Reinforced composite steel pipe concrete column

Abstract

The utility model discloses a reinforced composite steel pipe concrete column which comprises an inner steel pipe. The outer steel pipe is sleeved outside the inner steel pipe; the reinforcement cage is sleeved outside the outer steel pipe and is fixedly connected with the outer steel pipe through profile steel; and concrete is poured in gaps between the inner steel pipe and the outer steel pipe, between the outer steel pipe and the reinforcement cage and on the outer side of the reinforcement cage. According to the concrete column, the structural steel is arranged between the steel pipe and the reinforcement cage, so that the mechanical property of concrete outside the steel pipe can be improved, and the deformation performance and stress performance of concrete inside and outside the steel pipe can be better coordinated.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of building structure, specifically is a kind of reinforced composite steel pipe concrete column. BACKGROUND

[0002] As an important combination structure form, steel pipe concrete gives full play to the material advantage through the constraint effect of steel pipe on concrete and the collaborative stress of two materials, with the characteristics of high bearing capacity, good ductility etc. Engineering practice has proved that it has significant economic benefits and architectural effects. To further improve the structural performance, steel pipe concrete superposed structure is proposed. However, with the increase of building height, the self-weight of structure increases significantly, which may lead to brittle shear failure of low-level column. Therefore, reducing the self-weight under the premise of ensuring the safety of structure becomes a key issue.

[0003] Compared with solid column, hollow column has the advantages of small inertia force under the action of earthquake, light weight, wide section and strong bending and torsional resistance, which can significantly reduce the self-weight of structure. Related research shows that hollow steel pipe concrete superposed column has the problems of large mechanical property difference between outer reinforced concrete and inner hollow steel pipe concrete, poor collaborative deformation capacity, etc., which limits its further promotion and application. To improve the mechanical property of outer reinforced concrete of hollow steel pipe concrete superposed column and reduce the mechanical property difference between inner steel pipe concrete, it is the key to improve the overall performance of superposed column. SUMMARY

[0004] Therefore, in order to solve the above problems, the utility model provides a kind of reinforced composite steel pipe concrete column, the steel pipe concrete column is set up section steel between outer steel pipe and reinforced cage, and the steel pipe and reinforced cage are connected by section steel, the mechanical property of concrete outside pipe can be improved by the constraint effect of section steel flange, to better cooperate the deformation performance and stress performance of inner and outer concrete of steel pipe, and inner steel pipe is set up, to avoid filling concrete inside, so as to realize hollow column structure, avoid some problems existing in solid concrete column.

[0005] The utility model is realized by constructing a kind of reinforced composite steel pipe concrete column, including inner steel pipe;

[0006] Outer steel pipe is set in the outer portion of inner steel pipe;

[0007] Reinforced cage is set in the outer portion of outer steel pipe and is kept connected and fixed with outer steel pipe by section steel;

[0008] Pour concrete in the gap between inner steel pipe and outer steel pipe, outer steel pipe and reinforced cage and the outside of reinforced cage.

[0009] Preferably, the inner steel pipe, the outer steel pipe, the steel reinforcement cage and the section steel are connected with their end parts flush, and the cross-sectional centers of the inner steel pipe, the outer steel pipe and the steel reinforcement cage are kept coincident.

[0010] Preferably, the section steel is H-shaped steel, one end flange of which is connected with the outer steel pipe by welding, and the other end flange is fixed by penetrating the steel reinforcement cage with a bolt.

[0011] Preferably, the welding is plug welding.

[0012] Preferably, the section steel is ordinary steel or high-strength steel.

[0013] Preferably, the outer steel pipe has a square, hexagonal or octagonal cross-sectional shape, and the inner steel pipe has a circular or square cross-sectional shape.

[0014] Preferably, the steel reinforcement cage is ordinary steel bar, high-strength steel bar or prestressed steel bar.

[0015] Preferably, the concrete is ordinary concrete, high-strength concrete or self-compacting concrete.

[0016] Compared with the prior art, the utility model has the following advantages:

[0017] 1. Mechanical property improvement: the steel pipe concrete column sets the section steel between the outer steel pipe and the steel reinforcement cage, effectively utilizes the constraint effect of the section steel flange, and significantly improves the mechanical property of the concrete outside the pipe. Compared with the hollow steel pipe concrete composite column, the new type of composite column has a section steel concrete outside the pipe, has a small difference in mechanical property with the core steel pipe concrete, can better play the deformation property and stress property of the core steel pipe concrete, enables the concrete outside the pipe to play its material characteristics more efficiently when bearing load, enhances the bearing capacity and stability of the whole steel pipe concrete column, and thus can meet higher structural design requirements.

[0018] 2. Synergistic deformation and stress property optimization: the connection of the section steel enables the steel pipe and the steel reinforcement cage to work better in synergy, and thus optimizes the deformation property and stress property of the inner and outer concrete of the steel pipe. In the stress process, the steel pipe, the steel reinforcement cage and the inner and outer concrete can more coordinately share the load, reduces the occurrence of stress concentration, and improves the integrity and reliability of the structure. This not only helps to improve the performance of the structure in the normal use state, but also enhances the disaster resistance of the structure in the extreme load condition (such as earthquake, strong wind, etc.), and guarantees the safe use of the building.

[0019] 3. Realize the hollow column structure advantage: through setting the inner steel pipe, avoid filling the concrete to the inside, successfully realize the hollow column structure. Compared with the solid concrete column, the hollow column has the advantages of light weight, small inertia force, which is remarkable in reducing the structure deadweight. On the one hand, the reduced deadweight can reduce the bearing pressure of the foundation, reduce the construction cost; on the other hand, under the dynamic action such as earthquake, the smaller inertia force can effectively reduce the seismic response of the structure, improve the seismic performance of the structure, at the same time, it is also beneficial to improve the overall stability and safety of the building, which provides a more optimal structure solution for the building form which is sensitive to deadweight, such as high-rise building, large-span structure, etc. BRIEF DESCRIPTION OF DRAWINGS

[0020] The accompanying drawings are included to provide a further understanding of the present application, and constitute a part of the specification, and together with the specific embodiments of the present application, serve to explain the present application, but do not constitute any limitation on the present application. In the drawings:

[0021] Figure 1 It is a structure plane schematic view that the outer steel pipe is square and the inner steel pipe is circular in the present application;

[0022] Figure 2 It is a structure plane schematic view that the outer steel pipe is square and the inner steel pipe is square in the present application;

[0023] Figure 3 It is a structure plane schematic view that the outer steel pipe is hexagonal and the inner steel pipe is circular in the present application;

[0024] Figure 4 It is a structure plane schematic view that the outer steel pipe is hexagonal and the inner steel pipe is square in the present application;

[0025] Figure 5 It is a structure plane schematic view that the outer steel pipe is octagonal and the inner steel pipe is circular in the present application;

[0026] Figure 6 It is a structure plane schematic view that the outer steel pipe is octagonal and the inner steel pipe is square in the present application;

[0027] In the drawings: 1 is the inner steel pipe, 2 is the core concrete, 3 is the outer steel pipe, 4 is the H-shaped steel, 5 is the steel cage, 6 is the bolt, 7 is the inner layer concrete, and 8 is the outer layer concrete. DETAILED DESCRIPTION

[0028] The technical scheme of the utility model will be further specifically explained below by means of specific embodiments and in conjunction with the drawings; it should be understood that the specific embodiments described herein are only used for illustrating and explaining the utility model and should not be regarded as any limitation on the utility model; the drawings in the utility model are only used for describing the embodiments and facilitating understanding and use and should not be regarded as any relevant limitation on the utility model.

[0029] It should be noted that the structure, proportion, size and the like shown in the drawings of the present specification are only used to cooperate with the content disclosed in the specification so as to be understood and read by those skilled in the art and should not be used to limit the limiting conditions of the utility model that can be implemented. Any modification of structure, change of proportion relationship or adjustment of size, which does not affect the effects and purposes that can be achieved by the utility model, should still fall within the scope of the technical content disclosed by the utility model.

[0030] As described in the background, the existing hollow steel pipe concrete composite column has problems such as large difference in mechanical properties between the outer layer reinforced concrete and the inner layer hollow steel pipe concrete, poor collaborative deformation capacity and the like, and cannot fully play the characteristics of high core concrete strength and good ductility.

[0031] Based on the above reasons, in order to solve the above problems, the utility model provides the following technical scheme:

[0032] Embodiment 1,

[0033] Please refer to the drawings Figure 1 ~Appendix Figure 6 As shown in the drawings, a reinforced composite steel pipe concrete column comprises an inner steel pipe 1;

[0034] An outer steel pipe 3 is sleeved outside the inner steel pipe 1;

[0035] A steel reinforcement cage 5 is sleeved outside the outer steel pipe 3 and is connected and fixed with the outer steel pipe 3 through the section steel.

[0036] The concrete is poured in the gaps between the inner steel pipe 1 and the outer steel pipe 3, the outer steel pipe 3 and the steel reinforcement cage 5 and outside the steel reinforcement cage 5.

[0037] In the embodiment, the concrete poured in the gap between the inner steel pipe 1 and the outer steel pipe 3 is core concrete 2, the concrete poured in the gap between the outer steel pipe 3 and the steel reinforcement cage 5 is inner layer concrete 7, and the concrete built outside the steel reinforcement cage is outer layer concrete 8.

[0038] In the embodiment, the section steel is H-shaped steel 4, and the cross-sectional shape is H-shaped.

[0039] Among them, the inner steel pipe 1 and the outer steel pipe 3 can be prefabricated in the factory, and the core concrete 2 is poured, the steel reinforcement cage 5 is bound at the construction site, and the outer concrete is poured on site.

[0040] Example 2,

[0041] Based on the basis of example 1, in order to ensure the expandable height of the concrete column, and ensure the strength in the earthquake, the inner steel pipe 1, the outer steel pipe 3, the steel reinforcement cage 5 and the profile steel connecting rear end are flush, the cross section center of the inner steel pipe 1, the outer steel pipe 3 and the steel reinforcement cage 5 keeps coinciding.

[0042] Example 3,

[0043] Based on the basis of example 1, in order to ensure the strength of the concrete column, the profile steel is ordinary steel or high-strength steel.

[0044] In this embodiment, the steel reinforcement cage 5 is ordinary steel or high-strength steel or prestressed steel.

[0045] In this embodiment, the concrete is ordinary concrete or high-strength concrete or self-compacting concrete.

[0046] Example 4,

[0047] Based on the basis of example 1, one end of the H-shaped steel 4 is connected to the outside of the outer steel pipe 3 by welding, and the other end is connected by the stud 6 penetrating through the steel reinforcement cage 5 and being fixed, such as the hole in the lower flange of the H-shaped steel 4, the stud 6 penetrates through the hole and the steel reinforcement cage 5 to be connected, and finally the concrete is poured to realize the fixation.

[0048] The stud 6 arranged on the outer side of the H-shaped steel 4 can strengthen the bonding between the flange and the concrete, and slow down the peeling of the concrete on the outer side of the flange; the inner side flange of the H-shaped steel 4 arranged outside the steel pipe can play the role of thickening the flat area of the steel pipe after large deformation of the component or peeling of the concrete outside the pipe, and the web can be used as a reinforcing rib of the steel pipe to prevent or delay the outward buckling of the steel pipe. At the same time, under the action of horizontal load, the flange of the H-shaped steel 4 can be used as "longitudinal reinforcement" to resist bending moment and improve the seismic performance of the component.

[0049] Example 5,

[0050] Based on the basis of example 4, in order to reduce the influence of welding on the mechanical properties of the steel pipe, ensure that there is no weld at the rear end after welding, and facilitate the subsequent welding between the steel pipes, the welding method is plug welding.

[0051] Example 6,

[0052] Please refer to the attached Figure 1 The attached Figure 6 , based on the basis of example 1, in order to facilitate the connection of the flange part at both ends of the H-shaped steel between the outer steel pipe and the steel reinforcement cage, the cross-sectional shape of the outer steel pipe 3 is square or hexagonal or octagonal, and the cross-sectional shape of the inner steel pipe 1 is circular or square.

[0053] The above description is directed to the detailed description of the preferred feasible embodiment of the present application, but the embodiment is not used to limit the patent application range of the present application, and any equivalent change or modification change completed under the technical spirit of the present application should belong to the patent range covered by the present application.

Claims

1. A reinforced composite steel-concrete composite column, characterized in that: include Inner steel pipe; The outer steel pipe is fitted over the inner steel pipe; The reinforcing cage is fitted over the outer steel pipe and is fixed to the outer steel pipe by structural steel. Concrete is poured in the gaps between the inner and outer steel pipes, between the outer steel pipe and the reinforcing cage, and on the outside of the reinforcing cage.

2. The reinforced composite steel-concrete composite column according to claim 1, characterized in that: The inner steel pipe, outer steel pipe, reinforcing cage, and structural steel are connected at flush ends, and the cross-sectional centers of the inner steel pipe, outer steel pipe, and reinforcing cage coincide.

3. The reinforced composite steel-concrete composite column according to claim 1, characterized in that: The steel section is an H-beam, with one flange connected to the outside of the outer steel pipe by welding, and the other flange passing through the reinforcing cage and being fixed by studs.

4. The reinforced composite steel-concrete composite column according to claim 3, characterized in that: The welding method is plug welding.

5. A reinforced composite steel-concrete composite column according to any one of claims 1 to 4, characterized in that: The steel profile is made of ordinary steel or high-strength steel.

6. The reinforced composite steel-concrete composite column according to claim 1, characterized in that: The outer steel pipe has a square, hexagonal, or octagonal cross-section, while the inner steel pipe has a circular or square cross-section.

7. The reinforced composite steel-concrete composite column according to claim 1, characterized in that: The steel cage is made of ordinary steel bars, high-strength steel bars, or prestressed tendons.

8. The reinforced composite steel-concrete composite column according to claim 1, characterized in that: The concrete is ordinary concrete, high-strength concrete, or self-compacting concrete.

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