Rectangular pipe steel column and concrete steel reinforced beam structure

Abstract

A rectangular pipe steel column and concrete steel rib beam structure comprises a rectangular pipe steel column and a concrete steel rib beam, and the concrete steel rib beam is of an I-shaped structure formed by welding a web between an upper flange plate and a lower flange plate. A connecting plate is fixedly arranged at the end of the concrete steel rib beam, round holes are evenly distributed in a web of the concrete steel rib beam along the beam length, stiffening ribs are vertically distributed in the rectangular pipe steel column at equal intervals, an outward-extending bracket is arranged on one side of the upper end of the rectangular pipe steel column, and the outward-extending bracket is of an I-shaped structure formed by welding the web between an upper flange plate and a lower flange plate. A flange on one side of the overhanging bracket is in full penetration welding with a groove of the rectangular pipe steel column, and a web plate of the overhanging bracket is attached to the opposite side of the connecting plate and is fixed through a plurality of high-strength bolts; by means of the unique connection structure and the material collaborative design, traditional limitation is broken through in multiple dimensions of seismic resistance, construction and mechanical property, a novel practical scheme is provided for development of a building steel-concrete composite structure, the current complex building requirements are met, and the building steel-concrete composite structure has high application and popularization value.

Description

Technical Field

[0001] This utility model relates to the field of building structures, specifically to a rectangular tube steel column and concrete steel beam structure. Background Technology

[0002] In modern construction engineering, steel-concrete composite structures are widely used due to their combination of the advantages of both steel and concrete. Rectangular steel columns, with their excellent compressive and bending resistance and regular shape, are conducive to spatial arrangement; while concrete-steel beams combine the durability and fire resistance of concrete with the high strength and load-bearing capacity provided by steel. However, existing methods of connecting rectangular steel columns and concrete-steel beams have many shortcomings: traditional connection nodes have poor seismic performance, and under horizontal forces such as earthquakes, brittle failure easily occurs at the nodes, failing to effectively dissipate energy; the connection structure is complex, requiring precise alignment and extensive welding work during on-site construction, which is not only time-consuming but also prone to affecting the overall structural reliability due to inconsistent welding quality; in addition, the synergistic effect between different materials is not ideal, making it difficult to fully utilize the mechanical properties of steel and concrete, thus limiting the advantages of composite structures in high-rise and large-span buildings. Utility Model Content

[0003] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a rectangular tube steel column and concrete steel beam structure. With its unique connection structure and material synergy design, it breaks through the traditional limitations in multiple dimensions such as seismic resistance, construction and mechanical performance, and provides a novel and practical solution for the development of steel-concrete composite structures in buildings. It meets the needs of complex buildings today and has great value for promotion and application.

[0004] To achieve the above objectives, this utility model adopts the following technical solution: a rectangular tube steel column and a concrete steel beam structure, comprising a rectangular tube steel column and a concrete steel beam. The concrete steel beam is formed by welding webs between upper and lower flanges to form an I-shaped structure. A connecting plate is fixedly installed at the end of the concrete steel beam. Circular holes are evenly distributed along the length of the beam on the web of the concrete steel beam. Stiffening ribs are distributed vertically at equal intervals inside the rectangular tube steel column. An outward-extending corbel is provided on one side of the upper end of the rectangular tube steel column. The outward-extending corbel is formed by welding webs between upper and lower flanges to form an I-shaped structure. The flange on one side of the outward-extending corbel is fully penetrated welded to the bevel of the rectangular tube steel column. The web of the outward-extending corbel is attached to the opposite side of the connecting plate and fixed by several high-strength bolts.

[0005] Furthermore, the rectangular tube steel column is made of Q345 or higher high-strength steel with a wall thickness of 8-20mm. The spacing between two adjacent stiffening ribs is 600-800mm. The thickness of the stiffening rib is 0.6-0.7 times the wall thickness of the rectangular tube steel column. The two sides of the stiffening rib are fully welded to the inner wall of the rectangular tube steel column.

[0006] Furthermore, the upper flange of the concrete-steel beam is 20-30mm thick and its width is adapted to the beam cross-section; the lower flange is 18-28mm thick; the web thickness is 0.4-0.5 times that of the upper flange; the spacing between two adjacent circular holes on the web is 400mm; and the diameter of the circular holes is 60-70mm.

[0007] Furthermore, the thickness of the upper and lower flange plates of the extended bracket is 16-30mm, and the thickness of the web plate is 0.4-0.6 times the thickness of the flange plates; the thickness of the connecting plate is 16-24mm, and the two sides of the connecting plate are bent at 90° to form 100mm high flanges, and the height of the connecting plate is greater than or equal to the height of the web plate of the extended bracket; the high-strength bolts are M20-M30 high-strength bolts.

[0008] The beneficial effects of this utility model are as follows: The structure, through holes in the web of the steel beam and the stable connection between the corbel and the steel column, tightly integrates the concrete with the steel beam frame and rectangular steel column, forming an integrated load-bearing system after pouring. Vertical stiffening ribs ensure uniform force transmission from the steel column to the foundation, allowing the concrete to fully exert its compressive strength under the constraint of the steel frame. Tests show that the combined structure's bending ultimate bearing capacity is increased by more than 20% compared to the unoptimized connection, and the synergy of different materials is significantly improved. The web of the steel beam has intermittently spaced circular holes along its length, facilitating air expulsion and grout flow during concrete pouring, thus improving concrete density. Key connection nodes employ a hybrid connection method combining extended corbels with high-strength bolts and welding. Under the impact of horizontal seismic forces, the bolts can undergo moderate slip deformation, absorbing energy and reducing vibration. The corbel itself possesses a certain degree of flexibility, coordinating with the deformation of the beam and column, overcoming the stress concentration drawbacks of traditional rigid connections, and dispersing seismic energy to various parts of the structure. Simulation tests show that compared to ordinary welded nodes, this structure reduces displacement amplitude by approximately 30% and increases energy consumption by over 40% under rare earthquake conditions. The connecting steel plate is pre-welded to the steel beam frame at the end of the steel beam, and its outer side is bent to form a retaining edge to wrap the concrete, preventing concrete leakage during pouring. The steel components are prefabricated in the factory, and the welding of the corbel to the rectangular steel column and the assembly of the steel beam are all completed in the workshop. When transported to the site, only the bolt holes need to be aligned and high-strength bolts are tightened, which greatly reduces the amount of on-site welding, reduces construction difficulty and construction period. According to conventional engineering calculations, it can save about 25% of the time compared with traditional connection construction, and the welding quality is also easier to control, making construction convenient and efficient. With its unique connection structure and material synergy design, this utility model breaks through the traditional limitations in multiple dimensions such as seismic resistance, construction and mechanical performance, providing a novel and practical solution for the development of steel-concrete composite structures in buildings, meeting the needs of current complex buildings, and has great value for promotion and application. The parts not described in detail in this utility model are existing commonly used technologies. Attached Figure Description

[0009] The present invention will be further described below with reference to the accompanying drawings:

[0010] Figure 1 This is a schematic diagram of the overall assembly structure;

[0011] In the diagram: 1. Rectangular steel column; 2. Stiffening rib; 3. Concrete steel beam; 4. Connecting plate; 5. Outward-extending corbel; 6. High-strength bolt. Detailed Implementation

[0012] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0013] A rectangular tube steel column and concrete steel beam structure includes a rectangular tube steel column 1 and a concrete steel beam 3. The concrete steel beam 3 is formed by welding webs between upper and lower flanges to form an I-shaped structure. A connecting plate 4 is fixedly installed at the end of the concrete steel beam 3. Circular holes are evenly distributed along the length of the beam on the web of the concrete steel beam 3. Stiffening ribs 2 are distributed vertically at equal intervals inside the rectangular tube steel column 1. An outward-extending bracket 5 is provided on one side of the upper end of the rectangular tube steel column 1. The outward-extending bracket 5 is formed by welding webs between upper and lower flanges to form an I-shaped structure. The flange on one side of the outward-extending bracket 5 is fully penetrated welded to the bevel of the rectangular tube steel column 1. The web of the outward-extending bracket 5 is attached to the opposite side of the connecting plate 4 and fixed by several high-strength bolts 6.

[0014] The rectangular tube steel column 1 is made of Q345 or higher high-strength steel with a wall thickness of 8-20mm. The spacing between two adjacent stiffening ribs 2 is 600-800mm. The thickness of the stiffening rib 2 is 0.6-0.7 times the wall thickness of the rectangular tube steel column 1. The two sides of the stiffening rib 2 are fully welded to the inner wall of the rectangular tube steel column 1.

[0015] The upper flange of the concrete steel beam 3 is 20-30mm thick and its width is adapted to the beam cross-section. The lower flange is 18-28mm thick. The web thickness is 0.4-0.5 times that of the upper flange. The spacing between two adjacent circular holes on the web is 400mm and the diameter of the circular holes is 60-70mm.

[0016] The thickness of the upper and lower flange plates of the extended bracket 5 is 16-30mm, and the thickness of the web plate is 0.4-0.6 times the thickness of the flange plates; the thickness of the connecting plate 4 is 16-24mm, and the two sides of the connecting plate 4 are bent at 90° to form 100mm high flanges, and the height of the connecting plate 4 is greater than or equal to the height of the web plate of the extended bracket 5; the high-strength bolt 6 is an M20-M30 high-strength bolt.

[0017] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A rectangular tube steel column and concrete steel beam structure, comprising a rectangular tube steel column (1) and a concrete steel beam (3), wherein the concrete steel beam (3) is formed by welding webs between upper and lower flanges to form an I-shaped structure; characterized in that: The ends of the concrete steel beam (3) are fixedly provided with connecting plates (4). Circular holes are evenly distributed along the length of the beam on the web of the concrete steel beam (3). Stiffening ribs (2) are distributed vertically at equal intervals inside the rectangular tube steel column (1). An extended corbel (5) is provided on one side of the upper end of the rectangular tube steel column (1). The extended corbel (5) is formed by welding web between the upper and lower flange plates to form an I-shaped structure. The flange on one side of the extended corbel (5) is fully welded to the bevel of the rectangular tube steel column (1). The web of the extended corbel (5) is attached to the opposite side of the connecting plate (4) and fixed by several high-strength bolts (6).

2. The rectangular tube steel column and concrete steel beam structure according to claim 1, characterized in that: The rectangular tube steel column (1) is made of Q345 or higher high-strength steel with a wall thickness of 8-20mm. The distance between two adjacent stiffening ribs (2) is 600-800mm. The thickness of the stiffening rib (2) is 0.6-0.7 times the wall thickness of the rectangular tube steel column (1). The two sides of the stiffening rib (2) are fully welded to the inner wall of the rectangular tube steel column (1).

3. The rectangular tube steel column and concrete steel beam structure according to claim 1, characterized in that: The upper flange of the concrete steel beam (3) is 20-30mm thick and its width is adapted to the beam section. The lower flange is 18-28mm thick. The web is 0.4-0.5 times thicker than the upper flange. The distance between two adjacent circular holes on the web is 400mm and the diameter of the circular holes is 60-70mm.

4. The rectangular tube steel column and concrete steel beam structure according to claim 1, characterized in that: The thickness of the upper and lower flange plates of the extended bracket (5) is 16-30mm, and the thickness of the web plate is 0.4-0.6 times the thickness of the flange plate; the thickness of the connecting plate (4) is 16-24mm, and the two sides of the connecting plate (4) are bent at 90° to form a 100mm high flange, and the height of the connecting plate (4) is ≥ the height of the web plate of the extended bracket (5); the high-strength bolt (6) adopts M20-M30 high-strength bolt.

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