Fatigue Damage Analysis Of Semi-rigid Base Asphalt Pavement

Our semi-rigid pavement widespread early damage is more serious,real life is much lower than the design life.Early damage to the semi-rigid pavement is currently subject to researchers' attention,but is in theory and road design specifications can not be explained.Analysis of semi-rigid to withstand cycle traffic loads and temperature variation loads with fatigue damage development under the rule of the road surface layers of the structure and to study the law of development of cracks in the pavement structure in the secondary after Cracks In this paper,the fatigue damage evolution model and the finite element method.This paper aims to study the failure mechanism of semi-rigid pavement,provide a theoretical basis for the improvement of semi-rigid pavement design specification.Firstly,based on Miner linear fatigue damage evolution model and Chaboche nonlinear fatigue damage evolution model based asphalt concrete asphalt concrete tensile test parameters obtained,Establishment of asphalt concrete simply supported beam model by pulling on the asphalt concrete Miner model and test the resulting model parameters Chaboche optimization and correction.Secondly,we study the semi-rigid pavement semi-rigid base pavement stress field,field damage,deflection evolution under cyclic loading vehicle at Miner linear fatigue damage evolution model and Chaboche nonlinear fatigue damage evolution model,And the relevant law by Miner linear fatigue damage evolution model and Chaboche nonlinear fatigue damage evolution model was subjected to comparative analysis.Again,we study the semi-rigid pavement semi-rigid base pavement stress field,field damage,deflection evolution under cyclic temperature change loads at Miner linear fatigue damage evolution model and Chaboche nonlinear fatigue damage evolution model,and for were analyzed by the relevant laws of Miner linear fatigue damage evolution model and Chaboche nonlinear fatigue damage evolution model obtained.Finally,a preliminary analysis of the injury from semi-rigid pavement design specifications contradict existing norms that exist,and to explore the asphalt pavement structure design steps based on damage.