CN204282645U - A kind of new type FRP pipe-light weight concrete construction-shaped steel combination component - Google Patents

Abstract

The utility model discloses a novel FRP pipe-light concrete-shaped steel composite component, which includes an external FRP pipe and internal light concrete, and the FRP pipe wraps the light concrete to provide a ring direction for the light concrete. constraint. The utility model can greatly reduce the self-weight of the concrete composite structure, improve the static performance of the lightweight concrete composite structure, improve the anti-seismic performance and the corrosion resistance performance, and the construction is convenient and fast. It can be used as load-bearing components such as beams and columns, and is used in large industrial buildings and civil buildings.

Description

A New FRP Tube-Lightweight Concrete-Steel Composite Component

technical field

The utility model relates to the field of building materials and building structures, in particular to a novel FRP pipe-light concrete-shaped steel composite component.

Background technique

Green fiber composite material (FRP) is a new type of high-performance material, which has many advantages such as light weight, high strength, corrosion resistance, insulation, and heat insulation. In the prior art, more and more FRP materials are applied to new composite structures, but the FRP-concrete composite members at this stage are all aimed at ordinary concrete, which has the disadvantage of self-heaviness, and does not give full play to the light weight of FRP materials. Advantage.

Lightweight concrete is concrete with a weight less than 1950Kg/m ³ prepared from lightweight aggregates. At present, domestic lightweight concrete is mainly used for components that do not require high stress, such as enclosures, thermal insulation components, or panels. In view of the defects of low strength and poor ductility of lightweight concrete, it is rarely used as the main load-bearing member in civil engineering structures, and its lightweight properties have not been fully utilized in civil engineering structures.

The utility model combines the superior characteristics of FRP and lightweight concrete, fully exerts the light characteristics of the two, develops a new type of FRP pipe-lightweight concrete-shaped steel composite component, and applies lightweight concrete and FRP materials to structural functional materials , realizing the light weight, high strength, high ductility and high durability of the building structure is a major innovation of the structural system and has important engineering significance.

Utility model content

In view of the above-mentioned deficiencies in the prior art, the purpose of this utility model is to provide a novel FRP pipe-lightweight concrete-steel composite member, aiming to solve the problems of existing building materials such as dead weight, earthquake resistance and corrosion resistance. At the same time, promote the application of FRP and lightweight concrete in structural engineering, so as to truly realize the light weight, high strength, high ductility and high durability of structural load-bearing components.

The technical scheme of the utility model is as follows:

A novel FRP pipe-lightweight concrete-section steel composite member, which includes an external FRP pipe and internal lightweight concrete, and the FRP pipe wraps the lightweight concrete to provide circumferential constraints on the lightweight concrete.

In the novel FRP pipe-lightweight concrete-shaped steel composite member, steel pipes are arranged in the lightweight concrete.

In the novel FRP pipe-lightweight concrete-section steel composite member, section steel is arranged in the lightweight concrete.

In the novel FRP pipe-lightweight concrete-section steel composite member, the steel pipe is placed eccentrically, and screws are arranged around the steel pipe.

In the novel FRP pipe-lightweight concrete-shaped steel composite member, steel bars or FRP bars are arranged in the lightweight concrete.

The novel FRP pipe-lightweight concrete-section steel composite member, wherein the section steel is I-shaped steel, H-shaped steel or cross-shaped steel.

In the novel FRP pipe-lightweight concrete-section steel composite member, the steel pipe is a rectangular steel pipe, a square steel pipe or a round steel pipe.

The novel FRP pipe-lightweight concrete-section steel composite member, wherein, the FRP pipe is a rectangular FRP pipe, a square FRP pipe or a circular FRP pipe.

Beneficial effects: the utility model can greatly reduce the self-weight of the concrete load-bearing structure, significantly improve various performances of the lightweight concrete composite structure, improve the seismic performance and corrosion resistance of the composite structure, and the construction is convenient and quick, and can effectively promote lightweight concrete , Application of FRP materials in civil engineering load-bearing structures. It can be used as load-bearing components such as beams and columns, and is used in large industrial buildings and civil buildings.

Description of drawings

Fig. 1 is a schematic cross-sectional view of the first embodiment of the utility model.

Fig. 2 is a schematic cross-sectional view of the second embodiment of the utility model.

Fig. 3 is a schematic cross-sectional view of a third embodiment of the present invention.

Fig. 4 is a schematic cross-sectional view of a fourth embodiment of the present invention.

Fig. 5 is a schematic cross-sectional view of a fifth embodiment of the present invention.

Fig. 6 is a schematic cross-sectional view of a sixth embodiment of the present invention.

Fig. 7 is a schematic cross-sectional view of a seventh embodiment of the present invention.

Fig. 8 is a schematic cross-sectional view of an eighth embodiment of the present invention.

Fig. 9 is a schematic cross-sectional view of a ninth embodiment of the present invention.

Detailed ways

The utility model provides a new type of FRP pipe-lightweight concrete-shaped steel composite component. In order to make the purpose, technical scheme and effect of the utility model clearer and clearer, the utility model will be further described in detail below. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

The first embodiment of a new type of FRP pipe-lightweight concrete-shaped steel composite member provided by the utility model, as shown in Figure 1, includes an external FRP pipe 100 and an internal lightweight concrete 200, the FRP pipe 100 The lightweight concrete 200 is wrapped to provide a hoop constraint to the lightweight concrete 200 . Its essence is FRP pipe - lightweight concrete member.

The above-mentioned first embodiment belongs to a relatively basic structure, which is mainly composed of FRP pipe 100 and lightweight concrete 200. The external FRP pipe 100 can be the circular FRP pipe of the first embodiment, or it can be as shown in Figure 2 The rectangular FRP pipe of the second embodiment shown can of course also be a square FRP pipe or other improved shapes to meet the needs of different projects, while facilitating structural layout, design and construction of beam-column joints. The outer FRP tube 100 wraps the lightweight concrete 200 , thereby providing hoop restraint and enhancing the compressive performance and ductility of the lightweight concrete 200 . And since the lightweight concrete 200 is wrapped by the corrosion-resistant FRP pipe 100, it is more durable.

According to the stress requirements of the structure, steel bars or FRP bars (210) can be arranged in the inner lightweight concrete 200 to further improve its flexural bearing capacity as a beam member.

As a more preferred embodiment of the present utility model, as shown in Figure 3, the utility model's new FRP pipe-lightweight concrete-shaped steel composite member includes an external FRP pipe 100 and an internal lightweight concrete 200, and the FRP pipe 100 will light In addition, steel pipes 300 are arranged in the lightweight concrete 200 to wrap the lightweight concrete 200 to provide a hoop constraint to the lightweight concrete 200 . This component can further reduce the self-weight of the component on the basis of the first and second embodiments, while ensuring the bearing capacity and anti-seismic performance of the component. The outer FRP pipe 100 can be a circular FRP pipe as shown in FIG. 3 , or a rectangular FRP pipe as shown in FIG. 4 , or a square FRP pipe. The inner steel pipe 300 can be a circular steel pipe as shown in FIG. 3 , or a rectangular steel pipe as shown in FIG. 4 , or a square steel pipe to meet the needs of different projects. The structure of this composite column has better mechanical properties. The outward deformation of the steel pipe 300 is effectively restrained by the lightweight concrete 200 and the FRP pipe 100, and the outer layer of the FRP pipe 100 mainly contains hoop fibers, which can also be included for bending members. Vertical fibers, but no buckling issues. The FRP pipe 100 in the outer layer and the steel pipe 300 in the inner layer play a restraining role on the lightweight concrete 200 in the middle, so that the core lightweight concrete 200 is in a three-dimensional compression state, thereby improving the compressive strength and deformation capacity of the core lightweight concrete 200 , and improve the overall ductility of the member. At the same time, in the third embodiment, the mechanical properties of the component can be changed by changing the ratio of its inner diameter (the steel pipe 300 in the figure) to the outer diameter (the FRP tube 100 in the figure), and the cross-section of the combined component can be optimized according to different engineering requirements composition.

In addition, in this embodiment, screws can be added outside the steel pipe 300 to strengthen the interface bonding between the steel pipe and lightweight concrete, so as to ensure the joint work of the light concrete and the steel pipe. As a beam member, it can be welded on the outer surface of the steel pipe. Screws make the outer surface of the steel pipe rough and increase the shear bond to improve the cohesion to ensure the joint work of lightweight concrete and steel pipes, and can also add steel bars or FRP bars according to the bearing capacity requirements.

As a more preferred embodiment of the present utility model, as shown in Figure 5, the utility model's new FRP pipe-lightweight concrete-steel composite member includes an external FRP pipe 100 and an internal lightweight concrete 200. In addition, in the The lightweight concrete 200 is arranged with section steel 400 to further significantly improve the bearing capacity and seismic performance of the component. Due to the existence of section steel, this kind of component can give full play to the performance advantages of steel, FRP pipe and lightweight concrete, and greatly improve the bearing capacity and ductility of the entire component without increasing the section size of the column. It can be used as a super high-rise The external FRP pipe 100 of the vertical bending member in the building structure can be a rectangular FRP pipe, a square FRP pipe or a circular FRP pipe. The internal section steel can be I-shaped steel as shown in Figure 5, H-shaped steel as shown in Figure 7, or cross-shaped steel as shown in Figure 6, to meet the needs of different projects.

Similarly, in this embodiment, the external FRP pipe 100 can provide circumferential restraint to the lightweight concrete 200, so that the internal lightweight concrete 200 is in a three-way compression state, while being protected by the external FRP pipe 100, the internal lightweight concrete The durability of concrete 200 and section steel 400 is enhanced, and the influence of the external corrosion environment of the structure on the durability of the structure can be ignored.

As a more preferred embodiment of the present utility model, different from the above embodiments, steel pipes 300 are arranged in the lightweight concrete. At the same time, the steel pipe 300 is placed eccentrically in the lightweight concrete 200, as shown in Figure 8 and Figure 9, to increase the concrete thickness in the compression zone and improve the compressive strength, and because the steel pipe 300 is placed eccentrically, it can better withstand the stress. The nip utilizes the superior tensile properties of FRP pipe 100 and steel pipe 300. In the above-mentioned components, the closer to the central axis, the smaller the force, so the eccentric placement of the steel pipe 300 can optimize the mechanical performance of the structure, save material and reduce the weight of the component. In addition, screws 310 (which can be welded on the outer surface of the steel pipe 300 ) can be added around the steel pipe 300 to enhance the interface bonding between the steel pipe 300 and the lightweight concrete 200 . This member is mainly used as a flexural member of a building structure, such as a beam.

In each of the above embodiments, the lightweight concrete 200 is concrete configured with lightweight aggregates such as ceramsite, concrete with a dry apparent density of less than 1950Kg/m ³ , and the lighter the weight, the better, and further environmental protection can be used. Lightweight aggregates, such as urban silt, waste ceramics, and light aggregates prepared from waste glass, can achieve environmental protection and sustainable development of building materials. In addition, the lightweight concrete 200 can also be concrete configured by lightweight sand and lightweight aggregate.

In summary, the utility model can greatly reduce the self-weight of the concrete load-bearing structure, significantly improve the performance of the lightweight concrete composite structure, improve the seismic performance and corrosion resistance of the composite structure, and the construction is convenient and fast, and can effectively promote the lightweight Application of high-quality concrete and FRP materials in civil engineering load-bearing structures. The novel FRP pipe-shaped steel-light concrete composite component of the utility model can be used as load-bearing components such as beams and columns, and is applied to large-scale industrial buildings and civil buildings.

It should be understood that the application of the present utility model is not limited to the above examples, and those skilled in the art can improve or change according to the above description, and all these improvements and changes should belong to the protection of the appended claims of the present utility model scope.

Claims (8)

1. A novel FRP pipe-lightweight concrete-section steel composite member is characterized in that it comprises an external FRP pipe and internal lightweight concrete, and the FRP pipe wraps the light concrete to provide a ring direction to the light concrete. constraint. 2. The novel FRP pipe-lightweight concrete-shaped steel composite member according to claim 1, characterized in that steel pipes are arranged in the lightweight concrete. 3. The novel FRP pipe-lightweight concrete-shaped steel composite member according to claim 1, characterized in that, shaped steel is arranged in the lightweight concrete. 4. The novel FRP pipe-lightweight concrete-shaped steel composite member according to claim 2, characterized in that the steel pipe is placed eccentrically, and screws are arranged around the steel pipe. 5. The novel FRP pipe-lightweight concrete-shaped steel composite member according to any one of claims 1 to 4, characterized in that steel bars or FRP bars are arranged in the lightweight concrete. 6. The novel FRP pipe-lightweight concrete-shaped steel composite member according to claim 3, wherein the shaped steel is an I-shaped steel, an H-shaped steel or a cross-shaped steel. 7. The novel FRP pipe-lightweight concrete-shaped steel composite member according to claim 2, wherein the steel pipe is a rectangular steel pipe, a square steel pipe or a circular steel pipe. 8. The novel FRP pipe-lightweight concrete-shaped steel composite member according to claim 1, wherein the FRP pipe is a rectangular FRP pipe, a square FRP pipe or a circular FRP pipe.