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A Judgment Method for In-plane Stability Bearing of Concrete-filled Steel Tube Columns

A steel tube concrete column and plane technology, applied in the direction of columns, pillars, pier columns, etc., can solve the problems of inaccurate judgment of stable bearing capacity and insecure structure, and achieve the effect of improving reliability, safety and high precision

Active Publication Date: 2021-05-25
HANGZHOU TONGMSK DESIGN CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to overcome the shortcomings of the existing standard calculation methods and improve the reliability and safety of the design, the present invention provides a method for judging the in-plane stability of the steel pipe concrete column, which solves the problem of inaccurate judgment of the stability of the steel pipe column in the prior art, which leads to structural safety. Unguaranteed technical problems, this method is consistent with the numerical analysis results, with good accuracy and a wide range of applications

Method used

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  • A Judgment Method for In-plane Stability Bearing of Concrete-filled Steel Tube Columns
  • A Judgment Method for In-plane Stability Bearing of Concrete-filled Steel Tube Columns
  • A Judgment Method for In-plane Stability Bearing of Concrete-filled Steel Tube Columns

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Embodiment Construction

[0065] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0066] Embodiments of the present invention and concrete steps thereof are as follows:

[0067] 1. If figure 1 As shown, the CFST column is formed by pouring concrete 3 inside the steel pipes 1 and 2. First, according to the geometric parameters and material parameters of the CFST column, calculate P P , M Px0 , M Py0 、α ck ,P Ex ,P Ey , the specific formula is as follows:

[0068] P P =fA s +f c A c

[0069]

[0070]

[0071]

[0072] In the formula: I sx , I sy ——The moment of inertia of the rectangular steel pipe around the two bending axes of the section;

[0073] 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;

[0074] H - the height of the steel tube concrete column;

[0075] A s 、A c ——the cross-sectional steel tube area and...

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Abstract

The invention discloses a method for judging the in-plane stable load bearing of a steel pipe concrete column. The concrete-filled steel tube column is divided into a concrete-filled steel tube column bearing a one-way compressive bending load and a concrete-filled steel tube column bearing a two-way compressive bending load; for bearing a one-way compressive bending load, the equivalent bending moment coefficient of the steel tube concrete column is first calculated, and then judged Bearing stability: For bidirectional compressive bending loads, first calculate the equivalent bending moment coefficient of the CFST column, and then calculate the ratio of the end bending moment around the two bending axes to the plastic bending moment of the section: then judge the bearing stability. The invention comprehensively solves the problem of judging the in-plane stability of the steel tube concrete column, has higher precision, greatly improves the reliability and safety of the steel tube concrete structure design, and is widely applicable.

Description

technical field [0001] The invention belongs to the technical field of structural design and relates to a method for judging the stability of a construction structure, in particular to a method for judging the in-plane stability of a steel tube concrete column. Background technique [0002] Concrete-filled steel pipe columns are formed by filling concrete in empty steel pipes, and can be divided into round concrete-filled steel pipe columns, square and rectangular steel pipe concrete columns, etc., according to different cross-sectional forms, such as figure 1 shown. 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 capacity of the concrete; the concrete inside the steel pipe can effectively prevent local buckling of the steel pipe, so the steel pipe Concrete columns have excellent mechanical properties, specifically manifested in the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/13E04C3/34
Inventor 童根树付波
Owner HANGZHOU TONGMSK DESIGN CO LTD
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