CN209637111U - A kind of concrete-filled double skin steel tube colossal column - Google Patents

Abstract

The invention relates to a hollow interlayer concrete-filled steel pipe giant column, which includes opposite tension stirrups, rectangular steel pipes, concrete, elevators, stairs and door openings. The two ends of the stirrup are bent and set tangentially to the inner wall of the rectangular steel pipe, fixed on the inner wall of the steel pipe by welding, and then high-strength concrete is poured between the two concentrically placed rectangular steel pipes. The utility model has high bearing capacity, good hysteretic performance, high lateral rigidity, good ductility, reasonable force, convenient construction, and light weight hollow interlayer concrete filled steel giant column. It reduces the wall thickness of steel pipes, avoids the difficulty of welding thick steel plates, and also solves the problem of vertical traffic in giant structures, and is suitable for high-rise building structures.

Description

A hollow interlayer concrete filled steel tube giant column

technical field

The utility model relates to the technical field of buildings, in particular to a hollow interlayer steel pipe concrete giant column.

Background technique

With the diversification and comprehensive development of building functions, the development trend of high-rise buildings in the world is to compete to launch super high-rise buildings with a height of more than 500m and giant structures of high-rise buildings that meet some special functions. The mega-frame structure has become a new type of high-efficiency lateral force-resisting system suitable for the development of super high-rise buildings. It consists of a mega frame structure as the main structure and a floor frame as the secondary structure. The giant frame is the main anti-lateral force system, and the floor frame only plays an auxiliary role and an energy dissipation function under a large earthquake, and is responsible for transmitting the vertical load of the floor to the main frame. Due to the small column spacing and small load of the secondary structure, the beam and column sections can be made very small, which is conducive to the rational use of the floor. It can be seen that the megastructure is a large-scale structural system with huge lateral stiffness and overall working performance.

As a vertical component of a giant frame structure, the giant column bears huge vertical loads and lateral loads such as earthquakes and winds. The giant column has good tensile, compression, bending and shear torsion resistance. And its characteristics have been paid more and more attention to, and more and more used in engineering practice. The steel-reinforced concrete mega-columns and steel-filled concrete mega-columns commonly used in engineering at present have the following technical deficiencies: 1. The cross-sectional size of mega-columns is large. A full-height strong connection method must be adopted to avoid separate arrangements similar to lattice columns to ensure the overall ductility of the columns, which will result in a large number of stirrup binding and formwork support work, which is inconvenient for construction; Due to the characteristics of the section form, the concrete near the centroid of the section cannot provide much flexural stiffness, and its flexural stiffness and flexural bearing capacity are low. At the same time, the construction of concrete-filled steel tube giant column joints is complicated, which limits its application.

Therefore, it is of great practical significance and social and economic value to develop an economical, practical, and convenient construction of hollow interlayer concrete-filled steel tube giant column structure.

Utility model content

The utility model solves the deficiencies of the prior art and provides a hollow interlayer concrete filled steel giant column with high bearing capacity, good anti-seismic performance and high lateral rigidity. The problem of insufficient confinement effect of steel pipes can greatly reduce the wall thickness of steel pipes, avoid the difficulty of welding thick steel plates, and at the same time solve the problem of vertical traffic in giant structures, and is suitable for high-rise building structures.

In order to achieve the above object, the utility model adopts the following technical solutions:

A hollow interlayer concrete-filled steel tube giant column, comprising an inner rectangular steel tube column, an outer rectangular steel tube column coaxially installed outside the inner rectangular steel tube column, and high-strength concrete poured in the interlayer between the inner and outer rectangular steel tube columns, the inner and outer rectangular steel tube columns A reinforcement cage is installed in the interlayer between the outer rectangular steel pipe columns, the inner and outer sides of the reinforcement cage are respectively fixed to the inner rectangular steel pipe column and the outer rectangular steel pipe column, and the inner and outer rectangular steel pipe columns are connected to each other through the reinforcement cage. The surface and the opposite surface of the outer rectangular steel pipe column are fixedly connected, the interlayer between the inner and outer rectangular steel pipe columns is embedded with pipelines, the hollow part of the inner rectangular steel pipe column is provided with elevators and/or stairs, and the steel bars The cage is a two-way double-stretch stirrup cage, and the two-way double-stretch stirrup cage includes a plurality of positioning longitudinal reinforcements arranged along the height direction to play a positioning role and a two-way double-stretching stirrup horizontally arranged on the positioning longitudinal reinforcement. On the positioning longitudinal reinforcement, multiple layers are arranged at a certain interval along the extending direction of the positioning longitudinal reinforcement, and the two ends of the two-way opposite tensioning reinforcement are respectively fixed on the opposite surfaces of the inner and outer rectangular steel pipe columns and the outer rectangular steel pipe column On the opposite side, the middle part of the two-way tension stirrup is fixed on the positioning longitudinal reinforcement.

Further, the diameter of the two-way paired stirrup is larger than the diameter of the positioning longitudinal bar.

Further, the distance between the two-way double-tensioned stirrups in the same layer in the horizontal direction is the same as the vertical distance between the two-way double-tensioned stirrups on the adjacent layer.

Further, the strength of the high-strength concrete is not lower than C60.

Further, the outer rectangular steel pipe column is assembled by an ordinary steel plate member and a hook steel plate member. The hook steel plate member includes a steel plate member and a hook fixed on the inside of the steel plate member. The ordinary steel plate member is welded on the On the two-way double-stretch stirrup cage, the connection between the two-way double-stretch stirrup cage and the hook steel plate member is provided with a transverse reinforcement corresponding to the position of the hook, and the transverse reinforcement is welded on the end of the two-way double-stretch stirrup , connecting the two-way double-stretch stirrups arranged in the same direction in the same layer into a whole, the preset installation position of the hook steel plate member on the two-way double-stretch stirrup cage is the welding construction activity area, and the welding construction activity area It is convenient for workers to carry out welding activities on the ordinary steel plate member and the two-way paired hoop cage. After the ordinary steel plate member is welded, the hooked steel plate member is fixed on the two-way paired hoop cage through the hook, and the The above-mentioned hook steel plate member is tangent to the outer side of the two-way double-tensioned stirrup cage.

Further, the hook steel plate member is provided with a plug welding slot at the position corresponding to the transverse steel bar at the hook, and after the hook steel plate member is hung on the horizontal steel bar of the two-way double-stretched hoop cage, it is then plug welded On the two-way double tension stirrup cage.

Further, both ends of the two-way double-stretched stirrups are bent, and the bent parts of the two-way double-stretched stirrups are connected tangentially to the inner walls of the inner and outer rectangular steel pipe columns, and the joints are welded to the inner and outer rectangular steel pipe columns .

Further, multiple sets of hooks are provided on the inner side of the hook steel plate member, and the position of each set of hooks is corresponding to each layer of two-way double-stretch stirrups on the two-way double-stretch stirrup cage. Each set of hooks includes Multiple hooks running along transverse reinforcement.

Further, the staircase is a prefabricated staircase or an integral cast-in-place reinforced concrete staircase.

After adopting the above technical scheme, the utility model has the following advantages:

1. The cross-section is developed, and the overall rigidity of the structure is large.

It can be seen from the section stiffness EI=Ebh ³ /12 of the rectangular section beam that the section stiffness is proportional to the cube of the section height. Since the hollow interlayer concrete-filled steel tube giant column is hollow, under the same self-weight, the cross-sectional size of the giant member is much larger than that of the conventional member, so its stiffness must be much greater than that of the ordinary structure.

2. The lateral rigidity is large, and it is evenly distributed along the height, and the force transmission path is clear, which is an ideal lateral force resistant structure system.

3. The system is flexible and diverse, which is conducive to earthquake resistance.

Megastructure is a large system. Megacolumns can form regular megastructures with different structural units in irregular buildings. Each component of the megastructure system has different seismic fortification standards, forming multiple lines of defense, which is beneficial to earthquake resistance . Where possible, other active energy dissipation devices can also be installed on the structure to ensure the safety of the structure.

4. It can make full use of the space inside the giant column to solve the vertical traffic of the giant structure. Installing elevators or stairs inside the giant column can effectively increase the usable area of the building. Large spaces or aerial terraces or gate openings can be arranged in the building to provide The flexibility of room arrangement creates favorable conditions.

5. The construction progress is fast.

The main structure of the giant structure system can be constructed first, and after the completion of the giant column, the substructure can be constructed simultaneously on each working face, which greatly shortens the construction period.

6. It has greater stability and higher performance.

Compared with the concrete-filled steel pipe column, the utility model has larger bending rigidity under the same self-weight condition due to the unfolded cross-section of the giant hollow interlayer concrete-filled steel pipe column. Under reasonable design conditions, the bearing capacity of the hollow interlayer concrete filled steel tube column is not lower than that of the corresponding solid steel tube concrete, and the mechanical properties are similar to those of the solid steel tube concrete. The steel tubes of solid steel-filled steel tube concrete are located on the periphery of the cross-section, and are prone to lose their stable bearing capacity under the action of fire, while the giant hollow interlayer concrete-filled steel tube columns are well protected by the concrete's wrapping effect on the inner tube, and can withstand a long period of time. without losing its stable bearing capacity.

Compared with the core tube of the shear wall, the utility model has a hollow interlayer concrete-filled steel pipe giant column, because of the restraint of the steel pipe and two-way and two-way double-direction hoops on the concrete, so that the core concrete is in a three-way compression state, which can increase the rigidity and strength of the giant column. Anti-lateral force; inner filling of high-strength concrete and two-way double-tensioned stirrups can prevent local buckling and reduce deformation, thereby enhancing the stability and ductility of steel pipes. Therefore, compared with the shear wall core tube, the giant column has superior lateral resistance, plastic deformation capacity, ductility and seismic performance. The advantage of the giant column is that it can strive for as spacious a practical space as possible, so that various auxiliary service spaces can be concentrated in the center of the plane, so as to achieve the effect of flexible division of office areas and convenient internal traffic.

In summary, the utility model has high bearing capacity, good hysteretic performance, high lateral stiffness, good ductility, reasonable force, convenient construction, and light weight hollow interlayer concrete-filled giant column, which not only makes up for the lack of confinement effect of steel pipes defects, and can greatly reduce the wall thickness of steel pipes, avoid the difficulty of welding thick steel plates, and also solve the problem of vertical traffic in giant structures, and are suitable for high-rise building structures.

Description of drawings

Fig. 1 is the structure schematic diagram of giant column and giant beam of the present utility model.

Fig. 2 is a schematic structural view of the giant column of the present invention applied to a high-rise building.

Fig. 3 is a schematic diagram of the external structure of the giant column of the present invention applied to a high-rise building.

Fig. 4 is a schematic cross-sectional structure diagram of the giant column of the present invention.

Fig. 5 is a perspective view of the inner rectangular steel pipe column of the utility model.

Fig. 6 is a structural schematic diagram of the steel plate component of the hook of the utility model.

Fig. 7 is a structural schematic diagram of the utility model steel cage.

In the figure: 1. Inner rectangular steel pipe column, 2. Outer rectangular steel pipe column, 3. Two-way opposite tension stirrup, 4. High-strength concrete, 5. Ordinary steel plate member, 6. Hook steel plate member, 7. Curved hook, 8. Locate longitudinal reinforcement, 9. Giant column, 10. Giant beam, 11. Elevator, 12. Stair, 13. Door opening.

Detailed ways

In order to better understand the utility model, the utility model will be further described in detail below in conjunction with the accompanying drawings and implementation examples, but the implementation of the utility model is not limited thereto.

As shown in accompanying drawings 1 to 7, a high-rise building includes a giant column 9 and a giant beam 10. In this example, the giant column 9 adopts a hollow interlayer steel pipe concrete giant column, including an inner rectangular steel pipe column 1 assembled and welded by straight steel plates and an outer rectangular steel column. Rectangular steel pipe columns 2, elevators 11, stairs 12 and door openings 13, the hollow interlayer between the inner rectangular steel pipe column 1 and the outer rectangular steel pipe column 2 is built with two-way opposite tension stirrups 3, and poured with high-strength concrete 4.

The inner rectangular steel pipe column 1 and the outer rectangular steel pipe column 2 are made of Q345 steel plates, and then two rectangular steel pipes of different sizes are placed concentrically, and high-strength concrete is poured between the inner and outer rectangular steel pipe columns.

The two-way paired stirrups used to make the two-way paired stirrups 3 are HPB235, and the two-way paired stirrup cages include a plurality of positioning longitudinal bars 8 arranged along the height direction and playing a positioning role and horizontally arranged on the positioning longitudinal bars. Two-way pair of pull stirrups 3, the two-way pair of pull stirrups 3 are arranged with multiple layers at a certain distance along the extending direction of the positioning longitudinal bars 8 on the positioning longitudinal bars 8, and the two ends of the two-way pair of pull stirrups 3 are respectively fixed On the opposite surface of the inner and outer steel pipe columns and the opposite surface of the outer steel pipe column, the middle part of the two-way double-stretched stirrup 3 is fixed on the positioning longitudinal bar 8, and the connection between the two-way double-stretch stirrup cage and the hook steel plate member 6 There are transverse reinforcing bars 9 arranged horizontally corresponding to the positions of the hooks, and the transverse reinforcing bars 9 are welded to the ends of the two-way double-stretching stirrups, so as to connect the two-way double-stretching stirrups arranged in the same direction on the same layer into a whole,

In order to improve the welding strength, the two ends of the two-way tension stirrup are bent and set tangent to the inner wall of the rectangular steel pipe, and then fixed to the inner wall of the inner rectangular steel pipe column 1 and the outer rectangular steel pipe column 2 by welding, and the welding area can be increased at the bend And to improve the welding strength, spot welding is used at the vertical intersection of the two-way double-stretched stirrups, and the two-way double-stretched stirrups are arranged at equal intervals along the length and height of the rectangular steel pipe. Restrains and increases the stability of steel pipes.

The strength of the high-strength concrete is not lower than C60.

The construction method of the hollow interlayer concrete filled steel tube giant column comprises the following steps:

1) Determine the size of the inner rectangular steel pipe column, the outer rectangular steel pipe column, and the two-way hoop cage according to the actual construction situation, assemble the inner rectangular steel pipe column and the two-way hoop cage, and prepare the ordinary steel plate for assembling the outer rectangular steel pipe column Components and hook steel plate components, the hook steel plate components include steel plate components and multiple sets of hooks fixed on the inside of the steel plate components, the distance between each set of hooks is the same as the axial direction of the two-way two-way opposite tension stirrups on the two-way opposite tension stirrup cage The spacing is matched, and the hook steel plate member is also provided with a plurality of plug welding grooves at the position corresponding to the transverse steel bar at the hook;

2) Transport the two-way hoop cage, inner rectangular steel pipe column, ordinary steel plate member and hook steel plate member to the site; draw a positioning reference line on the construction ground;

3) After fixing the inner rectangular steel pipe column on the bottom plate or foundation, put the two-way double-tensioned stirrup cage on the outside of the inner rectangular steel pipe column from top to bottom, and then weld the inner side of the two-way double-tensioned stirrup cage to the outer wall of the inner rectangular steel pipe column fixed;

4) After the ordinary steel plate member is connected with the bottom plate or foundation, use the welding construction activity area formed by the hook steel plate member on the corresponding installation position on the two-way double-stretch stirrup cage, and weld the ordinary steel plate member on the outside of the two-way double-stretch stirrup cage , and then the hook steel plate member is mounted on the two-way double-stretch stirrup cage through multiple sets of hooks, and then plug-welded on the two-way double-stretch stirrup cage through a plug welding groove, and the bottom of the hook steel plate member and the bottom plate Or the foundation is fixed, and finally the adjacent ordinary steel plate members and the hook steel plate members are welded and assembled, so that there is a hollow interlayer concrete filled steel pipe giant column with a built-in two-way hoop cage between the inner rectangular steel pipe column and the outer rectangular steel pipe column. ;

5) Then pour high-strength concrete 4 between the inner rectangular steel pipe column 1 and the outer rectangular steel pipe column 2;

6) After the high-strength concrete is poured, an elevator 11 and a staircase 12 are installed in the interior space of the giant column, and the staircase is a prefabricated assembly staircase or an integral cast-in-place reinforced concrete staircase.

In addition, it should be noted that this patent is not limited to the above-mentioned embodiments, as long as the specific size or shape of the parts is not specified, the parts can be of any size or shape that is suitable for its structure, regardless of its material composition. Any change, any use of the structural design provided by the utility model is a deformation of the utility model, and should be considered within the protection scope of the utility model.

Claims (10)

1. a kind of concrete-filled double skin steel tube colossal column, it is characterised in that: including interior rectangle steel pipe column (1), be coaxially mounted to It outer rectangle steel tubing string (2) on the outside of interior rectangle steel pipe column (1) and is cast between inside and outside rectangle steel tubing string (2) in interlayer High-strength concrete is equipped with double-way opposed-pulling stirrup cage in the interlayer between the inside and outside rectangle steel tubing string (2), described two-way right It draws and is fixed respectively with interior rectangle steel pipe column (1) and outer rectangle steel tubing string (2) inside and outside stirrup cage, pass through the double-way opposed-pulling hoop The opposite face in both inside and outside rectangle steel tubing strings (2) opposite face and outer rectangle steel tubing string (2) is fixedly connected by muscle cage, described Pipeline is embedded in interlayer between inside and outside rectangle steel tubing string (2), the interior hollow part of the interior rectangle steel pipe column (1) is provided with Elevator and/or stair.

2. concrete-filled double skin steel tube colossal column according to claim 1, it is characterised in that: the double-way opposed-pulling stirrup Cage include more laid along short transverse, muscle (8) are indulged in the positioning that plays the role of positioning and are fixed on positioning indulges and laterally lay on muscle (8) Double-way opposed-pulling stirrup (3), the double-way opposed-pulling stirrup (3) is on positioning vertical muscle (8) along vertical muscle (8) extending direction of positioning, with one Fixed spacing is laid with multilayer, and the both ends of the double-way opposed-pulling stirrup (3) are separately fixed inside and outside rectangle steel tubing string (2) opposite face And outer rectangle steel tubing string (2) opposite face, it is fixed in the middle part of the double-way opposed-pulling stirrup (3) on positioning vertical muscle (8).

3. concrete-filled double skin steel tube colossal column according to claim 2, it is characterised in that: the double-way opposed-pulling stirrup (3) diameter is greater than the diameter for positioning vertical muscle (8).

4. concrete-filled double skin steel tube colossal column according to claim 2, it is characterised in that: in double described in same layer To identical to drawing stirrup (3) to arrange that spacing with the double-way opposed-pulling stirrup (3) of adjacent layer is longitudinally arranged spacing in the horizontal direction.

5. concrete-filled double skin steel tube colossal column according to claim 1, it is characterised in that: the stair are prefabricated dress With formula stair or integral cast-in-situ formula reinforced concrete stairs.

6. concrete-filled double skin steel tube colossal column according to one of claims 1 to 5, it is characterised in that: the outer square Shape steel pipe column (2) is assembled by general steel plate component (5) and crotch steel plate member (6), and the crotch steel plate member (6) includes Steel plate member and the crotch being fixed on the inside of steel plate member, the general steel plate component (5) are welded on the double-way opposed-pulling stirrup On cage, the double-way opposed-pulling stirrup cage is equipped with crotch position the corresponding cross laterally laid with crotch steel plate member (6) junction To reinforcing bar, the transverse steel is welded on the end of the double-way opposed-pulling stirrup (3) of composition double-way opposed-pulling stirrup cage, will be in same Double-way opposed-pulling stirrup (3) connection that the same direction of layer is laid is integral, and the crotch steel plate member (6) is mounted by crotch It is fixed on the transverse steel of the double-way opposed-pulling stirrup cage, adjacent general steel plate component (5), adjacent crotch steel plate member (6) And it is welded between adjacent general steel plate component (5) and crotch steel plate member (6).

7. concrete-filled double skin steel tube colossal column according to claim 6, it is characterised in that: the crotch steel plate member (6) preset installation site is welding procedure zone of action, the welding procedure zone of action side in double-way opposed-pulling stirrup cage Just welding activity is carried out to general steel plate component (5) and double-way opposed-pulling stirrup cage, after the completion of general steel plate component (5) are welded, The crotch steel plate member (6) is mounted by crotch to be fixed in the double-way opposed-pulling stirrup cage, and the crotch steel plate structure Part (6) with it is tangent on the outside of double-way opposed-pulling stirrup cage.

8. concrete-filled double skin steel tube colossal column according to claim 6, it is characterised in that: the crotch steel plate member (6) position corresponding with transverse steel is equipped with plug welding slot at crotch, and the crotch steel plate member (6) is mounted on double-way opposed-pulling hoop After on the horizontal line reinforcing bar of muscle cage, then plug welding is in double-way opposed-pulling stirrup cage.

9. concrete-filled double skin steel tube colossal column according to claim 6, it is characterised in that: the double-way opposed-pulling stirrup (3) both ends are bent, and the tangent company of inner wall of the bending part of the double-way opposed-pulling stirrup (3) and inside and outside rectangle steel tubing string (2) It connects, junction and inside and outside rectangle steel tubing string (2) are welded.

10. concrete-filled double skin steel tube colossal column according to claim 6, it is characterised in that: the crotch steel plate structure Multiple groups crotch, each layer of double-way opposed-pulling hoop on the position of crotch described in each group and double-way opposed-pulling stirrup cage are equipped on the inside of part (6) Muscle (3) is corresponding, and every group of crotch includes multiple crotches that transversely reinforcing bar is laid.