Numerical Calculation And Analysis On Cracking Of Continuously Reinforced Concrete Pavement

Compared with the traditional cement concrete pavement structure, continuously reinforced concrete pavement(CRCP) has many advantages such as driving comfort, good durability, long service life and low maintenance costs as a kind of typical pavement structure rigidity. Continuously reinforced concrete pavement has been widely used in foreign countries. For our country actual situation which overload and overloading phenomenon becomes more and more serious, application of continuously reinforced concrete pavement in trunk highways will become one of the important research topic in the field of highway engineering. It is of important practical application value to develop theory research and engineering application technology development of continuously reinforced concrete pavement structure.Continuously reinforced concrete pavement test section cracked after running six months in Henan provincial highway, based on the engineering background, crack and damage of continuously reinforced concrete pavement was simulated with finite element software ABAQUS to solve the problem of the project. Firstly, the parameters of damage plasticity model were determined and verified by three point bending beam. Secondly, simulation and analysis of temperature stress in continuously reinforced concrete pavement structure was employed, and the accuracy of temperature parameters was verified by comparison and analysis with theoretical calculation results of temperature stress. Thirdly, damage of pavement structure was analyzed under thermal load and vehicle load. The results show that the established pavement model agrees with the actual pavement. Finally the reason of CRCP cracking was analyzed by damage simulation analysis combining with the theoretical calculation, mainly including reinforcement ratio, position of steels, thickness of pavement panels, temperature, foundation parameters, end anchorage, grassroots modulus, concrete modulus and so on. It is significant to solving practical engineering problems for determine the best position and best reinforcement ratio and find the cause of continuously reinforced concrete pavement cracking ultimately. Results show that the low reinforcement ratio is the main reason of cracking. Not only playing a limited role, configuration of reinforced has deepened the extension of crack. Other, low foundation elastic modulus, not end anchorage, low base modulus are the main cause of continuously reinforced concrete pavement cracking. panel slip, temperature stress, parameters of reinforced have an important effect on the development of cracks and the position of the reinforcement, the elastic modulus, are not the main influencing factor of the cracks. This research result is of great importance in solving practical engineering problems.