Double-steel-type rectangular steel pipe and high-strength concrete column and producing method

Abstract

The invention relates to a double-steel-type rectangular steel pipe and high-strength concrete column. The double-steel-type rectangular steel pipe and high-strength concrete column comprises a rectangular steel pipe and high-strength concrete. The rectangular steel pipe is formed by fixedly connecting a flange and a web. The flange is made of common steel. The web is made of high-strength steel.The rectangular steel pipe is vertically arranged and is filled with the high-strength concrete. The high-strength concrete is internally provided with a first spiral stirrup and a second spiral stirrup. The first spiral stirrup and the second spiral stirrup are sequentially arranged in the length direction of the cross section of the rectangular steel pipe. One side of the first spiral stirrup and one side of the second spiral stirrup are fixedly connected. The constraint effect of the rectangular steel pipe on the high-strength concrete is improved by the first spiral stirrup and the secondspiral stirrup, the local bending of the rectangular steel pipe is delayed, the bearing capacity and ductility of a rectangular steel pipe concrete column are improved, the performance utilization rate of a rectangular steel pipe and high-strength concrete column material is effectively improved, and the anti-seismic performance of a component is improved. The invention further relates to a preparation method of the double-steel-type rectangular steel pipe and high-strength concrete column.

Description

technical field [0001] The invention relates to the field of building structures, in particular to a high-strength concrete column with double-steel-type rectangular steel tubes and a preparation method. Background technique [0002] In the field of civil engineering, there are many combinations of different building materials, and the most widely used materials are steel and concrete. Concrete-filled steel tube structure is a common form of steel-concrete composite structure, which is made by filling concrete into steel tubes. [0003] During the loading process of concrete-filled steel tube columns, the steel tubes form a rigid constraint on the core concrete. Both the steel tubes and the concrete are in a three-dimensional stress state. brittle failure. [0004] In real life, due to the layout of the building space and other reasons, some narrow and long areas require rectangular cross-sections for CFST columns. However, the rectangular concrete-filled steel tube colum...

AI Technical Summary

Problems solved by technology

However, the rectangular concrete-filled steel tube column has a weakly restrained area at the corner, and the rectangular steel tube is relatively easy to locally buckle, so its bearing capacity and ductility are relatively poor, which affects the application of the rectangular steel tube concrete column

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