CN218622920U - FRP (fiber reinforced plastic) section bar and concrete connecting structure with closed section - Google Patents
FRP (fiber reinforced plastic) section bar and concrete connecting structure with closed section Download PDFInfo
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- CN218622920U CN218622920U CN202223063609.2U CN202223063609U CN218622920U CN 218622920 U CN218622920 U CN 218622920U CN 202223063609 U CN202223063609 U CN 202223063609U CN 218622920 U CN218622920 U CN 218622920U
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Abstract
The utility model discloses a FRP section bar and concrete connecting structure with a closed section, which comprises an FRP section bar, concrete and a shear connector; a bolt hole is reserved in the FRP section closed section, and the FRP section closed section is connected with concrete in a shearing manner through a shearing resistant connecting piece; the shear connector is formed by welding a shear nail on a unilateral bolt cap, wherein the shear nail is mainly used for shearing but cannot be connected with the FRP profile, and the unilateral bolt can realize the screwing connection at the outer side of the reserved hole of the FRP cross section closed profile, but has poor shearing resistance. The combination of the shear nail and the concrete can solve the problem that the shear nail is inconvenient to install when being applied to the FRP section closed section, and meanwhile, the effective combination of the FRP section and the concrete can be realized, the structure is reasonable, and the stress is clear; construction is convenient, and chemical bonding is avoided.
Description
Technical Field
The utility model relates to a section bar and concrete connection structure especially relate to and are used for having FRP section bar and concrete connection structure of closed cross section.
Background
In recent years, the FRP profile has been applied to civil engineering and building engineering structures due to the advantages of high strength, light weight, corrosion resistance, convenience in construction and forming and the like. However, the FRP section has the disadvantages of large initial investment, low rigidity, brittle failure, low strength utilization rate and the like, so that the FRP section and the concrete are combined, the compression resistance of the concrete and the tensile resistance of the FRP section can be fully utilized, and the FRP section is an effective structural form.
The cross-sectional form of the FRP section is usually i-shaped, rectangular, box-shaped, or the like. Rectangular or box sections are more widely used due to their higher torsional and shear strength. The FRP section and the concrete are combined to form a reliable connection structure. The existing research shows that the shear nails can achieve a good combination effect of the shear nails and the FRP section bar cannot be welded, and the shear nails are not convenient to install on the inner side of the FRP section bar with a closed section.
Disclosure of Invention
An object of the utility model is to overcome prior art's shortcoming, provide one kind can effectively solve with the shear force nail use have the cross section closed FRP section bar in, the installation is convenient, can make FRP section bar and concrete combination atress and atress performance good be used for having the cross section closed FRP section bar and concrete connection structure.
The utility model discloses a FRP section bar and concrete connection structure for having closed cross section, including the FRP section bar that has closed cross section, set for the position on FRP section bar roof open and to have a plurality of bolt holes, be connected with a shear connector in each bolt hole, each shear connector includes unilateral bolt, unilateral bolt include the sleeve, be provided with the steel gasket on the tip outer wall of one end of sleeve, the sleeve in insert the shank of bolt, the nut of shank of bolt compress tightly on the steel gasket; the conical head and the end part of the bolt rod, which is exposed out of the sleeve, are in threaded connection and are tightly pressed on the end part of the sleeve, a plurality of deformation joints are formed on the outer wall of the sleeve along the axial direction of the sleeve, and the nut of each unilateral bolt is fixedly connected with the bottom wall of the shear nail rod of the shear nail; the single-sided bolt is characterized in that the sleeve part of each single-sided bolt above the deformation joint is inserted into the bolt hole, the single-sided bolt below the deformation joint penetrates through the bolt hole, a steel gasket of the single-sided bolt is pressed on the top wall of the top plate of the FRP profile, a bolt rod of the single-sided bolt rotates to drive a conical head to rotate to the inside of the sleeve to expand the deformation joint of the sleeve into an umbrella shape, the umbrella shape is extruded on the bottom wall of the top plate of the FRP profile, the shear connector is fixed on the FRP profile, concrete is poured on the top wall of the FRP profile, and the shear nail is poured in the concrete.
The utility model discloses a the beneficial effect of the utility model is that:
the connecting structure is reasonable in structure and convenient to construct, and the problem that the shear nails are inconvenient to mount when applied to the FRP profiles with the closed sections can be effectively solved; the stress performance is good, and an FRP profile-concrete composite beam or an FRP profile-concrete composite plate can be formed; avoids chemical bonding and has good durability.
Drawings
Fig. 1 is a schematic structural view of a connecting structure for FRP section bars and concrete having a closed cross section;
FIG. 2 is a schematic view of a shear connector in the structure shown in FIG. 1;
FIG. 3 is a schematic view illustrating a one-sided bolt in the shear connector shown in FIG. 2;
fig. 4 is a structural view of a shear pin in the shear connector shown in fig. 2.
Detailed Description
To more clearly illustrate the objects, aspects and advantages of the present invention, the present invention will be further described with reference to the accompanying drawings and examples. It is obvious that the described embodiments are only some of the embodiments of the present invention, and not all of them. Based on the embodiments in the present invention, all other embodiments obtained by other technical personnel in the field without creative work belong to the protection scope of the present invention.
As shown in the accompanying drawings, the utility model discloses a structure for connecting FRP section bar and concrete with closed cross section, including FRP section bar 2 with closed cross section, set position on the FRP section bar 2 roof open and to have a plurality of bolt holes, be connected with a shear connector 3 in each bolt hole, each shear connector includes unilateral bolt 4, the nut of each unilateral bolt 4 and the bottom wall of shear pin 12 of shear pin 5 are fixed and are connected, shear pin 5 include shear pin 12 and fix the shear pin cap 11 at shear pin 12 top, unilateral bolt 4 market has sold, the structure is as shown in 3, including sleeve 8, be provided with steel washer 7 on the tip outer wall of one end of sleeve 8, in the sleeve in insert have bolt pole 10, the nut 6 of bolt pole 10 compresses tightly on steel washer 7; the conical head 9 and the end part of the bolt rod 10 exposed out of the sleeve are in threaded connection and are tightly pressed on the end part of the sleeve, and a plurality of deformation joints are formed on the outer wall of the sleeve 8 along the axial direction of the sleeve.
The sleeve part of each unilateral bolt 4 positioned above the deformation joint is inserted into the bolt hole, the unilateral bolt 4 positioned below the deformation joint penetrates through the bolt hole, a steel gasket 7 of the unilateral bolt 4 is pressed on the top wall of the top plate of the FRP profile 2, and a bolt rod 10 of the unilateral bolt 4 rotates to drive a conical head 9 to rotate to the inside of the sleeve to expand the deformation joint of the sleeve 7 into an umbrella shape and extrude the umbrella shape onto the bottom wall of the top plate of the FRP profile 2, so that the shear connector is fixed on the FRP profile.
Concrete 1 is poured on the top wall of the FRP section bar 2, and the shear nails 5 are poured in the concrete 1.
The construction steps of the structure are as follows:
firstly, a shear nail is welded on a unilateral bolt cap to form a shear connector, and then the shear connector is placed in a reserved bolt hole on the FRP section. When the wrench is used, the steel washer is fixed by one wrench, the nut is rotated by the other wrench, and the conical head rotates along with the rotation. When the conical head contacts with the sleeve, the transverse rib on the conical head can block the sleeve, the conical head can prop open the sleeve along with the continuous rotation of the screw cap until the sleeve is screwed, the shear connector can be fixed on the FRP section, and finally concrete 1 is poured on the FRP section to form a whole.
The foregoing description of the invention is provided to facilitate understanding and application of the invention by those skilled in the art. It will be apparent to those skilled in the art that various modifications can be easily made to the present invention and applied to other embodiments without the inventive faculty. Therefore, the present invention is not limited to the embodiments herein, and those skilled in the art should understand that modifications and alterations made without departing from the scope of the present invention are within the protection scope of the present invention.
Claims (1)
1. A connecting structure for FRP (fiber reinforced plastic) sections and concrete with closed sections comprises the FRP sections with the closed sections, wherein a plurality of bolt holes are formed in set positions on a top plate of the FRP sections, a shear connector is connected in each bolt hole, each shear connector comprises a single-side bolt, each single-side bolt comprises a sleeve, a steel gasket is arranged on the outer wall of the end part of one end of each sleeve, a bolt rod is inserted into each sleeve, and a nut of each bolt rod is pressed on the steel gasket; conical head and shank of bolt expose telescopic tip threaded connection and compress tightly the tip at this end of sleeve the sleeve outer wall on open along the sleeve axial and have multichannel movement joint, its characterized in that: the nut of each unilateral bolt is fixedly connected with the bottom wall of the shear nail rod of the shear nail; the single-sided bolt is characterized in that the sleeve part of each single-sided bolt above the deformation joint is inserted into the bolt hole, the single-sided bolt below the deformation joint penetrates through the bolt hole, a steel gasket of the single-sided bolt is pressed on the top wall of the top plate of the FRP profile, a bolt rod of the single-sided bolt rotates to drive a conical head to rotate to the inside of the sleeve to expand the deformation joint of the sleeve into an umbrella shape, the umbrella shape is extruded on the bottom wall of the top plate of the FRP profile, the shear connector is fixed on the FRP profile, concrete is poured on the top wall of the FRP profile, and the shear nail is poured in the concrete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223063609.2U CN218622920U (en) | 2022-11-18 | 2022-11-18 | FRP (fiber reinforced plastic) section bar and concrete connecting structure with closed section |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223063609.2U CN218622920U (en) | 2022-11-18 | 2022-11-18 | FRP (fiber reinforced plastic) section bar and concrete connecting structure with closed section |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218622920U true CN218622920U (en) | 2023-03-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223063609.2U Active CN218622920U (en) | 2022-11-18 | 2022-11-18 | FRP (fiber reinforced plastic) section bar and concrete connecting structure with closed section |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218622920U (en) |
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2022
- 2022-11-18 CN CN202223063609.2U patent/CN218622920U/en active Active
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