Novel steel-concrete combined beam column structure

Abstract

The utility model relates to the technical field of building structures, in particular to a novel steel-concrete combined beam column structure which comprises a concrete column and a steel-concrete combined beam integrally poured with the concrete column, and the steel-concrete combined beam comprises a concrete beam and a steel box beam integrally wrapping the concrete beam and the concrete column. The steel plate for installing and welding the steel box girder is attached to the concrete column from the periphery and attached to the concrete beam from the two sides and the bottom face, and through holes are densely distributed in the steel plate for installing and welding the steel box girder. Compared with the prior art, the combined beam has the following beneficial effects that 1, the steel plate holes wrapping the beam column increase the bonding force and the meshing force between the steel plate and concrete, so that the working performance of the combined beam is better, the tensile strength of steel is fully exerted, the ductility of the combined beam is increased, and cracks of the concrete at the bottom of the beam are effectively controlled; (2) the integrity and the stress performance of the beam-column joint are improved through the connection of the steel plate outside the beam and the steel plate outside the column; and 3, compared with other forms of composite beams, shear connectors are not needed, the construction process is simple, and steel is saved at the same time.

Description

Technical Field

[0001] The utility model relates to the technical field of building structures, in particular to a novel steel-concrete composite beam-column structure. Background Art

[0002] Compared with reinforced concrete beams, steel-concrete composite beams can reduce the deadweight of the structure, reduce earthquake effects, reduce cross-sectional dimensions, increase effective use space, save formwork processes and templates, shorten construction periods, and increase beam ductility. Compared with steel beams, they can reduce the amount of steel used, increase stiffness, increase stability and integrity, and enhance structural fire resistance and durability. In recent years, steel-concrete composite beams have been increasingly widely used in urban overpasses and building structures in my country, and are developing towards large spans. The application practice of steel-concrete composite beams in my country shows that it has the advantages of both steel structures and concrete structures, has significant technical, economic and social benefits, is suitable for the national conditions of my country's basic construction, and is one of the main development directions of future structural systems.

[0003] At present, the main types of steel-concrete composite beam structures are steel-framed beams with internal steel beams and external concrete, and composite beams with internal concrete and external steel plates. Both types of composite beams require shear connectors to increase the bonding force between steel and concrete to form an overall common force. The use of shear connectors increases the material and construction process, and the welding quality is not easy to guarantee, which are issues that cannot be ignored. Utility Model Content

[0004] The purpose of the utility model is to address the deficiencies of the prior art and to provide a novel steel-concrete composite beam-column structure, which, while having many advantages of a steel-concrete composite beam, can eliminate the setting of a shear connector, and also has the advantages of high tensile strength of steel, effective control of concrete cracks, increased overall working performance of the composite beam, and good integrity of the beam-column node.

[0005] The technical solution adopted by the utility model to solve its technical problems is: a novel steel-concrete composite beam-column structure, comprising a concrete column and a steel-concrete composite beam, the steel-concrete composite beam comprising a concrete beam and a steel box beam integrally wrapping the concrete beam and part of the concrete column, the concrete column, the concrete beam and the steel box beam being integrally cast in a beam-column formwork; the steel box beam wraps the concrete column from all sides, the steel box beam wraps the concrete beam from both sides and the bottom, and the steel plate welded to the steel box beam is densely covered with through holes; a floor slab integrally cast with the beam and column is arranged on the steel-concrete composite beam, and the steel bars constituting the floor slab are welded to the steel box beam.

[0006] Preferably, the concrete column is a conventional column without considering the effect of the steel box girder.

[0007] Preferably, the steel-concrete composite beam is a composite beam determined by theoretical analysis or finite element analysis taking into account the effect of the steel box beam.

[0008] Preferably, the width of the concrete beam is smaller than the width of the concrete column, the height of the steel box beam wrapped around the concrete column is consistent with the height of the steel box beam wrapped around the concrete beam, and the steel box beam is dumbbell-shaped as a whole.

[0009] Preferably, the steel box girder is formed by welding steel plates on each side surface at the intersection of the surfaces, and the thickness of the steel plates on each side surface is the same.

[0010] Preferably, any relative or intersecting steel plate splicing welds of the steel box girder are staggered and are not located in the same plane.

[0011] Preferably, the steel box girder is provided with at least two rows of through holes along the height direction, and the through holes are vertically aligned or staggered.

[0012] Preferably, the through hole is circular or elliptical.

[0013] Preferably, the bottom of the floor slab is provided with transverse floor slab bottom lower steel bars and longitudinal floor slab bottom upper steel bars, the top of the floor slab is provided with longitudinal floor slab top lower steel bars and transverse floor slab top upper steel bars, and the floor slab bottom lower steel bars are welded to the top of the steel box girder side plate.

[0014] Preferably, the concrete beam is provided with upper longitudinal reinforcement, lower longitudinal reinforcement and beam stirrups, the upper ends of the beam stirrups protrude from the concrete beam, and the upper ends of the beam stirrups and the upper longitudinal reinforcement are arranged in the floor slab and consolidated therewith.

[0015] The beneficial effects of the utility model are: a new type of steel-concrete composite beam-column structure, including a concrete column and a steel-concrete composite beam cast integrally with the concrete column, the steel-concrete composite beam including a concrete beam and a steel box beam that integrally wraps the concrete beam and the concrete column, the steel plate welded to the steel box beam fits the concrete column from all sides, and fits the concrete beam from both sides and the bottom, and the steel plate welded to the steel box beam is densely covered with through holes. It has the following beneficial effects: 1. The openings of the steel plate wrapping the beam column increase the bonding force and bite force between the steel plate and the concrete, making the composite beam work better, while giving full play to the tensile strength of the steel, increasing the ductility of the composite beam, and effectively controlling the cracks in the concrete at the bottom of the beam; 2. The connection between the steel plate outside the beam and the steel plate outside the column increases the integrity and force performance of the beam-column node; 3. Compared with other forms of composite beams, there is no need to set up shear connectors, the construction process is simple, and steel is saved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a front view of a new type of steel-concrete composite beam-column structure of the utility model;

[0017] Figure 2 yes Figure 1 A top view of

[0018] Figure 3 yes Figure 1 AA section view;

[0019] Figure 4 is a three-dimensional diagram of the steel box girder;

[0020] Figure 5 It is a stereoscopic diagram of a novel steel-concrete composite beam-column structure of the utility model.

[0021] Description of reference numerals:

[0022] 1——concrete column, 2——steel-concrete composite beam, 21——concrete beam, 22——steel box beam, 23——through hole, 3——floor slab, 31——bottom side reinforcement of floor slab, 32——top side reinforcement of floor slab, 33——bottom side reinforcement of floor slab, 34——top side reinforcement of floor slab, 4——upper side longitudinal reinforcement of beam, 5——lower side longitudinal reinforcement of beam, 6——beam stirrups. DETAILED DESCRIPTION

[0023] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments, but the scope of implementation of the present invention is not limited thereto.

[0024] like Figures 1 to 3 As shown, a new type of steel-concrete composite beam-column structure of the present embodiment includes a concrete column 1 and a steel-concrete composite beam 2, wherein the steel-concrete composite beam 2 includes a concrete beam 21, and a steel box beam 22 integrally wrapping the concrete beam 21 and part of the concrete column 1, wherein the concrete column 1, the concrete beam 21, and the steel box beam 22 are integrally cast in the beam-column formwork; the steel box beam 22 wraps the concrete column 1 from all sides, and the steel box beam 22 wraps the concrete beam 21 from both sides and the bottom, and the steel plate welded to the steel box beam 22 is densely covered with through holes; a floor slab 3 integrally cast with the beam and column is provided on the steel-concrete composite beam 2, and the steel bars constituting the floor slab 3 are welded to the steel box beam 22.

[0025] This embodiment adopts the steel-concrete composite beam 2 to enhance the integrity and stress performance of the beam-column, eliminating the need for shear connectors. During the design, the concrete column 1 does not consider the effect of the steel box beam 22, and adopts conventional design; the steel-concrete composite beam 2 needs to consider the effect of the steel box beam 22, and the specifications and dimensions of the concrete beam 21 and the steel box beam 22, as well as the shape, size and number of the through holes 23 opened on the steel plate welded to the steel box beam 22, are determined by theoretical analysis or finite element analysis. The steel-concrete composite beam 2 of this embodiment increases the integrity and stress performance of the beam-column node, and also increases the bending and shear resistance of the beam. Therefore, the cross-sectional area of ​​the steel-concrete composite beam 2 can be reduced, thereby saving materials and reducing weight, and also increasing the net height of the building.

[0026] During construction, the steel plate is first cut and the through hole is opened on the steel plate. In this embodiment, a round hole is used. Then, each steel plate is welded together at right angles. Figure 4 The steel box girder 22 shown in the figure has the same thickness of each steel plate of the welded steel box girder 22. The welded steel box girder 22 has four rows of circular holes in the height direction, one on each side. The circular holes can be aligned up and down or staggered. For the longer steel-concrete composite beam 2, if the steel plates of the welded steel box girder 22 need to be spliced ​​because they are too long or too wide, any relative or intersecting splicing welds of the welded steel box girder 22 are staggered and not located on the same facade. The steel box girder 22 is completed in the factory as much as possible. The welded steel box girder 22 is placed in the beam-column formwork, and then the beam, slab and column reinforcements are set on the steel box girder 22 to complete the steel cage arrangement, and finally the concrete is poured. Figure 5 shown.

[0027] In this embodiment, the floor slab 3 is also cast together with the beams and columns, thereby increasing the rigidity of the beams and further increasing their flexural resistance. In order to further integrate the structure and make the steel-concrete composite beam-column structure of this embodiment bear force as a whole, the bottom of the floor slab 3 is provided with a transverse floor slab bottom lower side steel bar 31 and a longitudinal floor slab bottom upper side steel bar 32, and the top of the floor slab 3 is provided with a longitudinal floor slab top lower side steel bar 33 and a transverse floor slab top upper side steel bar 34, and the floor slab bottom lower side steel bar 31 is welded to the top of the side plate of the steel box beam 22; the concrete beam 21 is provided with a beam upper side longitudinal bar 4, a beam lower side longitudinal bar 5 and a beam stirrup 6, the upper end of the beam stirrup 6 protrudes from the concrete beam 21, and the upper end of the beam stirrup 6 and the beam upper side longitudinal bar 4 are provided in the floor slab 3 and consolidated therewith.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, and for the convenience of describing the technical solution, the front, rear, left, right, top, middle, and bottom directions adopted are based on the settings in the accompanying drawings, rather than limiting the protection scope of the utility model. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the utility model.

Claims

1. A new type of steel-concrete composite beam-column structure, characterized in that: It includes a concrete column and a steel-concrete composite beam, the steel-concrete composite beam includes a concrete beam and a steel box beam that integrally wraps the concrete beam and part of the concrete column, the concrete column, the concrete beam and the steel box beam are integrally cast in a beam-column formwork; the steel box beam wraps the concrete column from all sides, the steel box beam wraps the concrete beam from both sides and the bottom, and the steel plate welded to the steel box beam is densely covered with through holes; the steel-concrete composite beam is provided with a floor slab integrally cast with the beam and column, and the steel bars constituting the floor slab are welded to the steel box beam.

2. A new type of steel-concrete composite beam-column structure according to claim 1, characterized in that: The concrete column is a conventional column without considering the effect of the steel box beam.

3. The novel steel-concrete composite beam-column structure according to claim 1 is characterized in that: The steel-concrete composite beam is a composite beam determined by theoretical analysis or finite element analysis taking into account the effect of the steel box beam.

4. The novel steel-concrete composite beam-column structure according to claim 1 is characterized in that: The width of the concrete beam is smaller than the width of the concrete column, the height of the steel box beam wrapped around the concrete column is consistent with the height of the steel box beam wrapped around the concrete beam, and the steel box beam is dumbbell-shaped as a whole.

5. The novel steel-concrete composite beam-column structure according to claim 1 is characterized in that: The steel box girder is formed by welding steel plates on each side surface at the intersection of the surfaces, and the thickness of the steel plates on each side surface is the same.

6. The novel steel-concrete composite beam-column structure according to claim 1 is characterized in that: Any relative or intersecting steel plate splicing welds of the steel box girder are staggered and are not located in the same plane.

7. The novel steel-concrete composite beam-column structure according to claim 1 is characterized in that: The steel box girder is provided with at least two rows of through holes along the height direction, and the through holes are vertically aligned or staggered.

8. The novel steel-concrete composite beam-column structure according to claim 1 is characterized in that: The through hole is circular or elliptical.

9. The novel steel-concrete composite beam-column structure according to claim 1 is characterized in that: The bottom of the floor slab is provided with transverse floor slab bottom lower side steel bars and longitudinal floor slab bottom upper side steel bars, the top of the floor slab is provided with longitudinal floor slab top lower side steel bars and transverse floor slab top upper side steel bars, and the floor slab bottom lower side steel bars are welded to the top of the steel box girder side plate.

10. The novel steel-concrete composite beam-column structure according to claim 1 is characterized in that: The concrete beam is provided with upper longitudinal reinforcement, lower longitudinal reinforcement and beam stirrups, the upper ends of the beam stirrups protrude from the concrete beam, the upper ends of the beam stirrups and the upper longitudinal reinforcement are arranged in the floor slab and consolidated therewith.

Images