Simulation analyzing and modeling method for vertical cracking damage of basin rubber bearing bottom basin

Abstract

The invention discloses a simulation analyzing and modeling method for the vertical cracking damage of a basin rubber bearing bottom basin. The method comprises the implementation steps of: determining working conditions 1, 2 and 3 of a basin rubber bearing in advance; building an original finite element analysis model; inverting the original finite element analysis model and carrying out the stress analysis on the working condition 1; carrying out same-volume and same-thickness structural simplification on a rubber mat to obtain a new finite element analysis model; carrying out the stress analysis on the working conditions 1, 2 and 3 aiming at the new finite element analysis model; and comparing stress analysis results obtained by the two stress analyses on the working conditions 1. According to the method, the structure of the rubber mat is optimized to ensure that the working conditions can be converged; comparative analysis is carried out on the two analysis results of the workingcondition 1 to verify the feasibility of an original finite element model optimizing method of the bearing; and the damaging process of the vertical cracking damage of the bearing bottom basin can beobtained through the analysis results of the working conditions 2 and 3. The method disclosed by the invention has the advantages that the simulation analysis is carried out on the vertical cracking damage of the basin rubber bearing bottom basin; and a lot of post-maintenance costs of the bearing are saved.

Description

technical field [0001] The invention relates to a simulation analysis and modeling technology of a basin-type rubber bearing used for shock absorption and isolation of bridges, in particular to a method for simulation analysis and modeling of vertical cracking failure of the basin of the basin-type rubber bearing. Background technique [0002] The basin-type rubber bearing is a new type of bridge bearing developed in the late 1950s abroad. It uses the rubber pad built in the bottom basin to bear pressure and rotate, and at the same time uses the polytetrafluoroethylene plate (PTFE plate) and the stainless steel plate. Planar sliding meets the displacement requirements of the bridge. At present, pot rubber bearings have been widely used in long-span bridges of railways and highways in my country, and have become the most important bearing type of highways and railway bridges. When there are many or large spans and the beam height is not large, if the rigid frame system conso...

AI Technical Summary

Problems solved by technology

[0003] Under normal circumstances, pot rubber bearings are prone to defects such as cracks and deformation of steel parts, excessive displacement and rotation angle, wear of slide plates, desoldering of weldments, extrusion of pressure-bearing rubber plates or sealing rings, etc.

Due to defects inside the basin wall, cast iron instead of cast steel, and uneven bottom of the support, the force on the support is uneven, local stress is concentrated, and vertical cracking of the basin is prone to occur. many in the bridge

In the installation and construction of the basin-type rubber bearing, the bottom basin is empty, causing deformation or even cracking of the bottom basin, the installation of the bottom of the support is uneven, and the angle between the required displacement direction of the movable support along the bridge direction or the longitudinal bridge direction and the sliding direction is too large, resulting in The function of the support fails, and its abnormal force causes damage to the support parts and other quality problems

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