Patent Application
20210332589
This application claims priority to and the benefit of Korean Patent Application No. 10-2020-0050157, filed on Apr. 24, 2020, the disclosure of which is incorporated herein by reference in its entirety.
The present disclosure relates to a hoop locking device, and more particularly, to a hoop locking device for locking a hoop installed to surround a plurality of main reinforcements to give a transverse constraint force of the hoop.
Hoops are generally installed in a transverse direction of a circumference of a main reinforcement in a reinforcement concrete (or steel frame reinforcement concrete) compressed member or vertical member, such as a column, a beam, a shear wall, or an abutment of a building structure to fix a main reinforcement of a reinforcement concrete vertical member, prevent buckling of the main reinforcement, restrain transverse deformation (buckling) of the main reinforcement due to a vertical load, and increase the strength and ductility of a concrete core of a vertical member of reinforcement concrete, thereby preventing a brittle fracture, by which a reinforcement concrete vertical member is instantaneously broken. In particular, opposite ends of a hoop that surrounds a column main reinforcement are folded by a 135 degree hook to be fixed to a column core.
In
Because the external hoops and the internal hoops (cross-tie bars) fasten a main reinforcement in a reinforcement concrete column, a bar, and a shear wall according to the related art, the main reinforcement can resist against an earthquake when the earthquake occurs while restraining buckling of the column main reinforcement (an anti-earthquake design), and concrete in the column core is constrained by the internal and external hoops so that the docility of the reinforcement concrete column can be improved.
In the internal reinforcement structure of a reinforcement concrete structure according to the related art illustrated in
Meanwhile,
As illustrated in
However, the structure of the hoop locking device according to the related art is complex and it is difficult to construct the hoop locking device in a narrow space.
Furthermore, according to the related art, the external hoop 3 and the main reinforcement 2 may be directly fastened to each other by a fastening line to lock the external hoop 3. However, the method of fastening the external hoop 3 and the main reinforcement 2 by using the fastening line weakens the durability of the concrete structure due to a weak fastening state caused by a construction environment (a weather or an impact) and the like. Furthermore, a rotational force is given to the main reinforcement to couple the main reinforcement by using a spiral coupler and a spiral main reinforcement for promptness in a process of coupling a reinforcement net to the existing main reinforcement 2 after making the reinforcement net according to a reinforcement assembly method, and then, there is a danger of a low coupling force or an easy separation due to the rotational force when the external hoop 3 and the main reinforcement 2 are coupled to each other by the fastening line.
Meanwhile, another technology according to the related art is illustrated in
The technology discloses a hoop locking device including a first body 50 provided to abut an outer surface of the hoop 3, second bodies 70 extending from opposite ends of the first body 50 to extend inwards and between which the hoop 3 is located, third bodies 80 provided at ends of the pair of second bodies 70 to extend in different directions, and an introduction hole 90.
However, because the technology used a plate shape, and the fastening force of concrete is weak because the concrete is not perfectly introduced and does not make contact as a whole in the construction. Therefore, a separate configuration of the introduction hole 90 is necessary to solve the problem.
Furthermore, because the technology includes only the second bodies 70 formed to extend from the first body 50 formed vertically and the third bodies 80 formed at opposite ends of the second bodies 70 vertically in different directions, it fails to suggest a configuration for fixing the hoop locking device to another object. Accordingly, because the technology only pursue easiness of coupling with the hoop while not achieving a settling force of the third bodies 80, the whole hoop locking device may be separated together with the reinforcement if a severe external force such as an earthquake is applied.
(Patent Document 1) Korean Patent No. 10-1750792 (Jun. 27, 2017)
(Patent Document 2) Korean Patent No. 10-1457114 (Nov. 6, 2014)
The present disclosure has been made in an effort to solve the above-mentioned problems, and provides a hoop locking device that can lock a hoop for giving a transverse constraint force of the hoop with a simple structure.
According to an aspect of the present disclosure, there is provided a hoop locking device for locking an external hoop installed to surround a plurality of main reinforcements on the outside thereof, the hoop locking device including: first clips configured to fix opposite ends of hoops, which cross each other while passing by one of the plurality of main reinforcements, wherein each of the first clips includes: an annular ring formed to surround an overlapping portion of the hoops disposed to vertically overlap each other; a leg part extending radially from opposite ends of the annular ring; and anchor parts formed to be bent rearwards from ends of the leg parts, respectively, wherein the opposite ends of the hoops are bent by 90 degrees while passing by the main reinforcement, and wherein the leg part is formed to extend radially long from the opposite ends of the annular ring to be disposed in and fixed to a concrete core.
The hoop locking device may further include: second clips configured to prevent separation of the first clips from the hoops, each of the second clips may include: an arc-shaped hook coupled to one of the two leg parts; a stopper configured to be stopped the other of the two leg parts to restrain the other leg part from being widened; and a connector connecting the arc-shaped hook and the stopper, and an absorber for extending and contracting the connector may be formed in the connector.
The hoop locking device may further include fastening clips configured to fasten the hoops to the main reinforcement, each of the fastening clips may include: a first fastening hook formed to surround the main reinforcement; a second fastening hook extending from the first fastening hook and formed to surround the hoop; and a third fastening hook extending from the second fastening hook, and an absorber for easy deformation of the first fastening hook may be formed in the first fastening hook.
Each of the hoops may include linear portions and a corner portion, and each of the fastening clip may include flat shapes installed in the linear portions and a corner shape installed in the corner portion.
The third fastening hook may stop a tool for pulling the first fastening hook and the second fastening hook, such that the main reinforcement and the hoop are attached to each other by the first fastening hoop and the second fastening hoop.
The first fastening hook may be formed to be open toward the outside, the second fastening hook may be formed to be bent downwards from opposite ends of the first fastening hook so as to be opened toward the inner side, and the third fastening hook may be bent downwards from the second fastening hook to be opened toward the outside.
The hoop locking device of the present disclosure can effectively lock a hoop with a simple structure.
Furthermore, the hoop locking device of the present disclosure is less influenced by an external environment, can allow a reinforcement to be continuously constructed while a reinforcement net installed is not scattered and the shape of the reinforcement net is maintained even though a rotational force is given to a main reinforcement when a spiral main reinforcement is coupled to the spiral coupler in the case in which the preassembled reinforcement net is coupled to the main reinforcement installed in advance, and can prevent weakening of the main reinforcement and the hoop.
Furthermore, the hoop locking device of the present disclosure can easily couple the second fastening hook to the hoop by forming the absorber in the first fastening hook such that the first fastening hook is widened.
Furthermore, the hoop locking device of the present disclosure can use a tool when the main reinforcement and the hoop are attached to each other, by forming the third fastening hook.
Further, the hoop locking device of the present disclosure can be applied to both the corner portion and the linear portion.
Furthermore, the force transmission mechanism is that, when the main reinforcement of the corner portion, where the ends of the hoops cross each other, is about to buckle in a buckling direction, a bending moment is generated in the bending portion of the 90 degree hook of the hoop so that an end of the hoop is deformed to be straightened toward a deformation direction, and the settling force of the first clips of the present disclosure toward a direction of the concrete core is applied as a pressing force on ends of the hoop's 90 degree hook against the spreading deformation. That is, there is an effect of a resistant force as an effect of a lever.
The above and other objects, features, and advantages of the present invention will be more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which:
The present disclosure relates to a hoop locking device for locking hoops installed to surround a plurality of main reinforcements. A device for locking a hoop according to an embodiment of the present disclosure includes first clips, second clips and fastening clips. In the embodiment of the present disclosure, a hoop refers to an external hoop.
The first clips fix opposite ends of the hoops to give a transverse constraint force of the hoops to lock the hoops that surround the outside of the plurality of main reinforcements. The second clips prevent the first clips that fix the opposite ends of the hoops from being separated from the hoops, in addition to the first clips. Furthermore, the fastening clips lock the hoops by binding the main reinforcements and the hoops.
The first clips, the second clips, and the fastening clips may be properly combined in the interior of a concrete member of a structure, if necessary, to effectively lock the hoops.
Each of the first clips may include a linear shape and a flat shape, and in the embodiment, a linear shape will be illustrated in the drawings and described as a reference.
Hereinafter, the present disclosure will be described in detail with reference to the accompanying drawings.
As illustrated in
In detail, as illustrated in
In detail, the force transmission mechanism is that, when the main reinforcement 100 of the corner portion, where the ends of the hoops 200 cross each other, is about to buckle in a buckling direction D1, a bending moment is generated in the bending portion H of the 90 degree hook of the hoop so that an end of the hoop 200 is deformed to be straightened toward a deformation direction D2, and the settling force of the first clips 300 of the present disclosure toward a direction D3 of the concrete core is applied as a pressing force on ends of the hoop's 90 degree hook against the spreading deformation. That is, there is an effect of a resistant force as an effect of a lever.
That is, the first clips 300 may constraints of the hoops 200 to prevent buckling of the main reinforcement 100 as the annular rings 310 surround and fix the overlapping portion of the hoops 200 and the leg parts 320 are fixed to the concrete core of the reinforced concrete member such as a column.
Furthermore, if the first clips 300 of the present disclosure are also installed at portions, at which the 90 degree hook portions of the inner hoop (a cross-tie bar) and the linear portion of the external hoop cross each other, a settling force toward the core is also applied to the 90 degree hook portion of the inner hoop 200 so that the first clips 300 have an effect of resisting against the spearing deformation of the main reinforcement 100 (the main reinforcement except for the corner portion) due to bucking as a lever effect.
As illustrated in
Because the leg parts 320 of the first clips 300 are prevented from being widened, by the second clip 400, the first clip 300 can be prevented from being separated from the hoop 200 due to an impact or the like.
Meanwhile, when the preassembled main reinforcement 100 of column nets and a screw type coupler of the reinforcement installed in advance are coupled to each other, a rotational force should be given to the net main reinforcement 100 for assembling. Then, the rotational fastening of the main reinforcement 100 may be allowed while the preassembled column net shape is maintained even though a rotational force is given to the main reinforcement 100 of the net shape. The fastening clips are adapted to couple the hoops 200 installed to surround the plurality of main reinforcements 100 of the preassembled reinforcement nets to the main reinforcement 100. Then, the used main reinforcement 100 may be a spiral reinforcement. If the connection end of the main reinforcement 100 is extruded spirally, the spiral reinforcement may not be used.
As illustrated in
As illustrated in
The second fastening hook 520 is formed to extend from the first fastening hook 510 so as to surround the hoop 200. That is, the second fastening hook 520 is bent toward the lower side from the opposite ends of the first fastening hook 510 to be opened toward the inner side of the concrete column. As described above, by forming the absorber 511 in the first fastening hook 510, the second fastening hook 520 may be easily coupled to the hoop 200 after the first fastening hook 510 is coupled to the main reinforcement 100.
The third fastening hook 530 is formed to extend from the second fastening hook 520. That is, the third fastening hook 530 is bent downwards from the second fastening hook 520 to be opened toward the outside of the concrete column. The third fastening hook 530 does not function to directly couple the main reinforcement 100 and the hoop 200. The third fastening hook 530 stops a tool for pulling the first fastening hook 510 and the second fastening hook 520, such that the main reinforcement 100 and the hoop 200 are attached to each other by the first fastening hoop 510 and the second fastening hoop 520. That is, the first fastening hook 510 and the second fastening hook 520 are opened in opposite directions because the main reinforcement 100 and the hoop 200 are coupled to each other so that the main reinforcement 100 and the hook 200 are easily attached to each other if the tool is stopped by the third fastening hook 530 to be pulled. Then, one side (or opposite sides) of the third fastening hook 530 is an arc-shaped hook.
The above-described fastening clip may include a corner shape B and a flat shape A according to an installation location thereof. The corner shaped fastening clip, as illustrated in
The hoop locking device according to the present disclosure is not limited to the above-described embodiment, and may be variously modified and carried out without departing from the technical spirit of the present disclosure.
| Number | Date | Country | Kind |
|---|---|---|---|
| 10-2020-0050157 | Apr 2020 | KR | national |
