Full-prefabricated concrete filled steel tubular column-PEC beam frame structure

Abstract

The utility model discloses a full-prefabricated concrete filled steel tubular column-PEC beam frame structure, and belongs to the technical field of assembly type building engineering. The full-prefabricated concrete filled steel tubular column-PEC beam frame structure comprises prefabricated concrete filled steel tubular columns, prefabricated PEC beams and prefabricated pi-shaped connecting pieces. Bolt holes are reserved in a node area of the prefabricated concrete-filled steel tubular column, and bolt pipelines are pre-buried; bolt holes are reserved in the ends of the prefabricated PEC beams, and bolt pipelines are pre-buried in cavities; the prefabricated concrete filled steel tubular column and the prefabricated PEC beam are assembled through a pi-shaped connecting piece, and the prefabricated pi-shaped connecting piece is formed by welding a flange plate, a web plate and a longitudinal rib plate. All the components involved in the utility model can be prefabricated and processed in a factory and only need to be spliced and assembled on a construction site, so that the problems of a large amount of welding work and pouring wet work on the construction site are avoided, and the construction efficiency and the construction quality are improved; compared with a traditional concrete filled steel tubular column-steel beam structure, the fireproof durability is remarkably improved, the rigidity is increased, and the steel utilization rate is increased; in addition, the node connection mode is semi-rigid, and the energy dissipation capacity of the node is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of assembled building engineering, and specifically relates to a fully prefabricated steel tube concrete column-PEC beam frame structure. Background Art

[0002] In order to reduce wet work at construction sites, respond to the concept of green development, and achieve sustainable development of the construction industry, the country has vigorously promoted prefabricated buildings. Based on this, steel tube concrete-steel beam frame structures are used in large-span structures, high-rise buildings and industrial buildings due to their easy assembly.

[0003] The steel tube concrete column-steel beam structure is a composite structure formed by prefabricated steel tube concrete columns and prefabricated steel beams through different connection structures. It has the advantages of easy assembly and simple structure, but it has problems such as poor fire and corrosion resistance of steel beams, low steel utilization rate, and large cross-sectional size.

[0004] Solving the shortcomings of traditional steel tube concrete column-steel beam frame structures, giving full play to the material properties of components, improving the fire resistance and corrosion resistance of the structure, and realizing fully assembled production are issues that need to be addressed urgently. Summary of the invention

[0005] The utility model discloses a fully prefabricated steel tube concrete column-PEC beam frame structure, which replaces steel beams with prefabricated PEC beams and adopts a π-shaped connector form, thereby solving the problems existing in the steel tube concrete column-steel beam frame structure.

[0006] In order to achieve the above purpose, the utility model adopts the following technical means:

[0007] A fully prefabricated steel tube concrete column-PEC beam frame structure, characterized in that it includes a prefabricated steel tube concrete column, a prefabricated PEC beam and a prefabricated π-shaped connector, wherein bolt holes are reserved on both sides of the middle of the prefabricated steel tube concrete column, and bolt pipes are embedded inside; a cover plate and a welding plate are arranged at the end of the prefabricated PEC beam, bolt holes are reserved at the node connection, and bolt pipes are embedded in the cavity; the prefabricated π-shaped connector is composed of five steel plates, and bolt holes are reserved for the horizontal steel plates and the vertical steel plates, and the π-shaped connector is formed by connecting through wedge-shaped ribs, and the prefabricated steel tube concrete column-prefabricated π-shaped connector-prefabricated PEC beam are spliced ​​and assembled in sequence through high-strength bolts.

[0008] Preferably, bolt holes are reserved in the node area of ​​the prefabricated steel tube concrete column, bolt pipes are pre-embedded, and sufficient bolt hole diameters are reserved in accordance with the specification requirements to meet the layout and construction requirements.

[0009] Preferably, the prefabricated PEC beam comprises an H-shaped steel beam and beam longitudinal reinforcement along the length direction of the beam, bolt holes are reserved and bolt pipes are embedded on the H-shaped steel beam at the corresponding position of the connection node, a plurality of beam longitudinal reinforcements are arranged along both sides of the H-shaped steel beam, and a plurality of C-shaped connecting rods are arranged on the outside of the beam longitudinal reinforcement at a certain interval, and the H-shaped steel beam, beam longitudinal reinforcement, C-shaped connecting rod and beam-filled concrete are connected as a whole to form a prefabricated PEC beam.

[0010] Further preferably, bolt holes are reserved at the ends of the prefabricated PEC beams, bolt pipes are embedded in the cavity, and cover plates and welding plates are arranged at the ends. The cover plates on both sides are arranged differently, and the welding plates are welded to the cover plates at both ends for lap welding of the longitudinal reinforcement of the beams.

[0011] Preferably, the π-shaped connector is composed of five steel plates, namely a flange plate, two web plates and two longitudinal ribs, the two web plates are symmetrically welded at both ends of the flange plate, and the longitudinal ribs are respectively welded to the flange plate and the web plate to form a π-shaped connector, wherein the flange plate has reserved bolt holes connected to the prefabricated steel tube concrete column, and the web plate has reserved bolt holes connected to the prefabricated PEC beam.

[0012] It is further preferred that the reserved bolt holes on the vertical steel plate are consistent in position with the bolt holes on the prefabricated steel tube concrete column, and are symmetrically distributed on both sides; the reserved bolt holes on the horizontal steel plate are consistent in position with the bolt holes on the prefabricated PEC beam, and are symmetrically distributed up and down, and the prefabricated PEC beam is connected to the prefabricated π-shaped connecting piece by high-strength bolts penetrating the upper and lower flanges; the wedge-shaped rib is in the shape of an inverted triangle, which mainly plays a reinforcement role.

[0013] The advantages of the utility model are mainly manifested in the following aspects:

[0014] 1. The utility model realizes the assembly connection of the fully prefabricated steel tube concrete column-PEC beam π-shaped connector. The connection node has a simple structure and is easy to operate. The steel tube concrete column and PEC beam components can be directly installed on site after the project is prefabricated, which greatly improves the construction efficiency.

[0015] 2. The utility model adopts a combination of prefabricated steel tube concrete columns and prefabricated PEC beams, and utilizes the interaction between the steel tube and concrete in the steel tube concrete columns to solve the problems of poor fire resistance and corrosion resistance of the steel tube concrete column-steel beam frame structure, low steel utilization rate, and mismatch of beam-column linear stiffness.

[0016] 3. The utility model adopts full bolt connection. The steel tube concrete column, PEC beam and π-shaped connector are prefabricated in the factory. Only high-strength bolts are needed for installation on the construction site. The construction efficiency is greatly improved, the on-site construction steps are simplified, and it is in line with the green development concept of prefabricated buildings.

[0017] 4. The utility model adopts a semi-rigid node connection form, which is connected by a π-shaped connector. Compared with the traditional rigid node connection form, the semi-rigid node has a certain energy dissipation capacity, which can improve the earthquake resistance and bending resistance of the building. After the earthquake, the main structure is still in the elastic stage range, and the semi-rigid node can be quickly reinforced and repaired. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly describe the technical solution of the utility model, the drawings in the prior art or embodiment description are briefly introduced as follows:

[0019] Figure 1 This is a schematic diagram of a prefabricated steel tube concrete column-PEC beam π-shaped connection assembled frame structure;

[0020] Figure 2 This is a schematic diagram of the prefabricated steel tube concrete column-PEC beam π-shaped connection assembled frame steel skeleton structure;

[0021] Figure 3 This is a schematic diagram of the prefabricated steel tube concrete column-PEC beam node structure;

[0022] Figure 4 This is a schematic diagram of the assembly of the prefabricated steel tube concrete column-PEC beam node;

[0023] Figure 5 This is a schematic diagram of the prefabricated steel tube concrete column structure;

[0024] Figure 6 This is a schematic diagram of the prefabricated PEC beam structure;

[0025] Figure 7 This is a schematic diagram of the structure of a prefabricated π-shaped connector.

[0026] In the figure: 1. Prefabricated steel tube concrete column, 2. Prefabricated PEC beam, 3. Prefabricated π-shaped connector, 4. Steel tube, 5. Concrete filled inside the steel tube; 6. H-shaped steel beam, 7. Beam longitudinal reinforcement, 8. C-shaped connecting rod, 9. Beam filled with concrete, 10. Cover plate, 11. Welding plate, 12. Beam web, 13. Flange plate, 14. Web, 15. Longitudinal rib, 16. High-strength bolts, 17. Bolt pipe (column), 18. Bolt pipe (beam) DETAILED DESCRIPTION

[0027] The following will be combined with the drawings of the embodiments of the utility model to make a clear and detailed description of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, other embodiments obtained by other ordinary technicians in the field without creative work are all within the protection scope of the utility model.

[0028] The utility model discloses a fully prefabricated steel tube concrete column-PEC beam frame structure, comprising a prefabricated steel tube concrete column 1, a prefabricated PEC beam 2 and a prefabricated π-shaped connector, wherein the prefabricated steel tube concrete column 1, the prefabricated PEC beam 2 and the prefabricated π-shaped connector 3 are connected together by high-strength bolts to form a prefabricated steel tube concrete column-PEC beam π-shaped connection assembled frame structure.

[0029] The prefabricated steel tube concrete column 1 includes a steel tube 4 arranged along the length direction of the column body and a column filling concrete 5 poured inside the steel tube. Bolt holes are reserved in the middle of the steel tube 4 and are symmetrically distributed on both sides.

[0030] The bolt holes reserved in the steel pipe 4 should reserve sufficient bolt hole diameters according to the specification requirements to meet the layout and structural requirements, and a bolt pipe 17 should be embedded inside the steel pipe 4 to prevent the subsequent concrete pouring from causing the high-strength bolts 16 to be unable to pass through.

[0031] The prefabricated PEC beam 2 includes an H-shaped steel beam 6 and a beam longitudinal reinforcement 7 along the length direction of the beam. Bolt holes are reserved on the H-shaped steel beam 6 at the corresponding position of the connection node and bolt pipes 18 are embedded. Multiple beam longitudinal reinforcements 7 are arranged along both sides of the H-shaped steel beam 6. Multiple C-shaped connecting rods 8 are arranged on the outside of the beam longitudinal reinforcement 7 at a certain interval. The H-shaped steel beam 6, beam longitudinal reinforcement 7, C-shaped connecting rods 8 and beam filling concrete 9 are connected as a whole to form a prefabricated PEC beam.

[0032] The two ends of the prefabricated PEC beam 2 are provided with a cover plate 10 and a welding plate 11. The cover plate 10 penetrates the beam web 12 at the connection node. The beam web 12 of the H-shaped steel beam 6 is disconnected at the node end, and the upper and lower flanges continue to extend out. The outer side of the cover plate 10 is respectively welded to the upper and lower flanges and the beam web 12; on the other side, the cover plate 10 is divided into two pieces, which are respectively welded to the two sides of the H-shaped steel beam 6. The reason for the different arrangement of the cover plates at the two ends is that some quasi-static tests can be done on the other side, and the H-shaped steel beam 6 needs to be extended out as a loading head. The welding plate 11 is welded to the cover plates 10 at both ends for lap welding of the longitudinal reinforcement 7 of the beam.

[0033] The prefabricated π-shaped connector 3 is composed of five steel plates, namely a flange plate 13, two web plates 14 and two longitudinal ribs 15. The two web plates 14 are symmetrically welded to the flange plate 13. The two longitudinal ribs 15 are respectively welded to the flange plate 13 and the web plate 14 to form a π-shaped connector 3, wherein the flange plate 13 has reserved bolt holes for connection with the prefabricated steel tube concrete column, and the web plate 14 has reserved bolt holes for connection with the prefabricated PEC beam 2.

[0034] The reserved bolt holes on the flange plate 13 are consistent with the positions of the bolt holes on the prefabricated steel tube concrete column 1, and are symmetrically distributed on both sides; the reserved bolt holes on the web 14 are consistent with the positions of the bolt holes on the prefabricated PEC beam 2, and are symmetrically distributed up and down. The prefabricated PEC beam 2 and the prefabricated π-shaped connecting piece 3 are connected by high-strength bolts 16 that penetrate the upper and lower flanges of the PEC beam; the longitudinal rib 15 is in an inverted triangle shape, which mainly plays a reinforcement role.

[0035] Specific structure such as Figure 1 As shown, the embodiment also provides a method for preparing a fully prefabricated steel tube concrete column-PEC beam frame structure, comprising the following steps:

[0036] S1. Bolt holes are reserved on both sides of the middle of the steel tube according to the drawings, and bolt pipes are embedded inside the prefabricated steel tube concrete column. Then, concrete is poured inside the steel tube and cured, and finally the prefabricated steel tube concrete column is made.

[0037] S2. Reserve bolt holes at the corresponding positions of the prefabricated PEC beam node connections according to the drawings, and embed bolt pipes inside the prefabricated PEC beams. Set a through-type cover plate at the connection node, weld the outer side of the cover plate to the upper and lower flange plates of the H-shaped steel beam, weld the middle of the cross section of the cover plate to the web plate, and then weld the welding plate to the cross section of the cover plate. The cover plate on the other side of the PEC beam is divided into two pieces, which are welded to the upper and lower flange plates and web plates of the H-shaped steel beam, and then weld the welding plate to the cross section of the cover plate. The H-shaped steel beam, cover plate, welding plate and bolt pipe together constitute a closed space similar to a mold;

[0038] S3. Arrange beam longitudinal reinforcement on both sides of the H-shaped steel beam according to the drawings. The two ends of the beam longitudinal reinforcement are overlapped on the welding plate. Arrange multiple C-shaped connecting rods at a certain interval on the outside of the beam longitudinal reinforcement. The bent section of the C-shaped connecting rod is welded on the web of the H-shaped steel beam. The H-shaped steel beam, cover plate, welding plate, bolt pipe, beam longitudinal reinforcement and C-shaped connecting rod are connected as a whole to form a prefabricated PEC beam steel skeleton;

[0039] S4. Pour the beam filling concrete in the prefabricated PEC beam steel frame. When pouring, pay attention to the need to pour the concrete on both sides. After the concrete strength on one side reaches 70% of the yield strength, pour the other side, and finally complete the production of the prefabricated PEC beam;

[0040] S5. Reserve bolt holes at corresponding positions of the prefabricated π-shaped connector according to the drawings, first weld the web and the longitudinal ribs together to form a whole, then weld the whole to the flange plate, and finally complete the production of the prefabricated π-shaped connector;

[0041] S6. Transport the prefabricated steel tube concrete columns, prefabricated PEC beams, and prefabricated π-shaped connectors to the site. First, connect the prefabricated steel rod concrete columns and prefabricated π-shaped connectors together through high-strength bolts. Then install a layer of prefabricated steel tube concrete columns according to the drawings. Then hoist the prefabricated PEC beams for assembly. During assembly, connect and assemble them with high-strength bolts, and ensure that the bolts reach the preload force. Then, carry out flow construction in sequence to form a frame structure.

[0042] The characteristics of this utility model are analyzed as follows:

[0043] 1. The utility model realizes the assembly connection of the fully prefabricated steel tube concrete column-PEC beam π-shaped connector. The connection node has a simple structure and is easy to operate. The steel tube concrete column and PEC beam components can be directly installed on site after the project is prefabricated, which greatly improves the construction efficiency.

[0044] 2. The utility model adopts a combination of prefabricated steel tube concrete columns and prefabricated PEC beams, and utilizes the interaction between the steel tube and concrete in the steel tube concrete columns to solve the problems of poor fire resistance and corrosion resistance of the steel tube concrete column-steel beam frame structure, low steel utilization rate, and mismatch of beam-column linear stiffness.

[0045] 3. The utility model adopts full bolt connection. The steel tube concrete column, PEC beam and π-shaped connector are prefabricated in the factory. Only high-strength bolts are needed for installation on the construction site. The construction efficiency is greatly improved, the on-site construction steps are simplified, and it is in line with the green development concept of prefabricated buildings.

[0046] 4. The utility model adopts a semi-rigid node connection form, which is connected by a π-shaped connector. Compared with the traditional rigid node connection form, the semi-rigid node has a certain energy dissipation capacity, which can improve the earthquake resistance and bending resistance of the building. After the earthquake, the main structure is still in the elastic stage range, and the semi-rigid node can be quickly reinforced and repaired.

[0047] The above selected embodiments are only used to help illustrate the utility model. The selected examples do not describe all the details of the invention, nor do they limit the utility model to the specific preparation method described. Obviously, according to the content of this specification, the embodiments can be modified and changed in many ways. This specification selects and specifically describes the embodiments in order to better explain the principles and practical applications of the utility model, so that ordinary technicians in the engineering field can better understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A fully prefabricated steel tube concrete column-PEC beam frame structure, comprising a prefabricated steel tube concrete column (1), a prefabricated PEC beam (2) and a prefabricated π-shaped connector (3), characterized in that: The prefabricated steel tube concrete column (1), the prefabricated PEC beam (2) and the prefabricated π-shaped connecting piece (3) have bolt holes reserved at corresponding positions, and the prefabricated steel tube concrete column (1), the prefabricated π-shaped connecting piece (3) and the prefabricated PEC beam (2) are spliced ​​and assembled by high-strength bolts (16); A cover plate (10) and a welding plate (11) are provided at both ends of the prefabricated PEC beam (2); the cover plate (10) penetrates the beam web (12) at the connection node; the H-shaped steel beam (6) and the beam web (12) are disconnected at the node end, and the upper and lower flanges continue to extend out; the outer side of the cover plate (10) is respectively welded to the upper and lower flanges and the beam web (12); the cover plate (10) on the other side is divided into two pieces, which are respectively welded to both sides of the H-shaped steel beam (6); the welding plate (11) is welded to the cover plates (10) at both ends; and the longitudinal reinforcement (7) of the welded beam is overlapped on the welding plate (11); The beam longitudinal reinforcement is arranged along both sides of the H-shaped steel beam, and a plurality of C-shaped connecting rods are arranged at a certain interval outside the beam longitudinal reinforcement. The H-shaped steel beam, the beam longitudinal reinforcement, the C-shaped connecting rod and the beam filled concrete are connected as a whole to form a prefabricated PEC beam; The prefabricated π-shaped connector (3) is composed of five steel plates, namely a flange plate (13), two web plates (14) and two longitudinal rib plates (15). The two web plates are symmetrically welded to the two ends of the flange plate, and the longitudinal rib plates (15) are respectively welded to the flange plate and the web plate to form a π-shaped connector, wherein the flange plate (13) has reserved bolt holes for connection with the prefabricated steel tube concrete column (1), and the web plate (14) has reserved bolt holes for connection with the prefabricated PEC beam (2).

2. A fully prefabricated steel tube concrete column-PEC beam frame structure according to claim 1, characterized in that: The node area of ​​the prefabricated steel tube concrete column (1) is provided with reserved bolt holes and pre-buried bolt pipes.

3. The fully prefabricated steel tube concrete column-PEC beam frame structure according to claim 1, characterized in that: The reserved bolt holes on the flange plate (13) are in the same position as the bolt holes on the prefabricated steel tube concrete column (1), and are symmetrically distributed on both sides; the reserved bolt holes on the web plate (14) are in the same position as the bolt holes on the prefabricated PEC beam (2), and are symmetrically distributed up and down; the prefabricated PEC beam (2) and the prefabricated π-shaped connector (3) are connected by high-strength bolts (16) that penetrate the upper and lower flanges; and the longitudinal rib plate (15) is in an inverted triangle shape.

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