Scrimber-steel box composite beam

Abstract

The utility model relates to the technical field of building composite structure connecting pieces, in particular to a scrimber-steel box composite beam. The scrimber-steel box composite beam comprises scrimber, a steel box beam and a wrapping part, a cylindrical steel pin is arranged on the upper surface of the steel box girder, and the steel box girder is connected with the steel pin in a welded mode. A cylindrical hole is formed in the lower surface of the scrimber, and the steel pin is arranged in the cylindrical hole; and wrapping parts wrap the peripheries of the scrimber and the steel box girder. According to the technical scheme, the steel pins of the steel box girder are arranged in the cylindrical holes of the scrimber, so that the steel box girder is positioned in a tension area and reaches a yield state under the action of bending moment of the scrimber-steel box composite girder; the scrimber is located in a pressed area, and the compression resistance of the scrimber is fully exerted. The shear key is formed through mutual clamping of the steel pins and the cylindrical holes, and then the bearing capacity and ductility performance of the scrimber-steel box composite beam are enhanced through the wrapping part wrapping the peripheries of the scrimber and the steel box beam.

Description

Technical Field

[0001] The utility model relates to the technical field of building composite structure connectors, in particular to a recombined wood-steel box composite beam. Background Art

[0002] Reconstructed wood made of fast-growing wood can significantly reduce the construction cost of modern wood structures and has outstanding economic benefits. Reconstructed wood has excellent compressive strength along the grain, but reconstructed wood beams are prone to brittle failure mode of wood fracture in the tensile zone under load, which cannot fully exert the compressive properties of reconstructed wood, and its brittle failure mode limits the application of reconstructed wood products in building structures.

[0003] The existing reinforcement methods for wooden beams mainly include pasting composite reinforcement materials or metal plates on the tensile bottom of the wooden beams, or embedding threaded steel bars and FRP bars, etc. This reinforcement method can improve the bearing capacity and ductility of wooden beams to a certain extent, but given the special resistance characteristics of reconstructed wood, this reinforcement method is difficult to fundamentally change the brittle failure characteristics of reconstructed wood beams, and the improvement of their ultimate displacement and ductility is relatively limited. Utility Model Content

[0004] The utility model aims to provide a reconstituted wood-steel box composite beam, which is convenient to construct, simple in structure, and suitable for engineering promotion. It realizes the application of reconstituted wood products in building structures and has environmental and economic benefits.

[0005] The utility model provides a reconstituted wood-steel box composite beam, comprising: reconstituted wood, a steel box beam and a wrapping part;

[0006] The upper surface of the steel box beam is provided with a cylindrical steel pin, and the steel box beam is connected to the steel pin by welding;

[0007] The lower surface of the reconstituted wood is provided with a cylindrical hole, and the steel pin is placed in the cylindrical hole;

[0008] The reconstituted wood and the steel box beam are wrapped with a wrapping portion around their peripheries.

[0009] Preferably, the steel box girder comprises an upper flange plate, a lower flange plate and steel plates on both sides;

[0010] The upper flange plate is arranged in parallel with the lower flange plate;

[0011] The steel plate connects the upper flange plate and the lower flange plate.

[0012] Preferably, the steel pins are arranged on the upper surface of the steel box girder.

[0013] Further preferably, the diameter of the steel pin is 6-12 mm, and the diameter of the cylindrical hole is 2-3 mm larger than the diameter of the steel pin.

[0014] Further preferably, the depth of the cylindrical hole is 20-40 mm.

[0015] Preferably, the wrapping portion is made of composite reinforced material FRP cloth.

[0016] Preferably, a transverse plate is welded near the bottom of the steel box girder.

[0017] Preferably, adjacent wrapping portions are arranged at a certain interval.

[0018] Preferably, the contact interface between the reconstituted wood and the steel box girder is provided with epoxy resin adhesive.

[0019] Preferably, the steel pin is placed in the cylindrical hole and is bonded and fixed using epoxy resin adhesive.

[0020] Beneficial effects:

[0021] The technical solution of the utility model can ensure that the steel box beam of the reconstructed wood-steel box composite beam is located in the tension zone and reaches the yield state under the action of bending moment by placing the steel pin of the steel box beam in the cylindrical hole of the reconstructed wood; the reconstructed wood is located in the compression zone, giving full play to the compression resistance of the reconstructed wood. The shear key is formed by the mutual engagement of the steel pin and the cylindrical hole, and the reconstructed wood and the steel box beam are further reinforced by wrapping the wrapping part around them, thereby enhancing the bearing capacity and ductility of the reconstructed wood-steel box composite beam. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is a schematic diagram of the structure of the reconstituted wood in the utility model;

[0024] Figure 2 It is a structural schematic diagram of the steel box girder in the utility model;

[0025] Figure 3 It is a schematic diagram of the overall structure of the utility model.

[0026] Description of reference numerals:

[0027] 1: reconstituted wood; 101: cylindrical hole; 2: steel box beam; 201: steel pin; 202: cross plate; 3: composite reinforcement material FRP cloth. DETAILED DESCRIPTION

[0028] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0030] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, "multiple" means two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0031] like Figures 1 to 3 As shown, the utility model provides a reconstituted wood-steel box composite beam, which includes a reconstituted wood 1, a steel box beam 2 and a wrapping part. Specifically, in this embodiment, the wrapping part is a composite reinforcement material FRP cloth 3. A cylindrical steel pin 201 is provided on the upper surface of the steel box beam 2, and the steel box beam 2 is connected to the steel pin 201 by welding. A cylindrical hole 101 is provided on the lower surface of the reconstituted wood 1, and the steel pin 201 is placed in the cylindrical hole 101. The reconstituted wood 1 and the steel box beam 2 are wrapped with a composite reinforcement material FRP cloth 3.

[0032] The technical solution of the utility model can ensure that the steel box beam 2 is located in the tension zone and reaches the yield state under the action of bending moment, and the reconstructed wood 1 is located in the compression zone, so as to give full play to the compression resistance of the reconstructed wood 1 by placing the steel pin 201 of the steel box beam 2 in the cylindrical hole 101 of the reconstructed wood 1. The shear key is formed by the mutual engagement of the steel pin 201 and the cylindrical hole 101, and the composite reinforcement material FRP cloth 3 is further reinforced by wrapping the periphery of the reconstructed wood 1 and the steel box beam 2, thereby enhancing the bearing capacity and ductility of the reconstructed wood 1-steel box composite beam.

[0033] The steel box girder 2 is made of a rectangular steel pipe, and includes an upper flange plate, a lower flange plate and steel plates on both sides. The upper flange plate is arranged in parallel with the lower flange plate, and the steel plate connects the upper flange plate and the lower flange plate.

[0034] like Figure 2 As shown, a transverse plate 202 can be welded near the tension bottom of the steel box girder 2 to enhance the bending bearing capacity of the steel box girder 2 and prevent the lateral steel plate from buckling.

[0035] like Figure 2 As shown, the steel pins 201 are longitudinally arranged in two rows on the upper surface of the steel box girder 2.

[0036] The diameter of the steel pin 201 is 6-12 mm. The diameter of the cylindrical hole 101 is 2-3 mm larger than the diameter of the steel pin 201. The depth of the cylindrical hole 101 is 20-40 mm. The steel pin 201 is placed in the cylindrical hole 101 and fixed with epoxy resin adhesive. By setting the shear key, the sudden damage caused by the failure of the adhesive layer on the contact interface between the reconstructed wood 1 and the steel box beam 2 is avoided.

[0037] The contact interface between the reconstituted wood 1 and the steel box beam 2 is provided with epoxy resin adhesive, so that the overall structure of the reconstituted wood 1 and the steel box beam 2 is more solid, and the overall performance of the reconstituted wood-steel box composite beam is enhanced.

[0038] like Figure 3 As shown, the composite reinforcement material FRP cloth 3 is arranged at a certain interval along the longitudinal direction, so as to further improve the overall performance of the reconstituted wood-steel box composite beam.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A reconstituted wood-steel box composite beam, characterized in that: include: Restructured wood and steel box beams and wrapping sections; The upper surface of the steel box beam is provided with a cylindrical steel pin, and the steel box beam is connected to the steel pin by welding; The lower surface of the reconstituted wood is provided with a cylindrical hole, and the steel pin is placed in the cylindrical hole; The reconstituted wood and the steel box beam are wrapped with a wrapping portion around their peripheries.

2. The reconstituted wood-steel box composite beam according to claim 1, characterized in that: The steel box girder comprises an upper flange plate, a lower flange plate and steel plates on both sides; The upper flange plate is arranged in parallel with the lower flange plate; The steel plate connects the upper flange plate and the lower flange plate.

3. The reconstituted wood-steel box composite beam according to claim 1, characterized in that: The steel pins are arranged on the upper surface of the steel box girder.

4. The reconstituted wood-steel box composite beam according to claim 3, characterized in that: The diameter of the steel pin is 6-12 mm, and the diameter of the cylindrical hole is 2-3 mm larger than the diameter of the steel pin.

5. The reconstituted wood-steel box composite beam according to claim 4, characterized in that: The depth of the cylindrical hole is 20-40 mm.

6. The reconstituted wood-steel box composite beam according to claim 1, characterized in that: The material of the wrapping part is composite reinforced material FRP cloth.

7. The reconstituted wood-steel box composite beam according to claim 1, characterized in that: The steel box girder is welded with a transverse plate near the bottom.

8. The reconstituted wood-steel box composite beam according to claim 1, characterized in that: Adjacent wrapping parts are arranged at a certain interval.

9. The reconstituted wood-steel box composite beam according to claim 1, characterized in that: The contact interface between the reconstituted wood and the steel box beam is provided with epoxy resin adhesive.

10. The reconstituted wood-steel box composite beam according to claim 1, characterized in that: The steel pin is placed in the cylindrical hole and is bonded and fixed by using epoxy resin adhesive.

Images