A composite column made of reconstituted bamboo concrete

Abstract

This utility model relates to the field of building technology, specifically disclosing a composite column made of reconstituted bamboo and concrete. It includes a tubular outer component, with a reconstituted bamboo column inside. Lightweight concrete is filled inside the outer component, and the lightweight concrete solidifies to form a concrete column that encloses the reconstituted bamboo column. The outer component provides external constraint, the central concrete column acts as a force transfer and buffer, and the core reconstituted bamboo column provides high-strength support. Through a reasonable synergistic design, these three components effectively improve the overall performance of the structure. Compared with traditional steel-tube-constrained concrete columns, this utility model achieves the effects of reducing self-weight and increasing load-bearing capacity.

Description

Technical Field

[0001] This utility model relates to the field of building technology, specifically to a composite column made of reconstituted bamboo concrete. Background Technology

[0002] In the field of modern construction engineering, steel-tube confined concrete columns are widely used in various building structures due to their high load-bearing capacity and good seismic performance.

[0003] Traditional steel-tube confined concrete columns typically consist of steel tubes filled with ordinary concrete. The steel tubes confine the concrete, improving its compressive strength and ductility. However, the high density of the concrete in traditional steel-tube confined concrete columns results in a heavy overall structural weight, increasing the burden on the foundation and limiting their application in projects sensitive to structural weight, such as long-span and high-rise buildings. Secondly, the pouring and curing of ordinary concrete requires a considerable amount of time, affecting construction progress and increasing costs. Furthermore, in the context of advocating for green and low-carbon buildings, traditional steel-tube confined concrete columns lack material sustainability, consuming large amounts of cement and other resources during production, resulting in high carbon emissions, which contradicts the development principles of green building. Utility Model Content

[0004] The purpose of this invention is to provide a composite column made of reconstituted bamboo concrete, which reduces its weight and increases its load-bearing capacity.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0006] A composite column made of reconstituted bamboo and concrete includes a tubular outer component, a reconstituted bamboo column inside the outer component, lightweight concrete filling the interior of the outer component, the lightweight concrete solidifying to form a concrete column, and the concrete column enclosing the reconstituted bamboo column.

[0007] Furthermore, it also includes a tubular first reinforcing cage and a second reinforcing cage, the diameter of the first reinforcing cage being larger than the diameter of the second reinforcing cage; the first reinforcing cage is disposed inside the outer fastener, the second reinforcing cage is disposed inside the first reinforcing cage, the reconstituted bamboo column is disposed inside the second reinforcing cage, and the outer fastener, the first reinforcing cage, the second reinforcing cage and the reconstituted bamboo column are coaxially arranged.

[0008] Furthermore, the external fastener includes a main steel pipe and a secondary steel pipe, the main steel pipe and the secondary steel pipe have the same diameter, and the two secondary steel pipes are respectively set at both ends of the main steel pipe in the axial direction; a sealing rubber ring is provided between the main steel pipe and the secondary steel pipe.

[0009] Furthermore, both the main steel pipe and the auxiliary steel pipe are square tubes; it also includes L-shaped angle irons, which are installed on the edges of the main steel pipe and the auxiliary steel pipe, and the angle irons connect the main steel pipe and the auxiliary steel pipe.

[0010] Furthermore, the reconstituted bamboo column is provided with multiple limiting annular grooves along the axial direction.

[0011] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0012] The outer fasteners provide external constraint, the middle concrete column serves as force transmission and buffer, and the core reconstituted bamboo column provides high-strength support. The three components, through reasonable collaborative design, effectively improve the overall performance of this utility model. Compared with traditional steel pipe-constrained concrete columns, the addition of reconstituted bamboo columns reduces the proportion of concrete, while the overall weight of the reconstituted bamboo columns is lower, enabling this utility model to achieve the effects of reducing self-weight and improving load-bearing capacity. Attached Figure Description

[0013] Figure 1 This is an overall drawing of the present utility model.

[0014] Figure 2 This is a cross-sectional view of the present invention.

[0015] Figure 3 This is a schematic diagram of the welded angle iron of this utility model.

[0016] Figure 4 This is an exploded view of the present invention.

[0017] Figure 5 This is a structural diagram of a sealed coil.

[0018] Figure 6 for Figure 2 Enlarged view of point A.

[0019] The labels in the diagram are as follows: 1-Concrete column, 2-Main steel pipe, 3-Secondary steel pipe, 4-Reconstructed bamboo column, 5-Limiting ring groove, 6-First reinforcing cage, 7-Second reinforcing cage, 8-Sealing coil, 81-Inner ring, 82-Outer ring, 9-Angle iron. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model, so as to provide a better understanding of the concept of the present utility model, the technical problem solved, the technical features constituting the technical solution and the technical effects brought about.

[0021] like Figure 1 , Figure 2 As shown, a composite column of reconstituted bamboo and concrete includes a tubular outer fastener, a reconstituted bamboo column 4 disposed inside the outer fastener, and lightweight concrete filled inside the outer fastener to form a concrete column 1, which encloses the reconstituted bamboo column 4.

[0022] The composite column consists of an outer fastener and a reconstituted bamboo column 4, with concrete filling the interior of the outer fastener. The reconstituted bamboo column 4 is placed inside the concrete column 1 formed by the solidification of the concrete, forming a reconstituted bamboo-steel pipe-concrete composite column structure. This achieves the goal of "material composite and structural simplification". In this new composite structure, the outer fastener provides external constraint, the middle concrete column 1 acts as force transmission and buffer, and the core reconstituted bamboo column 4 provides high-strength support. The three components are designed in a reasonable synergistic manner to effectively improve the overall performance of the structure. Compared with the traditional steel pipe-constrained concrete column 1, the addition of the reconstituted bamboo column reduces the proportion of concrete, while the overall weight of the reconstituted bamboo column is lower. This new structure has significant advantages in reducing self-weight, improving load-bearing capacity, optimizing construction efficiency, and promoting green and low-carbon buildings.

[0023] In recent years, lightweight concrete and reconstituted bamboo, among other new building materials, have attracted widespread attention due to their advantages such as lightweight, high strength, and environmental friendliness. Lightweight concrete features low density and good thermal insulation properties, effectively reducing the structural weight. Reconstituted bamboo, on the other hand, is a high-performance engineering material formed by processing and recombining bamboo, possessing high strength and good processing performance. How to rationally apply these new materials in steel-concrete composite structures to achieve complementary advantages and improve the overall performance of the structure has become an urgent problem to be solved in the field of building structures.

[0024] Reconstituted bamboo is a new type of bamboo material that is reorganized and strengthened. It involves processing bamboo into long strips, shreds, or crushed bundles, drying them, impregnating them with resin, drying them again to the required moisture content, and then laying them in a mold for high-temperature, high-pressure thermosetting to form a profile. Reconstituted bamboo is characterized by its high tensile strength. The average tensile strength parallel to the grain of reconstituted bamboo is 139.30 MPa (data source: "Experimental Study on Bending Performance of Reconstituted Bamboo-Cold-Formed Thin-Walled Steel Composite Beams", article number: 1000-6869(2024)S2-0430-10). In contrast, the tensile strength of conventional C20 concrete is 20 MPa. Using reconstituted bamboo as the core material of this invention, the reconstituted bamboo column 4 can achieve the effect of reducing self-weight and improving load-bearing capacity.

[0025] Lightweight concrete: Lightweight concrete, also known as lightweight aggregate concrete, refers to structural lightweight concrete with a strength grade of LC15-LC60, made from lightweight coarse aggregate (ceramsite), ordinary sand, cement, and water. Lightweight aggregate concrete features light weight, high strength, thermal insulation, earthquake resistance, and impermeability. When combined with reconstituted bamboo columns, it achieves the effect of reducing self-weight and increasing load-bearing capacity.

[0026] like Figure 4 , Figure 6As shown, the system further includes a tubular first reinforcing cage 6 and a second reinforcing cage 7, with the diameter of the first reinforcing cage 6 being larger than the diameter of the second reinforcing cage 7. The first reinforcing cage 6 is disposed inside the outer fixture, the second reinforcing cage 7 is disposed inside the first reinforcing cage 6, and the reconstituted bamboo column 4 is disposed inside the second reinforcing cage 7. The outer fixture, the first reinforcing cage 6, the second reinforcing cage 7, and the reconstituted bamboo column 4 are coaxially arranged. The first reinforcing cage 6 and the second reinforcing cage 7 serve the same purpose: to facilitate the support of the concrete column 1.

[0027] Furthermore, the external fastener includes a main steel pipe 2 and a secondary steel pipe 3, both with the same diameter. The two secondary steel pipes 3 are respectively positioned at both ends of the main steel pipe 2 along its axial direction. A sealing ring is provided between the main steel pipe 2 and the secondary steel pipe 3. The purpose of designing the main steel pipe 2 and secondary steel pipe 3 as disconnected components is to reduce the continuous connection length of the external fastener. The gap between the main steel pipe 2 and the secondary steel pipe 3 prevents the external fastener from yielding prematurely, allowing the concrete column 1 and the reconstituted bamboo column 4 to bear the load first, thus avoiding damage to the external fastener due to premature stress. Figure 5 As shown, the sealing ring includes an inner ring 81 and an outer ring 82. The inner ring 81 is located at the joint between the main steel pipe 2 and the auxiliary steel pipe 3, and the outer ring 82 is located on the outer surface of the main steel pipe 2 and the auxiliary steel pipe 3. The inner ring 81 and the outer ring 82 are integrally formed, and a notch is provided at the corner of the outer ring 82. Yielding refers to the phenomenon of a material yielding. Yielding is the mechanical behavior of a material where, when the stress reaches a critical value, the plastic deformation increases sharply while the stress remains stable or fluctuates slightly.

[0028] like Figure 3 As shown, both the main steel pipe 2 and the auxiliary steel pipe 3 are square tubes; it also includes L-shaped angle irons 9, which are installed on the edges of the main steel pipe 2 and the auxiliary steel pipe 3, connecting the main steel pipe 2 and the auxiliary steel pipe 3. The angle irons 9 are spot-welded to the edges of the main steel pipe 2 and the auxiliary steel pipe 3, covering the surface of the inner ring 81 and located at the notch of the outer ring 82, facilitating the connection between the main steel pipe 2 and the auxiliary steel pipe 3 and providing support for them. After the concrete column 1 is cast, the angle irons 9 can be disassembled by cutting the weld points on them, and the sealing ring can be removed through the break in the main steel pipe 2 and the auxiliary steel pipe 3, facilitating the formation of a composite column from the lightweight concrete column 1, the main steel pipe 2, the auxiliary steel pipe 3, and the reconstituted bamboo column 4.

[0029] Furthermore, the reconstituted bamboo column 4 is provided with multiple limiting annular grooves 5 along the axial direction. After the concrete column 1 is cast and formed, the concrete column 1 and the limiting grooves form a snap-fit ​​connection, increasing the contact area between the reconstituted bamboo column 4 and the concrete column 1, thereby making better use of the tensile strength of the reconstituted bamboo column 4.

[0030] The terms "connection" and "fixing" appearing in this utility model description can refer to fixed connection, processing and forming, welding, or mechanical connection. The specific meaning of the above terms in this utility model should be understood according to the specific circumstances.

[0031] In the description of this utility model, the terms "center", "upper", "lower", "horizontal", "inner", "outer", etc., are used only to indicate the orientation or positional relationship for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A composite column of reinforced bamboo concrete, characterized by: It includes a tubular outer fitting, with a reconstituted bamboo column (4) inside the outer fitting. Lightweight concrete is filled inside the outer fitting, and the lightweight concrete solidifies to form a concrete column (1). The concrete column (1) wraps the reconstituted bamboo column (4).

2. The composite column of claim 1, wherein: It also includes a tubular first steel cage (6) and a second steel cage (7), the diameter of the first steel cage (6) being larger than the diameter of the second steel cage (7); The first steel cage (6) is set inside the outer fastener, the second steel cage (7) is set inside the first steel cage (6), and the reconstituted bamboo column (4) is set inside the second steel cage (7). The outer fastener, the first steel cage (6), the second steel cage (7) and the reconstituted bamboo column (4) are coaxially arranged.

3. The composite column of claim 1, wherein: The external fasteners include a main steel pipe (2) and a secondary steel pipe (3). The main steel pipe (2) and the secondary steel pipe (3) have the same diameter, and the two secondary steel pipes (3) are respectively set at both ends of the main steel pipe (2) in the axial direction. A sealing ring is provided between the main steel pipe (2) and the auxiliary steel pipe (3).

4. The composite column of claim 3, wherein: Both the main steel pipe (2) and the auxiliary steel pipe (3) are square tubes; It also includes L-shaped angle iron (9), which is installed on the edge of the main steel pipe (2) and the auxiliary steel pipe (3) and connects the main steel pipe (2) and the auxiliary steel pipe (3).

5. The composite column of claim 1, wherein: The reconstituted bamboo column (4) is provided with multiple limiting annular grooves (5) along the axial direction.

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