Carbon fiber concrete filled steel tube combination column structure with built-in X-shaped CFRP (carbon fiber reinforced plastic) profiles

Abstract

The utility model provides a carbon fiber concrete filled steel tube combination column structure with built-in X-shaped CFRP (carbon fiber reinforced plastic) profiles. The carbon fiber concrete filled steel tube combination column structure comprises a CFRP profile X-shaped inner column, carbon fiber angle steel, a carbon fiber batten plate, a steel tube, a carbon fiber reinforcement layer and filling concrete. An X-shaped inner column is composed of four pieces of carbon fiber equilateral angle steel, an outer constraint frame is composed of carbon fiber angle steel located at the four corners of the core column and batten plates on the four sides, the outer side face of a steel pipe is wrapped with a carbon fiber reinforced composite material in a surrounding mode, the X-shaped inner column, the outer constraint frame and the outer steel pipe are concentrically and coaxially arranged, and a cavity formed in the middle is filled with concrete. According to the utility model, the advantages of the concrete filled steel tube and the carbon fiber reinforced composite material are combined, the bearing capacity and the deformation resistance of the structure are improved, the dead weight of the structure is reduced, the manufacturing and the construction are convenient, the ductility is large, the anti-seismic property is good, and the anti-fatigue and anti-impact toughness is strong, and the carbon fiber reinforced composite material can be widely used in important structures such as large bridges, high-rise buildings, subway stations and the like.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of carbon fiber steel pipe concrete composite column structures of built-in X-shaped CFRP section, belong to the technical field of composite structure. BACKGROUND

[0002] With the acceleration of urbanization, population gradually gathers to city, people's demand for high-rise and super high-rise residential, office building is increasing, in recent years, a large number of high-rise and super high-rise buildings are built. Concrete-filled steel tubular structure is to pour concrete in steel pipe, steel pipe forms constraint to core concrete, concrete is improved in strength and durability under three-way compression, due to the advantages of large bearing capacity, good ductility, strong energy dissipation capacity and high seismic performance of concrete-filled steel tubular structure, it is widely used in the construction of high-rise and super high-rise buildings. With the continuous emergence of high-performance building materials, lightweight and high-strength carbon fiber reinforced composite materials have been widely used in large-scale bridge, high-rise building, subway tunnel, airport terminal building and other large-scale engineering structures. Carbon fiber material has high strength, light weight, strong fatigue resistance and good impact toughness. By taking full advantage of the advantages of concrete-filled steel tubular structure and carbon fiber material, the combination of concrete-filled steel tubular structure with carbon fiber material is born. The arrangement of carbon fiber material in concrete-filled steel tubular structure improves the structural bearing capacity, reduces the structural self-weight, and enhances the seismic capacity, fatigue resistance, impact toughness, which can be used for important structures such as large bridge piers and high-rise building bottom heavy load columns. SUMMARY

[0003] The utility model provides a kind of carbon fiber steel pipe concrete composite column structures of built-in X-shaped CFRP section, can reduce structure self-weight, improve structural bearing capacity, fatigue strength, seismic performance and impact toughness.

[0004] The utility model adopts the following technical scheme:

[0005] A kind of carbon fiber steel pipe concrete composite column structures of built-in X-shaped CFRP section, the composite column includes CFRP section X-shaped inner column, carbon fiber angle steel, carbon fiber patch, steel pipe, carbon fiber reinforcing layer, filling concrete. The CFRP section X-shaped inner column is coincident with the centroid of external steel pipe, carbon fiber angle steel is located in the four corners of steel pipe concrete inner core column, carbon fiber reinforcing layer is arranged around outer steel pipe, which reduces the structural self-weight and fully utilizes the material strength.

[0006] The CFRP profile X-shaped inner column is composed of four carbon fiber equal angle steels, the angle steels are symmetrically arranged along the column axis, the included angle between the angle steel and the column axis is 45°, the left and right limbs of the angle steel are symmetric about the column axis, and the inner column section is X-shaped.

[0007] The carbon fiber angle steel is located at four corners of the concrete-filled steel tube core column, the patch plates are arranged at intervals of 1m along the length direction of the angle steel, and the patch plates are fixedly connected with the limbs of the angle steel through an adhesive around the square section formed by the carbon fiber angle steels.

[0008] The outer steel tube can be selected from square section or circular section steel tubes, the outer steel tube is concentrically arranged with the carbon fiber constraint frame and the X-shaped inner column, and the outer steel tube and the carbon fiber constraint frame can be filled with concrete.

[0009] The filled concrete can be high-performance concrete such as self-compacting concrete, high-strength concrete and fiber concrete, and the concrete is compacted by a vibrating rod.

[0010] The advantages and beneficial effects of the utility model are as follows: ①the CFRP profile X-shaped inner column increases the bending stiffness and torsional stiffness of the column section, the ductility and energy dissipation capacity of the column are enhanced, the load bearing capacity and seismic performance of the column are improved, the structure weight is reduced, the fatigue resistance and impact toughness of the column are enhanced by combining the advantages of the CFRP profile; ②the carbon fiber angle steel at four corners of the core column and the patch plates at four edges form an external constraint frame, the core concrete is constrained from transverse deformation, the core concrete is in a three-way compression state, and the compressive strength and plastic deformation capacity of the concrete are improved; ③the steel tube is wrapped by the carbon fiber reinforced composite material, the steel tube and the core concrete are constrained, the steel tube is prevented from buckling before the core concrete reaches the limit compression strain, the three-way compression concrete is used to improve the ultimate load bearing capacity and ductility of the column; ④the steel tube, the core concrete, the carbon fiber constraint frame and the CFRP profile X-shaped inner column form a whole to bear the axial pressure and horizontal load of the column, and have the advantages of large load bearing capacity, good seismic performance and strong anti-deformation capacity. Attached Figure Description

[0011] Figure 1 This is a schematic plan view of a carbon fiber square steel tube concrete composite column structure with built-in X-shaped CFRP profile according to this utility model.

[0012] Figure 2 This is a schematic plan view of a carbon fiber round steel tube concrete composite column structure with built-in X-shaped CFRP profile according to this utility model.

[0013] Figure 3 This is a three-dimensional schematic diagram of a carbon fiber steel tube concrete composite column structure with built-in X-shaped CFRP profile according to the present invention.

[0014] In the diagram: 1 is a CFRP profile X-shaped inner column; 2 is carbon fiber angle steel; 3 is carbon fiber gusset plate; 4 is steel pipe; 5 is carbon fiber reinforcement layer; 6 is filled concrete. Detailed Implementation

[0015] The structural features and implementation process of this utility model will be further described in detail below with reference to the accompanying drawings, so as to facilitate the application of relevant engineering technicians in the actual engineering of carbon fiber steel tube concrete composite structures.

[0016] This utility model provides a carbon fiber steel tube concrete composite column structure with built-in X-shaped CFRP profile. The composite column includes an X-shaped inner column 1 with CFRP profile, a carbon fiber angle steel 2, a carbon fiber gusset plate 3, a steel pipe 4, a carbon fiber reinforcement layer 5, and filling concrete 6.

[0017] The specific implementation steps are as follows:

[0018] The four carbon fiber equilateral angle steels that make up the X-shaped inner column are processed and manufactured according to the design dimensions. The connecting partitions used to connect the two legs of the adjacent angle steels are set at intervals of 2m along the length of the angle steel. The connecting partitions of the left and right legs of the X-shaped inner column are set alternately at intervals, with a spacing of 1m between the connecting partitions of the left and right legs. The connecting partitions are bonded and fixed to the carbon fiber angle steels with adhesive.

[0019] The base of the X-shaped inner column is bonded and fixed to the carbon fiber plate of the column foot. The carbon fiber plate is pasted on the upper surface of the column foot steel plate. The X-shaped inner column is symmetrical along the column axis. The centroid of the X-shaped section coincides with the centroid of the column. The carbon fiber angle steel is inclined at an angle of 45° with the column axis.

[0020] Four carbon fiber angle steels are located at the four corners of the core column. Connecting plates are arranged at 1m intervals along the length of the angle steels. Adhesive is used to bond and fix the connecting plates to the carbon fiber angle steels. The carbon fiber angle steels and connecting plates constitute the external constraint frame of the core column, providing restraint to the core concrete. The carbon fiber constraint frame is arranged concentrically and coaxially with the X-shaped inner column. Adhesive is used to bond and fix the bottom surface of the carbon fiber constraint frame to the carbon fiber plate at the column base.

[0021] The outer steel pipe can be square section or round section, and carbon fiber cloth is wrapped around the outer side of the steel pipe, and the carbon fiber cloth is bonded with the steel pipe by an adhesive. The steel pipe and the X-shaped inner column are concentrically arranged, and the steel pipe is welded and fixed with the column foot steel plate by using fillet weld.

[0022] The cavity between the outer steel pipe and the carbon fiber constraint frame and the X-shaped inner column is poured with concrete, and the concrete can be high-performance concrete such as self-compacting concrete, high-strength concrete and fiber concrete, and the concrete is vibrated and compacted by using a vibrating rod and is cured to standard strength.

[0023] The outer steel pipe, the carbon fiber constraint frame and the X-shaped inner column are staggered and spliced in the vertical direction of the column, and the beam-column joint area should be avoided.

[0024] The utility model comprehensively has the advantages of steel pipe concrete and carbon fiber reinforced composite material, has the characteristics of big bearing capacity, good anti-seismic performance, strong anti-fatigue and impact toughness, and can be used for important engineering structures such as large bridge, high-rise building and subway station.

Claims

1. A carbon fiber reinforced concrete composite column structure with built-in X-shaped CFRP section, comprising CFRP section X-shaped inner column, carbon fiber angle steel, carbon fiber patch plate, steel pipe, carbon fiber reinforced layer, filled concrete, characterized in that: The X-shaped inner column is composed of four carbon fiber angle steels, and the carbon fiber angle steels located at four corners of the core column and the four edge plates constitute an external restraint frame. The outer side of the steel pipe is wrapped with carbon fiber reinforced composite material. The X-shaped inner column, the external restraint frame and the outer steel pipe are arranged concentrically and coaxially, and the cavity formed in the middle is filled with concrete.

2. The carbon fiber steel tube filled concrete composite column structure with built-in X-shaped CFRP section according to claim 1, characterized in that: The inner column section is X-shaped, and the carbon fiber angle steels are symmetrically arranged along the column axis at an angle of 45°. The connecting partition plates of the left and right limbs of the X-shaped inner column are alternately and spacedly arranged along the column axis at an interval of 1m, and are fixed by adhesive.

3. The carbon fiber steel tube filled concrete column structure with built-in X-shaped CFRP profile according to claim 1, characterized in that: The external restraint frame is composed of carbon fiber angle steels located at four corners of the core column and the edge plates. The carbon fiber angle steels and the edge plates are fixed by adhesive.

4. The carbon fiber steel tube filled concrete column structure with built-in X-shaped CFRP profile according to claim 1, characterized in that: The outer side of the steel pipe is wrapped with carbon fiber reinforced composite material, and the two are bonded by adhesive. The inside of the steel pipe is filled with concrete, and the concrete can be high-performance concrete such as self-compacting concrete, high-strength concrete and fiber concrete.

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