Finite element generation method, equipment and medium for three-dimensional stress of tie bar and dowel bar

Abstract

The invention relates to the technical field of stress simulation of road engineering, and discloses a finite element generation method, equipment and medium for the three-dimensional stress of tie bars and dowel bars. Finite element model; calculate the joint stiffness of the 3D finite element model; calculate the spring stiffness of the 3D finite element model according to the joint stiffness; according to the spring stiffness, construct the spring connection between the plate side nodes in the 3D finite element model for preliminary simulation The connection form of tie rods and dowel bars; the spring connection between the nodes on the side of the plate is converted into a connector connection to further simulate the tie rods and dowel bars, and generate the three-dimensional stress of the tie rods and dowel bars. By adopting the present invention, the three-dimensional stress of the longitudinal dowel bar at the transverse joint of the roadway, the longitudinal dowel bar at the transverse joint of the road shoulder, and the transverse tie rod at the longitudinal joint of the roadway-shoulder cement board can be analyzed, so as to facilitate the in-depth study of the stress on the cement pavement structure Analyze and optimize the design of tie rods and dowel bars.

Description

technical field [0001] The invention relates to the technical field of stress simulation of road engineering, in particular to a finite element generation method for the three-dimensional stress of a tie bar and a dowel bar, a computer device and a computer-readable storage medium. Background technique [0002] In the mechanical calculation of cement pavement structure, in order to obtain more accurate finite element numerical calculation results, the simulation of the dowel bars between the cement board and the transverse joints of the cement board and the tie rods between the longitudinal joints is particularly important. [0003] At present, there are mainly three methods for simulating cement slab tie rods and dowel bars: [0004] 1. Using the spring element to simulate. This method needs to calculate the spring stiffness of each node position through the formula, and the simulation is accurate, but the manual addition workload is relatively large, and the spring in the...

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Problems solved by technology

However, it is difficult for this method to determine the accurate stiffness parameters through indoor test methods. At the same time, interlayer problems are also contact problems, and nonlinear contact problems are often unable to obtain calculation results due to convergence.

[0007] Therefore, none of the existing methods can accurately simulate the cement slab tie rods and dowel bars, which is not conducive to the in-depth analysis of the force on the cement pavement structure and the optimal design of the tie rods and dowel bars

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