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A hollow concrete filled steel tube column with curved inner steel tubes

A technology for hollow steel pipes and concrete columns, which is applied in the direction of columns, pillars, pier columns, etc., can solve the problems of harmful cracks and the difficulty of transferring the heat of hydration of concrete columns to the outside, and achieve the improvement of buckling strength, reduction of fine cracks, and sufficient material performance effect

Active Publication Date: 2022-02-15
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art, to provide a hollow concrete-filled steel tube column with an arc-shaped inner steel tube, which improves the mechanical performance of the steel tube in the hollow concrete-filled steel tube column, and solves the problem that the concrete column is prone to hydration after pouring. Difficulty transferring heat outwards causing harmful cracks

Method used

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  • A hollow concrete filled steel tube column with curved inner steel tubes
  • A hollow concrete filled steel tube column with curved inner steel tubes
  • A hollow concrete filled steel tube column with curved inner steel tubes

Examples

Experimental program
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Effect test

Embodiment 1

[0026] like figure 1 and figure 2 As shown, this embodiment is a hollow concrete-filled steel tube column with an arc-shaped inner steel tube, which includes an outer steel tube 1 , an inner steel tube and a steel plate extension 2 .

[0027] like figure 1 and figure 2 As shown, the outer steel pipe is a square outer steel pipe, concrete 3 is filled between the outer steel pipe and the inner steel pipe, and the concrete is high-strength concrete. In other embodiments, the outer steel pipe can be circular or other geometric shapes, and the concrete can be self-compacting concrete. Not all of them are listed here.

[0028] like figure 1 and figure 2 As shown, the inner steel pipe includes two first arc-shaped plates 4 and two second arc-shaped plates 5, the two first arc-shaped plates are respectively arranged oppositely, and the two second arc-shaped plates are respectively arranged oppositely, and the second arc-shaped plates are respectively arranged oppositely. The ...

Embodiment 2

[0031] like image 3 and Figure 4 As shown, the difference between this embodiment and Embodiment 1 is that the above-mentioned hollow concrete-filled steel tube column with arc-shaped inner steel pipes also includes a plurality of straight steel plates 7, and the two ends of the third arc-shaped plates are respectively connected with the plates of the straight steel plates. Surface connection, the tangent at the end of the first curved plate forms an angle with the surface of the straight steel plate, specifically the tangent at the end of the third curved plate is perpendicular to the surface of the straight steel plate, and the straight steel plate along the The longitudinal height of the three-arc-shaped plate is set at the full length, and the relative slip between the inner steel pipe and the concrete is reduced through the straight steel plate. At the same time, the straight steel plate has thermal conductivity, which can transfer the hydration heat generated by the co...

Embodiment 3

[0033] like Figure 5 and Image 6 As shown, the difference between this embodiment and Embodiment 1 is that the steel plate extension is an angle steel, the size of the first arc-shaped plate and the second arc-shaped plate are the same, and the adjacent two first arc-shaped plates and the second arc-shaped plate The ends of the shaped plates are connected to each other, and one side of the angle steel is connected to the junction of two adjacent first and second curved plates, and the cross-sectional central angle of the first and second curved plates is 45° , the angle steel is set along the full length of the longitudinal height of the first arc-shaped plate, and the relative slip between the inner steel pipe and the concrete is reduced through the angle steel, and at the same time, the angle steel has thermal conductivity, which can transfer the hydration heat generated by the concrete to the hollow part, effectively reducing the The tiny cracks produced by the hydration...

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Abstract

The invention discloses a hollow concrete-filled steel tube column with an arc-shaped inner steel tube, which comprises an outer steel tube, an inner steel tube and a steel plate extension, and concrete is filled between the outer steel tube and the inner steel tube, and the inner steel tube includes a plurality of first arc-shaped plates and a plurality of The second arc-shaped plate, the two ends of the second arc-shaped plate are respectively connected to two adjacent first arc-shaped plates, a plurality of first arc-shaped plates and the second arc-shaped plates are surrounded to form an inner steel pipe, and the inner steel pipe is hollow, The geometric centers of the outer steel pipe and the inner steel pipe coincide, the first arc-shaped plate and the second arc-shaped plate protrude toward the geometric center of the outer steel pipe, and the two ends of the first arc-shaped plate are respectively connected with the steel plate extension. The longitudinal buckling strength of the inner steel pipe wall and the restraining effect on the concrete between the inner and outer steel pipes are improved through the arc-shaped inner steel pipe. The steel plate extension goes deep into the concrete, and the steel plate extension has thermal conductivity, which can transfer the hydration heat generated by the concrete to the hollow part, effectively reducing the fine cracks caused by the hydration heat effect inside the large-volume concrete.

Description

technical field [0001] The invention relates to the technical field of construction engineering, in particular to a hollow concrete-filled steel tube column with an arc-shaped inner steel tube. Background technique [0002] In recent years, the number of high-rise super high-rise buildings in my country has been increasing, and the requirements for the bearing capacity and seismic performance of vertical load-bearing components have also been continuously improved, resulting in the increase of the cross-sectional size of vertical components and affecting the use of building space. Through the reasonable combination of steel and concrete, the steel tube concrete structure gives full play to the material properties of steel and concrete, and effectively reduces the cross-sectional size compared with ordinary concrete columns. [0003] However, with further breakthroughs in building height, the size of the concrete-filled steel tube columns at the bottom and middle floors of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E04C3/32E04C3/34
CPCE04C3/32E04C3/34
Inventor 左志亮徐哲蔡健郑嘉豪陈庆军姜正荣杨春
Owner SOUTH CHINA UNIV OF TECH
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