Horizontal Distribution of Pavement Structure Layer Stress Under a Circular Uniform Load

Abstract:

Based on elastic layer theory, horizontal distributions of tensile stress and subgrade compressive stress of pavement structure layer are studied. The rules of the radial stress coefficient φr and tangential stress coefficient φθ at the bottom of pavement structure layer and stress coefficient on the top of subgrade φz decreasing with the increasing of the horizontal distance between the midpoint of load and the calculation point r are investigated in detail. The influence of pavement structure parameters on the three stress coefficients φi is analyzed. The regression relationship among the three stress coefficients φi, pavement structure parameters and the horizontal distance between the midpoint of load and the calculation point r is given. The research results can provide foundation for the studying of multi axle load superposition effect.