Analysis of the Dynamic Response of the Roughness Asphalt Pavement
|Keywords||pavement roughness dynamic amplification factor engine dynamic loading moving loads dynamic response|
In recent years, asphalt pavement has become one of the main pavement structure in our country. But there has many problems after the highway is completed, Asphalt pavement structure exist many early damage, reflect the asphalt pavement structure is inadequate performance in long time using, this prompted us to explore the pavement structure deeply, and take a effective method which can reflect the pavement mechanics behavior under actual traffic loading.In response to the above problems, a semi rigid asphalt pavement structure is selected to establish in this paper, and by using the finite element analysis program ANSYS to get the dynamic response of asphalt pavement under traffic loading. And calculate the dynamic stress、strain about the asphalt pavement structure under different roughness、different loads, and get the influence rules. The main contents are as follows:1、Get the dynamic amplification factor in different roughness and different speeds, and get the engine dynamic loading.2、Using a quarter vehicle model, calculate the stress, strain and displacement of the asphalt pavement structure in different roughness. And analysis those response to get related conclusions.3、Using five-axis semi-trailer and half vehicle model, calculate the stress、strain of the asphalt pavement structure in Standard loading and different roughness.And analysis those response to get related conclusions.4、Calculate the stress、strain of the asphalt pavement structure in different overloading. And analysis those response to get related conclusions.In this paper, there is a point of innovation:using engine dynamic loading、five-axis semi-trailer and half vehicle model to calculate the stress、strain of the asphalt pavement structure in Standard loading and overloading.Through the analysis in this paper we get some conclusions, which can be used in design, building operations and management of asphalt pavement engineering. They will give some theoretical significance and references in the future.