KR102446357B1 - Joint structure and joint method of reinforced concrete and steel plate concrete - Google Patents

Abstract

An objective of the present invention is to provide a joint structure and joint method of reinforced concrete (RC) and steel plate concrete (SC) in which the joint between an RC structure and an SC structure is structurally stable and the concrete damage of the RC structure and the overturning of the SC structure can be prevented. According to the present invention, the joint structure of an RC structure and an SC structure comprises an RC structure, a fixing plate, a joint part, and an SC structure. The RC structure includes first concrete, horizontal reinforcing bars, and vertical reinforcing bars. The fixing plate is combined with the vertical reinforcing bars and fixed on the first concrete. The joint part includes a pair of lower steel plates fixed on the fixing plate, and a base plate located inside each pair of lower steel plates and coupled to the fixing plate by either a steel bar or the vertical reinforcing bar. The SC structure includes a pair of upper steel plates fixed on the pair of lower steel plates, and second concrete filled between the pair of upper steel plates and inside the joint part.

Description

Joint structure and joint method of reinforced concrete and steel plate concrete {JOINT STRUCTURE AND JOINT METHOD OF REINFORCED CONCRETE AND STEEL PLATE CONCRETE}

The present invention relates to a joint structure and a joint method between reinforced concrete and steel plate concrete in which the joint method between the reinforced concrete structure and the steel plate concrete structure, which is a heterogeneous member, is improved.

Reinforced concrete (RC) structures reinforced with reinforcing bars are manufactured by assembling formwork and reinforcing bars on site and pouring concrete into the formwork. If a reinforcing bar joint between two upper/lower RC structures is required, use the lap splice method in which the upper/lower two rebars are overlapped and joined, or the upper/lower two rebars are welded or a coupler is used. A mechanical joint method is used.

The steel plate concrete (SC) structure, recently developed for the purpose of shortening the construction period and improving workability, consists of a structure in which concrete is filled inside two steel plates facing each other. At this time, the two steel plates are maintained at a constant distance by a tie bar, and a plurality of studs are installed inside each steel plate to increase the integrity with the concrete. When the SC structure is applied to a part of the building, a joint section between the RC structure and the SC structure occurs.

Currently, various studies on the junction between the RC structure and the SC structure are in progress, and one of the currently developed joint methods is a method using a base plate. In this method, the reinforcing bar of the RC structure and the steel rod are connected using a coupler, the SC structure steel plate with the base plate installed is lifted and installed on the RC structure, and the steel rod is fixed to the base plate with a nut.

However, in the above-mentioned joint method, when an operator enters the SC structure, the working space is narrow, and there is a lot of difficulty in fixing the steel bar to the base plate due to the interference of the tie bar and studs installed on the steel plate first.

In addition, when loading a heavy SC structure on top of the RC structure, there is a high possibility that the concrete of the RC structure will be damaged due to the self-weight suppression type due to eccentricity or impact during loading. Because there is no configuration of the SC structure, there is a possibility of overturning, and there is a difficulty in field installation.

An object of the present invention is to provide a joint structure and a joint method between reinforced concrete and steel plate concrete that can prevent the RC structure and the SC structure from being structurally stable, and preventing damage to the concrete of the RC structure and the conduction of the SC structure.

The joining method of reinforced concrete and steel plate concrete according to an embodiment of the present invention comprises: (i) an RC structure manufacturing step of manufacturing a reinforced concrete (RC) structure including a first concrete and horizontal reinforcing bars and vertical reinforcing bars, (ii) ) Placing a fixing plate on the first concrete, a fixing plate installation step of combining the vertical reinforcing bar and the fixing plate, and (iii) placing a pair of lower steel plates having a base plate fixed therein on the fixing plate, and perpendicular to the steel bar The fixing plate and the base plate are combined using any one of the reinforcing bars, and a joint installation step of fixing the pair of lower steel plates to the fixing plate, (iv) fixing the pair of upper steel plates on the pair of lower steel plates, and pouring the second concrete between the pair of upper steel plates to produce a steel plate concrete (SC) structure.

The fixing plate may include a coupler corresponding to the vertical reinforcement, and the upper end of the vertical reinforcement may be coupled to the lower side of the coupler in the fixing plate installation step. In this case, the lower end of the steel bar may be coupled to the upper side of the coupler in the joint installation step, the upper end of the steel bar may be coupled to the base plate, and the pair of lower steel plates may be fixed to the fixing plate by welding or bolting. can

On the other hand, a portion of the vertical reinforcement may protrude upward of the first concrete, and a through hole corresponding to the vertical reinforcement is located in the fixing plate, so that the vertical reinforcement may pass through the fixing plate in the fixing plate installation step. In this case, the upper end of the vertical reinforcing bar may be coupled to the base plate in the joint installation step, and the pair of lower steel plates may be fixed to the fixing plate by welding or bolting.

At the lower end of the pair of upper steel plates, a giyeokja-shaped connecting portion for overlapping with the pair of lower steel plates may be located. In the SC structure manufacturing step, the pair of upper steel plates and the pair of lower steel plates may be fixed by welding or bolting at the connection part.

On the other hand, the pair of lower steel plates may have a greater thickness than the pair of upper steel plates, and the lower end of the upper steel plate may be fixed on the lower steel plate by welding in the SC structure manufacturing step.

On the other hand, in the SC structure manufacturing step, the lower end of the upper steel plate and the upper surface of the lower steel plate may be fixed by welding, and the backing plate may be fixed to the opposite surface of the lower end of the upper steel plate and the upper end of the lower steel plate.

An opening exposing the first concrete may be located in the fixing plate. In the SC structure manufacturing step, the second concrete may be integrated with the first concrete by filling the opening between the pair of upper substrates, the inside of the junction and the fixing plate.

The joint structure of reinforced concrete and steel plate concrete according to an embodiment of the present invention includes a reinforced concrete (RC) structure, a fixing plate, a joint, and a steel plate concrete (SC) structure. The RC structure includes the first concrete and horizontal reinforcement and vertical reinforcement. The fixing plate is coupled to the vertical reinforcing bar and is fixed on the first concrete. The junction includes a pair of lower steel plates fixed on the fixing plate, and a base plate positioned inside each of the pair of lower steel plates and coupled to the fixing plate by any one of a steel bar and a vertical reinforcing bar. The SC structure includes a pair of upper steel plates fixed on a pair of lower steel plates, and a second concrete filled between the pair of upper steel plates and inside the joint.

The fixing plate may include a coupler, and the upper end of the vertical reinforcing bar may be coupled to the lower side of the coupler, and both ends of the steel bar may be coupled to the upper side of the coupler and the base plate. On the other hand, a portion of the vertical reinforcement may protrude above the first concrete, a through hole through which the vertical reinforcement passes may be located in the fixing plate, and an upper end of the vertical reinforcement may be coupled to the base plate.

An opening exposing the first concrete may be located in the fixing plate, and the second concrete may be integrated with the first concrete by contacting the first concrete through the opening.

According to the present invention, the joint part does not interfere with other components during construction, so it is very easy to construct in the field. And since the fixing plate firmly fixes the junction and the SC structure thereon on the RC structure, it is possible to increase the structural stability of the joint structure and prevent the SC structure from being overturned. In addition, since the upper/lower steel plate does not contact the first concrete, it is possible to prevent damage to the first concrete by the upper/lower steel plate.

1 is a flowchart illustrating a joining method according to a first embodiment of the present invention.
FIG. 2 is a block diagram showing a first step of the joining method of the first embodiment shown in FIG. 1 .
3 is a block diagram showing a second step of the joining method of the first embodiment shown in FIG. 1 .
FIG. 4 is a plan view of the fixing plate shown in FIG. 3 .
5 is a block diagram showing a third step of the joining method of the first embodiment shown in FIG. 1 .
6 is a partial perspective view showing a part of the joint shown in FIG. 3 .
7 is a block diagram showing a fourth step of the joining method of the first embodiment shown in FIG. 1 .
8, 9, and 10 are configuration views showing the first modified example, the second modified example, and the third modified example of the upper steel plate and the lower steel plate shown in FIG. 7, respectively.
11 is a flowchart illustrating a joining method according to a second embodiment of the present invention.
12 is a block diagram showing a fifth step of the joining method of the second embodiment shown in FIG. 11 .
13 is a block diagram illustrating a sixth step of the joining method of the second embodiment shown in FIG. 11 .
14 is a plan view of the fixing plate shown in FIG. 13 .
15 is a block diagram illustrating a seventh step of the joining method of the second embodiment shown in FIG. 11 .
16 is a block diagram illustrating an eighth step of the joining method of the second embodiment shown in FIG. 11 .

Hereinafter, with reference to the accompanying drawings, embodiments of the present invention will be described in detail so that those of ordinary skill in the art to which the present invention pertains can easily implement them. The present invention may be embodied in many different forms and is not limited to the embodiments described herein.

1 is a flowchart illustrating a method of joining reinforced concrete and steel plate concrete according to a first embodiment of the present invention (hereinafter, referred to as a 'joining method' for convenience).

Referring to Figure 1, the joint method of the first embodiment, a first step (S10) of manufacturing a reinforced concrete (RC) structure, and a second step (S20) of fixing and installing a fixing plate having a coupler on the RC structure and a third step (S30) of fixing and installing a joint made of a base plate and a pair of lower steel plates and a steel bar on the fixing plate, and a fourth step (S40) of manufacturing a steel plate concrete (SC) structure on the joint. .

The fixing plate firmly fixes the vertical reinforcing bar and the joint of the RC structure to increase the structural stability of the joint structure. In the joint method of the first embodiment, the joint structure of reinforced concrete and steel plate concrete is largely divided into RC structure, fixing plate-junction structure, and SC structure and constructed.

FIG. 2 is a block diagram showing a first step of the joining method of the first embodiment shown in FIG. 1 .

Referring to FIG. 2 , in the first step S10 , the RC structure 10 includes a first concrete 11 , a horizontal reinforcing bar 12 , and a vertical reinforcing bar 13 . The entire horizontal reinforcing bar 12 is embedded in the first concrete 11 . Most of the vertical reinforcement 13 is embedded in the first concrete 11 , and the upper end of the vertical reinforcement 13 protrudes to the outside of the first concrete 11 . The RC structure 10 may be a slab, and may be manufactured by assembling a formwork, horizontal reinforcing bars 12 and vertical reinforcing bars 13, and then pouring concrete into the formwork.

FIG. 3 is a block diagram showing a second step of the joining method of the first embodiment shown in FIG. 1 , and FIG. 4 is a plan view of the fixing plate shown in FIG. 3 .

2 to 4 , in the second step ( S20 ), the fixing plate 20 includes a plurality of couplers 21 as a metal plate having a predetermined thickness. The coupler 21 is a joint member for connecting two metal rods such as reinforcing bars in the longitudinal direction, and a known one-touch type coupler may be used. The coupler 21 is provided with the same number as the vertical reinforcing bar 13 at the same position as the vertical reinforcing bar 13 .

An opening 22 exposing the first concrete 11 may be located in the center of the fixing plate 20 . The opening 22 may be formed in various shapes, such as a circle, an ellipse, a polygon, and a cross. Although the cross-shaped opening 22 is illustrated in FIG. 4 as an example, the shape of the opening 22 is not limited to the illustrated example. The function of the opening 22 will be described later in the fourth step.

The fixing plate 20 is disposed on the first concrete 11 , and the upper end of the vertical reinforcing bar 13 is coupled to the lower side of the coupler 21 . The vertical reinforcement 13 is fixed to the fixing plate 20 by the combination of the vertical reinforcement 13 and the coupler 20 .

5 is a block diagram showing a third step of the joining method of the first embodiment shown in FIG. 1 , and FIG. 6 is a partial perspective view showing a part of the joint shown in FIG. 3 .

Referring to FIGS. 5 and 6 , the bonding part 30 is fixedly installed on the fixing plate 20 in the third step ( S30 ). The joint part 30 includes a pair of lower steel plates 32 having a base plate 31 fixed therein, and a steel bar 33 for coupling the fixing plate 20 and the base plate 31 to the lower steel plate ( The lower end of the 32) is fixed on the fixing plate 20 by welding or bolting. In FIG. 5 , a case in which the lower steel plate 32 is fixed to the fixing plate 20 by welding is illustrated as an example.

In the method of installing the joint 30 , the lower end of the steel bar 33 is coupled to the upper side of the coupler 21 , and a pair of lower steel plates 32 to which the base plate 31 is fixed on the fixing plate 20 , arrangement, coupling the upper end of the steel bar 33 to the base plate 31 , and fixing the lower end of the lower steel plate 32 on the fixing plate 20 .

The lower steel plate 32 may be a metal plate made of the same thickness, the same length, and the same material as the upper steel plate of the SC structure. can be fixed. A support plate 34 orthogonal to the base plate 31 may be installed under the base plate 31 inside the lower steel plate 32 .

A plurality of holes corresponding to the steel rod 33 are located in the base plate 31 , and after the upper end of the steel rod 33 penetrates the base plate 31 , it is attached to the base plate 31 by a fastening means such as a nut. It can be fixedly coupled. As such, the base plate 31 is coupled to the fixing plate 20 by a plurality of steel rods 33 , and the pair of lower steel plates 32 are integrally fixed to the fixing plate 20 .

Since there is no interference with other components when installing the above-described joint 30, construction is easy. And since the lower steel plate 32 does not come into contact with the first concrete 11 during loading, it is possible to prevent damage to the first concrete 11 .

7 is a configuration diagram illustrating a fourth step of the joining method of the first embodiment shown in FIG. 1 , and shows the finally completed joint structure of the first embodiment.

Referring to FIG. 7 , in the fourth step ( S40 ), the SC structure 40 includes a pair of upper steel plates 41 and a second concrete 42 filled between the pair of upper steel plates 41 . . In the method of manufacturing the SC structure 40 , a pair of upper steel plates 41 are loaded on a pair of lower steel plates 32 , the upper steel plate 41 and the lower steel plate 32 are connected, and the pair of upper steel plates 32 are connected. It may include the steps of pouring concrete between the steel plates (41).

In this case, a connection part 43 for overlapping with the upper end of the lower steel plate 32 may be positioned at the lower end of the upper steel plate 41 . The connection part 43 may be formed in a shape in which the lower end of the upper steel plate 41 overlaps with the inner side of the lower steel plate 32 , bent in the shape of a giyeok (a). The upper steel plate 41 and the lower steel plate 32 may be fixed by welding at the connection part 43 .

8 to 10 are configuration diagrams showing the first modified example, the second modified example, and the third modified example of the upper steel plate and the lower steel plate shown in FIG. 7, respectively.

Referring to FIG. 8 , in the first modified example, the upper steel plate 41 and the lower steel plate 32 may be integrally coupled by a bolt 51 penetrating the connecting portion 43 and the lower steel plate 32 in the horizontal direction. have.

Referring to FIG. 9 , in the second modified example, the lower steel plate 32 has a greater thickness than the upper steel plate 41 , and the lower end of the upper steel plate 41 may be fixed on the lower steel plate 32 by welding. In Fig. 9, reference numeral 52 denotes a weld.

Referring to FIG. 10 , in the third modified example, the lower end of the upper steel plate 41 and the upper outer surface of the lower steel plate 32 may be fixed by welding, and the lower end of the upper steel plate 41 and the lower steel plate 32 . A backing plate 53 may be fixed to the upper inner surface. The upper steel plate 41 and the lower steel plate 32 may have the same thickness, and reference numeral 54 in FIG. 10 denotes a welded portion.

7 to 10 , the upper steel plate 41 and the lower steel plate 32 may be integrally coupled by welding or bolting, and in the case of welding, various welding structures may be applied. The connection structure of the upper steel plate 41 and the lower steel plate 32 is not limited to the above-described example, and various modifications are possible.

Referring back to FIG. 7 , the pair of upper steel plates 41 are integrally coupled by a plurality of tie bars 44 , and a plurality of studs 45 are positioned inside each upper steel plate 41 to provide a second The integrity with the concrete 42 is improved. Concrete poured between the pair of upper steel plates 41 flows down into the joint 30 to fill between the pair of lower steel plates 32, and fills the opening 22 (see FIG. 4) of the fixing plate 20. It is integrated with the first concrete 11 by contacting the first concrete 11 under the opening 22 .

As such, the second concrete 42 of the SC structure 40 fills the inside of the joint 30 and is integrated with the first concrete 11 at the same time, so the SC structure 40 and the joint 30 and the RC structure 10 improve the bonding performance of

The joint structure 100 manufactured by the method of the first embodiment is largely composed of three regions: the RC structure 10 , the fixing plate 20 - the joint 30 structure, and the SC structure 40 . The fixing plate 20 positioned between the RC structure 10 and the SC structure 40 firmly fixes the junction 30 and the SC structure 40 thereon on the RC structure 10, and as a result, the joint structure The structural stability of (100) is increased, and the conduction of the SC structure (40) is prevented.

In addition, since the upper/lower steel plates 41 and 32 do not come into contact with the first concrete 11 by the fixing plate 20 , it is possible to prevent damage to the first concrete 11 due to impact when the steel plate is loaded. The joint method of the first embodiment is easier to construct compared to the conventional method of constructing the SC structure 20 directly on the RC structure 10 by using the fixing plate 20 and the joint 30 .

11 is a flowchart illustrating a joining method according to a second embodiment of the present invention.

Referring to FIG. 11 , the joint method according to the second embodiment includes a fifth step (S50) of manufacturing an RC structure in which a joint of vertical reinforcing bars protrude above the first concrete, and a fixing plate in which a joint is fitted in addition to the RC structure. A sixth step (S60) of fixed installation, a seventh step (S70) of fixing and installing a joint made of a base plate and a pair of lower steel plates on a fixing plate, and an eighth step (S80) of installing an SC structure on the joint includes

12 is a block diagram showing a fifth step of the joining method of the second embodiment shown in FIG. 11 .

Referring to FIG. 12 , in the fifth step ( S50 ), the RC structure 10 includes a first concrete 11 , a horizontal reinforcing bar 12 , and a vertical reinforcing bar 13 . The vertical reinforcing bar 13 includes a buried part 131 embedded in the first concrete 11 and a joint 132 protruding above the first concrete 11 . The length of the joint 132 is the same as or similar to the length of the steel bar of the first embodiment.

13 is a block diagram showing a sixth step of the joining method of the second embodiment shown in FIG. 11 , and FIG. 14 is a plan view of the fixing plate shown in FIG. 13 .

12 to 14, in the sixth step (S60), the fixing plate 20 is made of a metal plate of a certain thickness, and the fixing plate 20 has an opening 22 for exposing the first concrete 11 and , a plurality of through-holes 23 corresponding to the joint 132 are positioned. The fixing plate 20 is disposed on the first concrete 11 , and at this time, the joint 132 passes through the fixing plate 20 through the through hole 23 . The fixing plate 20 enables sophisticated construction error management of reinforcing bars by fixing the joint 132 of the RC structure 10 .

15 is a block diagram illustrating a seventh step of the joining method of the second embodiment shown in FIG. 11 .

Referring to FIG. 15 , the bonding part 30 is fixedly installed on the fixing plate 20 in the seventh step ( S70 ). The joint 30 is composed of a pair of lower steel plates 32 having a base plate 31 and a support plate 34 fixed therein, and the base plate 31 has a plurality of holes corresponding to the joint 132 ( not shown) is located.

In the method of installing the joint 30, the joint 30 is disposed on the fixing plate 20 so that the upper end of the joint 132 passes through the base plate 31, and the joint part ( It may include steps of fixing the 132 to the base plate 31 and fixing the lower end of the lower steel plate 32 on the fixing plate 20 .

16 is a block diagram showing an eighth step of the joining method of the second embodiment shown in FIG. 11, and shows the finally completed joint structure of the second embodiment.

16, in the eighth step (S80), a pair of upper steel plates 41 are loaded on the joint 30, and the upper steel plate 41 and the lower steel plate 32 are fixed by welding or bolting. , Concrete is poured between the pair of upper steel plates 41 . The upper steel plate 41 and the lower steel plate 32 may be coupled by any one of the coupling methods shown in FIGS. 7 to 10 . Although FIG. 16 shows the coupling structure as in FIG. 7 , the coupling structure thereof is not limited to the illustrated example.

The second concrete 42 fills the opening 22 (see Fig. 14) of the fixing plate 20 and between the pair of upper steel plates 41 and inside the joint 30 and the first concrete below the opening 22. In contact with (11), it is integrated with the first concrete (11). The SC structure 40 is completed on the junction part 30 through the eighth step (S80).

In the joint structure 200 of the second embodiment, the fixing plate 20 has a plurality of through-holes 23 instead of the coupler, the joint 132 of the vertical reinforcing bar 32 replaces the steel rod, and the joint 132 ) has the same or similar configuration to the above-described first embodiment except for the structure for coupling the fixing plate 20 and the base plate 31 .

According to the jointing method of the first and second embodiments, the height of the joint 30 is about 1 meter and there is no interference with other components during the construction of the joint 30, so it is easy to construct in the field. And as the fixing plate 20 firmly fixes the junction 30 and the SC structure 40 thereon on the RC structure 10, it is possible to increase the structural stability of the joint structures 100 and 200, It is possible to prevent the SC structure 40 from being overturned. In addition, since the upper/lower steel plates 41 and 32 do not come into contact with the first concrete 11 , it is possible to prevent damage to the first concrete 41 by the upper/lower steel plates 41 and 32 .

Although preferred embodiments of the present invention have been described above, the present invention is not limited thereto, and various modifications can be made within the scope of the claims, the detailed description of the invention, and the accompanying drawings, and this is also the present invention. It is natural to fall within the scope of

100, 200: joint structure 10: RC structure
11: first concrete 12: horizontal reinforcing bar
13: vertical reinforcing bar 131: buried part
132: joint 20: fixing plate
21: coupler 22: opening
23: through hole 30: junction
31: base plate 32: lower steel plate
33: steel bar 34: support plate
40: SC structure 41: upper steel plate
42: second concrete 43: connection part

Claims (13)

RC structure manufacturing step of manufacturing a reinforced concrete (RC) structure including a first concrete and horizontal reinforcing bars and vertical reinforcing bars;
A fixing plate having a coupler corresponding to the vertical reinforcement is prepared, the fixing plate is disposed on the first concrete, and the upper end of the vertical reinforcement is coupled to the lower side of the coupler to combine the vertical reinforcement and the fixing plate plate installation stage;
The lower end of the steel bar is coupled to the upper side of the coupler, a pair of lower steel plates having a base plate fixed therein are disposed on the fixing plate, and the upper end of the steel bar is fastened to the base plate to connect the fixing plate and the base plate a joint installation step of bonding and fixing a pair of lower steel plates to the fixing plate by any one of welding and bolting; and
Reinforced concrete and steel plate concrete comprising a SC structure manufacturing step of fixing a pair of upper steel plates on the pair of lower steel plates, and pouring second concrete between the pair of upper steel plates to produce a steel plate concrete (SC) structure seam method. delete delete delete delete According to claim 1,
At the lower end of the pair of upper steel plates, a giyeokja-shaped connecting portion for overlapping with the pair of lower steel plates is located,
In the SC structure manufacturing step, the pair of upper steel plates and the pair of lower steel plates are fixed by welding or bolting at the connection part. According to claim 1,
The pair of lower steel plates has a greater thickness than the pair of upper steel plates,
In the SC structure manufacturing step, a joint method of reinforced concrete and steel plate concrete in which the lower end of the upper steel plate is fixed on the lower steel plate by welding. According to claim 1,
In the SC structure manufacturing step, the lower end of the upper steel plate and the upper surface of the lower steel plate are fixed by welding, and the lower end of the upper steel plate and the backing plate are fixed to opposite surfaces of the lower steel plate. Reinforced concrete and steel plate concrete seam method. According to claim 1,
An opening exposing the first concrete is located in the fixing plate,
In the SC structure manufacturing step, the second concrete is integrated with the first concrete by filling the opening of the fixing plate and between the pair of upper substrates and the junction. In the joint structure of reinforced concrete and steel plate concrete manufactured by the method of claim 1,
Reinforced concrete (RC) structure comprising a first concrete and horizontal reinforcement and vertical reinforcement;
a fixing plate coupled to the vertical reinforcing bar by a coupler and fixed on the first concrete;
a joint portion including a pair of lower steel plates fixed on the fixing plate, and a base plate positioned inside each of the pair of lower steel plates and coupled to the fixing plate by a steel rod; and
It includes a steel plate concrete (SC) structure comprising a pair of upper steel plates fixed on the pair of lower steel plates, and a second concrete filled between the pair of upper steel plates and inside the joint,
Both ends of the steel bar are joint structures of reinforced concrete and steel plate concrete that are coupled to the upper side of the coupler and the base plate. delete delete 11. The method of claim 10,
An opening exposing the first concrete is located in the fixing plate,
The second concrete is a joint structure of reinforced concrete and steel plate concrete that is integrated with the first concrete by contacting the first concrete through the opening.

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