Method for judging stable bearing in steel pipe concrete column plane

Abstract

The invention discloses a method for judging stable bearing in a steel pipe concrete column plane. The concrete-filled steel tubular column is divided into a concrete-filled steel tubular column bodyfor bearing a one-way bending load and a concrete-filled steel tubular column body for bearing a two-way bending load. For bearing a one-way bending load, the equivalent bending moment coefficient ofthe concrete-filled steel tubular column is calculated firstly, then the bearing stability is judged, for bearing a two-way bending load, the equivalent bending moment coefficient of the concrete-filled steel tubular column is calculated firstly, then the ratio of the end bending moment around two bending shafts to the section plastic bending moment is calculated, and then the bearing stability isjudged. The method comprehensively solves the problem of stable bearing judgment in the plane of the concrete filled steel tubular column, has higher precision, greatly improves the reliability and safety of concrete filled steel tubular structure design, and is wide in application range.

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 ...

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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

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