Prefabricated Prestressed Steel Tube Concrete Column and Its Construction Method

A technology of steel pipe concrete columns and construction methods, applied in the direction of columns, pillars, pier columns, etc., to achieve the effect of improving compressive strength, simple structure, and realizing assembly construction
CN110306727BInactive Publication Date: 2021-07-02SHANDONG UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SHANDONG UNIV OF SCI & TECH
Publication Date
2021-07-02
Estimated Expiration
Not applicable · inactive patent

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Abstract

A prefabricated prestressed concrete-filled steel tubular column and a construction method. It consists of an outer steel pipe, an upper steel pipe, a lower steel pipe and concrete; the outer steel pipe, the upper steel pipe and the lower steel pipe are all round steel pipes; the upper steel pipe is located at the upper part of the outer steel pipe, and one end extends out of the outer steel pipe; Steel pipes; the outer and upper steel pipes are filled with concrete, and the lower steel pipes have no concrete. During construction, the side surfaces of the concrete formed column are chiseled, the top and bottom surfaces are ground flat, the outer steel pipe is heated, and the outer steel pipe is sleeved on the concrete formed column. The invention can solve the constraint problem of the steel tube on the concrete in the initial stage of loading, improve the mechanical performance of the concrete-filled steel tube column in the use stage, and realize assembly construction.
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Description

technical field

[0001] The invention relates to the field of prefabricated steel pipe concrete columns in assembled composite structures. Background technique

[0002] The concrete-filled steel tube column has good mechanical performance. The concrete is restrained by the outer steel tube, and the compressive strength is improved. The outer steel tube is not prone to buckling failure under the support of the inner concrete. However, the restraint of the outer steel pipe on the inner concrete is passive. At the initial stage of loading, the Poisson's ratio of the steel is greater than that of the concrete, and the steel pipe has no restraint on the concrete. When the Poisson's ratio of the concrete is greater than the Poisson's ratio of the steel, The lateral deformation of concrete is greater than that of steel pipes. Concrete is restrained laterally by steel pipes. Concrete is in a three-dimensional compression state, and its strength is increased. Therefore, this restraint...

Claims

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