CN112832457B - Built-in vertical steel plate reinforced recombined bamboo beam and preparation method thereof - Google Patents

Abstract

The invention relates to a built-in vertical steel plate reinforced recombined bamboo beam and a preparation method thereof, the built-in vertical steel plate is used in the recombined bamboo beam processing engineering, the beam is directly glued and hot pressed, and grooving and secondary processing are not needed, so that the integrity of the beam can be ensured. The steel plates are vertically placed, so that the rigidity of the beam can be effectively improved, and the problem that the recombined bamboo beam is too large in deflection deformation when being used as a flexural member is solved. The through holes are uniformly arranged in the steel plate, but do not need to be arranged at a place close to the upper edge and the lower edge of the steel plate, so that the operation is convenient, meanwhile, the bonding effect between the steel plate and the recombined bamboo can be enhanced by the steel plate open holes, the purpose of saving steel is achieved on the premise of little influence on rigidity, and the economic benefit is improved. The vertical steel plates are placed in the recombined bamboo beams to improve the rigidity of the recombined bamboo beams, the reinforcing mode is convenient and effective, meanwhile, corrosion of the steel plates can be avoided, and the safety and durability of the components are enhanced.

Description

A kind of built-in vertical steel plate reinforced reconstructed bamboo beam and preparation method thereof

Technical Field

The invention relates to the technical field of bamboo and wood in civil engineering, and more particularly to a reconstructed bamboo beam reinforced with a built-in vertical steel plate and a preparation method thereof.

Background Art

Compared with wood, bamboo has the advantages of being green, natural, strong, tough, and having a short growth cycle. It is praised by structural engineers as "plant steel bars". In recent years, various structural engineering bamboo products have emerged, such as reconstructed bamboo and glued bamboo. Reconstructed bamboo is a new bamboo material that is reorganized and reinforced. That is, the bamboo is processed into long strips of bamboo strips, bamboo fibers, or crushed into bamboo fiber bundles, which are then dried and impregnated with glue, and then dried to the required moisture content. Then, they are laid in a mold and cured at high temperature and high pressure to form a profile. Compared with natural bamboo, reconstructed bamboo has the advantages of being green and environmentally friendly, having a high material utilization rate, high strength, few defects, and can be processed into various shapes. It is easy to apply in engineering and has a very bright future in the fields of civil engineering.

In the existing reconstructed bamboo beams, although reconstructed bamboo inherits the characteristics of natural bamboo, which is green and has good toughness, and has successfully overcome its shortcomings such as large discreteness of mechanical properties, easy to be eaten by insects, and poor durability, as the main bending member in the structure, the elastic modulus of reconstructed bamboo beams is low. When designing reconstructed bamboo beams, they are often controlled by stiffness, and the strength of reconstructed bamboo is not fully utilized. Therefore, when checking the bearing capacity of reconstructed bamboo beams, in order to meet its stiffness requirements, a larger cross-sectional size is often required, which causes material waste and increases the weight of the structure itself.

Therefore, how to provide a reconstructed bamboo beam that meets both strength requirements and stiffness requirements is a problem that technical personnel in this field urgently need to solve.

Summary of the invention

To this end, an object of the present invention is to provide a reconstructed bamboo beam reinforced with a built-in vertical steel plate to solve the shortcomings of the reconstructed bamboo beam in the prior art.

The present invention provides a built-in vertical steel plate reinforced reconstructed bamboo beam, comprising:

The reconstructed bamboo beam body is a rectangular parallelepiped formed by bonding a plurality of arranged bamboo fiber bundles;

The steel plate is a rectangular plate body, the volume of which is smaller than that of the reconstructed bamboo beam body. The steel plate is vertically embedded in the reconstructed bamboo beam body and is bonded and hot-pressed with the reconstructed bamboo beam body.

It can be seen from the above technical solution that compared with the prior art, the present invention discloses a built-in vertical steel plate reinforced reconstructed bamboo beam. The built-in vertical thin steel plate is directly bonded and hot-pressed in the reconstructed bamboo beam processing project, without the need for grooving or secondary processing, so the integrity of the beam can be guaranteed. The steel plate is placed vertically, which can effectively improve the rigidity of the beam and solve the problem of excessive flexural deformation of the reconstructed bamboo beam as a bending member.

Furthermore, the steel plate is provided with a plurality of through holes perpendicular to its length, and the through holes are filled with bamboo fibers, which are bonded to bamboo fiber bundles; the through holes are provided on the steel plate without greatly affecting the rigidity, so as to achieve the purpose of saving steel and improving economic benefits; and they are evenly arranged in the steel plate, but do not need to be opened near the upper and lower edges of the steel plate, which is convenient for operation; at the same time, the through holes are filled with bamboo fibers, which are bonded to the bamboo fiber bundles of the reconstructed bamboo beam body, thereby enhancing the bonding effect between the steel plate and the reconstructed bamboo, and further improving the bonding ability of the two. Placing a vertical steel plate inside the reconstructed bamboo beam to improve the rigidity of the reconstructed bamboo beam is convenient and effective, and can also avoid corrosion of the steel plate, thereby enhancing the safety and durability of the component.

Another object of the present invention is to provide a method for preparing a reconstructed bamboo beam reinforced with an internal vertical steel plate, comprising the following steps: splitting a bamboo tube into strips, pressing the split bamboo strips into bamboo strips and bundling them into bamboo fiber bundles, and then dipping them in glue for later use; designing the steel plate according to the usage conditions, and determining the position and number of the steel plates in the reconstructed bamboo beam body; wrapping the steel plate with bamboo fibers, dipping it in glue, and drying it for later use; then making a mold, placing the steel plate vertically in the mold, laying the dipping bamboo fiber bundles, and hot-pressing the dipping bamboo fiber bundles and the dipping and drying steel plate into shape.

It can be seen from the above technical solutions that, compared with the prior art, the present invention discloses a method for preparing a reconstructed bamboo beam reinforced with a built-in vertical steel plate, wherein a steel plate is vertically arranged inside the reconstructed bamboo beam body, and is hot-pressed by bamboo fiber and glue, which is convenient to form without slotting or secondary processing, thereby ensuring the integrity of the beam body, enhancing the rigidity of the beam body, and solving the problem of excessive flexural deformation of the reconstructed bamboo beam as a bending member. The steel plate is built into the reconstructed bamboo beam body to avoid corrosion of the steel plate and enhance the safety and durability of the member.

Furthermore, the steel plate is a rectangular parallelepiped, and a plurality of through holes are opened perpendicular to its length direction, and the through holes are filled with bamboo fibers. The through holes are set on the steel plate, under the premise of not greatly affecting the rigidity, so as to achieve the purpose of saving steel and improving economic benefits; and they are evenly arranged in the steel plate, but do not need to be opened near the upper and lower edges of the steel plate, which is convenient for operation; at the same time, the through holes are filled with bamboo fibers, and the bamboo fibers are bonded with the bamboo fiber bundles of the reconstructed bamboo beam body, thereby enhancing the bonding effect between the steel plate and the reconstructed bamboo, thereby improving the bonding ability of the two.

The functions of the through holes in the present invention are: first, reducing the use of steel and improving economic benefits; second, bamboo fibers can be filled inside the through holes, and the bamboo fibers and the bamboo fiber bundles of the reconstructed bamboo beam body are bonded by glue, which enhances the bonding effect and improves the bonding ability of the two.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

FIG1 is a schematic diagram of the structure of a reconstructed bamboo beam reinforced with a built-in vertical steel plate provided by the present invention;

Figure 2 is a front view of Figure 1;

FIG3 shows a side view of FIG1 ;

FIG4 shows a side view of another embodiment;

In the figure: 100-reconstructed bamboo beam, 200-steel plate, 201-through hole.

DETAILED DESCRIPTION

Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is necessary to understand that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. 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 invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

In the existing reconstructed bamboo beams, although reconstructed bamboo inherits the characteristics of natural bamboo, which is green and has good toughness, and has successfully overcome its shortcomings such as large discreteness of mechanical properties, easy to be eaten by insects, and poor durability, as the main bending member in the structure, the elastic modulus of reconstructed bamboo beams is low. When designing reconstructed bamboo beams, they are often controlled by stiffness, and the strength of reconstructed bamboo is not fully utilized. Therefore, when checking the bearing capacity of reconstructed bamboo beams, in order to meet its stiffness requirements, a larger cross-sectional size is often required, which causes material waste and increases the weight of the structure itself.

To this end, the present invention provides a built-in vertical steel plate to strengthen the reconstructed bamboo beam. When processing the reconstructed bamboo, the steel plate is directly built into the reconstructed bamboo beam body without grooving or secondary processing, thereby effectively ensuring the integrity of the beam. By strengthening the reconstructed bamboo beam with the built-in vertical steel plate, it is equivalent to increasing the effective width of the reconstructed bamboo, which can effectively improve the elastic modulus of the reconstructed bamboo beam and increase the cross-sectional rigidity of the composite beam, thereby achieving the good effects of reducing the cross-sectional size, improving the bearing capacity of the component, and enhancing the bending performance of the reconstructed bamboo beam.

In one embodiment of the present invention, referring to Figures 1-3, it includes: a reconstructed bamboo beam body 100 is a rectangular parallelepiped with a height of 150 mm, a width of 100 mm, and a length of 6000 mm; a steel plate has a total width of 2 mm, a height of 130 mm, and a length of 5800 mm; the reconstructed bamboo beam body 100 is formed by bonding multiple bamboo fiber bundles; a steel plate 200 is vertically embedded in the reconstructed bamboo beam body 100, and is bonded and hot-pressed with the reconstructed bamboo beam body 100.

Referring to FIG. 4 , in another embodiment of the present invention, the invention comprises: a reconstructed bamboo beam body 100 is a rectangular parallelepiped with a height of 150 mm, a width of 100 mm, and a length of 6000 mm; a steel plate has a total width of 2 mm, a height of 130 mm, and a length of 5800 mm; the reconstructed bamboo beam body 100 is formed by gluing a plurality of bamboo fiber bundles; two steel plates 200 are provided, both of which are vertically embedded in the reconstructed bamboo beam body 100, and are arranged 20 mm close to the outer wall of the reconstructed bamboo beam body 100, and are glued and hot-pressed with the reconstructed bamboo beam body 100.

Advantageously, in the above two embodiments, a plurality of through holes 201 are provided on the steel plate 200 perpendicular to its length direction, and the through holes 201 are filled with bamboo fibers, which are bonded to bamboo fiber bundles. The through holes are provided on the steel plate without having a significant impact on the rigidity, thereby achieving the purpose of saving steel and improving economic benefits; and they are evenly arranged in the steel plate, but do not need to be opened close to the upper and lower edges of the steel plate, which is convenient for operation; at the same time, the through holes are filled with bamboo fibers, which are bonded to the bamboo fiber bundles of the reconstructed bamboo beam body, thereby enhancing the bonding effect between the steel plate and the reconstructed bamboo, thereby improving the bonding ability of the two.

The present invention also provides a method for preparing a reconstructed bamboo beam reinforced with a built-in vertical steel plate, comprising the following steps: splitting a bamboo tube into strips, pressing the split bamboo strips into bamboo strips and bundling them into bamboo fiber bundles, and then dipping them in glue for later use; determining whether there is a steel plate inside according to usage, including the specifications, shape, and quantity of the through holes; determining the position and quantity (single plate, double plate, thickness) of the steel plate in the reconstructed bamboo beam body so that the beam has sufficient rigidity; wrapping the steel plate with bamboo fibers, dipping it in glue, and drying it for later use, so as to obtain a better bonding effect between the steel plate and the reconstructed bamboo; and then making a mold, placing the steel plate vertically in the mold, laying the glue-dipped bamboo fiber bundles, and hot-pressing the glue-dipped bamboo fiber bundles and the glue-dipped and dried steel plate.

Therefore, the built-in vertical steel plates of the present invention are directly bonded and hot-pressed in the processing of the reconstructed bamboo beams, without the need for grooving or secondary processing, so the integrity of the beams can be guaranteed. The vertical placement of the steel plates can effectively improve the rigidity of the beams and solve the problem of excessive flexural deformation of the reconstructed bamboo beams as bending members. The through holes are evenly arranged in the steel plates, but do not need to be opened close to the upper and lower edges of the steel plates, which is convenient for operation; at the same time, the holes in the steel plates can enhance the bonding effect between the steel plates and the reconstructed bamboo, thereby improving the bonding ability of the two, and achieving the purpose of saving steel and improving economic benefits without greatly affecting the rigidity. Placing vertical steel plates inside the reconstructed bamboo beams to improve the rigidity of the reconstructed bamboo beams is a convenient and effective way of reinforcement, and can also avoid corrosion of the steel plates, thereby enhancing the safety and durability of the components.

In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification.

Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims (1)

1. A method for preparing a reconstructed bamboo beam reinforced with a built-in vertical steel plate, characterized by comprising: A reconstructed bamboo beam body (100), wherein the reconstructed bamboo beam body (100) is a rectangular parallelepiped formed by bonding a plurality of arranged bamboo fiber bundles; A steel plate (200), the steel plate (200) being a rectangular plate body, having a volume smaller than that of the reconstructed bamboo beam body (100), being vertically embedded in the reconstructed bamboo beam body (100), and being bonded and hot-pressed with the reconstructed bamboo beam body (100); The steel plate (200) is provided with a plurality of through holes (201) perpendicular to its length direction, and the through holes (201) are filled with bamboo fibers, and the bamboo fibers are bonded to the bamboo fiber bundles; Specifically, the method comprises the following steps: splitting a bamboo tube into strips, pressing the split bamboo strips into bamboo strips and bundling them into bamboo fiber bundles, and then dipping them in glue for later use; designing a steel plate (200) according to usage conditions, and determining the position and number of the steel plates (200) in the reorganized bamboo beam body (100); wrapping bamboo fibers around the steel plate (200), dipping them in glue, and drying them for later use; then making a mold, vertically placing the steel plate (200) in the mold, laying the bamboo fiber bundles dipped in glue, and hot-pressing the bamboo fiber bundles dipped in glue and the steel plate (200) that has been dried and dipped in glue to form; the steel plate (200) is a rectangular parallelepiped, and is provided with a plurality of through holes (201) perpendicular to its length direction, and the through holes (201) are filled with bamboo fibers.