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Method for calculating stable bearing capacity of U-shaped stiffening plate under action of axial compression

A technology of stable bearing capacity and axial compression, applied in design optimization/simulation, special data processing applications, constraint-based CAD, etc., to achieve the effect of small calculation amount, optimized boundary conditions, and small theoretical calculation description error

Pending Publication Date: 2021-12-10
NINGBO UNIVERSITY OF TECHNOLOGY
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Problems solved by technology

When solving the elastic buckling critical load of the U-shaped stiffened plate of steel box girder, the methods currently used are: taking the lower edge of the stiffened plate as the reference axis, taking the mid-plane of the stiffened plate as the reference axis, and taking the centroid of the stiffened plate as The reference axis and other consideration methods are somewhat different from the actual situation

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  • Method for calculating stable bearing capacity of U-shaped stiffening plate under action of axial compression
  • Method for calculating stable bearing capacity of U-shaped stiffening plate under action of axial compression
  • Method for calculating stable bearing capacity of U-shaped stiffening plate under action of axial compression

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Embodiment Construction

[0093] The following is a further detailed description of the derivation process and calculation method of this calculation model in conjunction with the illustrations:

[0094] A method for calculating the stable bearing capacity of a U-shaped stiffened plate under axial compression, comprising the following steps:

[0095] Step 1, conditional assumption

[0096] In the orthotropic plate, the local U-shaped stiffened plate element is selected, such as Figure 4 As shown, the U-shaped stiffeners on both sides of the mother plate are regarded as boundary conditions, which are equivalent to elastic constraints. The elastic constraints include vertical spring constraints and torsional spring constraints. Then the boundary conditions of the stiffener unit at this time are: loading edge is a simply supported constraint, and the non-loaded side is an elastic constraint, such as Figure 5 to Figure 7 shown. This simplified model only considers the axial compressive load on the mot...

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Abstract

The invention discloses a method for calculating the stable bearing capacity of a U-shaped stiffening plate under the action of axial compression. The method comprises the following steps: step 1, assuming conditions; step 2, obtaining the total potential energy of the U-shaped stiffening plate; step 3, obtaining a flexural surface function; step 4, critical load of the stiffening plate; step 5, determining elastic constraint rigidity; and step 6, comparing the theoretical solution with an ANSYS numerical solution. The invention aims to provide the method for calculating the stable bearing capacity of the U-shaped stiffening plate under the action of the axial compression, the stable bearing capacity of the U-shaped stiffening plate under the action of the axial compression can be more accurately simulated and calculated, the maximum error is 0.42%, and the result coincidence is better.

Description

technical field [0001] The invention relates to the technical field of orthotropic steel box girder structures, in particular to a method for calculating the stable bearing capacity of a U-shaped stiffened plate under axial compression. Background technique [0002] Orthotropic steel box girders have many advantages such as light weight, high bending and torsional rigidity, good wind resistance, and fast construction speed, and are widely used in modern long-span suspension bridges and cable-stayed bridges. U-shaped stiffeners are mainly used for the roof and bottom plates of steel box girders due to their good torsional performance, high rigidity, and good buckling stability. Problems are still prominent. [0003] At present, the research on the stability of the stiffened plate mainly focuses on the model test and finite element numerical analysis, and there are few studies on the calculation and analysis of the stability of the U-shaped stiffened plate. When solving the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/23G06F111/04G06F119/14
CPCG06F30/23G06F2119/14G06F2111/04
Inventor 王飞吕忠达赵卓曹鸿飞赵发军
Owner NINGBO UNIVERSITY OF TECHNOLOGY
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