A Simulation Method for Anti-rutting Performance of Asphalt Pavement Considering Load and High Temperature Gap

Abstract

The invention provides a method for simulating anti-rutting performance of asphalt pavement considering load and high temperature gap, using finite element software, comprising the following steps: selecting pavement structure and materials; establishing a rutting prediction model; selecting material parameters and a mechanical constitutive model Obtain meteorological data and daily traffic distribution; simplify the load action mode; determine the load action time and gap time; determine the gap during high temperature periods; simulate the temperature field; predict road rutting; The invention takes into account the characteristics of asphalt pavement self-recovering part of the deformation in the gap between loads and high-temperature periods, so that the rutting simulation is closer to the real situation, and solves the problem of large errors in the simulation results of the existing method; at the same time, it can judge the specific pavement structure Excellent anti-rutting performance, that is, to select a pavement structure with better anti-rutting performance through virtual tests, without the need to build test roads for comparative experiments, which saves a lot of cost.

Description

technical field [0001] The invention relates to the technical field of road engineering, in particular to a method for simulating the anti-rutting performance of asphalt pavement considering the gap between load and high temperature. Background technique [0002] After the development of finite element software, it becomes possible to apply the transient temperature field to rutting prediction. However, the efficiency of computer calculations and the complexity of finite element model construction limit the application of this method. The existing methods can accurately predict short-term rutting under high temperature and heavy load conditions, but cannot accurately predict road surface For the long-term rutting prediction within the service life, the estimated result is much higher than the actual rutting amount. The main reason is that the simulation environment of the existing method is continuous load under continuous high temperature. The invention provides a method f...

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Problems solved by technology

[0003] In order to solve the above existing problems, the present invention provides a simulation method of asphalt pavement anti-rutting performance considering the load and high temperature gap, and solves the problem that the rutting simulation results of the existing method are too large compared with the actual one, and the load gap and high temperature gap are added to the simulation In the process, the simulation environment is closer to the real situation, and the simulation results are more accurate; at the same time, in order to reduce the cost of building the test road and the time cost of the test, the road structure with better anti-rutting performance is selected through the virtual test. For this purpose, the present invention provides a method for simulating the anti-rutting performance of asphalt pavement considering load and high temperature clearance, comprising the steps of:

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