Concrete post provided with counter pulling sheet profile steel welding rectangular steel tube

Abstract

The present invention discloses a concrete post provided with a counter pulling sheet profile steel welding rectangular steel tube, which relates to a rectangular steel-tube concrete post which is composed of a steel tube and concrete, wherein the steel tube is welded by belt rib profile steel and counter pulling sheets arranged transversely. The counter pulling sheet profile steel welding rectangular steel-tube concrete post enables welding seam positions not at four angle positions stressed largely and while at positions stressed little at the middle of a pipe wall. At the same time, the wall thickness and welding seam volume of the steel tube can be reduced, the constraint force of the middle of the pipe wall for the concrete is increased, and the bearing force of the total component is improved.

Description

technical field [0001] The invention relates to a load-bearing member of a building structure, in particular to a rectangular steel tube concrete column. Background technique [0002] Rectangular steel pipe concrete is composed of external rectangular steel pipes and internally poured concrete. In recent years, due to the advantages of both steel structure and concrete structure, the rectangular steel tube concrete structure has high bearing capacity, good seismic performance, and can reduce project cost, shorten construction period, save materials, and reduce energy consumption. Used in civil and industrial buildings. [0003] In my country's "Technical Regulations for Rectangular Steel Tube Concrete Structures" (CEC 159:2004), the steel pipe is welded by four steel plates 1 at right angles, and the welding place is a right angle weld 2, and its cross-section is rectangular. figure 1 ; At the same time, it is stipulated in the regulations that "when the maximum side dimen...

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Problems solved by technology

[0005] In the actual application at the present stage, rectangular concrete-filled steel tube structures are mainly used in high-rise and super high-rise buildings, and the cross-sectional dimensions of the columns are generally greater than the limit of 800mm, so it is necessary to adopt structures such as "welding studs on the inner wall of the column, longitudinal stiffeners, etc. Measures", which greatly increased the number of welds 5 between longitudinal stiffeners and steel plates, and at the same time brought great difficulties to factory processing, see attached Figure 4

However, the regulation that "the wall thickness of the steel pipe should not be less than 4mm" makes the construction cost of rectangular steel pipe concrete relatively high in the application of low-rise buildings.

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