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Threaded obliquely-arranged ribbed steel tube concrete column and design method thereof

A technology for concrete-filled steel pipe columns and concrete columns, which is applied in the direction of columns, pier columns, pillars, etc., can solve problems such as poor performance of steel-filled steel pipe columns, affecting concrete compactness, and reduced concrete strength, so as to ensure the quality of concrete, simple structure, The effect of improving performance

Pending Publication Date: 2021-02-19
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The present invention adopts the thread ascending and discontinuous arrangement method to reinforce the large-sized ribs on the inner wall of the steel pipe used in the concrete-filled steel pipe column, which solves the problem of the formation of lower coarse bones due to the rapid sinking of the coarse aggregate in the curing stage after the completion of concrete pouring The accumulation of materials will lead to the occurrence of concrete segregation, which will affect the compactness of the concrete, resulting in the reduction of the strength of the concrete and the problems that the concrete-filled steel pipe column cannot exert its excellent performance.

Method used

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  • Threaded obliquely-arranged ribbed steel tube concrete column and design method thereof
  • Threaded obliquely-arranged ribbed steel tube concrete column and design method thereof
  • Threaded obliquely-arranged ribbed steel tube concrete column and design method thereof

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Embodiment 1

[0046] In this embodiment, the concrete-filled steel tube column of Guangzhou Jiangnan Center is taken as an example. The concrete-filled steel tube column is a circular steel tube with a diameter of 1200mm and a thickness of 18mm, and the concrete grade is C60. The size of the rib in this embodiment is designed in the following way:

[0047] The length of the rib is: H=1200*20%=240mm;

[0048] The width of the rib is: h=240*50%=120mm;

[0049] The thickness of the rib is: d=120*5%=6mm;

[0050] The distribution position of the ribs is as follows: steel pipe diameter D = 1200mm, 6 ribs are arranged within every 1.2m, and an angle of 60 degrees is formed between adjacent ribs in the steel pipe cross section of a group of ribs, see for details image 3 .

[0051] Weld the ribs and circular steel pipes according to the position in the figure.

Embodiment 2

[0053] In this embodiment, the steel pipe concrete column of the Hong Kong Center Building is taken as an example, wherein the steel pipe concrete column is a square steel pipe, and the long and short side dimensions of the steel pipe are the same as 800mm, and the thickness is 20mm. The size of the rib in this embodiment is designed in the following way:

[0054] The length of the rib is: H=800*20%=160mm;

[0055] The width of the rib is: h=160*50%=80mm;

[0056] The thickness of the rib is: d=80*5%=4mm,

[0057] According to the convenience of welding, the thickness of the rib in this embodiment is 6mm, i.e. d=6mm;

[0058] The distribution position of the ribs is as follows: the cross-sectional size of the square steel pipe is 800mm*800mm, and 6 ribs are arranged in every 1.2m height, and the six ribs generally form a spiral distribution in the height direction. For details, see Figure 4 . In the cross-section of a group of ribs, there are four ribs located at the four...

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Abstract

The invention relates to a threaded obliquely-arranged ribbed steel tube concrete column and a design method thereof. The threaded obliquely-arranged ribbed steel tube concrete column comprises a ribbed steel tube and concrete, the ribbed steel tube comprises a steel tube and a plurality of ribs fixed on the steel tube, the multiple ribs are fixed on the steel tube in a spiral ascending mode, andthe vertical distance between the adjacent ribs is 0.15-0.3 m. The design method comprises the following steps that the size and shape of the steel tube for engineering are determined, and the steel tube is manufactured; the ribs are produced according to the shape and the size of the steel tube, as for the circular steel tube, the length of the ribs is 20% of the diameter of the circular steel tube, and as for the rectangular steel tube, the length of the ribs is 20% of length of the rectangular short edges, and the width of the ribs is 50% of the length of the ribs; and the produced ribs arewelded to the inner wall of the steel tube in a spiral ascending mode. The problems that coarse aggregate is accumulated at the lower part due to too fast sinking of the coarse aggregate at the maintenance stage after concrete pouring is completed, the concrete segregation phenomenon is caused, consequently, the compactness of the concrete is affected, the strength of the concrete is reduced andthe steel tube concrete column cannot exert excellent performance are solved.

Description

technical field [0001] The invention relates to the field of steel pipe concrete columns, in particular to a steel pipe concrete column with ribs arranged obliquely in the reinforced concrete column and a design method thereof in order to reduce the sinking of coarse aggregate in the maintenance stage. Background technique [0002] With the development of construction engineering and the acceleration of urban modernization, in order to meet the development needs of long-span bridges and high-rise buildings, concrete-filled steel tube structures have entered people's field of vision, among which concrete-filled steel tube columns are the most widely used. The concrete-filled steel tube column effectively combines steel and concrete, which is beneficial to improve the performance of the structure. In order to give full play to the advantages of the two materials, it is necessary to pay attention to the quality of the concrete. However, in the curing stage after the concrete is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04C3/34E01D19/02
CPCE04C3/34E01D19/02
Inventor 王雪雅张一鸣杨雪晴牛犇王骏林
Owner HEBEI UNIV OF TECH
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