract

In order to study the dynamic response of driving vehicles on mountainous roads, a three-dimensional (3D) pavement roughness model is reconstructed using the random sine wave superposition method and MATLAB combined with Trucksim software. The road structure is simulated using an infinite multi-layer plate model on a viscoelastic half-space foundation. Through the continuous uphill operation of a three-axle vehicle, the 3D forces of vehicle–road interaction and vehicle driving process are analyzed, and use a self-developed generalized integral calculation program to solve the vertical displacement of a four-layer plate. The results show that compared to 2D pavement, the maximum and root mean square values of longitudinal and lateral forces on 3D pavement differ significantly, with 3D pavement having a 42.95% higher lateral force than 2D pavement. When the vehicle is driving on a circular gentle ramp, the 3D force of the vehicle–road interaction changes significantly. Compared with longitudinal and lateral forces, the vertical force is more significant and more sensitive to the road shape. The vertical displacement impact of multiple tires on the road is not simply the sum of the actions of each tire, comprehensive consideration is needed based on tire position. For example, the influence of track width and other factors. The research results can provide technical guidance for heavy vehicles to continuously climb slopes, pass through arch bridges, culverts, and other working conditions.