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Method for determining axial compression stability bearing capacity of double-limb compound section column of dust collector box

A technology of stable bearing capacity and combined cross-section, which is applied in the direction of instruments, electrostatic separation covers, electrical digital data processing, etc., to achieve the effects of wide application range, convenient use and good reliability

Active Publication Date: 2018-05-25
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to address the vacancy of a design method for the axial compression stability of a column with a combined cross-section of two limbs in the enclosure system of the dust collector box, and to propose a method for determining the stability of the column with a combined cross-section of the two limbs of the dust collector box under axial pressure. In the method of bearing capacity, considering the initial geometric defects of the wallboard-column structural system and the influence of the residual stress generated during the welding process of the wallboard and the column, quantitative research was carried out on the influence of each parameter, and a number of structural Stable Bearing Capacity of Columns Under Axial Compression with Combined Section of Double Limbs Characterized by Geometric Parameters

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  • Method for determining axial compression stability bearing capacity of double-limb compound section column of dust collector box
  • Method for determining axial compression stability bearing capacity of double-limb compound section column of dust collector box
  • Method for determining axial compression stability bearing capacity of double-limb compound section column of dust collector box

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Embodiment 1

[0031] In the present invention, under the condition of considering the influence of the initial defects of the structure, the calculation, comparison and analysis of the axially stable bearing capacity of the double-leg combined section column in the dust collector structure with different geometric structures are numerically simulated through the finite element software ANSYS, and the stiffening wall of the dust collector The structural system of the slab-double-leg combined section column is shown in Figure 1, and the cross-sectional form of the double-leg combined column is shown in the attached figure 2 shown. In engineering practice, because the edge columns generally bear a small load and the design section is small, only the middle column in the calculation model is a double-leg composite section column, and the edge columns on both sides are single-leg hot-rolled H-shaped steel columns. The finite element calculation and analysis process is described as follows:

[0...

Embodiment 1

[0040] The column section of the dust collector box is H294×200×8×12 (section height h×flange width b f × web thickness t w × Flange thickness t f ), the thickness t of the wallboard and the connecting wallboard is 6mm, the width b of the connecting wallboard is 1120mm, and the distance between lateral supports is l 0 is 3100mm, and the middle surface of the connecting wallboard is located on the x-x axis of the symmetry axis of the H-shaped steel section, that is, y 1 (the distance between the middle surface of the connecting wall panel and the front flange) = y 2 (the distance between the middle surface of the connecting wall panel and the rear flange) = 147mm (if the model used in the follow-up analysis does not specify the position of the connecting wall panel, that is, according to y 1 =y 2 =0.5h value).

Embodiment 2

[0042] The section of the column of the dust collector box is H300×300×10×15 (mm), the thickness t of the wallboard and the connecting wallboard is 5mm, the width b of the connecting wallboard is 1320mm, and the distance between the lateral supports is l 0 It is 3700mm.

[0043] When the maximum axial residual stress σ is produced on the section of Example 1 rs,z,max up to 0.78f y , the axial residual stress distribution of the left leg H-shaped steel section near the top of the column (where the maximum axial compressive residual stress occurs in the section) is shown in the attached Figure 4(a) ~ Figure 4(d) As shown, the tensile stress is positive and the compressive stress is negative. Attached Figure 4(a) shows that the joints between the H-shaped steel web and the connecting wall plate, and the joint between the H-shaped steel rear flange and the wall plate generate residual tensile stress, and the residual tensile stress value decays quickly. The residual tensile st...

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Abstract

The invention provides a method for determining axial compression stability bearing capacity of a double-limb compound section column of a dust collector box and belongs to the technical field of dustcollector structures. The method includes the steps that the column section of the dust collector box is a two-limb H-type steel column, and two limbs are connected through connecting wallboards manufactured by reinforced steel plates; the two sides of the compound section column are connected with the reinforced steel plate wallboard of the dust collector box; based on the double-limb compound section column axial compression stability coefficient psi of the dust collector box, the axial compression stability bearing capacity Nr of the double-limb compound section column is calculated, and the formula is as shown in the description, wherein the calculation formula of psi is as shown in the description. The method has a wide application scope and is convenient to use and good in reliability, the relative error does not exceed 4% on average, and the maximum relative error does not exceed 9%, which can be used as reference for design and production units.

Description

technical field [0001] The invention relates to a method for determining the axial pressure stable bearing capacity of a double limb combined section column of a dust collector box, belonging to the technical field of dust collector structures. Background technique [0002] Dust collector is an important environmental protection equipment widely used in electric power, metallurgy, chemical industry, building materials and other industries to eliminate smoke and dust. The capture and collection of soot particles are all completed inside the dust collector box, so the box is the most important process component. The enclosure structure of medium and large dust collectors generally adopts the reinforced steel wall panel-H-shaped steel column structure system. In order to ensure airtightness, the wall panels are continuously welded to the side flange of the H-shaped steel column to form a structural whole that works together. There is a support beam on the top of the box to ha...

Claims

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Application Information

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IPC IPC(8): G06F17/50B03C3/82
CPCB03C3/82G06F30/17G06F30/23G06F2119/06
Inventor 王登峰宋碧颖
Owner JIANGNAN UNIV
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