PEC beam and connecting structure of PEC beam and curtain wall

Abstract

The utility model relates to a PEC beam and a connecting structure of the PEC beam and a curtain wall, the PEC beam comprises H-shaped steel, an embedded plate and concrete, the embedded plate comprises a vertical plate and a horizontal plate, the horizontal plate is perpendicular to a web of the H-shaped steel, the vertical plate is parallel to the web, one end of the horizontal plate is fixed on one side of the web of the H-shaped steel, and the other end of the horizontal plate is fixed on the other side of the web of the H-shaped steel. The vertical plate and the horizontal plate are arranged on the same side of the web plate, the bottom end of the vertical plate is fixed to the horizontal plate, the top end of the vertical plate is fixedly connected with the side end face of the upper flange of the H-shaped steel, concrete is poured to the two sides of the web plate, and the concrete on the side where the embedded plate is located does not cover the vertical plate. A vertical plate of the PEC beam is connected with a curtain wall stand column through a steel connecting piece, the building structure body is connected with the curtain wall through an interlayer upper bearing steel plate, the bottom of the PEC beam is connected with an interlayer lower curtain wall cross beam through an interlayer lower bearing steel plate, and fireproof cotton is arranged at the top of the bearing steel plate. The connecting structure is good in stress performance and rapid in construction.

Description

Technical Field

[0001] The utility model relates to the field of prefabricated buildings, and in particular to a PEC beam and a connection structure between the PEC beam and a curtain wall. Background Art

[0002] For traditional buildings with concrete structures, the curtain wall's embedded parts are usually first tied to the main concrete reinforcement, then cast in one piece simultaneously to complete the connection. They can also be installed using post-embedded parts. However, in prefabricated buildings, the main structural beams are generally produced and prefabricated in the factory before being transported to the site for installation. This is especially true for PEC beams (steel-concrete composite beams with H-shaped steel inside and concrete poured on both sides of the H-shaped steel web). PEC beams have a smaller cross-sectional width and an H-shaped steel in the middle. If the construction site uses post-embedded parts, the effective anchor bolt reinforcement will not meet the specification requirements. Therefore, the web of the H-shaped steel inside the PEC beam can only be penetrated by post-embedded plates, which 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. Utility Model Content

[0004] The utility model firstly discloses a PEC beam. By arranging pre-embedded plates on H-shaped steel inside the PEC beam in advance in a factory, the connection between the PEC beam and the curtain wall at the construction site is facilitated. The arranged pre-embedded plates will not block the concrete pouring of the PEC beam in the factory, and the stress-bearing performance of the PEC beam will not be affected.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the present utility model is:

[0006] A PEC beam includes an H-shaped steel, an embedded plate and concrete. The embedded plate includes a vertical plate and a horizontal plate. The horizontal plate is perpendicular to the web of the H-shaped steel, and the vertical plate is parallel to the web. One end of the horizontal plate is fixed to one side of the web of the H-shaped steel. The vertical plate and the horizontal plate are arranged on the same side of the web. The bottom end of the vertical plate is fixed to the horizontal plate. The top end of the vertical plate is fixedly connected to the side end surface of the upper flange of the H-shaped steel. Concrete is poured on both sides of the web, and the concrete on the side where the embedded plate is located does not cover the vertical plate.

[0007] Based on the above-mentioned PEC beam, the utility model also discloses a connection structure between a PEC beam and a curtain wall, comprising the above-mentioned PEC beam, a building structure main body flange, a glass curtain wall, a curtain wall beam, a curtain wall column, a steel connector and a galvanized supporting steel plate with a bending structure, wherein the building structure main body flange is located at the top of the PEC beam, the galvanized supporting steel plate is divided into an upper interlayer supporting steel plate and a lower interlayer supporting steel plate, the curtain wall beam is divided into an upper interlayer curtain wall beam and a lower interlayer curtain wall beam, the curtain wall column and the exposed vertical plate of the PEC beam are fixedly connected by a steel connector, one end of the upper interlayer supporting steel plate is fixed to the building structure main body flange, and the other end is fixed to the upper interlayer curtain wall beam, one end of the lower interlayer supporting steel plate is fixed to the lower flange of the PEC beam, and the other end is fixedly connected to the lower interlayer curtain wall beam.

[0008] Furthermore, the steel connector is perpendicular to the vertical plate, one end of the steel connector is welded to the vertical plate, and the other end of the steel connector is fixed to the curtain wall column by bolts.

[0009] Furthermore, the lower interlayer supporting steel plate forms a bent structure near one end of the PEC beam, one end of the lower interlayer supporting steel plate is fixed to the bottom of the lower flange of the PEC beam 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.

[0010] Furthermore, the end of the lower interlayer supporting steel plate fixed on the PEC beam forms a raised hem, and a fireproof sealant is provided at the hem.

[0011] Furthermore, fireproof cotton is provided on the top of the lower supporting steel plate between the layers.

[0012] 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 bending structure at one end close to the curtain wall column; the second interlayer upper supporting steel plate has a bending structure in different directions, 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 to the top of the flange of the main body of the building structure by screws or rivets, and the other end of the first interlayer upper supporting steel plate is fixed to the side end surface of the interlayer upper curtain wall beam by screws or rivets; the second interlayer upper supporting steel plate is respectively fitted with the top and side surfaces of the flange of the main body of the building structure through the first bending, and a middle section perpendicular to the curtain wall column is formed through the second bending, and the middle section is fixed to the curtain wall column by screws or rivets after being bent upward at the side.

[0013] Furthermore, both ends of the upper supporting steel plate between the first layers are formed with raised hems, and fireproof sealant is provided at the hems.

[0014] Furthermore, fireproof cotton is provided on the top of the middle section of the upper supporting steel plate between the second layers.

[0015] The PEC beam designed in this utility model has embedded plates welded to the internal H-shaped steel frame during factory prefabrication. This avoids a series of problems caused by the need to drill holes in the H-shaped steel webs when the PEC beam is prefabricated as a curtain wall embedded component at the construction site. Assembly can be performed directly on site, which helps to speed up the construction progress. No holes are required in the webs of the H-shaped steel, which will not affect the load-bearing performance of the PEC beam. The embedded plate structure designed in this utility model is pre-connected to the H-shaped steel frame inside the PEC beam in the factory through welding, and the embedded plates will not block the concrete pouring during the PEC beam prefabrication process. Utilizing the PEC beam structure designed in this utility model, in conjunction with steel connectors and galvanized supporting steel plates, the PEC beam and glass curtain wall can be quickly assembled, reducing on-site construction steps and speeding up the construction progress. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a cross-sectional view of the connection structure between the PEC beam and the curtain wall in the embodiment;

[0017] Figure 2 for Figure 1 Enlarged view of point B in the middle;

[0018] Figure 3 for Figure 1 Enlarged view of point C in the middle;

[0019] Figure 4 for Figure 1 Middle AA section;

[0020] Figure 5 This is a schematic diagram of the connection structure between the H-shaped steel frame and the embedded plate inside the PEC beam;

[0021] Figure 6 for Figure 5 Schematic diagram of the structure after precast concrete pouring is completed.

[0022] Reference numerals:

[0023] 1. PEC 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 connector; 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 layer; 72. Upper supporting steel plate between the second layer; 73. Lower supporting steel plate between layers; 8. Fireproof cotton; 9. Fireproof sealant. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0025] This embodiment mainly discloses a connection structure between a PEC beam and a curtain wall, such as Figures 1 to 6 As shown, it mainly includes PEC beam 1, building structure main body 2, glass curtain wall 6, curtain wall beam, curtain wall column 63, steel connector 4 and galvanized supporting steel plate 7 with bending structure. Figure 5 and Figure 6 The figure shows a precast steel-concrete composite beam, whose internal framework is formed by H-shaped steel and embedded plates 3. 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 plates 3 serve as embedded components for curtain wall connections. In this embodiment, the embedded plates 3 are composed of vertical plates 31 and horizontal plates 32, forming an L-shaped structure in vertical cross-section. After the prefabrication of the H-shaped steel is completed in the factory, the embedded plate 3 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 spaced between the vertical plate 31 and the web 13 so as not to affect the pouring and vibrating 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 near 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 PEC 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.

[0026] After the PEC beam 1 is prefabricated in the factory, it is transported to the construction site, where the installation of the PEC beam 1 and the glass curtain wall 6 are completed. Figure 1 As shown, the glass curtain wall 6 includes curtain wall columns 63, upper interlayer curtain wall beams 61, and lower interlayer curtain wall beams 62. The glass curtain wall 6 can be installed with the curtain wall columns 63 and curtain wall beams according to existing techniques. A floor slab is installed on top of the PEC beam 1, and the top edge of the floor slab is constructed to form the main flange 2 of the building structure. In this embodiment, steel connectors 4 are used to connect the PEC beam 1 and the curtain wall columns 63. The steel connectors 4 are arranged horizontally, with one end welded to the exposed vertical plate 31 of the PEC beam 1 and the other end fixed to the curtain wall columns 63 with bolts.

[0027] The galvanized supporting steel plates 7 in this embodiment can be divided into upper interlayer supporting steel plates and lower interlayer supporting steel plates 73 according to their installation positions between layers. The upper interlayer supporting steel plates are mainly used to connect the main building structure 2 with the curtain wall, while the lower interlayer supporting steel plates 73 are mainly used to connect the lower half of the PEC beam 1 with the curtain wall. Since the embedded plate 3 is located in the upper half of the PEC beam 1, the upper half of the PEC beam 1 is connected to the curtain wall column 63 through the above-mentioned steel connector 4, while the lower half of the PEC beam 1 is connected to the lower interlayer curtain wall cross beam 62 through the lower interlayer supporting steel plates 73. Figure 3 As shown, the interlayer lower supporting steel plate 73 has a bent structure, with the bend located at one end near the PEC beam 1. The right-angle bend is formed by bending. One end of the interlayer lower supporting steel plate 73 is fixed to the bottom of the lower flange 12 of the PEC 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 with screws or rivets 5. In order to improve the fire protection 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 PEC beam 1 is bent to form a raised hem, and fireproof sealant 9 is provided on the hem.

[0028] like Figure 2 As shown, the interlayer upper supporting steel plates in this embodiment are divided into a first interlayer upper supporting steel plate 71 and a second interlayer upper supporting steel plate 72. The interlayer upper supporting steel plates also have a bent structure. Among them, the first interlayer upper supporting steel plate 71 has a right-angled bend structure at one end near the curtain wall column 63. The second interlayer upper supporting steel plate 72 has multiple bends in different directions, namely: Figure 2 The direction shown is for reference only. One end of the second-story upper support steel plate 72 is placed on top of the main building structure flange 2. One end of the first-story upper support steel plate 71 presses against one end of the second-story upper support steel plate 72. The first-story upper support steel plate 71 and the second-story upper support steel plate 72 are then secured to the top of the main building structure flange 2 using screws or rivets 5. The second-story upper support steel plate 72 is bent downward at a right angle along the outer wall of the main building structure flange 2 (the first bend), and then bent again parallel to the curtain wall beam (the second bend) to form an intermediate section. This intermediate section is then bent upward at the sides and secured to the curtain wall column 63 using screws or rivets. The bent portion of the first-story upper support steel plate 71 is secured to the side end surface of the upper curtain wall beam 61 between floors using screws or rivets 5. Also for better fire prevention effect, fireproof cotton 8 is bonded to the top of the middle section of the upper supporting steel plate 72 of the second layer, so that the two ends of the upper supporting steel plate 71 of the first layer form raised folded edges, and fireproof sealant 9 is set at the folded edges at both ends.

[0029] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A PEC beam, characterized in that: It includes H-shaped steel, embedded plates and concrete. The embedded plates include vertical plates and horizontal plates. The horizontal plates are perpendicular to the web of the H-shaped steel, and the vertical plates are parallel to the web. One end of the horizontal plate is fixed on one side of the web of the H-shaped steel. The vertical plate and the horizontal plate are arranged on the same side of the web. The bottom end of the vertical plate is fixed on the horizontal plate, and the top end of the vertical plate is fixedly connected 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 concrete on the side where the embedded plate is located does not cover the vertical plate.

2. A connection structure between a PEC beam and a curtain wall, characterized by: It includes the PEC beam as described in claim 1 and a main flange of a building structure, a glass curtain wall, a curtain wall beam, a curtain wall column, a steel connector, and a galvanized supporting steel plate with a bending structure. The main flange of the building structure is located at the top of the PEC beam. The galvanized supporting steel plate is divided into an upper interlayer supporting steel plate and a lower interlayer supporting steel plate. The curtain wall beam is divided into an upper interlayer curtain wall beam and a lower interlayer curtain wall beam. The curtain wall column is fixedly connected to the exposed vertical plate of the PEC beam by a steel connector. One end of the upper interlayer supporting steel plate is fixed to the main flange of the building structure, and the other end is fixed to the upper interlayer curtain wall beam. One end of the lower interlayer supporting steel plate is fixed to the lower flange of the PEC beam, and the other end is fixedly connected to the lower interlayer curtain wall beam.

3. The connection structure between a PEC beam and a curtain wall according to claim 2, characterized in that: The steel connector is perpendicular to the vertical plate, one end of the steel connector is welded to the vertical plate, and the other end of the steel connector is fixed to the curtain wall column by bolts.

4. The connection structure between a PEC beam and a curtain wall according to claim 2, characterized in that: The lower interlayer supporting steel plate forms a bent structure near one end of the PEC beam, one end of the lower interlayer supporting steel plate is fixed to the bottom of the lower flange of the PEC beam 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.

5. The connection structure between a PEC beam and a curtain wall according to claim 4, characterized in that: The end portion of the interlayer lower supporting steel plate fixed on the PEC beam forms a raised hem, and a fireproof sealant is provided at the hem.

6. The connection structure between a PEC beam and a curtain wall according to claim 2, characterized in that: Fireproof cotton is arranged on the top of the lower supporting steel plate between the layers.

7. The connection structure between a PEC beam and a curtain wall according to claim 2, 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 bending structure at one end close to the curtain wall column; the second interlayer upper supporting steel plate has a bending structure in different directions, 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 to the top of the flange of the main body of the building structure by screws or rivets, and the other end of the first interlayer upper supporting steel plate is fixed to the side end surface of the interlayer upper curtain wall beam by screws or rivets; the second interlayer upper supporting steel plate is respectively fitted with the top surface and side surface of the flange of the main body of the building structure through the first bending, and a middle section perpendicular to the curtain wall column is formed through the second bending. After the middle section is bent upward through the side, it is fixed to the curtain wall column by screws or rivets.

8. The connection structure between a PEC beam and a curtain wall according to claim 7, characterized in that: Both ends of the upper supporting steel plate of the first interlayer are respectively formed with raised folded edges, and fireproof sealant is provided at the folded edges.

9. The connection structure between a PEC beam and a curtain wall according to claim 7, characterized in that: Fireproof cotton is arranged on the top of the middle section of the upper supporting steel plate of the second layer.

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