Structural Analysis Of The Asphalt Pavement Based On The Creep Test

The asphalt mixture is one kind of representative viscoelasticity material, which are applied to the road, airport, hydrotechnical construction. Under the condition of the increasing pressure from volume of traffic, speed of a vehicle improving, the traffic channeling, especially low temperature climate condition northeast China. It is important that the low temperature resists to crack , high temperature deformation, long time loading and tracking problem research to the asphalt pavement. The creep property is always one of the importance index which can appraise asphalt mixture, the large amount of the experiment about asphalt creep property having carried out in recent years at home and abroad, and gets certain achievements in the field of appraising the creep property which use creep life and flowing deformation. This work use asphalt creep property, discussing different pavement and base behavior, make more system profound research about deformation of pavement structure during the process of loading, discuss mainly several following problem:1),Starting with creep phenomenon, introduce concept of creep test and deformation stage detailedly. This work get creep curve from axis static load creep test, and discuss visco-elastic behaviour of asphalt mixture. Introduce the process of creep test and discuss factors which will affect test result's during the test process in the work. Selecte Burgers model which will be prone to combine with engineering practice after analysising visco-elastic of models. Adopt the Origin7.0 self definition fitting implement to simulate creep compliance curves and get the creep parameter.2),Combines with representative pavement structure——semi-rigid and flexibility base pavement, applies large-scale finite element software ANSYS10.0 to build 3-D finite element method model, then converts the finite element net lattice information and leads to rock soil project software FLAC3D.In the base of creep parameters from creep test and representative pavement structure, ascertain material parameters of model. Apply FLAC3D to analyse the different pavement structure deformation under load effect as well as Mechanics responds. 3),Combines with parametrs of base and pavements of building express highway and the above method to build model, carries out comparative analysis. Finally, apply this method to estimate track , arrived expected effect.