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Concrete-filled steel tube bundle composite shear wall with internally-arranged composite confined concrete columns

A technology for confining concrete and CFST, which is applied to walls, buildings, building components, etc., can solve the problems of insufficient utilization of fiber reinforced composite pipes and concrete properties, complicated construction technology, poor seismic performance, etc., to improve the ultimate bearing capacity. Capacity and ductility index, good seismic performance, and the effect of improved shear resistance

Pending Publication Date: 2020-12-25
SOUTH CHINA UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing ordinary concrete shear walls have the disadvantages of poor seismic performance and poor ductility. Although the invention patent with the publication number CN105507456A adds measures such as fiber-reinforced composite material tubes and steel bars inside the concrete wall to enhance its seismic performance, there are still The following disadvantages: ①The external concrete wall is still prone to large cracks and concrete crushing; ②The properties of fiber reinforced composite pipes and concrete cannot be fully utilized; ③It must be constructed by cast-in-place, and the construction process is more complicated

Method used

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  • Concrete-filled steel tube bundle composite shear wall with internally-arranged composite confined concrete columns
  • Concrete-filled steel tube bundle composite shear wall with internally-arranged composite confined concrete columns
  • Concrete-filled steel tube bundle composite shear wall with internally-arranged composite confined concrete columns

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Experimental program
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Effect test

Embodiment 1

[0042] see figure 1 and figure 2 , this embodiment is an in-line steel tube bundle composite shear wall with built-in fiber-reinforced composite material tubes. A plurality of steel pipes 3 in the steel tube bundle are welded to each other in sequence, arranged in a line, at the wall end of the composite shear wall A fiber-reinforced composite material pipe 1 is arranged in the steel pipe 3 at the place. Among them, the fiber-reinforced composite material pipe 1 can be a carbon fiber-reinforced composite material pipe (referred to as CFRP pipe), a glass fiber-reinforced composite material pipe (referred to as GFRP pipe), an aramid fiber-reinforced composite material pipe (abbreviated as AFRP pipe), a basalt fiber pipe ( Referred to as BFRP pipe) in any one.

[0043] In order to further improve the mechanical performance of the shear wall, fiber-reinforced composite material pipes 1 are also arranged in the steel pipes 3 near both ends.

Embodiment 2

[0045] see image 3 and Figure 4 The difference between this embodiment and Embodiment 1 is that several steel pipes 3 of this embodiment are welded in sequence, and the steel pipe bundles are arranged in a special shape, such as an L-shaped arrangement or a T-shaped arrangement, that is, there are two walls. A fiber-reinforced composite material pipe 1 is respectively arranged in the steel pipe 3 at the end and at the intersection of two wall piers, and the other details are the same as in Embodiment 1.

Embodiment 3

[0047] see Figure 5 , the difference between this embodiment and embodiment 1 is that when the load is large, in order to meet the force requirements, the steel pipe 3 located at the end of the shear wall body can be enlarged, so that the size of the steel pipe 3 located here That is, the inner diameter is larger than that of the steel pipe 3 at other positions, and the steel pipe 3 here is defined as an end column, and the size of the fiber-reinforced composite material pipe 1 arranged in the end column, that is, the inner diameter, is also larger than that at other positions. In this way, the effect of further enhancing the bearing capacity and deformation capacity of the end of the composite shear wall of the steel tube concrete bundle can be achieved, and other details are the same as in Embodiment 1.

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Abstract

The invention discloses a concrete-filled steel tube bundle composite shear wall with internally-arranged composite confined concrete columns. The concrete-filled steel tube bundle composite shear wall comprises a composite shear wall body formed by steel tube bundles, the steel tube bundles comprise a plurality of steel tubes, and fiber reinforced composite tubes are fixedly arranged in the steeltubes at the end parts of the composite shear wall body; and when the wall body of the composite shear wall is provided with at least two wall limbs, fiber reinforced composite material tubes are fixedly arranged in the steel tubes located at the intersections of the wall limbs, and each steel pipe and each fiber reinforced composite material tube are filled with concrete. Fiber reinforced composite material confined concrete has good deformation performance and ductility and has the characteristic of obvious later-period rigidity at the same time, the fiber reinforced composite material confined concrete is arranged at one or more positions, such as the wall end, the intersection of two wall limbs and the intersection of the multiple wall limbs, of a deformed or heavily stressed part inthe steel tube bundle composite shear wall; and the fiber reinforced composite material tube is filled with the concrete, so that the composite material tube has the characteristics of high bearing capacity and good ductility.

Description

technical field [0001] The invention relates to the technical field of new composite structures, in particular to a steel tube concrete bundle composite shear wall with built-in composite constrained concrete columns. Background technique [0002] A shear wall is a wall in a house or structure that mainly bears horizontal loads and vertical loads (gravity) caused by wind loads or earthquakes to prevent structural shear (shear) damage, and is generally made of reinforced concrete. Existing ordinary concrete shear walls have the disadvantages of poor seismic performance and poor ductility. Although the invention patent with the publication number CN105507456A adds measures such as fiber-reinforced composite material tubes and steel bars inside the concrete wall to enhance its seismic performance, there are still The following disadvantages: ①The external concrete wall is still prone to large cracks and concrete crushing; ②The properties of fiber-reinforced composite pipes and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04B2/56E04B2/58E04B2/62
CPCE04B2/56E04B2/562E04B2/58E04B2/62
Inventor 陈光明任凤鸣周勇臣
Owner SOUTH CHINA UNIV OF TECH
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