Response Analysis Of Cement Concrete Pavement Under Heavy Traffic

As the main structure form of high-grade highway in China, cement concrete pavement has been widely used by the reason of its own advantages such as high strength, good stability and durability. However, with the vigorous development of our country’s road transport industry, the vehicle overload phenomenon is increasingly serious, which lead to the cement concrete pavement appearing some diseases before its service life.Heavy traffic has become one of the main causes of cement concrete pavement early damage.Therefore,it has practical significance for cement concrete pavement to improving the performance and prolong the service life by studying the features of heavy-load traffic road, expliciting the structural response of cement concrete pavement under the action of overloading,Based on the research status of domestic and overseas, this article start leraning from the characteristics of overload transportation and then analysis the structural response of concrete pavement structure by using large-scale finite element analysis software ANSYS. In this paper, the main research content is as follows:1. According to the theory of finite element method, this article establishe cement concrete road model with the help of ANSYS software, analysise the maximum pulling stress and vertical displacement of pavement structure under the action of the overloaded transportation, work out that the overloading transportation can do great damage to cement concrete pavement, and then get the variation tendency of maximum pulling stress and vertical displacement through change different parameter.2. In view of the void problem in the process of using cement concrete pavement, this paper using ANSYS software to analyze void situation of cement concrete pavement, figure out the mechanical behavior in different void location, summary the change rule of maximum tensile stress and vertical displacement, and then discuss the changes features of void pavement bearing capacity. All those work can provide mechanical foundation for cement concrete pavement which has void situation.