CN204781356U - Steel core concrete column and outsourcing U -shaped steel -concrete composite beam connected node - Google Patents

Abstract

The utility model provides a connection node between a steel pipe concrete column and an outsourcing U-shaped steel concrete composite beam. In order to save materials, it solves the problem that the indoor corner has convex angles due to the overhang of the connection plate at the joint of the composite beam bottom plate and the steel pipe, which affects the appearance. To solve the problem, an inner partition is installed in the steel pipe corresponding to the position of the U-shaped steel bottom plate, and the periphery of the inner partition is welded to the inner wall of the steel pipe. The opposite ends of the steel pipe along the length direction of the composite beam are respectively provided with through holes and sleeves, and the sleeves are welded to the outer wall of the steel pipe, and the welding work is completed in the factory. The center line of the through hole and the sleeve are in the same horizontal plane, and the sleeve is symmetrically arranged on both sides of the through hole. This structure can avoid excessive weakening of the steel pipe’s bearing capacity due to the large number of holes on the side wall of the steel pipe, and at the same time It also reduces the welding workload, facilitates construction and realizes assembly. The U-shaped steel side plate and the steel pipe wall are connected by high-strength bolts through the connecting plate, and the connecting plate is connected with the steel pipe wall through fillet welds, and the welding is completed in the factory.

Description

A connection node between a steel tube concrete column and an outsourcing U-shaped steel concrete composite beam

technical field

The utility model relates to a steel pipe concrete column and an outsourcing U-shaped steel-concrete composite beam, in particular to a connection node between a steel pipe concrete column and an outsourcing U-shaped steel-concrete composite beam.

Background technique

Concrete-filled steel pipe column refers to the vertical member formed by filling concrete in the steel pipe. It has the advantages of high bearing capacity, good plasticity and ductility, high rigidity, convenient construction, and good fire resistance. It has received extensive attention from the engineering community in recent years. It is used more and more in multi-high-rise buildings and bridge engineering. According to different cross-sectional forms, CFST columns can be divided into circular CFST columns, rectangular CFST columns and polygonal CFST columns. Outer U-shaped steel-concrete composite beam is to directly weld or cold-bend the steel plate into U-shaped steel with outer flange, and then pour concrete inside the U-shaped steel and the upper part of the upper flange, and connect the U-shaped steel through shear connectors. It is connected with T-section concrete to bear the load together, and has the advantages of high strength, good stability, good ductility, good fire resistance, and convenient construction. Therefore, the structural system formed by CFST columns and U-shaped steel-concrete composite beams has the following significant advantages:

(1) It can give full play to the characteristics of steel and concrete, and the material consumption is low: the outsourcing U-shaped steel concrete composite beam and the steel pipe concrete column have high bearing capacity and high rigidity, which greatly reduces the cross section of the component, not only effectively increases the The space usage area is large, and the amount of steel and concrete is reduced, which effectively reduces the consumption of resources;

(2) High degree of industrialized production: Outsourced U-shaped steel and steel pipes can be produced in the factory, which has a high degree of mechanization and commercialization, reliable and stable quality, and is conducive to the integration and industrialization of construction technology;

(3) Enhanced fire-resistant performance: U-shaped steel and concrete filled in steel pipes are better refractory materials, which can absorb heat, prolong the heating time of components, and enhance the fire-resistant performance of the structure;

(4) Low construction energy consumption and fast construction speed: Outsourcing U-shaped steel and steel pipes are not only force-bearing components, but also can be used as formwork for pouring concrete. In addition, the protruding upper flange of U-shaped steel can also be used as a support for floor formwork , so as to reduce the amount of formwork, scaffolding and formwork support procedures, reduce the amount of wet work, noise and dust on site, and meet the construction requirements of green ecological civilization and environmental protection;

(5) The recycling rate of materials is relatively high: some structural materials of this type are steel materials, which are recycled materials. When the life cycle of the building ends, its structural steel materials can be recycled;

(6) New materials such as lightweight wall panels and composite floor slabs matching the structural system can be used, which have good sound insulation and thermal insulation performance and meet the requirements of building energy conservation.

It can be seen that the structural system formed by the steel tube concrete column and the outsourcing U-shaped steel concrete composite beam has good social and economic benefits. Especially with the rapid development of national economic construction and the promotion of housing industrialization, the application prospect of this green structural system will be very broad.

In the structural system, the node is undoubtedly the most important to the structure. It is the force transmission hub between the structural components and is directly related to the working performance and safety of the structure. A reasonable node form is the premise of developing a new structural system. However, at present, there are no application examples and relevant research materials of the structural system formed by outsourcing U-shaped steel-concrete composite beams and steel-filled steel tube columns, mainly because the available joint forms are very scarce. Therefore, with the continuous deepening of component research, research on the reasonable structural form of the connection joint between the U-shaped steel concrete composite beam and the steel tube concrete column is the key technology to develop and promote the application of this green structural system in engineering, and it is of great importance Theoretical significance and practical value.

At present, there are three types of connection joints between CFST columns and U-shaped steel-concrete composite beams: (1) The lower reinforced ring plate is set outside the steel pipe at the position of the bottom plate of the composite beam, and is welded with the bottom plate of the composite beam, and the side of the composite beam The plate is directly welded to the steel pipe wall, and the negative moment reinforcement is continuously penetrated through the joint area by punching holes in the steel pipe wall; The bottom plate and the lower reinforced ring plate are lap-welded, the negative moment reinforcement is disconnected at the joint area, and welded to the upper reinforced ring plate, and the side plate of the composite beam is directly welded to the steel pipe wall; (3) For wide flat beams, welded at the joint Similar to the "shoulder pole" negative moment steel plate, an outer ring plate is set outside the steel pipe at the bottom plate of the composite beam. The bottom plate of the composite beam is welded to the outer ring plate, and the upper flange and side plate are directly connected to the steel pipe wall by fillet welds.

There are few available forms of connecting joints between steel pipe concrete columns and outsourcing U-shaped steel concrete composite beams. Although the connection between the CFST column and the U-shaped steel-concrete composite beam can refer to the structural treatment of the above three connection nodes, these three connection types have the following disadvantages.

1. Structural form (1): Negative bending moment steel bar through type

(1) Since the bottom plate of the composite beam and the lower reinforced ring plate are lap welded, under the action of earthquake load, the weld seam is easy to crack and cannot meet the seismic requirements;

(2) Since the steel bars with negative bending moment all pass through the joint area, there are many holes on the steel pipe wall, so the bearing capacity of the steel pipe is greatly weakened, and corresponding reinforcement measures need to be taken, such as repair welding steel plates, stiffeners, steel bars, etc. It not only increases the amount of steel used, but also increases the difficulty of construction;

(3) Since the side plate of the composite beam and the steel pipe wall are connected by welds, the on-site welding workload is large, which is not only laborious and time-consuming, but also the quality of the welds is difficult to guarantee, which is not conducive to large-scale projects.

2. Structural form (2): Welding type of negative moment steel bar and reinforced ring plate

(1) Since the bottom plate of the composite beam and the lower reinforced ring plate are lap welded, under the action of earthquake load, the weld seam is easy to crack and cannot meet the seismic requirements;

(2) Since the negative bending moment reinforcement is welded on the upper reinforcing ring plate to realize the transfer of bending moment by the reinforcement, the quality of this welding is required to be very high. However, the welding of steel bars is usually on-site welding, not only the welding quality is difficult to guarantee, but also the welding operation is difficult due to the gravity of the steel bars. In addition, the side plate of the composite beam and the steel pipe wall are also connected by welds, which further increases the welding workload on site. This joint structure requiring a large number of welding operations is laborious and time-consuming, resulting in a long construction period, which is not conducive to the use of large-scale projects.

3. Structural form (3): Negative bending moment steel plate type

(1) Since the negative moment steel bar in the joint is replaced by a negative moment steel plate similar to a "shoulder pole", and the negative moment steel plate needs to be welded on the extended upper flange of the U-shaped steel and the side wall of the steel column, therefore, the Type joints are only suitable for wide flat beams, and cannot be applied to U-shaped steel-concrete composite beams of ordinary sizes, and the scope of application is very limited. In addition, negative bending moment steel plates need to be welded on composite beams and steel pipes, which further increases the welding workload on site;

(2) Since the side plate of the composite beam and the steel pipe wall are connected by welds, the on-site welding workload is large, which is not only laborious and time-consuming, but also the quality of the welds is difficult to guarantee, which is not conducive to large-scale projects.

Utility model content

The technical problem to be solved by the utility model is to provide a connection node between a steel tube concrete column and an outsourcing U-shaped steel concrete composite beam in view of the deficiencies in the prior art. The connecting plate protrudes out, resulting in protruding angles at the indoor corners and affecting the aesthetics, saving materials, avoiding the excessive weakening of the bearing capacity due to the large number of openings in the side wall of the steel pipe, and reducing the workload of on-site welding.

This scheme is realized through the following technical measures: the connection node between the steel pipe concrete column and the outer U-shaped steel concrete composite beam includes an inner partition, and the inner partition is provided with pouring holes and ventilation holes, and the inner partition is located at The position corresponding to the position of the U-shaped steel bottom plate inside the steel pipe, and the periphery of the inner partition is welded to the inner wall of the steel pipe; the opposite ends of the steel pipe along the length direction of the composite beam are respectively provided with through holes and sleeves, and the sleeves are connected to the The outer wall of the steel pipe is welded, the center line of the through hole and the sleeve are in the same plane, and the sleeve is symmetrically arranged on both sides of the through hole.

The above-mentioned sleeve is threadedly connected with the end of the negative bending moment steel bar, and the negative bending moment steel bar penetrating through the inner cavity of the steel pipe passes through the through hole.

The centerlines of the above-mentioned through holes and the sleeve coincide with the centerlines of the negative bending moment reinforcement.

The two side plates of the above-mentioned U-shaped steel are connected with a connecting plate through high-strength bolts, and the connecting plate is connected with the outer wall of the steel pipe in the steel pipe concrete column by welding.

The welding method between the connecting plate and the outer wall of the steel pipe in the steel pipe concrete column is fillet welding.

Among the four sides of the inner partition, three adjacent sides are connected to the inner wall of the steel pipe by butt welds with notches, and the remaining one side is connected to the inner wall of the steel pipe by electroslag welding with a melting nozzle.

The above-mentioned U-shaped steel bottom plate is connected with the outer wall of the steel pipe by a butt weld.

The welding method adopted for the above-mentioned sleeve and the outer wall of the steel pipe is a combination of partial penetration and fillet welding.

The cross section of the steel pipe is rectangular, circular or polygonal.

The beneficial effect of this scheme can be known according to the description of the above scheme. In the connection node between the steel pipe concrete column and the outer U-shaped steel concrete composite beam, in order to save materials, the connection plate at the connection between the bottom plate of the composite beam and the steel pipe is overhanging. As a result, there are protruding angles at the indoor corners that affect the aesthetics. An inner partition is installed in the steel pipe corresponding to the position of the U-shaped steel bottom plate, and the periphery of the inner partition is welded to the inner wall of the steel pipe. In addition, the opposite ends of the steel pipe along the length direction of the composite beam are respectively provided with through holes and sleeves, and the sleeve is welded to the outer wall of the steel pipe. The welding work is completed in the factory, thereby reducing the welding workload on site. The central line of the through hole and the sleeve are in the same horizontal plane, and the sleeve is symmetrically arranged on both sides of the through hole. This structure can reduce the weakening of the steel pipe’s bearing capacity due to the large number of holes on the side wall of the steel pipe, and at the same time It also reduces the welding workload, facilitates construction and realizes assembly. In order to further reduce the on-site welding workload, the U-shaped steel side plate and the steel pipe wall are connected by high-strength bolts through the connecting plate, and the connecting plate is connected with the steel pipe wall through fillet welds, and the welding is completed in the factory. It can be seen that, compared with the prior art, the utility model has substantive features and progress, and the beneficial effects of its implementation are also obvious.

Description of drawings

Fig. 1 is a front structural schematic diagram of a specific embodiment of the present invention.

Fig. 2 is a sectional view of A-A in Fig. 1 .

Fig. 3 is a B-B sectional view in Fig. 1 .

FIG. 4 is a schematic structural diagram of the left view of FIG. 1 .

FIG. 5 is a schematic top view of the structure in FIG. 1 .

Fig. 6 is a three-dimensional partial cross-sectional structural schematic diagram of a specific embodiment of the present invention.

Fig. 7 is a schematic diagram of the structure of the inner partition.

Figure 8 is a schematic diagram of the front view of the node after pouring concrete.

Fig. 9 is a left view structural schematic diagram of a node after pouring concrete.

In the figure: 1-steel pipe, 2-U-shaped steel, 3-inner partition, 4-negative moment reinforcement, 5-negative moment reinforcement, 6-sleeve, 7-connecting plate, 8-high-strength bolt, 9- Shear connectors, 10-welds, 11-through holes, 12-pouring holes, 13-venting holes, 14-concrete steel tube columns, 15-composite beams.

Detailed ways

In order to clearly illustrate the technical characteristics of this solution, the following will describe this solution through specific implementation modes and in conjunction with the accompanying drawings.

Composite beam: refers to the abbreviation of U-shaped steel concrete composite beam.

High-strength bolts: refer to high-strength bolts, which are a standard part. In general, high-strength bolts can withstand a larger load than ordinary bolts of the same specification.

A connection node between a steel pipe concrete column and an outsourcing U-shaped steel concrete composite beam, as shown in the figure, it includes an inner partition 3, and the inner partition 3 is provided with pouring holes 12 and ventilation holes 13 to ensure that the concrete inside the steel pipe 1 The pouring went smoothly. The inner partition 3 is located in the steel pipe 1 corresponding to the position of the bottom plate of the U-shaped steel 2, and the periphery of the inner partition 3 is welded to the inner wall of the steel pipe 1. Preferably, among the four sides of the inner partition 3, the adjacent three sides It is connected with the inner wall of the steel pipe 1 by a butt weld with a notch, and the remaining side is connected with the inner wall of the steel pipe 1 by electroslag welding with a melting nozzle, so as to realize the welding and fixing of the inner partition 3 in the steel pipe 1 smoothly. After the inner partition 3 is adopted, the inner partition 3 is completely located in the steel pipe 1, which solves the problem that the appearance of the indoor corner is affected by convex corners caused by the overhang of the connecting plate at the joint between the bottom plate of the U-shaped steel 2 and the steel pipe 1, and at the same time Material can also be saved.

The opposite ends of the steel pipe 1 along the length direction of the composite beam 15 are respectively provided with through holes 11 and sleeves 6, and the sleeve 6 is welded to the outer wall of the steel pipe 1, preferably the sleeve 6 is welded to the outer wall of the steel pipe 1. The method is combined partial penetration and fillet welding, and the welding work is completed in the factory. The centerline of the through hole 11 and the centerline of the sleeve 6 are located in the same horizontal plane (that is, co-horizontal), and the sleeve 6 is symmetrically arranged on both sides of the through hole 11 and close to the corresponding steel pipe wall, so as to prevent the steel pipe 1 from tearing. crack. The centerlines of the through hole 11 and the sleeve 6 coincide with the centerlines of the negative moment reinforcement 4 and the negative moment reinforcement 5 . The sleeve 6 is threadedly connected with the end of the negative moment steel bar 5, and the end of the negative moment steel bar 5 is threaded and then directly screwed into the sleeve 6, that is, the negative moment steel bar 5 connected with the sleeve 6 is at the node The said through hole 11 passes through the negative bending moment steel bar 4 that runs through the inner cavity of the steel pipe 1, that is, the negative bending moment steel bar 4 on the inner side passes through the through hole 11 on the steel pipe 1 and continuously penetrates the node area. This structure The form can reduce the weakening of the bearing capacity of the steel pipe 1 due to the large number of openings on the side wall of the steel pipe 1, and at the same time can reduce the welding workload, facilitate construction and realize assembly.

In order to reduce the on-site welding workload, the two side plates of the U-shaped steel 2 are connected with a connecting plate 7 through high-strength bolts 8, and the connecting plate 7 is connected with the outer wall of the steel pipe 1 in the steel tube concrete column 14 by welding, preferably the connecting plate 7 and The welding method of the outer wall of the steel pipe 1 in the steel tube concrete column 14 is fillet welding, and the welding is completed in the factory, and the bottom plate of the U-shaped steel 2 and the outer wall of the steel pipe 1 are connected by a butt weld.

The cross-section of the steel pipe 1 is rectangular, circular or polygonal, and the application range of this node is relatively wide, and the steel pipe 1 is not disconnected, which reduces the welding workload.

The technical features not described in the utility model can be realized by the prior art, and will not be repeated here. The utility model is not limited to the above-mentioned specific embodiments, and changes, modifications, additions or replacements made by those skilled in the art within the essential scope of the utility model should also belong to the protection scope of the utility model.

Claims (9)

1. A connection node between a steel tube concrete column and an outsourcing U-shaped steel-concrete composite beam, characterized in that: it comprises an inner partition, and said inner partition is provided with pouring holes and vent holes, and said inner partition is located in the steel pipe Corresponding to the position of the U-shaped steel bottom plate, and the periphery of the inner partition is welded to the inner wall of the steel pipe; the opposite ends of the steel pipe along the length direction of the composite beam are respectively provided with through holes and sleeves, and the sleeve is connected to the steel pipe. The outer wall is welded, the center line of the through hole and the sleeve are in the same plane, and the sleeve is symmetrically arranged on both sides of the through hole. 2. The connection node between the steel pipe concrete column and the outer U-shaped steel concrete composite beam according to claim 1, characterized in that: the sleeve is screwed to the end of the negative moment steel bar, and the through hole passes through a Negative bending moment reinforcement running through the inner cavity of the steel pipe. 3. The connection node between the concrete-filled steel pipe column and the outer U-shaped steel-concrete composite beam according to claim 2, characterized in that: the center line of the through hole and the sleeve coincides with the center line of the negative moment steel bar. 4. The connection node between the steel pipe concrete column and the outsourcing U-shaped steel-concrete composite beam according to claim 3, characterized in that: the two side plates of the U-shaped steel are connected with connecting plates by high-strength bolts, and the connecting plates are welded The method is connected with the outer wall of the steel pipe in the steel pipe concrete column. 5. The connection node between the concrete-filled steel tube column and the outer U-shaped steel-concrete composite beam according to claim 4, characterized in that: the welding method between the connecting plate and the outer wall of the steel tube in the steel tube concrete column is fillet welding. 6. The connection node between the steel pipe concrete column and the outer U-shaped steel concrete composite beam according to claim 5, characterized in that: among the four sides of the inner partition, the adjacent three sides and the inner wall of the steel pipe adopt a strip section The butt weld of the mouth is connected, and the remaining one side is connected with the inner wall of the steel pipe by melting nozzle electroslag welding. 7. The connection node between the steel pipe concrete column and the outer U-shaped steel concrete composite beam according to claim 6, characterized in that: the U-shaped steel bottom plate and the outer wall of the steel pipe are connected by butt welds. 8. The connection node between the steel pipe concrete column and the outer U-shaped steel concrete composite beam according to claim 7, characterized in that: the welding method of the sleeve and the outer wall of the steel pipe is a combination of partial penetration and fillet welding. 9. The connection node between the steel pipe concrete column and the outer U-shaped steel concrete composite beam according to claim 8, characterized in that: the cross section of the steel pipe is rectangular, circular or polygonal.