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Concrete-filled steel tube column with ECC reinforced protective layer and FRP confined concrete core column and construction method and application of concrete-filled steel tube column

A technology for concrete-filled steel tubular columns and restrained concrete, which is applied in chemical instruments and methods, columns, buildings, etc., can solve the problems of steel tube buckling failure, insufficient corrosion resistance and fire resistance, and achieve local buckling suppression and enhancement of strength and deformation capacity. , make full use of the effect

Pending Publication Date: 2021-07-09
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned concrete columns with FRP-confined core columns still have the following disadvantages: the steel pipe is prone to local buckling failure; in addition, due to the exposed steel pipe, its corrosion resistance and fire resistance are insufficient

Method used

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  • Concrete-filled steel tube column with ECC reinforced protective layer and FRP confined concrete core column and construction method and application of concrete-filled steel tube column
  • Concrete-filled steel tube column with ECC reinforced protective layer and FRP confined concrete core column and construction method and application of concrete-filled steel tube column
  • Concrete-filled steel tube column with ECC reinforced protective layer and FRP confined concrete core column and construction method and application of concrete-filled steel tube column

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Embodiment 1

[0031] The concrete-filled steel tube column with ECC reinforced protective layer and FRP-confined concrete core column includes ECC layer, steel tube layer, concrete layer, FRP tube layer, and core concrete core column arranged in sequence from outside to inside.

[0032] The thickness of the ECC layer is 5-50mm, the thickness of the steel pipe layer is 2-30mm, the thickness of the concrete layer is 20-200mm, the thickness of the FRP pipe layer is 1-20mm, and the outer diameter of the core concrete core column is 50-1000mm. In this embodiment, the thickness of the ECC layer is 25mm, the thickness of the steel pipe layer is 15mm, the thickness of the concrete layer is 100mm, the thickness of the FRP pipe layer is 15mm, and the outer diameter of the core concrete core column is 500mm.

[0033] The material of the concrete layer is ordinary concrete, high-strength concrete, expansive concrete, fly ash concrete, lightweight aggregate concrete, recycled aggregate concrete, fiber co...

Embodiment 2

[0050] The concrete-filled steel tube column with ECC reinforced protective layer and FRP-confined concrete core column includes ECC layer, steel tube layer, concrete layer, FRP tube layer, and core concrete core column arranged in sequence from outside to inside.

[0051] In this embodiment, the material of the concrete layer is ordinary concrete, and the material of the core concrete core column is high-strength concrete; the reinforced grid is an FRP (Fiber reinforced polymer) grid; Three times, the edges of adjacent reinforced grids overlap each other, and the overlapping length is 3-4 times the grid spacing of the reinforced grid; the ECC layer is wrapped in the outside of the steel pipe layer with variable thickness; the cross section of the steel pipe layer is square, The cross-section of the FRP tube layer is circular, the cross-section of the ECC layer is square, and the geometric centroids of the three coincide.

[0052] The parts not mentioned in this embodiment are...

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Abstract

The invention relates to a concrete-filled steel tube column with an ECC reinforced protective layer and an FRP confined concrete core column. The concrete-filled steel tube column comprises an ECC layer, a steel tube layer, a concrete layer, an FRP tube layer and a core concrete core column which are sequentially arranged from outside to inside, wherein the concrete layer is made of common concrete, high-strength concrete, expansive concrete, fly ash concrete, lightweight aggregate concrete and the like, and the core concrete core column is made of common concrete, high-strength concrete, expansive concrete, fly ash concrete, lightweight aggregate concrete and the like. The invention further relates to a construction method of the concrete-filled steel tube column with the ECC reinforced protective layer and the FRP confined concrete core column and application of the concrete-filled steel tube column with the ECC reinforced protective layer and the FRP confined concrete core column. According to the concrete-filled steel tube column, the stress performance, the fire resistance and the durability can be improved, and the concrete-filled steel tube column belongs to the technical field of building structures.

Description

technical field [0001] The present invention relates to building structures, in particular to a concrete-filled steel tube column with an ECC reinforced protective layer and an FRP-confined concrete core column, and also relates to a construction method for a steel-filled concrete column with an ECC reinforced protective layer and an FRP-confined concrete core column. The invention relates to the application of a steel tube concrete column with an ECC reinforced protective layer and an FRP confined concrete core column. Background technique [0002] In recent years, CFST structures have been widely used in engineering practice due to their high bearing capacity, light weight, and convenient construction. However, when the diameter and thickness of the steel pipe are relatively large, especially when the cross-section of the steel pipe is non-circular, the restraint ability of the steel pipe to the inner core concrete is relatively weak. In response to this deficiency, some ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04C3/34E01D19/00B28B21/58B32B1/08B32B13/02B32B13/06B32B13/12B32B15/18B32B27/20E01D101/26
CPCB28B21/58B32B1/08B32B13/02B32B13/06B32B13/12B32B15/18B32B27/20B32B2262/0223E01D19/00E01D2101/26E04C3/34Y02A30/30
Inventor 陈光明熊焱许国忠李宁景
Owner SOUTH CHINA UNIV OF TECH
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