Abstract
In view of the problems of a single parameter of rock and soil materials, unclear boundary simulation and a simplified dynamic load in the current calculation of pavement settlement, the stochastic finite element-infinite element coupling method was adopted in this study to simulate the roadbed of rock and soil, with a dynamic response analysis and a flex- ible pavement settlement calculation of roadbed were carried out under stochastic dynamic load. Discrete methods and dynamic stochastic finite element formulas for rock and soil random fields were particularly dealt with in this study. The results show that the method to stimulate roadbed is true with high calculation accuracy and strong engineering guiding significance. The displacement of flexible ground at any depth can be obtained by calculating the settlement of flexible pavement with the aid of the Matlab computer program.
Highlights
At present, when the pavement settlement in geotechnical engineering is calculated, the load is converted into static load, and the geotechnical characteristics are regarded as the deterministic factors to be simplified
With the movement of the vehicle model on the flexible pavement, the pavement settlement was calculated at t = 0.1 s, 0.2 s, and 0.35 s, and the results showed that the pavement settlement changes unevenly with the dynamic load, which is closer to the actual settlement trend
The results show that the settlement of each position under dynamic load is different, which further demonstrates that the simulation of stochastic dynamic load using a vehicle load more accurately reflects the pavement settlement trend
Summary
At present, when the pavement settlement in geotechnical engineering is calculated, the load is converted into static load, and the geotechnical characteristics are regarded as the deterministic factors to be simplified. The characteristics of rock and soil are random with a boundary infinite element (Chen et al, 1993; Hao et al, 2001; Cascetta et al, 2016; Liu et al, 2018). The analysis of dynamic randomness, which exists in any structure, is a task that must be studied now. Most of them are analyzed by finite element analysis (Ghiocel and Ghanem 2002). The settlement of flexible pavement was analyzed using the stochastic finite element-infinite element coupling method. The dynamic numerical analysis method for settlement of flexible pavement was implemented
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