Connecting structure of steel-concrete composite beam and curtain wall
By pre-welding the embedded plate on the H-shaped steel frame in the factory, the problems of insufficient stress on PEC beams and obstructed concrete casting in prefabricated buildings are solved, and a rapid and standardized connection between steel-concrete composite beams and curtain walls are achieved. Improve construction efficiency and stress performance.
Patent Information
- Application Number
- CN202411475236.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-22
- Publication Date
- 2025-01-17
AI Technical Summary
In prefabricated buildings, the cross-sectional width of the PEC beam is small and the internal H-shaped steel web is insufficient. The traditional rear-mounted embedded parts method is difficult to meet the specification requirements. The curtain wall embedded parts will block concrete pouring, affecting the stress of the combined beam performance.
Pre-welded pre-embedded plates on the H-shaped steel frame in the factory to form an L-shaped structure to avoid holes on the construction site, ensure that concrete pouring is not hindered, and use steel connectors and galvanized support steel plates to quickly complete the combination beam and curtain wall assembly.
It improves construction efficiency, avoids the problem of insufficient stress on the H-shaped steel web, and ensures that the stress performance of the combined beam is not affected, achieving rapid and standardized installation of the connection structure.
Smart Images
Figure CN119321189A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the field of prefabricated buildings, and in particular to a connection structure of a steel-concrete composite beam and a curtain wall. Background Art
[0002] For traditional buildings with concrete structures, the embedded parts of the curtain wall are usually tied to the main concrete reinforcement first, and then poured in one piece to complete the connection. They can also be installed by post-embedded parts. However, for prefabricated buildings, the main structural beams are generally produced and prefabricated in the factory before being transported to the site for installation. Especially for PEC beams (steel-concrete composite beams with H-shaped steel inside and concrete poured on both sides of the H-shaped steel web), the cross-sectional width of the PEC beam is small and H-shaped steel is also set in the middle. If the construction site adopts the post-embedded parts method, the effective anchor bolts will not meet the requirements of the specification. Therefore, it is only possible to penetrate the web of the H-shaped steel inside the PEC beam and post-embed the plate. This method will affect the stress of the H-shaped steel itself.
[0003] Another traditional PEC beam curtain wall embedded structure is to set vertical partitions above and below the flange plate of the H-shaped steel, and set vertical reinforcing ribs behind the partitions. This practice will cause the concrete to be blocked and discontinuous during pouring, resulting in loose vibration behind the partitions, which will affect the stress condition of the entire composite beam. Summary of the invention
[0004] The present invention firstly discloses a connection structure of a steel-concrete composite beam and a curtain wall, in which an embedded plate is directly fixed on an H-shaped steel inside the composite beam in a factory, thereby facilitating the connection of the composite beam and the curtain wall at a construction site. The embedded plate will not block the concrete pouring of the composite beam in the factory, and the stress performance of the composite beam will not be affected.
[0005] In order to achieve the above object, the technical solution adopted by the present invention is: A connection structure of a steel-concrete composite beam and a curtain wall, comprising a prefabricated steel-concrete composite beam, a main flange of a building structure, a glass curtain wall, an upper curtain wall beam between layers, a lower curtain wall beam between layers, a curtain wall column, a steel connector, an upper supporting steel plate between layers, and a lower supporting steel plate between layers; the steel-concrete composite beam comprises an H-shaped steel, an embedded plate, and concrete, the embedded plate is arranged on one side of the web of the H-shaped steel, the embedded plate is divided into a vertical plate and a horizontal plate, the horizontal plate is vertically welded to the web of the H-shaped steel, the vertical plate is spaced and arranged in parallel with the web, the bottom end of the vertical plate is welded to the horizontal plate, the top end of the vertical plate is welded to the side end face of the upper flange of the H-shaped steel, concrete is poured on both sides of the web, and the vertical plate is exposed outside the concrete; A floor slab is arranged on the top of the steel-concrete composite beam, and a main flange of the building structure is arranged on the top edge side of the floor slab. The glass curtain wall is fixedly installed on the curtain wall beam and the curtain wall column. One end of the horizontally arranged steel connector is welded to the vertical plate, and the other end is fixed to the curtain wall column with bolts; one end of the upper supporting steel plate between layers is fixed to the main flange of the building structure, and the other end is fixed to the upper curtain wall beam between layers; one end of the lower supporting steel plate between layers is fixed to the lower flange of the steel-concrete composite beam, and the other end is fixedly connected to the lower curtain wall beam between layers; fireproof cotton is bonded to the tops of the upper supporting steel plate between layers and the lower supporting steel plate between layers.
[0006] Furthermore, the lower interlayer supporting steel plate forms a right-angle bending structure at one end close to the steel-concrete composite beam, the bending part of the lower interlayer supporting steel plate is fixed to the bottom of the lower flange by screws, and the other end of the lower interlayer supporting steel plate is fixed to the top of the lower interlayer curtain wall beam by screws or rivets, and the end of the side where the right-angle bending part of the lower interlayer supporting steel plate is located forms a raised hem, and a fire-proof sealant is arranged on the hem.
[0007] Furthermore, the interlayer upper supporting steel plate is divided into a first interlayer upper supporting steel plate and a second interlayer upper supporting steel plate. The first interlayer upper supporting steel plate forms a right-angle bending structure at one end close to the curtain wall column, and the other end of the first interlayer upper supporting steel plate forms a raised folded edge; the second interlayer upper supporting steel plate has multiple right-angle bending structures, and the first bending structure is respectively attached to the top surface and the outer side surface of the flange of the main body of the building structure, and one end of the first interlayer upper supporting steel plate presses one end of the second interlayer upper supporting steel plate, and the two are connected by screws or rivets The nails are fixed to the top of the flange of the main body of the building structure, fireproof sealant is set at the end flange of the upper supporting steel plate of the first interlayer, and the right-angle bending structure of the other end of the upper supporting steel plate of the first interlayer is fixed to the side end surface of the upper curtain wall beam of the interlayer by screws or rivets; the upper supporting steel plate of the second interlayer that is in contact with the side of the flange of the main body of the building structure is horizontally bent to form a second bending structure, and fireproof cotton is bonded to the horizontal section of the second bending structure. The horizontal section of the second bending structure is bent upward through the side and fixed to the curtain wall column by screws or rivets.
[0008] Furthermore, the interlayer upper supporting steel plate and the interlayer lower supporting steel plate are both made of galvanized steel plates.
[0009] The steel-concrete composite beam (hereinafter referred to as "composite beam") designed by the present invention has embedded plates welded to the internal H-shaped steel frame in advance during prefabrication in the factory, thus avoiding a series of problems caused by the opening of holes in the web of the H-shaped steel when the composite beam is made into a post-installed curtain wall embedded part at the construction site. The construction site can be directly assembled, which helps to speed up the construction progress; there is no need to open holes on the web of the H-shaped steel, and it will not affect the stress performance of the composite beam; the embedded plate structure designed by the present invention is pre-connected to the H-shaped steel frame inside the composite beam in the factory by welding, and the embedded plate will not block the concrete pouring during the prefabrication of the PEC beam. By using the composite beam structure designed by the present invention, in combination with steel connectors and galvanized supporting steel plates, the assembly of the composite beam and the glass curtain wall can be quickly completed, which can reduce the on-site construction procedures and speed up the construction progress. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1 A cross-sectional view of the connection structure between the composite beam and the curtain wall in the embodiment; Figure 2 for Figure 1 The enlarged view of point B in the middle; Figure 3 for Figure 1 Enlarged view of point C in the middle; Figure 4 for Figure 1 Middle AA section; Figure 5 It is a schematic diagram of the connection structure between the H-shaped steel frame and the embedded plate inside the composite beam; Figure 6 for Figure 5 Schematic diagram of the structure after precast concrete pouring.
[0011] Reference numerals: 1. Steel-concrete composite beam; 11. Upper flange; 12. Lower flange; 13. Web; 14. Concrete; 2. Main flange of building structure; 3. Embedded plate; 31. Vertical plate; 32. Horizontal plate; 4. Steel connectors; 5. Screws or rivets; 6. Glass curtain wall; 61. Upper curtain wall beam between layers; 62. Lower curtain wall beam between layers; 63. Curtain wall column; 7. Galvanized supporting steel plate; 71. Upper supporting steel plate between the first layers; 72. Upper supporting steel plate between the second layers; 73. Lower supporting steel plate between layers; 8. Fireproof cotton; 9. Fireproof sealant. DETAILED DESCRIPTION
[0012] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.
[0013] This embodiment mainly discloses a connection structure between a steel-concrete composite beam and a curtain wall, such as Figures 1 to 6As shown, it mainly includes a steel-concrete composite beam 1, a main flange 2 of a building structure, a glass curtain wall 6, a curtain wall beam, a curtain wall column 63, a steel connector 4 and a galvanized supporting steel plate 7 with a bending structure. Figure 5 and Figure 6 As shown, the interior of the curtain wall is composed of an H-shaped steel and an embedded plate 3 to form a skeleton. The H-shaped steel is divided into an upper flange 11, a lower flange 12 and a web 13. Concrete 14 is poured on both sides of the web 13. The embedded plate 3 is used as an embedded part when the curtain wall is connected. The embedded plate 3 in this embodiment is composed of a vertical plate 31 and a horizontal plate 32 to form an L-shaped structure in vertical section. After the embedded plate 3 is prefabricated in the factory, it is directly assembled to the H-shaped steel by welding, that is: the horizontal plate 32 is set between the upper flange 11 and the lower flange 12, the horizontal plate 32 is parallel to the upper and lower flanges, and one end of the horizontal plate 32 is welded to the web 13; the vertical plate 31 is parallel to the web 13, and a certain distance is set between the vertical plate 31 and the web 13 so as not to affect the pouring and vibration of the concrete 14 on the side of the web 13, the bottom of the vertical plate 31 is welded to the top of the horizontal plate 32 close to the outer end, the top surface of the vertical plate 31 is flush with the top surface of the upper flange 11, and the top end of the vertical plate 31 is welded to the side end surface of the upper flange 11. Figure 5 After the skeleton is formed, concrete 14 is poured on both sides of the web 13 to form Figure 6 In the composite beam shown, the concrete 14 on the side where the embedded plate is located does not cover the vertical plate 31, and the outer surface of the vertical plate 31 is exposed to facilitate on-site welding with the steel connector 4 at the construction site.
[0014] After the composite beam 1 is prefabricated in the factory, it is transported to the construction site, where the composite beam 1 and the glass curtain wall 6 are installed. Figure 1 As shown, the glass curtain wall 6 includes curtain wall columns 63, upper curtain wall beams 61 between layers, and lower curtain wall beams 62 between layers. The glass curtain wall 6 can be installed with the curtain wall columns 63 and the curtain wall beams according to the prior art. A floor slab is arranged on the top of the composite beam 1, and the top edge side of the floor slab is constructed to form the main flange 2 of the building structure. In this embodiment, a steel connector 4 is used to connect the composite beam 1 and the curtain wall columns 63. The steel connecting plate 4 is arranged horizontally, one end of which is welded to the exposed vertical plate 31 of the composite beam 1, and the other end is fixed to the curtain wall columns 63 with bolts.
[0015] The galvanized supporting steel plate 7 in this embodiment can be divided into an upper supporting steel plate and a lower supporting steel plate 73 according to its installation position between the layers. The upper supporting steel plate is mainly used for the connection between the main body 2 of the building structure and the curtain wall, and the lower supporting steel plate 73 is mainly used for the connection between the lower half of the composite beam 1 and the curtain wall. Since the embedded plate 3 is located in the upper half of the composite beam 1, the upper half of the composite beam 1 is connected to the curtain wall column 63 through the above-mentioned steel connector 4, while the lower half of the composite beam 1 is connected to the lower curtain wall beam 62 through the lower supporting steel plate 73. Figure 3 As shown, the interlayer lower supporting steel plate 73 has a right-angle bending structure, and the bending part is located near one end of the composite beam 1. The right-angle bending part is formed by bending, and one end of the interlayer lower supporting steel plate 73 is fixed to the bottom of the lower flange 12 of the composite beam 1 by screws, and the other end of the interlayer lower supporting steel plate 73 is placed on the top of the interlayer lower curtain wall beam 62 and fixed to the interlayer lower curtain wall beam 62 by screws or rivets 5. In order to improve the fire prevention effect, fireproof cotton 8 is also bonded to the top of the interlayer lower supporting steel plate 73, and the end of the interlayer lower supporting steel plate 73 fixed to the composite beam 1 is bent to form a raised hem, and a fireproof sealant 9 is provided at the hem.
[0016] like Figure 2 As shown, the interlayer upper supporting steel plate in this embodiment is divided into a first interlayer upper supporting steel plate 71 and a second interlayer upper supporting steel plate 72, and the interlayer upper supporting steel plate is also a steel plate with a bending structure. Among them, the first interlayer upper supporting steel plate 71 forms a right-angle bending structure at one end close to the curtain wall column 63. The second interlayer upper supporting steel plate 72 has three bending structures in different directions, namely: Figure 2 The direction shown is for reference. One end of the second-layer upper supporting steel plate 72 is placed on the top of the main flange 2 of the building structure. One end of the first-layer upper supporting steel plate 71 presses one end of the second-layer upper supporting steel plate 72. Then, the first-layer upper supporting steel plate 71 and the second-layer upper supporting steel plate 72 are fixed together on the top of the main flange 2 of the building structure by screws or rivets 5. The second-layer upper supporting steel plate 72 is bent downward at a right angle along the outer wall of the main flange 2 of the building structure (the first bend), and then bent in a direction parallel to the curtain wall beam (the second bend) to form a horizontal section. The horizontal section is bent upward through the side and fixed to the curtain wall column 63 by screws or rivets. The bend of the first-layer upper supporting steel plate 71 is fixed to the side end surface of the interlayer upper curtain wall beam 61 by screws or rivets 5. Also for better fire prevention effect, fireproof cotton 8 is bonded to the top of the horizontal section of the second interlayer upper supporting steel plate 72, so that the two ends of the first interlayer upper supporting steel plate 71 form raised folded edges respectively, and fireproof sealant 9 is set at the folded edges at both ends.
[0017] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A connection structure between a steel-concrete composite beam and a curtain wall, characterized in that: It includes prefabricated steel-concrete composite beams, main flanges of building structures, glass curtain walls, upper curtain wall beams between layers, lower curtain wall beams between layers, curtain wall columns, steel connectors, upper supporting steel plates between layers, and lower supporting steel plates between layers; the steel-concrete composite beams include H-shaped steel, embedded plates, and concrete, the embedded plates are arranged on one side of the web of the H-shaped steel, the embedded plates are divided into vertical plates and horizontal plates, the horizontal plates are vertically welded to the web of the H-shaped steel, the vertical plates are spaced and arranged parallel to the web, the bottom ends of the vertical plates are welded to the horizontal plates, the top ends of the vertical plates are welded to the side end faces of the upper flanges of the H-shaped steel, concrete is poured on both sides of the web, and the vertical plates are exposed outside the concrete; A floor slab is arranged on the top of the steel-concrete composite beam, and a main flange of the building structure is arranged on the top edge side of the floor slab. The glass curtain wall is fixedly installed on the curtain wall beam and the curtain wall column. One end of the horizontally arranged steel connector is welded to the vertical plate, and the other end is fixed to the curtain wall column with bolts; one end of the upper supporting steel plate between layers is fixed to the main flange of the building structure, and the other end is fixed to the upper curtain wall beam between layers; one end of the lower supporting steel plate between layers is fixed to the lower flange of the steel-concrete composite beam, and the other end is fixedly connected to the lower curtain wall beam between layers; fireproof cotton is bonded to the tops of the upper supporting steel plate between layers and the lower supporting steel plate between layers.
2. The connection structure of a steel-concrete composite beam and a curtain wall according to claim 1, characterized in that: The lower interlayer supporting steel plate is formed with a right-angled bending structure at one end close to the steel-concrete composite beam, the bending part of the lower interlayer supporting steel plate is fixed to the bottom of the lower flange by screws, and the other end of the lower interlayer supporting steel plate is fixed to the top of the lower interlayer curtain wall beam by screws or rivets, and the end of the side where the right-angled bending part of the lower interlayer supporting steel plate is located forms a raised hem, and a fireproof sealant is arranged on the hem.
3. The connection structure of a steel-concrete composite beam and a curtain wall according to claim 1, characterized in that: The interlayer upper supporting steel plate is divided into a first interlayer upper supporting steel plate and a second interlayer upper supporting steel plate. The first interlayer upper supporting steel plate forms a right-angle bending structure at one end close to the curtain wall column, and the other end of the first interlayer upper supporting steel plate forms a raised folded edge; the second interlayer upper supporting steel plate has multiple right-angle bending structures, and the first bending structure is respectively in contact with the top surface and the outer side surface of the flange of the main body of the building structure, and one end of the first interlayer upper supporting steel plate presses one end of the second interlayer upper supporting steel plate, and the two are fixed by screws or rivets. It is fixed on the top of the main flange of the building structure, and fireproof sealant is arranged at the end flange of the upper supporting steel plate of the first interlayer. The right-angle bending structure of the other end of the upper supporting steel plate of the first interlayer is fixed to the side end surface of the upper curtain wall beam of the interlayer by screws or rivets; the upper supporting steel plate of the second interlayer that is in contact with the side of the main flange of the building structure is horizontally bent to form a second bending structure, and fireproof cotton is bonded to the horizontal section of the second bending structure. The horizontal section of the second bending structure is bent upward through the side and fixed to the curtain wall column by screws or rivets.
4. The connection structure of a steel-concrete composite beam and a curtain wall according to claim 1, characterized in that: The interlayer upper supporting steel plate and the interlayer lower supporting steel plate are both made of galvanized steel plates.