CN211523767U

CN211523767U - Composite beam based on FRP

Info

Publication number: CN211523767U
Application number: CN201922460388.4U
Authority: CN
Inventors: 可守峰
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-09-18
Anticipated expiration: 2029-12-31

Abstract

The utility model relates to a composite beam based on FRP, including concrete beam main part and FRP section bar, the FRP section bar includes the I-steel that sets up in the concrete beam main part, the I-steel surface is provided with the tie coat, the tie coat surface is provided with CFRP cloth layer, the surface on CFRP cloth layer is provided with FRP sheet layer; a plurality of FRP reinforcing ribs are arranged in the concrete beam main body along the length direction of the concrete beam main body, the FRP reinforcing ribs are connected through the FRP ribs, and a plurality of FRP shear keys are arranged between the FRP section bars and the FRP ribs; the utility model has the advantages of strong anti-shearing capability, long service life and small dead weight.

Description

Composite beam based on FRP

Technical Field

The utility model belongs to the technical field of building structure, concretely relates to composite beam based on FRP.

Background

In recent years, with the rapid development of the economy of China, the township trend of people is increasingly prominent, in the process, the science and technology in the building field are rapidly developed, and the house is rapidly developed from the initial brick concrete structure and cast-in-place concrete structure to the prior prefabricated building component technology. The prefabricated building components can effectively shorten the construction period of a building site and reduce the working procedures of concrete pouring of the construction site, thereby avoiding building pollution.

Although prefabricated building elements offer many advantages for the field of construction and construction, the problems of weight and durability of prefabricated elements are of great concern. Especially, the building beam, the roof beam is the important weighing component in the building, and the weighing nature of current precast beam is poor, and especially contains some chemical impurity in the concrete and easily produces chemical corrosion to the reinforcing bar, easily causes the corruption to the reinforcing bar after the time passes, thus makes precast beam's bearing capacity descend, and in order to improve the bearing capacity of roof beam, usually increase the quantity of reinforcing bar does not have thereby lead to the dead weight of roof beam big, has further strengthened the atress of building again, influences the life of building on the whole.

Disclosure of Invention

The utility model aims at overcoming the not enough of prior art and providing a compound roof beam based on FRP that anti shear capacity is strong, long service life, dead weight are little.

The technical scheme of the utility model is realized like this:

an FRP-based composite beam comprises a concrete beam main body and an FRP profile, wherein the FRP profile comprises I-shaped steel arranged in the concrete beam main body, the outer surface of the I-shaped steel is provided with a bonding layer, the outer surface of the bonding layer is provided with a CFRP cloth layer, and the outer surface of the CFRP cloth layer is provided with an FRP plate layer; a plurality of FRP reinforcing ribs are arranged in the concrete beam main body along the length direction of the concrete beam main body, the FRP reinforcing ribs are connected through the FRP ribs, and a plurality of FRP shear keys are arranged between the FRP section bars and the FRP ribs.

Further, the cross-section of concrete beam main part is isosceles trapezoid, and the broadside of the trapezoidal concrete beam main part of equal waist is up.

Furthermore, the upper side and the lower side of the concrete beam main body are respectively provided with a lug which is used for positioning the floor slab and the upright post.

Preferably, the number of the FRP reinforcing ribs is four, and the four FRP reinforcing ribs are respectively arranged at four corners of the concrete beam main body.

Further, the bonding layer is epoxy resin or environment-friendly glue.

Further, the bonding layer, the CFRP cloth layer and the FRP plate layer are sequentially coated on the outer surface of the I-steel.

Further, the FRP shear key is T-shaped or I-shaped.

Further, the concrete beam main body is cast by high-strength concrete.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model discloses at I-steel's surface cladding tie coat, CFRP cloth layer and FRP sheet layer in proper order, wherein the tie coat has good adhesive property to I-steel and CFRP cloth layer, CFRP cloth layer intensity is high, density is little, thickness is thin, can not increase bearing and size of FRP sheet layer basically, FRP sheet layer has the light and hard, corrosion-resistant, characteristics that mechanical strength is high to compound CFRP cloth layer and FRP sheet layer at I-steel's surface is effectual to improve I-steel's anti-shear capacity;

2. the FRP reinforcing ribs are arranged at four corners of the concrete beam main body and are connected through the FRP ribs, so that the shearing resistance of the composite beam is effectively improved, and the bearing capacity of the whole composite beam is effectively improved by matching with the I-shaped steel;

3. the shear key is arranged between the FRP section bar consisting of the I-shaped steel, the bonding layer, the CFRP cloth layer and the FRP plate layer and the FRP rib, the integrity of the composite beam is effectively improved, and the concrete beam main body is formed by pouring high-strength concrete, so that the durability of the composite beam is further improved, and the service life of the composite beam is effectively prolonged;

4. the utility model discloses set up the lug respectively in the upper and lower side of concrete beam main part, be convenient for to the installation location of precast floor slab and prefabricated stand with the concrete beam main part during the construction, can effectively keep the wholeness and the uniformity of filling the frame;

in a word, the utility model has the advantages of strong anti-shearing ability, long service life and small dead weight.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

In the figure: 1. the concrete beam comprises a concrete beam main body, 2I-steel, 3 bonding layers, 4 CFRP cloth layers, 5 FRP plate layers, 6 FRP reinforcing ribs, 7 FRP ribs, 8 FRP shear keys, 9 lugs, 10 and a floor slab.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1, an FRP-based composite beam includes a concrete beam body 1 and an FRP profile, where the FRP profile includes an i-steel 2 disposed in the concrete beam body 1, an adhesive layer 3 is disposed on an outer surface of the i-steel 2, a CFRP cloth layer 4 is disposed on an outer surface of the adhesive layer 3, and an FRP plate layer 5 is disposed on an outer surface of the CFRP cloth layer 4; a plurality of FRP reinforcement ribs 6 are arranged in the concrete beam main body 1 along the length direction of the concrete beam main body, the FRP reinforcement ribs 6 are connected through FRP ribs 7, a plurality of FRP shear keys 8 are arranged between the FRP section and the FRP ribs 7, and at least two FRP shear keys 8 are respectively arranged on the upper side and the lower side of the FRP section.

In this embodiment, the cross section of the concrete beam main body 1 is an isosceles trapezoid, the wide side of the isosceles trapezoid concrete beam main body 1 faces upward, and the beam in this form can uniformly transfer the load applied to the floor slab 10; the upper side surface and the lower side surface of the concrete beam main body 1 are respectively provided with a lug 9 which is used for positioning with a floor slab 10 and an upright post; the quantity of FRP reinforcement muscle 6 is four, and four FRP reinforcement muscle 6 set up respectively in four angle departments of concrete beam main part 1, and four angle departments FRP strengthening rib 6 cooperate with FRP muscle 7, can go up the side to the concrete beam main part 1 and receive the lining and evenly transmit.

In this embodiment, the bonding layer 3 is epoxy resin or environment-friendly adhesive, preferably epoxy resin, and the epoxy resin has good bonding capability to the i-beam 2 and the CFRP cloth layer 4, so that the integrity between the i-beam 2 and the CFRP part layer 4 is effectively maintained; similarly, the CFRP cloth layer 4 and the FRP plate layer 5 are compositely bonded through epoxy resin.

In this embodiment, the adhesive layer 3, the CFRP cloth layer 4, and the FRP plate layer 5 are sequentially coated on the outer surface of the i-beam 2, so that the i-beam 2 is well protected by the CFRP cloth layer 4 and the FRP plate layer 5, the i-beam 2 is prevented from being chemically corroded when immersed in concrete for a long time, the CFRP cloth layer 4 has high strength, the FRP plate layer 5 has high mechanical strength, the acceptance capability of the i-beam 2 is further enhanced by the CFRP cloth layer 4 and the FRP plate layer 5, and the FRP plate layer have good shear resistance and effectively ensure the weighing capability of the composite beam as the core acceptance point of the i-beam 2 as.

In this embodiment, the FRP shear keys 8 are T-shaped or i-shaped, the FRP shear keys 8 stably connect the FRP section and the FRP ribs 7 together, so that the FRP reinforcing ribs 6, the FRP ribs 7 and the FRP section have good overall problem performance, and the FRP shear keys 8 also have certain force transmission capability, and can effectively and uniformly disperse the force applied to the concrete beam main body 1 by the floor slab 10 to the FRP section, and further uniformly distribute the force to the concrete beam main body 1; the concrete beam main body 1 is formed by pouring high-strength concrete, the high-strength concrete has the advantages of high density and low porosity, the high-strength concrete has good deformation resistance and pressure resistance, the weighing capacity of the composite beam is improved together with the FRP profiles, the FRP reinforcing ribs 6 and the FRP ribs 7, and the composite beam is prevented from being damaged seriously when an accident happens.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.

Claims

1. The utility model provides a composite beam based on FRP, includes concrete beam main part (1) and FRP section bar, the FRP section bar including set up in I-steel (2) in concrete beam main part (1), its characterized in that: the outer surface of the I-shaped steel (2) is provided with a bonding layer (3), the outer surface of the bonding layer (3) is provided with a CFRP cloth layer (4), and the outer surface of the CFRP cloth layer (4) is provided with an FRP plate layer (5); a plurality of FRP reinforcing ribs (6) are arranged in the concrete beam main body (1) along the length direction of the concrete beam main body, the FRP reinforcing ribs (6) are connected through FRP ribs (7), and a plurality of FRP shear keys (8) are arranged between the FRP section bars and the FRP ribs (7).

2. The FRP-based composite beam of claim 1, wherein: the cross section of the concrete beam main body (1) is isosceles trapezoid, and the wide side of the isosceles trapezoid concrete beam main body (1) faces upwards.

3. The FRP-based composite beam of claim 2, wherein: and the upper side surface and the lower side surface of the concrete beam main body (1) are respectively provided with a convex block (9) used for positioning with a floor slab (10) and an upright post.

4. The FRP-based composite beam of claim 2, wherein: the FRP reinforcement ribs (6) are four in number, and the four FRP reinforcement ribs (6) are arranged at four corners of the concrete beam main body (1) respectively.

5. The FRP-based composite beam of claim 1, wherein: the bonding layer (3) is epoxy resin or environment-friendly glue.

6. The FRP-based composite beam of claim 1, wherein: the bonding layer (3), the CFRP cloth layer (4) and the FRP plate layer (5) are sequentially coated on the outer surface of the I-shaped steel (2).

7. The FRP-based composite beam of claim 1, wherein: the FRP shear key (8) is T-shaped or I-shaped.

8. The FRP-based composite beam as claimed in any one of claims 1-7, wherein: the concrete beam main body (1) is formed by pouring high-strength concrete.