CN209099637U - A large-diameter FRP bar end connection structure - Google Patents

Abstract

The utility model discloses a kind of major diameter FRP tendons material end connecting, including the concrete main body as main structure, several major diameter FRP tendons materials and the FRP stirrup for major diameter FRP tendons material described in banding are equipped with inside the concrete main body, in fork shape, axially adjacent two major diameter FRP tendons materials are bonded by end to be connected at the major diameter FRP tendons material both ends.Compared with the prior art, technical solutions of the utility model have many advantages, such as structure simply and reliably be connected, can simplify between axially adjacent multiple prefabricated major diameter FRP tendons material concrete beam components carry out axially be connected construction technology and raising connection structure reliability.

Description

A large-diameter FRP bar end connection structure

technical field

The utility model relates to the technical field of engineering building structure connection, in particular to a large-diameter FRP bar end connection structure.

Background technique

Reinforced concrete structures are widely used in modern engineering, but the corrosion of steel bars in reinforced concrete structures has seriously affected the durability, safety and practicability of structures. Fiber Reinforced Composite (FRP) bar is a composite material made of carbon fiber, glass fiber, aramid fiber and other high-performance continuous fibers and resin matrix by pultrusion process. High tensile strength, good corrosion resistance, non-magnetic, light weight, good design and other advantages, is a good material to replace steel.

However, FRP material is a thermosetting material with serious anisotropy, and cannot be welded and machined after forming. Therefore, the connection problem of FRP reinforcement has become a key problem restricting the application of FRP reinforcement. Compared with the existing casing connection and expansion connection, the bonding and binding lap joint method is widely used in practical projects because of its advantages of convenient construction and simple operation. This not only wastes the FRP bar, but also easily forms a weak layer at the lap joint, which ultimately affects the high-strength performance of the FRP bar.

Utility model content

The main purpose of this utility model is to propose a large-diameter FRP reinforcing bar end connection structure with a simple and reliable connection, which aims to simplify the axial connection construction between the axially adjacent prefabricated large-diameter FRP reinforcing bar concrete beam members. process and improve the reliability of the connected structure.

In order to achieve the above purpose, the utility model proposes a large-diameter FRP bar end connection structure, including a concrete main body as a main structure, and the concrete main body is provided with a number of large-diameter FRP bars and used to fasten the For the FRP stirrups of large-diameter FRP bars, the two ends of the large-diameter FRP bars are forked, and the two adjacent large-diameter FRP bars in the axial direction are connected by bonding at the ends.

Preferably, the ends of the large-diameter FRP bars are in a space umbrella-shaped bifurcation shape, and a cone block is provided in the middle of the ends of the large-diameter FRP bars to stretch the ends of the large-diameter FRP bars.

Preferably, the top of the large-diameter FRP bar is exposed on the top surface of the concrete main body, the bottom surface of the concrete main body is provided with a groove, and the bottom part of the large-diameter FRP bar is located in the groove, and the concrete The outer peripheral surface of the main body is provided with a glue injection through hole for glue injection and communicates with the groove.

Preferably, a plurality of sleeves are preset at the bottom of the concrete body to form the grooves, and the bottom ends of the large-diameter FRP bars pass through the sleeves and are partially located in the inner cavity of the sleeves.

Preferably, the shape of the large-diameter FRP bar is a one-dimensional rod.

Preferably, the fiber material of the large-diameter FRP bar is any one of carbon fiber, glass fiber, basalt fiber or aramid; the matrix material of the large-diameter FRP bar is unsaturated polyester, epoxy resin, phenolic Either resin or barn resin.

Compared with the prior art, the technical solution of the present utility model has the following advantages:

The technical scheme of the utility model adopts segmented prefabricated large-diameter FRP reinforced concrete beam members to form an integral structure with a longer length, which can avoid the construction caused by the simultaneous construction of the longer FRP reinforcement in the prior art. Inconvenience and other shortcomings, so the technical scheme of the utility model makes the construction process easier.

In addition, the technical scheme of the present utility model adopts a space umbrella-shaped bifurcated structure at the ends of the large-diameter FRP bars. When the ends of the two adjacent large-diameter FRP bars in the axial direction are overlapped and connected, the increase can be increased by the overlap of the two. The overlapping area of the two will ultimately improve the reliability of the connection structure.

At the same time, the space umbrella bifurcation structure at the ends of large-diameter FRP bars can generate local pressure on the concrete main body after bonding and curing, so as to improve the anchorage capacity of large-diameter FRP bars and avoid large-diameter FRP bars in practical applications. It is easy to be pulled out, which further improves the connection reliability of the connection structure.

Description of drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are just some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can also be obtained based on the structures shown in these drawings without any creative effort.

Figure 1 is a schematic diagram of the internal structure of a prefabricated large-diameter FRP reinforced concrete beam member along the length direction;

Fig. 2 is the right side view of the prefabricated large-diameter FRP reinforced concrete beam member in Fig. 1;

Fig. 3 is the left side view of the prefabricated large-diameter FRP reinforced concrete beam member in Fig. 1;

Figure 4 is a schematic diagram of the connection of two axially adjacent prefabricated large-diameter FRP reinforced concrete beam members;

Figure 5 is a schematic diagram of the lap connection of the ends of the large-diameter FRP bars.

Description of reference numbers:

label name label name 1 Prefabricated Large Diameter FRP Reinforced Concrete Beam Elements 2 sleeve 11 Large diameter FRP bars 3 Cone block 12 FRP stirrups 4 glue injection through hole 13 concrete body

The realization, functional characteristics and advantages of the purpose of the present utility model will be further described with reference to the accompanying drawings in conjunction with the embodiments.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, not all of them. Example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

It should be noted that if there are directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention, the directional indications are only used to explain a certain posture (such as the accompanying drawings). When the relative positional relationship, movement situation, etc. between the various components shown below), if the specific posture changes, the directional indication also changes accordingly.

In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for the purpose of description, and should not be construed as instructions or Implicit their relative importance or implicitly indicate the number of technical features indicated. Thus, a feature delimited with "first", "second" may expressly or implicitly include at least one of that feature. In addition, the technical solutions between the various embodiments can be combined with each other, but must be based on the realization by those of ordinary skill in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that the combination of such technical solutions does not exist. , is not within the scope of protection required by the present utility model.

The utility model proposes a large-diameter FRP bar end connecting structure.

Referring to FIGS. 1 to 5, the technical solution of the embodiment of the present invention is mainly applied to the axial connection between two adjacent prefabricated large-diameter FRP reinforced concrete beam members 1, including a concrete main body 13 as the main structure. , a number of large-diameter FRP reinforcing bars 11 and FRP stirrups 12 for hooping the large-diameter FRP reinforcing bars 11 are arranged inside the concrete main body 13 . In order to realize the connection between two axially adjacent prefabricated large-diameter FRP reinforced concrete beam members 1, the top part of the large-diameter FRP reinforced material 11 in this embodiment is exposed outside the top surface of the concrete main body 13. At the same time, the concrete main body The bottom surface of 13 is provided with a groove, so that the bottom end of the large-diameter FRP bar 11 is exposed inside the groove. In order to more conveniently set a groove on the bottom surface of the concrete main body 13, in this embodiment, a sleeve 2 is pre-installed before the concrete main body 13 is poured, and the bottom end of the large-diameter FRP reinforcing bar 11 passes through the sleeve 2 and extends into the sleeve 2 inside. At the same time, a glue injection through hole 4 for glue injection is provided on the outer peripheral surface of the concrete main body 13 to communicate with the inside of the sleeve 2 , so that the adhesive can be easily injected into the sleeve 2 .

At the same time, in this embodiment, the iron cone block 3 is used, and the cone block 3 is driven into the end of the large-diameter FRP rib 11 with the help of external force, so that the end of the large-diameter FRP rib 11 is divided into a space umbrella. Fork shape, and the cone block 3 is pre-fixed by the adhesive, so that the end of the large-diameter FRP reinforced material 11 is always kept in a space umbrella-shaped bifurcation state, and then two adjacent prefabricated large-diameter FRP reinforced concrete beam members When axially connecting between 1, the axially adjacent large-diameter FRP reinforcing bars 11 are bonded and connected by an adhesive, so as to realize the connection between two axially adjacent prefabricated large-diameter FRP reinforcing concrete beam members 1. Axial connection.

Preferably, the large-diameter FRP bar end connecting structure of this embodiment can be used to connect two axially adjacent two beams whose cross-section is any one of a rectangular beam, a T-shaped beam, an I-beam, a channel beam or a box beam. The prefabricated large-diameter FRP reinforced concrete beam members 1 are connected to each other, and the fiber material of the large-diameter FRP reinforced material 11 is any one of carbon fiber, glass fiber, basalt fiber or aramid; the matrix of the large-diameter FRP reinforced material 11 The material is unsaturated polyester, epoxy resin, phenolic resin or baran resin.

The large-diameter FRP reinforcing bar end connection structure of the embodiment of the present invention is applied to the axial connection between a plurality of axially adjacent prefabricated large-diameter FRP reinforcing concrete beam members. The prefabricated large-diameter FRP reinforcing concrete beam components are: Any of rectangular beams, T-beams, I-beams, channel beams or box beams.

Please refer to FIG. 1 to FIG. 5 , the large-diameter FRP reinforced material end connecting structure of the embodiment of the present invention is connected to two axially adjacent prefabricated large-diameter FRP reinforced concrete beam members 1, which specifically includes the following steps:

First, ensure that the top of the large-diameter FRP bar 11 is exposed on the top surface of the concrete main body 13, and it is necessary to ensure that the bottom end of the large-diameter FRP bar 11 is exposed inside the preset sleeve 2, and then the cone 3 is driven to the large diameter by external force. At the end of the FRP reinforced material 11, the large-diameter FRP reinforced material 11 is in a space umbrella-shaped bifurcation shape, and the cone block 3 is pre-fixed by an adhesive. Then, two axially adjacent prefabricated large-diameter FRP reinforced concrete beams 1 are installed close together, and the top of the large-diameter FRP reinforced material 11 extends into the sleeve 2 on the bottom surface of another axially adjacent concrete main body 13 and is connected with the large-diameter FRP reinforcement. The bottom ends of the diameter FRP bars 11 are overlapped and connected to each other; finally, the adhesive is injected into the sleeve 2 through the glue injection through hole 4, so that the top of the upper and lower adjacent large-diameter FRP bars 11 and another adjacent large-diameter FRP The bottom ends of the ribs 11 are bonded and connected and finally fixedly connected.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. Under the conception of the present invention, the equivalent structure transformation made by using the contents of the description and drawings of the present invention, or directly / Indirect applications in other related technical fields are included in the scope of patent protection of the present utility model.

Claims (5)

1. a kind of major diameter FRP tendons material end connecting, which is characterized in that including the concrete main body as main structure, It is equipped with several major diameter FRP tendons materials inside the concrete main body and the FRP for major diameter FRP tendons material described in banding is bound round Muscle, the major diameter FRP tendons material both ends are bonded phase by end in fork shape, axially adjacent two major diameter FRP tendons materials Even, the major diameter FRP tendons material top is exposed to the concrete main body top surface, and the concrete main body bottom surface is equipped with groove, The major diameter FRP tendons material bottom part is located in the groove, and the concrete main body outer peripheral surface is equipped with the note for injecting glue Glue through-hole leads to the groove.

2. major diameter FRP tendons material end connecting as described in claim 1, which is characterized in that the major diameter FRP tendons material End is in space umbrella shape forked, and the medium position of the major diameter FRP tendons material end is equipped with conical blocks for the major diameter FRP Muscle material end struts.

3. major diameter FRP tendons material end connecting as claimed in claim 2, which is characterized in that the concrete main body bottom Portion is preset with several sleeves and forms the groove, and the major diameter FRP tendons material bottom end passes through the sleeve and part positioned at described In barrel bore.

4. major diameter FRP tendons material end connecting as described in claim 1, which is characterized in that the major diameter FRP tendons material Shape be one-dimensional rod-like.

5. major diameter FRP tendons material end connecting as described in claim 1, which is characterized in that the major diameter FRP tendons material Fiber Materials be carbon fiber, glass fibre, basalt fibre or aramid fiber any one；The base of the major diameter FRP tendons material Body material is any one of unsaturated polyester (UP), epoxy resin, phenolic resin or furane resins of barking.