External steel plate concrete beam

Abstract

The invention discloses an external steel plate concrete beam which comprises a steel plate and a stirrup, and the lower portion of the stirrup is connected with the steel plate. Or the lower parts of the stirrups are connected with supporting legs arranged on the steel plates, and concrete is poured after the components are connected, so that a prefabricated concrete beam body is formed; the supporting legs are arranged in one or more rows in the width direction of the beam body, and the thickness of the steel plate ranges from 3 mm to 30 mm. Supporting legs arranged on the steel plate extend into the concrete, and the supporting legs and the steel plate can be connected in a welding mode or a buckling mode or a clamp mode or an insertion mode or a sleeve mode or can be integrally formed in a hot rolling mode; when the prefabricated concrete beam body serves as a secondary beam to be connected with the steel main beam, the end of the steel plate is provided with a steel plate joint connecting plate to be connected with the steel main beam. When the prefabricated concrete beam body serves as a secondary beam to be connected with the concrete main beam, the end of the steel plate is provided with a steel plate joint connecting plate and an anchor bar component to be connected with the concrete main beam. And the applicability, the universality and the uniformity are higher.

Description

Technical Field

[0001] This invention relates to a concrete beam, and more particularly to an external steel plate concrete beam, belonging to the field of building technology. Background Technology

[0002] Traditional concrete beams have reinforcing bars at the bottom, which require a concrete cover. This reduces the lever arm of the reinforcing bars, increasing the amount of steel used. Furthermore, the reinforcing bars at the bottom of the beam need to be manually tied, which is labor-intensive and results in a long construction period. Summary of the Invention

[0003] The purpose of this invention is to provide an external steel plate concrete beam that has greater applicability, versatility and uniformity.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is an external steel plate concrete beam, which includes a steel plate and stirrups, with the lower part of the stirrups connected to the steel plate; or the lower part of the stirrups connected to the supports provided on the steel plate. After the above components are connected, concrete is poured to form a precast concrete beam. The supports are arranged in one or more rows along the width direction of the beam, and the thickness of the steel plate is 3mm-30mm. The supports provided on the steel plate extend into the concrete, and the supports and the steel plate can be connected by welding, snap-fit, clamp, insertion, or sleeve, or the supports and the steel plate can be integrally hot-rolled. When the precast concrete beam is connected to the main steel beam as a secondary beam, a steel plate node connection plate is provided at the end of the steel plate to connect with the main steel beam. When the precast concrete beam is connected to the main concrete beam as a secondary beam, a steel plate node connection plate and anchor bar components are provided at the end of the steel plate to connect with the main concrete beam.

[0005] The beneficial effects of this invention are: (1) Compared with traditional reinforced concrete beams, the beam of the present invention has an external steel plate arranged at the bottom, which has greater stiffness, stronger deformation capacity, better mechanical properties, and is more suitable for designing as a supportless beam with a larger span; and the steel plate has fewer models than the steel bar, making it more versatile. It replaces the bottom steel bar of the beam and also eliminates the work of tying the bottom steel bar of the beam, reducing labor intensity and speeding up the production cycle.

[0006] (2) This technical solution has stronger applicability, versatility and uniformity, and can be built in batches in the factory in advance without worrying about the large inventory problem.

[0007] (3) The external steel plate at the bottom of the beam replaces the reinforcing steel bars at the bottom of the traditional concrete beam. The traditional reinforcing steel bars need to be covered with a concrete cover, which reduces the lever arm of the steel bars and increases the amount of steel used. However, the bottom surface of the steel plate in this invention is exposed and does not need to be covered with a concrete cover. The steel plate is located at the farthest point of the bottom of the beam, which can maximize the lever arm effect of the steel and reduce the amount of reinforcement.

[0008] (4) The support legs are set along the entire length of the steel plate. The advantage is that the stirrups can be quickly and easily welded to the long support legs.

[0009] (5) Another benefit of external steel plates is that the steel plates are poured together with concrete in the factory to reach the required strength and then transported to the construction site. Attached Figure Description

[0010] To more clearly illustrate the technical solution of the present invention, the accompanying drawings used in the description of the embodiments or prior art will be briefly introduced below.

[0011] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the structure of the present invention; Figure 3 This is a schematic diagram of the structure of the present invention; Figure 4 This is a schematic diagram of the structure of the present invention; Figure 5 This is a schematic diagram of the structure of the present invention; Figure 6 This is a schematic diagram of the structure of the present invention; Figure 7 This is a schematic diagram of the structure of the present invention; Figure 8 This is a schematic diagram of the structure of the present invention; Figure 9 This is a schematic diagram of the structure of the present invention; Figure 10 This is a schematic diagram of the precast concrete beams and floor slabs of the present invention; Figure 11 This is a partial structural diagram of the connection between the precast concrete beam and the steel main beam of the present invention; Figure 12 This is a schematic diagram of the connection between the precast concrete beam and the steel main beam of the present invention; Figure 13 for Figure 12 The main view; Figure 14 This is a schematic diagram of another structure for connecting the precast concrete beam to the steel main beam according to the present invention; Figure 15 This is a partial schematic diagram of another structure for the connection between the present invention and the steel main beam; Figure 16 This is a schematic diagram of another structure for the connection of the present invention with the steel main beam; Figure 17 This is a partial structural schematic diagram of the present invention and the concrete main beam; Figure 18 This is a partial schematic diagram of another structure of the present invention and the concrete main beam; Figure 19 A partial schematic diagram of another structure of the present invention and a concrete main beam; Figure 20 This is a partial schematic diagram of another structure of the present invention and the concrete main beam; Figure 21 This is a partial schematic diagram of another structure of the present invention and the concrete main beam; Figure 22 This is a schematic diagram of another connection structure between the support leg and the steel plate of the present invention; Figure 23 for Figure 22 Side view; Figure 24 This is a schematic diagram of another connection structure between the support leg and the steel plate of the present invention; Figure 25 This is a schematic diagram of another connection structure between the support leg and the steel plate of the present invention. Detailed Implementation

[0012] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in this application will be clearly and completely described below in conjunction with embodiments.

[0013] This invention discloses an external steel plate concrete beam, which includes a steel plate 1 and stirrups 2, wherein the lower part of the stirrups 2 is connected to the steel plate 1, as shown below. Figure 1 As shown; or the lower part of the stirrup 2 is connected to the support leg 3 provided on the steel plate 1, such as Figures 2-8 As shown, after the above components are connected, concrete 4 is poured to form a precast concrete beam; the support legs are set in one or more rows along the width of the beam, and the steel plate thickness is 3mm-30mm.

[0014] The support legs 3 provided on the steel plate 1 extend into the concrete 4. The support legs and the steel plate can be connected by welding, snap-fit, clamp, insertion, or sleeve, or the support legs and the steel plate can be integrally hot-rolled. Figures 4-7 As shown, the support leg and the steel plate are integrally hot-rolled; other examples will not be repeated. The height of the support leg 3 extending into the concrete 4 is no more than 1 / 4 of the beam height.

[0015] The support legs 3 are arranged along the length or width of the steel plate or in segments; the projection of the support legs on the steel plate is in the form of strips, spaced strips, or discrete dots.

[0016] like Figure 9 As shown, holes 5 can be provided at intervals on the support leg 3 as through holes for reinforcing bars or as joint holes with concrete.

[0017] like Figures 1-9As shown, the stirrups 2 are arranged in parallel at intervals along the length direction of the beam. The stirrups 2 are in the shape of a "U" with an upward or downward opening, or a closed "square" shape, or "straight bar" or "L" shapes symmetrically arranged along both sides of the beam. The horizontal bending section at the lower part of the stirrup is welded to the upper surface of the steel plate, or the vertical section at the lower part of the stirrup is welded to the side surface of the steel plate support leg, or the horizontal bending section at the lower part of the stirrup is connected through the reinforcement hole on the steel plate support leg by passing through the hole.

[0018] As Figures 1-4 , Figure 7 , Figure 9 shown, the concrete covers the upper surface of the steel plate 1 at the bottom and the bottom of the steel plate is exposed, or as Figure 5 , Figure 6 , Figure 8 shown, the concrete covers the upper surface and the side surface of the steel plate 1, and the bottom surface of the steel plate is exposed.

[0019] As Figure 9 shown, the precast concrete beam body further includes a plurality of longitudinal reinforcements 6 and / or waist reinforcements 7. The plurality of longitudinal reinforcements and / or waist reinforcements and the plurality of stirrups together form a space steel bar framework.

[0020] As Figure 10 shown, a floor slab 8 is further provided on the precast concrete beam body. The floor slab is a wooden board, a steel bar truss floor formwork or a composite slab, and the floor slab is cast-in-place or precast.

[0021] As Figure 1 , Figure 3 , Figure 7 and Figure 8 shown, the stirrups 2 are buried in the precast concrete beam body to form closed stirrups, or as Figure 10 shown, its upper part extends out of the precast concrete beam body and is buried in the floor slab 8.

[0022] This concrete beam further includes beams, walls and columns that support the external steel plate concrete beam. Embodiment 1

[0023] As Figures 11-16 shown, when the precast concrete beam body is used as a secondary beam to connect with the steel main beam 9, a steel plate node connecting plate 10 is arranged at the middle position of the end of the steel plate 1. In this embodiment, the steel plate node connecting plate 10 is preferably in the shape of a right trapezoid, and its hypotenuse extends downward and is welded to the steel plate 1 to ensure reliable force transmission. Bolt holes 11 and reinforcement holes 12 for the tie bars 13 to pass through are arranged on the steel plate node connecting plate 10. The arrangement of the reinforcement holes facilitates the passing through of the stirrups 2 and the tie bars 13. The precast concrete beam body and the steel main beam are fixedly connected by bolts 14.

[0024] A steel main beam node connection plate 15 is provided on the steel main beam 9. The steel main beam node connection plate 15 is a rectangular connection plate or an L-shaped connection plate located on one side of the web of the steel main beam. The steel main beam node connection plate and the steel plate node connection plate are fixedly connected, that is, they can be welded or bolted. In this embodiment, the bolted connection method is preferred for the scheme demonstration, such as... Figure 11 As shown, the connecting plate is provided with bolt holes corresponding to the bolt holes on the steel plate node connecting plate 10. The steel main beam node connecting plate 15 and the steel plate node connecting plate 10 are fixedly connected by bolts. Furthermore, studs 16 can be provided on the steel plate node connecting plate 10 as needed according to calculations. The studs 16 can strengthen the combined effect between the steel plate 1 and the concrete 4. A stiffening plate 17 is provided on the other side of the web of the steel main beam 9.

[0025] like Figures 15-16 As shown, the steel plate node connecting plate 10 can also be fixed to the web of the steel main beam by an end plate 18. The end plate is provided with bolt holes corresponding to the web, and the end plate is fixed to the web by bolts 14. Example 2

[0026] like Figures 17-19 As shown, when the precast concrete beam is connected to the main concrete beam 19 as a secondary beam, in this embodiment, the main concrete beam 19 can be a precast concrete beam or a cast-in-place concrete beam. The precast concrete beam is connected to the main concrete beam 19 through the steel plate node connection plate 10 and the anchor bar component; or the ends of the longitudinal reinforcement 6 of the secondary beam and / or the ends of the steel plate 1 extend into the main concrete beam 19, and the anchor bar and anchor plate are embedded in the main concrete beam.

[0027] like Figure 17 and Figure 19 As shown, the anchor bar component includes an anchor plate 20, an anchor bar 21, and an anchor plate connecting plate 22. The anchor plate 20 is parallel to the surface of the concrete main beam. When the anchor plate is only installed on the secondary beam connection side, one side of the anchor bar 21 is connected to the anchor plate 20, and the other side is provided with anchoring facilities such as hooks. The anchor plate connecting plate 22 is connected to the steel plate node connecting plate 10 by bolts 14. Figure 18 As shown, when the anchor plate 20 is set on both sides of the concrete main beam, the two anchor plates 20 are connected together by the anchor bar 21. In this embodiment, the anchor plate connecting plate 22 is a rectangular plate.

[0028] like Figure 20 As shown, the anchor bar component can also be directly welded to the steel plate node connection plate 10. In this case, the anchor plate 20 can be directly welded to the steel plate node connection plate 10, eliminating the need for bolts, bolt holes, and other components.

[0029] like Figure 21As shown, when the ends of the longitudinal reinforcement 6 of the secondary beam extend into the concrete main beam 19, the ends of the longitudinal reinforcement of the secondary beam are bent; in this embodiment, if there are multiple rows of longitudinal reinforcement, the ends of the top and bottom longitudinal reinforcements of the secondary beam are bent, and the bent parts are staggered towards each other; the concrete main beam is provided with main beam stirrups 24, and the main beam longitudinal reinforcement 23 is welded on the main beam stirrups 24. Example 3

[0030] like Figures 22-23 As shown, another connection method between the support leg 3 and the steel plate 1 is a snap-fit ​​connection. The steel plate 1 has a groove 101 along its length in the middle. The support leg 3 is fixedly connected to the support leg fixing seat 301. The support leg fixing seat 301 includes a boss 3011 and a base 3012, which are integrally formed. When installing the support leg, rotate it in the direction of the arrow in the figure to install it in place. The advantage of the snap-fit ​​connection is that it allows for convenient and flexible replacement of support legs with different parameters to meet construction requirements. Example 4

[0031] like Figure 24 As shown, the support leg 3 can also be configured as a T-shape, with corresponding mounting holes on the steel plate 1. During actual installation, the support leg 3 is directly inserted into the steel plate 1. Figure 25 As shown, the support leg 3 and the steel plate 1 can also be connected by a sleeve, that is, a screw 302 is provided at the end of the support leg 3, and a sleeve 102 is provided on the steel plate 1 accordingly. During installation, the support leg 3 is directly rotated and screwed into the sleeve 102.

[0032] Examples 3 and 4 mainly illustrate the connection methods between the support legs and the steel plate. Other similar variations should be considered as variations based on this application.

[0033] It should be noted that, as an extension, the bottom steel plate of the beam can also be replaced by any small steel section, such as one or more combinations and deformations of H-beams, channel steel, cross-shaped steel, T-beams, inverted T-beams, angle steel, box-shaped steel, round steel pipes, square steel pipes, polygonal steel pipes, etc.

[0034] This patent describes an external steel plate concrete beam that includes a floor slab forming a support-free system.

[0035] The described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

Claims

1. An external steel plate concrete beam, characterized in that: The external steel plate concrete beam includes a steel plate and stirrups, and the lower part of the stirrups is connected to the steel plate; or the lower part of the stirrups is connected to the support feet arranged on the steel plate. After the above components are connected, concrete is poured to form a precast concrete beam body; the support feet are arranged in one row or more than one row along the width direction of the beam body, and the thickness of the steel plate is 3 mm - 30 mm; The support feet arranged on the steel plate extend into the concrete, and the support feet and the steel plate can be connected by welding, snap connection, clamp connection, insertion connection or sleeve connection, or the support feet and the steel plate are integrally hot-rolled; When the precast concrete beam body is used as a secondary beam to be connected to a steel main beam, a steel plate node connecting plate is arranged at the end of the steel plate to be connected to the steel main beam; When the precast concrete beam body is used as a secondary beam to be connected to a concrete main beam, a steel plate node connecting plate and an anchor bar component are arranged at the end of the steel plate to be connected to the concrete main beam.

2. The external steel plate concrete beam according to claim 1, characterized in that: The steel plate node connecting plate is in a right trapezoidal structure or a rectangular structure; when it is in a direct trapezoidal structure, its hypotenuse extends downward and is welded to the steel plate to ensure reliable force transmission.

3. The external steel plate concrete beam according to claim 1, characterized in that: The height that the support feet extend into the concrete is not greater than 1 / 4 of the beam height.

4. The external steel plate concrete beam according to claim 1, characterized in that: The support feet are arranged continuously or in segments along the length direction or width direction of the steel plate; the projection of the support feet on the steel plate is strip-shaped, spaced strip-shaped or discrete dot-shaped.

5. The external steel plate concrete beam according to claim 1, characterized in that: Holes can be arranged at intervals on the support feet as bar passing holes or as bonding holes with the concrete.

6. The external steel plate concrete beam according to claim 1, characterized in that: The stirrups are arranged parallel and at intervals along the length direction of the beam. The stirrups are in a "U" shape with an upward or downward opening, or a closed "mouth" shape, or "straight bar" or "L" shape symmetrically arranged along both sides of the beam; the horizontal bent section at the lower part of the stirrups is welded to the upper surface of the steel plate, or the vertical section at the lower part of the stirrups is welded to the side surface of the support feet of the steel plate, or the horizontal bent section at the lower part of the stirrups is connected by passing through the bar passing holes on the support feet of the steel plate.

7. The external steel plate concrete beam according to claim 1, characterized in that: The concrete covers the upper surface of the bottom steel plate or covers the upper surface and side surfaces of the bottom steel plate, and the bottom surface of the steel plate is exposed.

8. The external steel plate concrete beam according to claim 1, characterized in that: The precast concrete beam body also contains multiple longitudinal bars and / or waist bars, and the multiple longitudinal bars and / or waist bars and multiple stirrups jointly form a space steel bar skeleton.

9. The external steel plate concrete beam according to claim 1, characterized in that: A floor slab is also arranged on the precast concrete beam body. The floor slab is a wooden board, a steel bar truss floor slab or a composite slab, and the floor slab is cast-in-place or precast.

10. The external steel plate concrete beam according to claim 1, characterized in that: The stirrups are buried in the precast concrete beam body to form closed stirrups, or their upper parts extend outside the precast concrete beam body.

11. The external steel plate concrete beam according to claim 1, characterized in that: It also includes beams, walls and columns that support the external steel plate concrete beam.

12. The external steel plate concrete beam according to claim 2, characterized in that, A steel main beam node connecting plate is arranged on the steel main beam. The steel main beam node connecting plate is a rectangular connecting plate or an L-shaped connecting plate arranged on one side of the web of the steel main beam, and the steel main beam node connecting plate and the steel plate node connecting plate are fixedly connected.

13. The external steel plate concrete beam according to claim 11, characterized in that, The steel plate node connecting plate is fixed on the web of the steel main beam through an end plate. Bolt holes corresponding to the web are arranged on the end plate, and the end plate is fixed on the web by bolts.

14. The external steel plate concrete beam according to claim 2, characterized in that, The anchor bar component includes an anchor plate, an anchor bar, and an anchor plate connecting plate. When the anchor plate is only installed on the secondary beam connection side, one side of the anchor bar is connected to the anchor plate, and the other side is provided with anchoring facilities such as hooks. The anchor plate connecting plate is fixedly connected to the steel plate node connecting plate. When the anchor plate is installed on both sides of the concrete main beam, the two anchor plates are connected together by the anchor bar. The anchor plate and the anchor bar are embedded in the concrete main beam.

15. An external steel plate concrete beam according to claim 1, characterized in that, When the top of a concrete beam is connected to the floor slab, a post-anchoring method can be used. Post-anchoring methods include: rebar installation, bolts, or studs.

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