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A method for calculating the compressive bearing capacity of a double-angle steel cross-shaped combined section component

A technology that combines cross-sections and calculation methods, applied in calculation, electrical digital data processing, instruments, etc., can solve problems such as unreasonable regulations

Inactive Publication Date: 2019-05-21
重庆顺泰铁塔制造有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The application range of Q420 double-angle steel composite section members in transmission towers is becoming more and more extensive, but the relevant design regulations in my country are not very reasonable. There is a deviation between the bearing capacity of the tower designed according to the code and the actual member bearing capacity, so the It is necessary to study the mechanical performance of the double angle steel cross composite member with grade Q420, and it has practical significance and the role of guiding design

Method used

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  • A method for calculating the compressive bearing capacity of a double-angle steel cross-shaped combined section component
  • A method for calculating the compressive bearing capacity of a double-angle steel cross-shaped combined section component
  • A method for calculating the compressive bearing capacity of a double-angle steel cross-shaped combined section component

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Embodiment

[0060] In this embodiment, the software ANSYS is used to establish the finite element model of the double angle steel cross composite section member, such as figure 2 As shown, the finite element analysis is carried out on the finite element model. The joint model is simulated by the shell element SHELL181. The shell element SHELL181 can be better adapted to problems such as linearity, large rotation, and nonlinear large deformation.

[0061] In the embodiment, the component material is Q420 high-strength angle steel, the yield strength is taken as 420MPa, the elastic modulus of the material is taken as E=2.06e5MPa, and the Poisson's ratio is taken as 0.3. The stress-strain relationship of component materials adopts an ideal elastoplastic material model, such as figure 1 shown.

[0062] In the process of finite element analysis, the eccentric load acts along the weak or strong axis of the double-angle steel cross section (the strong axis refers to the axis with a larger sect...

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Abstract

The invention discloses a method for calculating the compressive bearing capacity of a double-angle steel cross-shaped combined section member. The method comprises the following steps: establishing afinite element model of the double-angle steel cross-shaped combined section member; Performing finite element analysis on the finite element model of the double-angle steel cross-shaped combined section component to obtain a finite element analysis result; And carrying out regression fitting on the finite element analysis result to obtain a calculation formula of the axial compression bearing capacity of the double-angle steel cross-shaped combined cross-section component and a calculation formula of the eccentric compression bearing capacity of the double-angle steel cross-shaped combined cross-section component. According to the calculation method, a formula for calculating the compressive capacity of the double-angle steel cross-shaped combined section component is fitted, and a reference can be provided for engineering design by calculating through the formula.

Description

technical field [0001] The invention belongs to the technical field of iron tower design, in particular to a method for calculating the compressive bearing capacity of a double-angle steel cross composite section member. Background technique [0002] The use of high-strength steel on transmission towers has many advantages such as reducing the weight of transmission towers, reducing the amount of steel used, reducing construction costs, and saving resources. For transmission towers with small transmission voltage and small tower body, single angle steel can basically meet the requirements of bearing capacity design. However, during the construction of transmission towers, transmission towers may encounter many complex situations such as crossing large rivers, large distances between towers, multiple lines on towers, large conductor cross-sections, and reinforcement of transmission towers. This greatly increases the load on the tower body, so the transmission tower members c...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 刘蜀宇刘红军陈文军
Owner 重庆顺泰铁塔制造有限公司
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