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A method for improving the ultimate bearing capacity of rectangular concrete-filled steel tube columns in one-way compression bending stability

A technology of rectangular steel pipes and concrete columns, applied in the directions of columns, pillars, piers, etc., can solve the problems of unsafe structure, inaccurate judgment of stable bearing capacity, etc. Effect

Active Publication Date: 2021-10-22
HANGZHOU TONGMSK DESIGN CO LTD
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  • Claims
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Problems solved by technology

[0004] In order to overcome the deficiencies of existing methods and improve the reliability and safety of CFST columns, the present invention provides a method for improving the stability limit bearing capacity of rectangular CFST columns in one-way bending, which solves the problem of inaccurate judgment of stable bearing capacity in the prior art, Technical issues that caused structures to be biased towards unsafe in some cases

Method used

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  • A method for improving the ultimate bearing capacity of rectangular concrete-filled steel tube columns in one-way compression bending stability
  • A method for improving the ultimate bearing capacity of rectangular concrete-filled steel tube columns in one-way compression bending stability
  • A method for improving the ultimate bearing capacity of rectangular concrete-filled steel tube columns in one-way compression bending stability

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Embodiment Construction

[0063] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0064] Embodiments of the present invention and concrete steps thereof are as follows:

[0065] 1. If figure 1 As shown, the rectangular steel tube concrete column is composed of the rectangular steel tube 1 and the concrete 2 poured inside the rectangular steel tube 1. First, according to the geometric parameters, material parameters and the direction of the bending moment axis of the rectangular steel tube concrete column, calculate P P ,P Ex or P Ey 、α ck , the specific formula is as follows:

[0066] P P =fA s +f c A c

[0067]

[0068]

[0069]

[0070] In the formula: I sx , I sy ——The moment of inertia of the rectangular steel pipe around the two bending axes of the section;

[0071] I cx , I cy ——The moment of inertia of the concrete filled in the rectangular steel pipe around the two bending axes of the section;...

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Abstract

The invention discloses a method for improving the stability limit bearing capacity of a rectangular steel pipe concrete column in one-way bending. The rectangular concrete-filled steel tube column is a rectangular concrete-filled steel tube column that bears one-way bending load; first, the equivalent bending moment coefficient of the rectangular steel tube concrete column around the bending axis is calculated according to the direction of the bending axis, and the bending axis is divided into a strong axis and a weak axis ; Then compare the ratio between the axial pressure design value of the rectangular concrete-filled steel tube column and the full-section compressive bearing capacity with the concrete work bearing coefficient, and judge the rectangular steel tube concrete-filled column in the plane according to the following method according to the comparison result combined with the bending axis load stability and take measures to improve stability. The invention solves the problem of judging the in-plane stability of the rectangular steel pipe concrete column, has higher precision, and takes measures to improve the stability, thereby greatly improving the reliability and safety of the rectangular steel pipe concrete structure design.

Description

technical field [0001] The invention belongs to the technical field of structural design and relates to a method for improving the stability of a construction structure, in particular to a method for improving the stability limit bearing capacity of a rectangular steel pipe concrete column in one-way bending stability. Background technique [0002] Rectangular concrete-filled steel pipe columns are formed by filling concrete in empty steel pipes. According to different cross-sectional forms, they can be divided into round and rectangular steel pipe concrete columns, square and rectangular steel pipe concrete columns, etc. During the stress process, the steel pipe restrains the concrete inside to make the concrete in a three-dimensional compression state, which improves the compressive strength and deformation resistance of the concrete; the concrete inside the steel pipe can effectively prevent the local buckling of the steel pipe, so Rectangular concrete-filled steel tube c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/00E04B1/30E04B1/58E04C3/34
CPCE04B1/30E04B1/58E04C3/34
Inventor 景亭程志书付波童根树孙浩薛国庆
Owner HANGZHOU TONGMSK DESIGN CO LTD
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