CN214219961U

CN214219961U - Steel pipe sandwich bamboo-wood structure

Info

Publication number: CN214219961U
Application number: CN202022633279.0U
Authority: CN
Inventors: 朱超; 魏洋; 钱昊; 赵康; 董峰辉
Original assignee: Nanjing Forestry University
Current assignee: Nanjing Forestry University
Priority date: 2020-11-13
Filing date: 2020-11-13
Publication date: 2021-09-17
Anticipated expiration: 2030-11-13

Abstract

The utility model provides a steel pipe with filling bamboo wood structure, includes outside steel pipe, bamboo wood material, inside steel pipe sets up inside the cross-section of outside steel pipe, and bamboo wood material sets up in the intermediate layer space between outside steel pipe and the inside steel pipe. According to the invention, concrete in the traditional hollow sandwich steel pipe concrete structure is replaced by a light, high-strength and environment-friendly bamboo material, so that the dead weight of the structure is reduced and the anti-seismic performance of the structure is improved on the basis of ensuring the compressive strength of the structure, and meanwhile, the restraint of the inner steel pipe and the outer steel pipe can effectively delay the compression damage of the bamboo material. The invention has simple structure, convenient construction, excellent mechanical property and better popularization value.

Description

Steel pipe sandwich bamboo-wood structure

Technical Field

The invention belongs to the field of civil engineering, and relates to a combined structural member, in particular to a steel pipe sandwich bamboo-wood structure.

Background

Steel pipe concrete is widely used in various fields of civil engineering by virtue of excellent mechanical properties, however, the components are all non-renewable materials which are not friendly to the environment, and the raw materials of concrete in the components are increasingly scarce in fresh water and river sand resources, so that the long-term requirements are difficult to meet. Meanwhile, in recent years, the concept of sustainable development is increasingly emphasized in the field of buildings, a large amount of green environment-friendly materials such as wood and bamboo are used for replacing traditional building materials, and if the concrete in the steel tube concrete is partially replaced by the green environment-friendly bamboo, the problem of shortage of raw material resources of the concrete can be relieved, and the sustainable development strategy is also met.

At present, the research on the steel pipe-bamboo wood material combined structure is shallow, and related structures are few. For example, the Chinese patent '201920647081.2' discloses a bamboo reinforced steel tube structure, which comprises a transverse partition plate, a steel tube, a longitudinal reinforced bamboo and a transverse restrained bamboo, and overcomes the defect that the steel tube is singly supported and is easy to buckle and destabilize, the inward and outward local buckling of the steel tube is inhibited, the bamboo not only has the effect of effectively reinforcing the longitudinal and transverse mechanics, but also effectively protects the steel tube structure, highlights the green ecological concept of the building structure, and increases the aesthetic feeling of the structure; for another example, chinese patent "201910365951.1" discloses a steel tube-constrained bamboo-concrete composite member, which comprises a core bamboo material, interlayer concrete, a steel tube and an outer protective layer, the invention has simple and novel structure, light weight, high strength, and good bearing capacity and deformability, the constraint of the steel tube and the interlayer concrete can effectively delay the compression and damage of the bamboo material, and the bamboo material is green and environment-friendly, and has renewable resources, thereby meeting the sustainable development and having considerable economic benefits.

In conclusion, the existing steel pipe-bamboo material combined structure is few in form and needs to be further enriched and expanded, so that more new steel pipe-bamboo material combined structure forms need to be designed, the structure is enriched, and the structure is used as a bedding for popularization and application in actual engineering in the future.

Disclosure of Invention

The invention aims to provide a steel pipe sandwich bamboo-wood structure, the bamboo-wood material is green and environment-friendly, the material is convenient to obtain, the cost is relatively low, and researches show that the bamboo-wood structure is excellent in compression performance, so that the bamboo-wood structure is an excellent substitute material for concrete. The bamboo and wood material is arranged between the inner steel pipe and the outer steel pipe, so that the stress of the bamboo and wood material can be jointly applied to the inner steel pipe and the outer steel pipe, and the conditions of instability and local buckling of the steel pipes can be relieved when the steel pipes are independently applied. Meanwhile, the inner and outer steel pipes can effectively restrain the bamboo and wood materials in the interlayer, the compression performance of the bamboo and wood materials is improved, and the occurrence of compression damage of the bamboo and wood materials is delayed.

The technical scheme of the invention is as follows: the invention provides a steel pipe sandwich bamboo-wood structure which comprises an external steel pipe, a bamboo-wood material and an internal steel pipe and is characterized in that the internal steel pipe is arranged inside the cross section of the external steel pipe, the axis of the internal steel pipe is parallel to or coincident with the axis of the external steel pipe, the bamboo-wood material is arranged in an interlayer gap between the external steel pipe and the internal steel pipe and is filled with the whole interlayer, and the external steel pipe, the bamboo-wood material and the internal steel pipe jointly form the steel pipe sandwich bamboo-wood structure.

The cross section of the outer steel pipe and the cross section of the inner steel pipe are circular, square or polygonal.

The inner steel pipe can be coaxially arranged inside the section of the outer steel pipe, and can also be eccentrically arranged inside the section of the outer steel pipe.

The bamboo and wood material comprises one or more of bamboo and wood.

The height of the cross section of the inner steel pipe is 1/4-9/10 of the height of the cross section of the outer steel pipe.

The outer steel pipe has the same height as the inner steel pipe.

The invention has the following advantages:

1) the dead weight of the structure is reduced, the appearance of the original structure is not changed, the number of related components is small, the operation is convenient, the realization is easy, the cross section forms are various, and the application range is wide;

2) the bamboo and wood materials are environment-friendly, convenient to obtain, degradable, relatively low in cost, good in economic benefit and excellent in mechanical property, and are used as substitute materials of concrete, so that the consumption of concrete materials is reduced, fresh water and river sand resources are saved, and the sustainable development strategy is met;

3) the shock resistance and the anti-deformation capacity of the structure can be effectively enhanced, the time and the degree of local buckling of the steel pipe are delayed, the problem that a single steel pipe is easy to lose stability is solved, the compression resistance of the bamboo and wood material is improved due to the constraint effect of the steel pipe, and the occurrence of compression damage of the bamboo and wood material is delayed.

Drawings

FIG. 1: a steel tube sandwich bamboo structure is characterized in that a circular inner steel tube is concentrically arranged inside the section of a circular outer steel tube;

FIG. 2: a steel tube sandwich bamboo structure is characterized in that a round inner steel tube is concentrically arranged inside the cross section of a square outer steel tube;

FIG. 3: a steel tube sandwich bamboo structure is characterized in that a square inner steel tube is concentrically arranged inside the cross section of a round outer steel tube;

FIG. 4: a steel tube sandwich bamboo structure is characterized in that a square inner steel tube is concentrically arranged inside the cross section of a square outer steel tube;

FIG. 5: a steel tube sandwich bamboo structure is characterized in that a round inner steel tube is eccentrically arranged inside the section of a round outer steel tube;

in the drawings, 1 is an outer steel pipe; 2 is made of bamboo and wood materials; and 3, an inner steel pipe.

Detailed Description

For a more clear understanding of the technical features, objects and effects of the present invention, the present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

Example 1:

the utility model provides a steel pipe sandwich bamboo wood structure, includes outside steel pipe 1, bamboo wood material 2, inside

steel pipe

3, and 3 coaxial centres of circular shape inside steel pipe arrange inside the cross-section of circular shape outside steel pipe 1, and bamboo wood material 2 is full of the intermediate layer between outside steel pipe 1 and inside steel pipe 3, constitutes steel pipe sandwich bamboo wood structure jointly with outside steel pipe 1 and inside steel pipe 3.

Example 2:

steel pipe

3, and 3 coaxial axials of circular shape inside steel pipe arrange inside the cross-section of square outside steel pipe 1, and bamboo wood material 2 is full of the intermediate layer between outside steel pipe 1 and inside steel pipe 3, constitutes steel pipe sandwich bamboo wood structure jointly with outside steel pipe 1 and inside steel pipe 3.

Example 3:

steel pipe

3, and 3 coaxial axials of square inside steel pipe arrange inside the cross-section of circular shape outside steel pipe 1, and bamboo wood material 2 is full of the intermediate layer between outside steel pipe 1 and inside steel pipe 3, constitutes steel pipe sandwich bamboo wood structure jointly with outside steel pipe 1 and inside steel pipe 3.

Example 4:

steel pipe

3, and 3 coaxial axials of square inside steel pipe arrange inside the cross-section of square outside steel pipe 1, and bamboo wood material 2 is full of the intermediate layer between outside steel pipe 1 and inside steel pipe 3, constitutes steel pipe sandwich bamboo wood structure jointly with outside steel pipe 1 and inside steel pipe 3.

Example 5:

steel pipe

3, and 3 eccentricities of circular shape inside steel pipe arrange inside the cross-section of circular shape outside steel pipe 1, and bamboo wood material 2 is full of the intermediate layer between outside steel pipe 1 and inside steel pipe 3, constitutes steel pipe sandwich bamboo wood structure jointly with outside steel pipe 1 and inside steel pipe 3.

In the above embodiments:

the bamboo material 2 is one or more of bamboo and wood.

The height of the cross section of the inner steel pipe 3 is 1/4-9/10 of the height of the cross section of the outer steel pipe 1.

The outer steel pipe 1 has the same height as the inner steel pipe 3.

Claims

1. The utility model provides a steel pipe sandwich bamboo wood structure, including outside steel pipe (1), bamboo wood material (2), inside steel pipe (3) of its characterized in that sets up inside the cross-section of outside steel pipe (1), the axis of its axis and outside steel pipe (1) is parallel to each other or coincides, bamboo wood material (2) set up in the intermediate layer clearance between outside steel pipe (1) and inside steel pipe (3), be full of whole intermediate layer, outside steel pipe (1), bamboo wood material (2), a steel pipe sandwich bamboo wood structure is constituteed jointly in inside steel pipe (3).

2. A steel tube sandwich bamboo-wood structure according to claim 1, characterized in that the cross-sectional shape of the outer steel tube (1) and the inner steel tube (3) is circular, square or polygonal.

3. A steel tube sandwich bamboo-wood structure according to claim 1, characterized in that the inner steel tube (3) is arranged coaxially inside the cross section of the outer steel tube (1), or eccentrically inside the cross section of the outer steel tube (1).

4. The steel pipe sandwich bamboo-wood structure as claimed in claim 1, wherein the height of the cross section of the inner steel pipe (3) is 1/4-9/10 of the height of the cross section of the outer steel pipe (1).

5. A steel tube sandwich bamboo-wood structure according to claim 1, characterized in that the outer steel tube (1) and the inner steel tube (3) have the same height.