A co-extrusion molded bamboo-plastic combined frame structure beam

Abstract

The present application relates to a kind of bamboo plastic combination frame structure beam of co-extrusion molding, as structural load-bearing beam, including bamboo plastic outer ring and bamboo plastic layer board, rectangular tubular bamboo plastic outer ring is located outside, multiple bamboo plastic layer board is located inside bamboo plastic outer ring, bamboo plastic outer ring and bamboo plastic layer board between form lattice structure.It is specifically divided into two kinds:one is that bamboo plastic layer board includes bamboo plastic inner ring and bamboo plastic partition, rectangular tubular bamboo plastic inner ring is located inside bamboo plastic outer ring, multiple bamboo plastic partition is located between bamboo plastic outer ring and bamboo plastic inner ring;One is that bamboo plastic layer board includes multiple bamboo plastic partition, multiple bamboo plastic partition is located inside bamboo plastic outer ring, multiple bamboo plastic partition is staggered and is in grid shape.The present application also relates to another kind of bamboo plastic combination frame structure beam of co-extrusion molding.The bamboo plastic material of the present application has good mechanical properties, after being designed into lattice structure, can be used as structural load-bearing component, is applied in building structure, enhances the durability and ductility of composite beam, belongs to structural load-bearing component technology.

Description

TECHNICAL FIELD

[0001] The present application relates to structural load-bearing members, in particular to a co-extruded bamboo-plastic composite frame structure beam. BACKGROUND

[0002] Modern bamboo structure building system is a new type of structure system formed by a series of mechanical and chemical processing of natural bamboo to form various structural members, and assembling and installing the bamboo members by using modern structural design theory, construction method and maintenance technology under the premise of modern material science, mechanics and experimental science. In the past two decades, researchers have tried to composite bamboo with various materials and obtained many achievements. Some composite methods have formed a complete theoretical system and have been successfully applied in low-carbon buildings. The results of literature review at home and abroad show that the research and application of bamboo composite structure mainly concentrate in China. So far, the research objects of bamboo composite structure mainly include glued bamboo structure, bamboo-steel structure and bamboo-concrete structure, and the research and development of bamboo-plastic composite structure based on co-extrusion technology have not been reported.

[0003] In 2007, N.M. Stark et al. prepared a new type of core-shell wood-plastic composite (WPCs) by co-extrusion technology. After years of steady development, this co-extruded core-shell wood-plastic composite (Co-WPCs) has not only become a leader in the wood-plastic industry, but also a research hotspot in the field of scientific research at home and abroad in the past decade.

[0004] CN203284968U discloses a bamboo-plastic composite rib concrete beam, which comprises a concrete beam main body and corner bamboo-plastic composite ribs arranged at the four inner corners of the concrete beam main body. China has rich bamboo resources, and the use of bamboo-plastic composite rib material can save energy and reduce cost. The bamboo-plastic composite rib has good corrosion resistance, and its service life can be more than 100 years after proper pretreatment process, so it is particularly suitable for use in harsh environments such as ocean, humidity, saline land and saline-alkali land. The bamboo-plastic material is only used as a composite rib in the beam, and there is no scheme for using bamboo-plastic material as a structural load-bearing beam in the prior art.

[0005] As known by those skilled in the art, by adjusting the mixing ratio of bamboo powder, polyester, glass fiber and modified additives, co-extruded bamboo-plastic can obtain better mechanical parameters, and co-extruded bamboo-plastic composite with other building materials can obtain better mechanical properties.

[0006] Co-extrusion technology is the most effective method for preparing multi-layer structure composite materials. At present, this technology is widely used in the field of composite material research, and has not been reported in the field of structural engineering. The research and development of bamboo-plastic composite structure based on co-extrusion technology opens up a new field of bamboo application in building. By using co-extrusion technology, materials or chemicals with different advantages can be effectively combined to meet the different needs of building structure under extreme stress state and normal use state. SUMMARY

[0007] In view of the technical problems existing in the prior art, the present application aims to provide a co-extrusion molded bamboo-plastic combined frame structure beam which can be used as a structural load-bearing beam.

[0008] In order to achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0009] The co-extrusion molded bamboo-plastic combined frame structure beam which can be used as a structural load-bearing beam comprises a bamboo-plastic outer ring and a bamboo-plastic layer plate, the rectangular tubular bamboo-plastic outer ring is located at the outer side, and the multi-layer bamboo-plastic layer plate is located at the inner side of the bamboo-plastic outer ring, and a lattice structure is formed between the bamboo-plastic outer ring and the bamboo-plastic layer plate.

[0010] As a preferred embodiment, the bamboo-plastic layer plate comprises a bamboo-plastic inner ring and a bamboo-plastic partition layer, the rectangular tubular bamboo-plastic inner ring is located at the inner side of the bamboo-plastic outer ring, the multi-layer bamboo-plastic partition layer is located between the bamboo-plastic outer ring and the bamboo-plastic inner ring, the outer end of the bamboo-plastic partition layer is connected with the inner side of the bamboo-plastic outer ring, the inner end of the bamboo-plastic partition layer is connected with the outer side of the bamboo-plastic inner ring, and a ring of lattice structure is formed between the bamboo-plastic inner ring and the bamboo-plastic outer ring. A composite layer is arranged in the lattice of the lattice structure at the top and bottom of the beam. The composite layer is a concrete layer or a steel pipe layer. A steel pipe inner layer or an I-beam inner layer is arranged in the bamboo-plastic inner ring; the steel pipe inner layer is rectangular tubular and is arranged close to the inner wall of the bamboo-plastic inner ring; the upper and lower horizontal sections of the I-beam inner layer are arranged close to the upper and lower inner walls of the bamboo-plastic inner ring and cover the entire upper and lower inner walls.

[0011] As a preferred embodiment, the bamboo-plastic layer plate comprises a multi-layer bamboo-plastic partition layer, the multi-layer bamboo-plastic partition layer is located inside the bamboo-plastic outer ring, and the multi-layer bamboo-plastic partition layer is arranged in a grid shape in a longitudinal and transverse manner, so as to form a lattice structure inside the bamboo-plastic outer ring. A composite layer is arranged in the lattice of the lattice structure at the top and bottom of the beam. The composite layer is a concrete layer or a steel pipe layer.

[0012] As a preferred embodiment, the co-extrusion molded bamboo-plastic combined frame structure beam is manufactured by co-extrusion molding.

[0013] The co-extrusion molded bamboo-plastic combined frame structure beam which can be used as a structural load-bearing beam comprises a T-shaped steel, an I-beam, a bamboo-plastic outer ring and a bamboo-plastic partition layer; the horizontal section of the T-shaped steel is located at the top of the beam, the horizontal section with a larger width of the I-beam is located at the bottom of the beam, and the horizontal section of the T-shaped steel and the horizontal section with a larger width of the I-beam have equal widths; the bamboo-plastic outer ring comprises a rectangular frame section, a first covering section and a second covering section, the two rectangular frame sections are located between the horizontal section of the T-shaped steel and the horizontal section with a larger width of the I-beam, the first covering section covers the surface below the horizontal section of the T-shaped steel, and the second covering section covers the surface above the horizontal section with a larger width of the I-beam; the multi-layer bamboo-plastic partition layer is located inside the bamboo-plastic outer ring, and the multi-layer bamboo-plastic partition layer is arranged in a grid shape in a longitudinal and transverse manner, so as to form a lattice structure inside the bamboo-plastic outer ring.

[0014] The present application has the following advantages:

[0015] 1. The applicant accidentally discovered that bamboo plastic materials have good mechanical properties, and can be used as structural load-bearing beams after being designed into lattice structures.

[0016] 2. The application of bamboo plastic composite materials in building structures enhances the durability and ductility of composite beams.

[0017] 3. The specific advantages of bamboo plastic are: due to the combination with plastic, the hydrophilicity of the surface of the bamboo fiber is partially changed, making the final material have better moisture and water resistance than the original bamboo and wood; similar appearance and texture of bamboo wood, no cracks and warping, similar processing performance of bamboo wood, can be sawed, planed, glued, and nailed; higher hardness than plastic, excellent mechanical properties. The material has higher rigidity than general plastic, and can produce the required product shape and specification according to demand; natural surface effect, bamboo fiber gives the product a natural, green texture; strong antibacterial property, unique process retains the original structure of bamboo fiber, good antibacterial effect, unique process retains the original chemical structure and bactericidal performance of bamboo fiber, making the material also have bactericidal and deodorizing properties; the unique hollow structure of bamboo fiber gives the material the function of deodorizing and odor removal. Waste plastic and bamboo processing waste are recycled to protect the environment and turn waste into treasure; raw materials are widely available, and products can be recycled. Bamboo plastic composite materials have excellent environmental affinity and low carbon dioxide emissions. Good sound insulation and heat insulation effect, high hardness and strength, low cost, and small density.

[0018] 4. The composite layer is arranged at the top or bottom of the beam, i.e. the tensile or compressive part of the load-bearing beam structure, to improve the mechanical properties of the load-bearing beam structure. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 A cross-sectional view of a co-extrusion molded bamboo plastic composite frame structure beam according to Example 1.

[0020] Figure 2 A cross-sectional view of a co-extrusion molded bamboo plastic composite frame structure beam according to Example 2.

[0021] Figure 3 A cross-sectional view of a co-extrusion molded bamboo plastic composite frame structure beam according to Example 3.

[0022] Figure 4 A cross-sectional view of a co-extrusion molded bamboo plastic composite frame structure beam according to Example 4.

[0023] Figure 5 A cross-sectional view of a co-extrusion molded bamboo plastic composite frame structure beam according to Example 5.

[0024] Figure 6A cross-sectional view of a co-extrusion molded bamboo-plastic combined frame structure beam of Example 1.

[0025] Figure 7 A cross-sectional view of a co-extrusion molded bamboo-plastic combined frame structure beam of Example 7.

[0026] Figure 8 A cross-sectional view of a co-extrusion molded bamboo-plastic combined frame structure beam of Example 8.

[0027] Figure 9 A cross-sectional view of a co-extrusion molded bamboo-plastic combined frame structure beam of Example 9.

[0028] Figure 10 A cross-sectional view of a co-extrusion molded bamboo-plastic combined frame structure beam of Example 10.

[0029] Figure 11 A cross-sectional view of a co-extrusion molded bamboo-plastic combined frame structure beam of Example 11.

[0030] Figure 12 A cross-sectional view of a co-extrusion molded bamboo-plastic combined frame structure beam of Example 12.

[0031] Wherein, 1 is a bamboo-plastic inner ring, 2 is a bamboo-plastic outer ring, 3 is a bamboo-plastic spacer layer, 4 is a composite layer, 5 is a steel tube inner layer, 6 is an I-beam inner layer, 7 is a T-shaped steel, 8 is an I-beam, 9 is a rectangular frame section, 10 is a first covering section, and 11 is a second covering section. DETAILED DESCRIPTION

[0032] The application will be further described in detail below with specific embodiments.

[0033] Examples 1-4 are bamboo-plastic beams.

[0034] Example 1

[0035] A co-extrusion molded bamboo-plastic combined frame structure beam as a structural load-bearing beam, comprising a bamboo-plastic outer ring and a bamboo-plastic layer plate, a rectangular tubular bamboo-plastic outer ring is located on the outside, and a multi-layer bamboo-plastic layer plate is located on the inside of the bamboo-plastic outer ring, and a lattice structure is formed between the bamboo-plastic outer ring and the bamboo-plastic layer plate.

[0036] The bamboo-plastic layer plate comprises a plurality of bamboo-plastic spacer layers, the plurality of bamboo-plastic spacer layers are located inside the bamboo-plastic outer ring, and the plurality of bamboo-plastic spacer layers are longitudinally and transversely staggered in a grid shape, thereby forming a lattice structure inside the bamboo-plastic outer ring.

[0037] The bamboo-plastic spacer layer is a flat plate and extends through the entire length direction of the structural beam, and the spacing between adjacent bamboo-plastic spacer layers is small, so that a larger number of bamboo-plastic spacer layers are used.

[0038] Example 2

[0039] A co-extrusion formed bamboo-plastic composite frame structure beam, as a structural load-bearing beam, includes a bamboo-plastic outer ring and bamboo-plastic laminates. The rectangular tubular bamboo-plastic outer ring is located on the outside, and multiple layers of bamboo-plastic laminates are located inside the bamboo-plastic outer ring. A lattice structure is formed between the bamboo-plastic outer ring and the bamboo-plastic laminates.

[0040] The bamboo-plastic laminate includes a bamboo-plastic inner ring and bamboo-plastic partitions. The rectangular tubular bamboo-plastic inner ring is located inside the bamboo-plastic outer ring, and multiple layers of bamboo-plastic partitions are located between the bamboo-plastic outer ring and the bamboo-plastic inner ring. The outer ends of the bamboo-plastic partitions are connected to the inner side of the bamboo-plastic outer ring, and the inner ends of the bamboo-plastic partitions are connected to the outer side of the bamboo-plastic inner ring, thereby forming a lattice structure between the bamboo-plastic inner ring and the bamboo-plastic outer ring.

[0041] The cross-section of the bamboo-plastic outer ring is rectangular, the cross-section of the bamboo-plastic inner ring is rectangular, and the bamboo-plastic partitions are flat plates, running through the entire length direction of the structural beam.

[0042] To enhance the mechanical properties of the bamboo-plastic composite frame structure beam, an inclined bamboo-plastic partition is respectively arranged in the grids at the four corners of the lattice structure. The two ends of each inclined bamboo-plastic partition are connected to the inner diagonals of the corresponding lattice grid. The outer ends of each inclined bamboo-plastic partition are respectively located inside the four corners of the bamboo-plastic outer ring, and the inner ends of each inclined bamboo-plastic partition are respectively located outside the four corners of the bamboo-plastic outer ring.

[0043] Example 3

[0044] A co-extrusion formed bamboo-plastic composite frame structure beam, as a structural load-bearing beam, includes a bamboo-plastic outer ring and bamboo-plastic laminates. The rectangular tubular bamboo-plastic outer ring is located on the outside, and multiple layers of bamboo-plastic laminates are located inside the bamboo-plastic outer ring. A lattice structure is formed between the bamboo-plastic outer ring and the bamboo-plastic laminates.

[0045] The bamboo-plastic laminate includes multiple layers of bamboo-plastic partitions. The multiple layers of bamboo-plastic partitions are located within the bamboo-plastic outer ring and crisscross in a grid pattern, thereby forming a lattice structure within the bamboo-plastic outer ring.

[0046] The bamboo-plastic partitions are flat plates, running through the entire length direction of the structural beam. The spacing between adjacent bamboo-plastic partitions is relatively large, so the number of bamboo-plastic partition layers used is less.

[0047] To enhance the mechanical properties of the bamboo-plastic composite frame structure beam, some inclined bamboo-plastic partitions are installed inside the lattice structure. The inclined bamboo-plastic partitions form a cross shape "×", located within the grids of the "field" - shaped lattice at the center of the cross-section of the structural beam. The intersection center point of the inclined bamboo-plastic partitions coincides with the center point of the cross-section of the structural beam (i.e., the center of the "field" character), and the four end points of the intersection of the inclined bamboo-plastic partitions coincide with the four right-angle ends of the "field" character.

[0048] Example 4

[0049] A co-extruded bamboo-plastic composite frame structure beam, serving as a structural load-bearing beam, includes a bamboo-plastic outer ring and bamboo-plastic laminates. The rectangular tubular bamboo-plastic outer ring is located on the outside, and multiple layers of bamboo-plastic laminates are located inside the bamboo-plastic outer ring. A lattice structure is formed between the bamboo-plastic outer ring and the bamboo-plastic laminates.

[0050] The bamboo-plastic laminates include multiple layers of bamboo-plastic partitions. The multiple layers of bamboo-plastic partitions are located within the bamboo-plastic outer ring and crisscross in a grid pattern, thereby forming a lattice structure within the bamboo-plastic outer ring.

[0051] The bamboo-plastic partitions are flat plates, running through the entire length direction of the structural beam. The spacing between adjacent bamboo-plastic partitions is relatively large, so the number of bamboo-plastic partition layers used is relatively small.

[0052] To enhance the mechanical properties of the bamboo-plastic composite frame structure beam, an inclined bamboo-plastic partition is installed in each grid of the lattice structure. The inclined bamboo-plastic partitions form a cross shape "×". In this embodiment, there are 2 groups of cross-shaped bamboo-plastic partitions distributed vertically, located in the "field"-shaped lattice grids distributed vertically and horizontally in the cross-section of the structural beam. The central points of the intersections of the inclined bamboo-plastic partitions coincide with the center of the "field" respectively, and the four end points of the intersections of the inclined bamboo-plastic partitions coincide with the four right-angle ends of the "field" respectively.

[0053] Examples 5 - 7 are bamboo-plastic - concrete composite beams.

[0054] Example 5

[0055] A co-extruded bamboo-plastic composite frame structure beam, serving as a structural load-bearing beam, includes a bamboo-plastic outer ring and bamboo-plastic laminates. The rectangular tubular bamboo-plastic outer ring is located on the outside, and multiple layers of bamboo-plastic laminates are located inside the bamboo-plastic outer ring. A lattice structure is formed between the bamboo-plastic outer ring and the bamboo-plastic laminates.

[0056] The bamboo-plastic laminates include multiple layers of bamboo-plastic partitions. The multiple layers of bamboo-plastic partitions are located within the bamboo-plastic outer ring and crisscross in a grid pattern, thereby forming a lattice structure within the bamboo-plastic outer ring.

[0057] The bamboo-plastic partitions are flat plates, running through the entire length direction of the structural beam. The spacing between adjacent bamboo-plastic partitions is relatively small, so the number of bamboo-plastic partition layers used is relatively large.

[0058] Composite layers are provided in the grids of the lattice structures at the beam top and beam bottom. The composite layers are concrete layers.

[0059] The bamboo-plastic composite frame structure beam is fabricated by co-extrusion molding.

[0060] Example 6

[0061] The bamboo-plastic combined frame structure beam is formed by co-extrusion molding.

[0062] The bamboo-plastic layer plate comprises a bamboo-plastic inner ring and a bamboo-plastic partition layer.

[0063] The bamboo-plastic partition layer is a flat plate and penetrates the whole length direction of the structural beam.

[0064] In order to strengthen the mechanical properties of the bamboo-plastic combined frame structure beam, an inclined bamboo-plastic partition layer is arranged in each of the four corners of the lattice structure.

[0065] A composite layer is arranged in the lattice of the lattice structure at the top and bottom of the beam.

[0066] The composite layer is a concrete layer.

[0067] The bamboo-plastic combined frame structure beam is formed by co-extrusion molding.

[0068] Embodiment 7

[0069] The bamboo-plastic combined frame structure beam is formed by co-extrusion molding.

[0070] The bamboo-plastic layer plate comprises a bamboo-plastic inner ring and a bamboo-plastic partition layer.

[0071] The bamboo-plastic partition layer is a flat plate and penetrates the whole length direction of the structural beam.

[0072] To enhance the mechanical properties of the bamboo-plastic composite frame structure beam, a slanted bamboo-plastic interlayer is installed in each square of the lattice structure. The slanted bamboo-plastic interlayers are in a cross-shaped "×" pattern. In this embodiment, there are two groups of cross-shaped bamboo-plastic interlayers distributed vertically, located respectively in the squares of the "field"-shaped lattice in the upper and lower parts of the cross-section of the structure beam. The central points of the intersections of the slanted bamboo-plastic interlayers coincide with the center of the "field" character, and the four end points of the intersections of the slanted bamboo-plastic interlayers coincide with the four right-angle ends of the "field" character.

[0073] A composite layer is provided in the squares of the lattice structure at the beam top and the beam bottom, and the composite layer is a concrete layer.

[0074] The bamboo-plastic composite frame structure beam is fabricated by co-extrusion molding.

[0075] Examples 8 - 9 are bamboo-plastic - steel composite beams.

[0076] Example 8

[0077] A co-extrusion molded bamboo-plastic composite frame structure beam, serving as a structural load-bearing beam, includes a bamboo-plastic outer ring and bamboo-plastic laminates. The rectangular tubular bamboo-plastic outer ring is located on the outside, and multiple layers of bamboo-plastic laminates are located inside the bamboo-plastic outer ring. A lattice structure is formed between the bamboo-plastic outer ring and the bamboo-plastic laminates.

[0078] The bamboo-plastic laminates include multiple bamboo-plastic interlayers. The multiple bamboo-plastic interlayers are located within the bamboo-plastic outer ring, and the multiple bamboo-plastic interlayers crisscross to form a grid pattern, thereby forming a lattice structure within the bamboo-plastic outer ring.

[0079] The bamboo-plastic interlayers are flat plates, running through the entire length direction of the structure beam. The spacing between adjacent bamboo-plastic interlayers is small, so a relatively large number of bamboo-plastic interlayer layers are used.

[0080] A composite layer is provided in the squares of the lattice structure at the beam top and the beam bottom, and the composite layer is a steel pipe layer.

[0081] The bamboo-plastic composite frame structure beam is fabricated by co-extrusion molding.

[0082] Example 9

[0083] A co-extrusion molded bamboo-plastic composite frame structure beam, serving as a structural load-bearing beam, includes a bamboo-plastic outer ring and bamboo-plastic laminates. The rectangular tubular bamboo-plastic outer ring is located on the outside, and multiple layers of bamboo-plastic laminates are located inside the bamboo-plastic outer ring. A lattice structure is formed between the bamboo-plastic outer ring and the bamboo-plastic laminates.

[0084] The bamboo-plastic laminates include multiple bamboo-plastic interlayers. The multiple bamboo-plastic interlayers are located within the bamboo-plastic outer ring, and the multiple bamboo-plastic interlayers crisscross to form a grid pattern, thereby forming a lattice structure within the bamboo-plastic outer ring.

[0085] The bamboo-plastic partition layer is flat and extends through the entire length direction of the structural beam, and the spacing between adjacent bamboo-plastic partition layers is large, so that the number of layers of the bamboo-plastic partition layer used is small.

[0086] In order to strengthen the mechanical properties of the bamboo-plastic composite frame structural beam, some bamboo-plastic partition layers are arranged in the lattice structure, and the bamboo-plastic partition layers are arranged in an inclined manner.

[0087] The composite layer is arranged in the lattice of the lattice structure at the top and bottom of the beam.

[0088] The bamboo-plastic composite frame structural beam is made by co-extrusion molding.

[0089] Examples 10-11 are bamboo-plastic-I-beam / steel pipe concrete composite beams.

[0090] Example 10

[0091] A co-extrusion molded bamboo-plastic composite frame structural beam as a structural load-bearing beam comprises a bamboo-plastic outer ring and a bamboo-plastic layer plate, the rectangular tubular bamboo-plastic outer ring is located at the outer side, the multi-layer bamboo-plastic layer plate is located inside the bamboo-plastic outer ring, and the bamboo-plastic outer ring and the bamboo-plastic layer plate form a lattice structure therebetween.

[0092] The bamboo-plastic layer plate comprises a bamboo-plastic inner ring and a bamboo-plastic partition layer, the rectangular tubular bamboo-plastic inner ring is located inside the bamboo-plastic outer ring, the multi-layer bamboo-plastic partition layer is located between the bamboo-plastic outer ring and the bamboo-plastic inner ring, the outer end of the bamboo-plastic partition layer is connected to the inner side of the bamboo-plastic outer ring, and the inner end of the bamboo-plastic partition layer is connected to the outer side of the bamboo-plastic inner ring, so as to form a ring of lattice structure between the bamboo-plastic inner ring and the bamboo-plastic outer ring.

[0093] The cross section of the bamboo-plastic outer ring is rectangular, the cross section of the bamboo-plastic inner ring is rectangular, and the bamboo-plastic partition layer is flat and extends through the entire length direction of the structural beam.

[0094] In order to strengthen the mechanical properties of the bamboo-plastic composite frame structural beam, some bamboo-plastic partition layers are arranged in the lattice structure at the four corners, and each bamboo-plastic partition layer is arranged in an inclined manner.

[0095] The composite layer is arranged in the lattice of the lattice structure at the top and bottom of the beam, and the composite layer is also arranged in the lattice of the lattice structure at the left and right sides of the beam.

[0096] The composite layer is a concrete layer.

[0097] The bamboo-plastic inner circle is internally provided with a steel pipe inner layer; the steel pipe inner layer is a rectangular tube-shaped structure and is arranged in close contact with the inner wall of the bamboo-plastic inner circle.

[0098] The bamboo-plastic composite frame structure beam (including the composite layer and the steel pipe inner layer) is made by co-extrusion molding.

[0099] Embodiment 11

[0100] A co-extrusion molded bamboo-plastic composite frame structure beam as a structural load-bearing beam comprises a bamboo-plastic outer circle and a bamboo-plastic layer plate, the rectangular tube-shaped bamboo-plastic outer circle is located at the outer side, and the multi-layer bamboo-plastic layer plate is located at the inner side of the bamboo-plastic outer circle, and a lattice structure is formed between the bamboo-plastic outer circle and the bamboo-plastic layer plate.

[0101] The bamboo-plastic layer plate comprises a bamboo-plastic inner circle and a bamboo-plastic partition layer, the rectangular tube-shaped bamboo-plastic inner circle is located at the inner side of the bamboo-plastic outer circle, and the multi-layer bamboo-plastic partition layer is located between the bamboo-plastic outer circle and the bamboo-plastic inner circle, the outer end of the bamboo-plastic partition layer is connected with the inner side of the bamboo-plastic outer circle, and the inner end of the bamboo-plastic partition layer is connected with the outer side of the bamboo-plastic inner circle, so as to form a lattice structure between the bamboo-plastic inner circle and the bamboo-plastic outer circle.

[0102] The cross section of the bamboo-plastic outer circle is rectangular, the cross section of the bamboo-plastic inner circle is rectangular, and the bamboo-plastic partition layer is a flat plate and penetrates through the entire length direction of the structure beam.

[0103] In order to strengthen the mechanical properties of the bamboo-plastic composite frame structure beam, an inclined bamboo-plastic partition layer is arranged in each of the four corners of the lattice structure, the two ends of each inclined bamboo-plastic partition layer are connected with the inner opposite corners of the corresponding lattice structure, the outer end of each inclined bamboo-plastic partition layer is located at the inner side of the four corner portions of the bamboo-plastic outer circle, and the inner end of each inclined bamboo-plastic partition layer is located at the outer side of the four corner portions of the bamboo-plastic outer circle.

[0104] A composite layer is arranged in the lattice of the lattice structure at the top and bottom of the beam, and a composite layer is also arranged in the lattice of the lattice structure at the left and right sides of the beam.

[0105] The composite layer is a concrete layer.

[0106] A steel I-beam inner layer is arranged in the bamboo-plastic inner circle; the upper and lower horizontal sections of the steel I-beam inner layer are arranged in close contact with the upper and lower inner walls of the bamboo-plastic inner circle and cover the entire upper and lower inner walls.

[0107] The bamboo-plastic composite frame structure beam (including the composite layer and the steel I-beam inner layer) is made by co-extrusion molding.

[0108] Embodiment 12 is a bamboo-plastic-T-shaped steel-I-shaped steel composite beam.

[0109] Embodiment 12

[0110] The bamboo-plastic combined frame structure beam is extruded and molded, and is used as a load-bearing beam, and comprises a T-shaped steel, an I-shaped steel, a bamboo-plastic outer ring and a bamboo-plastic partition layer.

[0111] The bamboo-plastic partition layer is flat and extends through the whole length direction of the structure beam, and the distance between adjacent bamboo-plastic partition layers is large, so the number of layers of the bamboo-plastic partition layer used is small.

[0112] In order to enhance the mechanical properties of the bamboo-plastic combined frame structure beam, an inclined bamboo-plastic partition layer is arranged in each square of the lattice structure, the two ends of each inclined bamboo-plastic partition layer are connected to the inner opposite corners of the square, and the inclined bamboo-plastic partition layers in adjacent squares are connected at one end.

[0113] The bamboo-plastic combined frame structure beam (including the T-shaped steel and the I-shaped steel) is made by extrusion molding.

[0114] The above embodiment is the preferred embodiment of the present application, but the embodiment of the present application is not limited by the above embodiment, and any change, modification, replacement, combination, simplification made without departing from the spirit and principle of the present application shall be an equivalent replacement mode, and all shall be included in the protection scope of the present application.

Claims

1. A co-extruded bamboo-plastic composite frame structure beam as a structural load bearing beam, characterized in that: The bamboo-plastic outer ring and the bamboo-plastic layer board, the rectangular tubular bamboo-plastic outer ring is located at the outside, and the multi-layer bamboo-plastic layer board is located at the inside of the bamboo-plastic outer ring, and the bamboo-plastic outer ring and the bamboo-plastic layer board are surrounded to form a lattice structure; The bamboo-plastic layer board comprises a bamboo-plastic inner ring and a bamboo-plastic partition layer, the rectangular tubular bamboo-plastic inner ring is located at the inside of the bamboo-plastic outer ring, and the multi-layer bamboo-plastic partition layer is located between the bamboo-plastic outer ring and the bamboo-plastic inner ring, the outer end of the bamboo-plastic partition layer is connected with the inside of the bamboo-plastic outer ring, and the inner end of the bamboo-plastic partition layer is connected with the outside of the bamboo-plastic inner ring, so as to form a ring of lattice structure between the bamboo-plastic inner ring and the bamboo-plastic outer ring; The composite layer is arranged in the lattice of the lattice structure at the top and the bottom of the beam, and the composite layer is also arranged in the lattice of the lattice structure at the left side and the right side of the beam; The composite layer is a concrete layer or a steel pipe layer; The steel pipe inner layer or the I-steel inner layer is arranged in the bamboo-plastic inner ring, the steel pipe inner layer is rectangular tubular and closely arranged on the inner wall of the bamboo-plastic inner ring, and the upper and lower horizontal sections of the I-steel inner layer are closely arranged on the upper and lower inner walls of the bamboo-plastic inner ring and cover the entire upper and lower inner walls.

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