CN217105813U - Large-span prestressing force FRP lattice formula roof beam - Google Patents

Abstract

The utility model relates to a large-span prestressed FRP lattice beam, which comprises a lattice beam, and FRP bars are stretched between two beam ends of the lattice beam. The lattice beam includes four FRP profile-type main bars located at the upper left corner, the lower left corner, the upper right corner and the lower right corner, respectively, and several FRP profile-type webs are fixed between the two adjacent FRP profile-type main bars. rod. The utility model has the characteristics of simple operation, light weight, reasonable and stable structure, high strength, strong anti-deformation ability, and less metal materials, which solves the problem of metal materials interfering with the magnetic field, which is of great significance to buildings such as seismic stations. At the same time, the aesthetics of the building is well maintained, and the safety, applicability and reliability of the building are improved.

Description

A long-span prestressed FRP lattice beam

technical field

The utility model relates to a large-span prestressed FRP lattice beam, which belongs to the technical field of building structures.

Background technique

Metal materials for construction refer to the general term for ferrous and non-ferrous metal materials for construction and their composite materials with other materials. Metal materials for construction are one of the four major categories of materials (steel, cement concrete, wood, and plastic) that constitute the material basis of civil engineering. Metal materials have high strength, good plasticity and toughness, and good ductility. They can be processed by cold bending, cold drawing, cold drawing or cold rolling, and can be manufactured into various profiles, plates and wires. Welding, riveting and other processing and manufacturing. As a building decoration material, metal materials have the advantages of lightness, elegance and strength. At the same time, due to its light weight, metal materials can reduce deflection when used in large-span structures.

The structure supporting the building must avoid excessive deformation. Excessive deformation will have adverse effects on the structure, thereby affecting the aesthetics, safety, applicability and reliability of the building. At the same time, for buildings such as geological platforms, if metal materials are used, the magnetic field is often disturbed, thereby affecting the function of the building. How to use the lightest possible building structural components to meet the requirements of small deformation in the case of large spans, and to reduce the use of metal materials, but also to meet the characteristics of reasonable and stable structure, high strength, good safety and high reliability, this is an urgent problem.

Utility model content

In view of the deficiencies of the prior art, the technical problem to be solved by the present invention is to provide a large-span prestressed FRP lattice beam.

In order to solve the above-mentioned technical problems, the technical solution of the present utility model is: a large-span prestressed FRP lattice beam, including a lattice beam, and FRP bars are tensioned between the two beam ends of the lattice beam .

Preferably, the lattice beam includes four FRP profile-type main rods located at the upper left corner, the lower left corner, the upper right corner and the lower right corner respectively, and several FRP profiled main rods are fixed between two adjacent FRP profiled main rods. Profiled web.

Preferably, both sides of the lower part of the beam end of the lattice beam are provided with cuboid members fixed on the FRP profile main rod, and the bottom surface of the rectangular parallelepiped member and the inner rod surface of the corresponding FRP profile main rod are provided with gap.

Preferably, the end sides of the FRP profile-type main rods under the lattice beams are all provided with through holes, and the FRP profile-type main rods are screwed together with the cuboid member through bolts passing through the holes.

Preferably, the cuboid members are all composed of six steel plates fixed and spliced to form a cuboid structure.

Preferably, beam end channels are provided below the beam ends of the lattice beam, and the bottom sides of the beam end channels are inserted into the lower gaps of the two cuboid members at the same beam end. The top sides are located on the upper surfaces of the two cuboid members at the same beam end, which are used to wrap the outer end sides of the cuboid members at the same beam end. one.

Preferably, the beam end channel steel in the area between the two cuboid members is provided with a plurality of reserved rib holes, and the ends of the FRP ribs pass through the reserved rib holes on the same end side and are provided with anchors.

Compared with the prior art, the utility model has the following beneficial effects: the utility model has the characteristics of simple operation, light weight, reasonable and stable structure, high strength, strong anti-deformation ability, less metal materials, etc., and solves the problem of metal materials interfering with magnetic fields. Problem, this is very meaningful for buildings like seismic stations. At the same time, the aesthetics of the building is well maintained, and the safety, applicability and reliability of the building are improved.

The present utility model will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

Description of drawings

FIG. 1 is a schematic structural diagram of a lattice beam in an embodiment of the present invention.

2 is a schematic structural diagram of installing a rectangular parallelepiped member on a lattice beam in an embodiment of the present invention.

3 is a schematic structural diagram of a beam end channel steel in an embodiment of the present invention.

FIG. 4 is a schematic structural diagram of an embodiment of the present invention.

Detailed ways

The present utility model will be further described below in conjunction with the accompanying drawings and embodiments.

It should be noted that the following detailed description is exemplary and intended to provide further explanation of the application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It should be noted that the terminology used herein is for the purpose of describing specific embodiments only, and is not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural as well, furthermore, it is to be understood that when the terms "comprising" and/or "including" are used in this specification, it indicates that There are features, steps, operations, devices, components and/or combinations thereof.

As shown in FIGS. 1 to 4 , this embodiment provides a large-span prestressed FRP lattice beam, including a lattice beam, and FRP bars 6 are stretched between the two beam ends of the lattice beam. . The FRP bars are arranged longitudinally along the bottom of the beam, and the diameter and spacing should be determined according to the specific project. The existence of FRP bars enables lattice beams to bear certain loads.

In the embodiment of the present invention, the lattice beam includes four FRP profile-type main rods 1 located at the upper left corner, the lower left corner, the upper right corner and the lower right corner respectively, and the space between the two adjacent FRP profile type main rods is Several FRP profile webs 2 are fixed. FRP profile-type main rods are cross-connected by FRP profile-type web rods through glue connection to form lattice beams.

In the embodiment of the present utility model, the lower sides of the beam end of the lattice beam are provided with cuboid members 3 fixed on the FRP profile type main rod, and the bottom surface of the rectangular parallelepiped member is connected to the inner side of the corresponding FRP profile type main rod. There is a gap between the faces.

In the embodiment of the present utility model, the end side of the FRP profile-type main rod under the lattice beam is provided with a through hole 4, and the FRP profile-type main rod is screwed with the cuboid member through the bolt passing through the hole as one. The function of the bolt is to fix the cuboid member and the FRP profile main rod. At the same time, it acts as a shear key to effectively connect the two to make them deform continuously, bear the load together, and work together.

In the embodiment of the present invention, the rectangular parallelepiped components are all fixed and spliced by six steel plates to form a rectangular parallelepiped structure. The function of the cuboid member is to strengthen the anchorage, reduce stress concentration, local deformation, and improve the integrity.

In the embodiment of the present invention, beam end channel steels 5 are provided below the beam ends of the lattice beam, and the bottom sides of the beam end channel steels are inserted into the gap between the lower parts of the two cuboid members at the same beam end, so The top sides of the beam end channel steels are located on the upper surfaces of the two cuboid members at the same beam end, so as to wrap the outer end sides of the cuboid members at the same beam end, between the beam end channel steel and the outer end sides of the corresponding cuboid members. All screwed together as a whole.

In the embodiment of the present invention, a plurality of reserved rib holes 8 are opened on the beam end channel steel in the area between the two cuboid members, and the ends of the FRP ribs pass through the reserved rib holes on the same end side and Anchors 7 are provided. The prestressing of FRP bars should be determined according to the specific project. Too large prestress may cause the FRP tendon to be pulled off and other hazards, while too small prestress will make it difficult to meet the design requirements.

In an embodiment of the present utility model, the manufacturing process of the large-span prestressed FRP lattice beam comprises the following steps:

Step 1: Splicing FRP lattice beams, glue connection between FRP profile main rod and FRP profile web rod;

Step 2: Lap the six steel plates to the cuboid member and place them on both sides of the lower end of the beam cross section;

Step 3: Drill holes at the corresponding positions of the cuboid member and the FRP profile main rod, and connect them with bolts;

Step 4: Open the corresponding position of the beam end channel steel and the cuboid member, and connect them with bolts;

Step 5: Make holes on the channel steel at the beam end, and place FRP bars and anchors in the holes;

Step 6: Tension the FRP bar and apply prestress.

The utility model has the characteristics of simple operation, light weight, reasonable and stable structure, high strength, strong anti-deformation ability, and less metal materials, which solves the problem of metal materials interfering with the magnetic field, which is of great significance to buildings such as seismic stations. At the same time, the aesthetics of the building is well maintained, and the safety, applicability and reliability of the building are improved.

The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention in other forms. Any person skilled in the art may use the technical content disclosed above to change or remodel to equivalent changes. Equivalent Example. However, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solutions of the present invention still belong to the protection scope of the technical solutions of the present invention.

Claims (7)

1. A large-span prestressed FRP lattice beam, characterized in that it comprises a lattice beam, and FRP bars are stretched between two beam ends of the lattice beam. 2. The large-span prestressed FRP lattice beam according to claim 1, wherein the lattice beam comprises four FRP profile main beams located at the upper left corner, the lower left corner, the upper right corner and the lower right corner respectively. Several FRP profile web rods are fixed between two adjacent FRP profile type main rods. 3. The large-span prestressed FRP lattice beam according to claim 2, characterized in that: both sides below the beam end of the lattice beam are provided with cuboid members fixed on the FRP profile-type main rod , There is a gap between the bottom surface of the cuboid member and the inner rod surface of the corresponding FRP profile main rod. 4 . The large-span prestressed FRP lattice beam according to claim 3 , wherein the end sides of the FRP profile-type main rod under the lattice-type beam are all provided with through holes, and the FRP profile main The rod is screwed together with the rectangular parallelepiped member through a bolt passing through the hole. 5 . The large-span prestressed FRP lattice beam according to claim 3 , wherein the rectangular parallelepiped members are all fixed and spliced by six steel plates to form a rectangular parallelepiped structure. 6 . 6 . The large-span prestressed FRP lattice beam according to claim 3 , wherein the beam ends of the lattice beam are provided with beam end channels, and the bottom side of the beam end channels Both are inserted into the lower gap of the two cuboid members at the same beam end, and the top sides of the beam end channel steel are located on the upper surface of the two cuboid members at the same beam end, so as to wrap the outer end sides of the same beam end. The beam end channel steel and the outer end side of the corresponding cuboid member are all bolted into one body. 7. The long-span prestressed FRP lattice beam according to claim 6, wherein the beam end channel steel in the region between the two cuboid members is provided with a plurality of reserved rib holes, and the The ends all pass through the reserved rib holes on the same end side and are provided with anchors.

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