KR20230122413A - High Performance Concrete connector for modular unit - Google Patents

Abstract

The present invention is for joining vertical members and horizontal members in a modular unit, and relates to an HPC joint for a modular unit that is composed of high-performance concrete blocks and has excellent assembly and is economical while securing structural performance.
The present invention is a modular unit consisting of vertical members provided to be spaced apart from each other at four corners and horizontal members provided between the upper and lower ends of adjacent vertical members, respectively, for modular unit bonding for joining the vertical members and horizontal members. Regarding the sphere, the joint for the modular unit is characterized in that it is formed of a high-performance concrete block.

Description

HPC connector for modular unit {High Performance Concrete connector for modular unit}

The present invention is for joining vertical members and horizontal members in a modular unit, and relates to an HPC joint for a modular unit that is composed of high-performance concrete blocks and has excellent assembly and is economical while securing structural performance.

The modular structure is a structural system that is completed by stacking and assembling box-shaped prefabricated modular units at the site, up and down, left and right, unlike existing buildings in which members are assembled or constructed on site.

In this modular system, processes such as various interior and exterior materials, mechanical facilities, and electrical wiring, as well as the frame frame, are mostly performed in factories. Therefore, it is possible to secure excellent quality, and the construction period can be greatly shortened by minimizing the on-site process.

In particular, since the plane of each household floor in an apartment building remains the same, it is possible to repeatedly construct each floor by using a large formwork such as a gang form.

On the other hand, the roof top floor has a different planar shape from the lower units, making it difficult to construct using large formwork. Therefore, it is mainly constructed by RC method by conventional formwork, but it is difficult to secure uniform quality in this conventional method. In addition, since the rooftop floor is constructed at the time of completion of the frame construction, it is difficult to construct due to the limited supply of on-site manpower and the use of equipment such as tower cranes. Accordingly, the demand for modular systems is increasing.

A modular unit constituting a modular system is usually composed of a hexahedron, and vertical members are provided at each corner, and upper and lower ends of the vertical members are connected with horizontal members.

In the conventional modular unit, vertical members and horizontal members are mainly joined by welding during factory production (Patent Nos. 10-0923637 and 10-1031299, etc.).

However, in this case, there is concern about quality deterioration, productivity is low, and there is a limit to automated production. In addition, since each member must be cut during welding and disassembly, disassembly is cumbersome and material recycling is difficult. In addition, if a length error occurs during member cutting, there is a limit that is difficult to correct.

In addition, in Patent Registration No. 10-1628092, a steel corner block is used to join a column and a beam member. However, since the above technology welds the column and beam members to the corner block, productivity is low. In addition, since the steel block is manufactured by casting, the manufacturing cost is high, and a large amount of steel is required, resulting in low economic feasibility, and it is cumbersome to separately perform fireproof treatment.

In order to solve the above problems, the present invention is to join vertical members and horizontal members in a modular unit, and to provide an HPC joint for a modular unit that is excellent in assembly and economical while securing structural performance.

The present invention according to a preferred embodiment is a modular unit composed of vertical members provided to be spaced apart from each other at four corners and horizontal members provided between the upper and lower ends of neighboring vertical members, respectively, to join the vertical members and horizontal members. It relates to a joint for a modular unit for, wherein the joint for the modular unit provides an HPC joint for a modular unit, characterized in that formed of a high-performance concrete block.

In accordance with another preferred embodiment of the present invention, the joint is inserted into the end of the horizontal member by protruding from the main body block, the vertical connecting portion protruding to the upper or lower surface of the body block and inserted into the end of the vertical member, and the side of the body block. It provides an HPC junction for a modular unit, characterized in that consisting of a horizontal connection portion to be coupled.

In the present invention according to another preferred embodiment, an insert nut is embedded in the side surface of the vertical connection part and the upper and lower surfaces of the horizontal connection part, respectively, and a coupling bolt penetrating the vertical member and the horizontal member is fastened to the insert nut to form a vertical member and a horizontal member. It provides an HPC joint for a modular unit, characterized in that fixed to the joint.

The present invention according to another preferred embodiment is an HPC joint for a modular unit, characterized in that a connection plate is fixedly coupled to the upper surface of the body block side of the horizontal connection part, and the upper flange of the horizontal member is welded to the end of the connection plate. provide a sphere

The present invention according to another preferred embodiment provides an HPC joint for a modular unit, characterized in that a welding wire mesh is provided inside the joint.

The present invention according to another preferred embodiment is characterized in that a guide pin protrudes from the upper surface of the convex body of the joint located on the upper portion of the vertical member, and an insertion hole is formed on the lower surface of the body block of the joint located at the lower portion of the vertical member. Provides an HPC joint for a modular unit to be.

The present invention according to another preferred embodiment provides an HPC junction for a modular unit, characterized in that a hollow portion communicating with the insertion hole and the outer surface of one side of the body block is formed inside the body block.

According to the present invention, it is for joining vertical members and horizontal members in a modular unit, and it is possible to provide an HPC joint for a modular unit that is composed of high-performance concrete blocks and can secure structural performance.

According to the present invention, it is easy to manufacture because it can be formed into desired dimensions and shapes by plastic mold, etc., it is convenient to assemble because it does not require a welding process, and it is possible to greatly reduce manufacturing costs compared to steel materials, so it is economical for HPC bonding for modular units. phrase can be provided.

1 is a perspective view showing a modular unit;
Figure 2 is a perspective view showing a junction between a vertical member and a horizontal member.
Figure 3 is a perspective view showing a joint.
Figure 4 is a perspective view showing a junction viewed from another direction.
Figure 5 is a perspective view showing the coupling relationship between the vertical member and the horizontal member and the joint.
Figure 6 is a perspective view showing a junction provided with a connection plate.
7 is a perspective view showing a coupling relationship between a connecting plate and a horizontal member;
8 is a perspective view showing a connecting plate;
Figure 9 is a side cross-sectional view showing an embodiment in which a welded wire mesh is disposed in a horizontal connection portion.
10 is a planar cross-sectional view showing an embodiment in which welded wire meshes are continuously disposed on both horizontal connection portions.
11 is a perspective view showing a coupling relationship between upper and lower modular units;

Hereinafter, the present invention will be described in detail according to the accompanying drawings and preferred embodiments.

Figure 1 is a perspective view showing a modular unit, Figure 2 is a perspective view showing a junction between a vertical member and a horizontal member.

The HPC junction for a modular unit of the present invention is a modular unit (1) composed of vertical members (2) provided at four corners so as to be spaced apart from each other and horizontal members (3) provided between the upper and lower ends of the neighboring vertical members (2), respectively. In ), for joining the vertical member 2 and the horizontal member 3, the modular unit joint 4 is characterized in that it is formed of a high-performance concrete block.

The present invention is for joining a vertical member (2) and a horizontal member (3) in a modular unit (1), to provide an HPC joint for a modular unit that is excellent in assembly and economical while securing structural performance.

The modular unit 1 can be used not only for rooftop structures but also for various buildings such as living homes, school facilities, various lodging facilities, officetels, and temporary disaster facilities.

The modular unit 1 is composed of four vertical members 2 and horizontal members 3 connecting upper and lower portions of the adjacent vertical members 2, respectively, and can be configured in a rectangular parallelepiped shape as a whole.

Joints 4 are provided at each corner of the modular unit 1 so that ends of the vertical member 2 and the horizontal member 3 are joined to each other.

The joint 4 is formed of a high performance concrete (HPC) concrete block.

High-performance concrete is a concrete with high strength, high durability, and high fluidity. Its compressive strength and tensile strength are far superior to ordinary concrete, so it has excellent structural performance and good fluidity, so it has excellent formability.

The high-performance concrete block preferably has a compressive strength of 90 MPa or more and a tensile strength of 6 MPa or more.

The high performance concrete includes ultra high performance concrete (UHPC).

The joint 4 may be manufactured using a plastic mold or the like. Accordingly, it is easier to manufacture than conventional steel blocks, and the manufacturing cost can be greatly reduced.

In addition, the joint 4 does not require a separate fireproof treatment, and a welding process is unnecessary, so construction is convenient.

Figure 3 is a perspective view showing a joint, Figure 4 is a perspective view showing a joint viewed from another direction, Figure 5 is a perspective view showing the coupling relationship between the vertical member and the horizontal member and the joint.

As shown in FIGS. 3 to 5, the joint 4 is a body block 41, a vertical connection portion protruding from the upper or lower surface of the body block 41 and inserted into the end of the vertical member 2. (42) and a horizontal connection portion (43) that protrudes to the side of the body block (41) and is inserted into and coupled to the end of the horizontal member (3).

In order to couple the vertical member 2 and the horizontal member 3 to the joint 4, the joint 4 may be composed of a body block 41, a vertical connection portion 42, and a horizontal connection portion 43. .

The vertical connecting portion 42 and the horizontal connecting portion 43 may be integrally formed with the body block 41, respectively, and may be formed to protrude to one side of the body block 41.

In the junction hole 4 provided at the corner of the modular unit 1, a pair of horizontal connection parts 43 may protrude in directions orthogonal to each other on a plane (FIG. 5).

The vertical connecting portion 42 may protrude from the upper surface of the body block 41 in the case of the joint 4 located at the bottom. In addition, in the case of the joint 4 located at the top, a vertical connection portion 42 may be protruded from the lower surface of the body block 41.

In order to couple the vertical member 2 and the horizontal member 3 to the vertical connecting portion 42 and the horizontal connecting portion 43, respectively, the vertical connecting portion 42 and the horizontal connecting portion 43 are the vertical member 2 and the horizontal member, respectively. It can be formed in a shape corresponding to the inside of the cross section of (3).

Accordingly, the vertical connecting portion 42 and the horizontal connecting portion 43 may be inserted inside the ends of the vertical member 2 and the horizontal member 3, respectively.

To this end, the vertical member 2 may be composed of a steel pipe.

In addition, the horizontal member 3 may be formed of a c-shaped steel composed of upper and lower flanges 31 and 32 and a web 33.

As shown in FIGS. 4 and 5, insert nuts 44 are embedded in the side surface of the vertical connection part 42 and the upper and lower surfaces of the horizontal connection part 43, respectively, and the vertical member 2 and the horizontal member 3 The coupling bolt 5 passing through is fastened to the insert nut 44 so that the vertical member 2 and the horizontal member 3 can be fixed to the joint 4.

In order to fix the vertical member 2 and the horizontal member 3 to the vertical connection part 42 and the horizontal connection part 43, respectively, the insert nut 44 may be embedded in the junction hole 4.

At this time, in the case of the vertical connection part 42, the insert nut 44 may be buried in each side of the vertical connection part 42.

In the case of the horizontal connection part 43, insert nuts 44 may be installed on the upper and lower surfaces, respectively, in order to transmit the bending of the horizontal member 3.

A through hole H may be formed in the vertical member 2 and the horizontal member 3 at a position corresponding to the position of the insert nut 44 .

By inserting the coupling bolt 5 through the through hole H and fastening it to the insert nut 44, the vertical member 2 and the horizontal member 3 are connected to the vertical connection part 42 and the horizontal connection part 43, respectively. can be fixed

Since the joint 4 is formed of high-performance concrete with excellent formability, the insert nut 44 can be easily embedded therein.

Since the insert nut 44 is pre-embedded in the side surface of the vertical connection part 42 and the upper and lower surfaces of the horizontal connection part 43, the coupling bolt 5 can be easily fastened in one direction.

Figure 6 is a perspective view showing a joint provided with a connection plate, Figure 7 is a perspective view showing the coupling relationship between the connection plate and the horizontal member, Figure 8 is a perspective view showing the connection plate.

As shown in FIGS. 6 and 7, a connection plate 45 is fixedly coupled to the upper surface of the body block 41 side of the horizontal connection part 43, and the upper flange 31 of the horizontal member 3 is It may be welded to the end of the connecting plate 45.

A connection plate 45 may be fixedly installed on the upper surface of the horizontal connection part 43 to transmit the negative moment of the end of the horizontal member 3.

The connection plate 45 is formed of a strip-shaped steel plate and may be provided on the inner end of the horizontal connection part 43, that is, on the upper surface of the body block 41 side.

A plurality of stud bolts 451 may be provided on the lower surface of the connecting plate 45 so that the connecting plate 45 is firmly fixed to the inside of the horizontal connecting portion 43 (FIGS. 6 and 8).

The horizontal member 3 coupled to the horizontal connecting portion 43 may be integrated by combining the end of the upper flange 31 with the connecting plate 45 by welding (W).

The connection plate 45 may be configured to have a different thickness from the upper flange 31 of the horizontal member 3, and may be joined by fillet welding so that the welded teeth are filled in the resulting stepped portion.

9 is a side cross-sectional view showing an embodiment in which welded wire meshes are disposed on horizontal connection parts, and FIG. 10 is a plan view showing an embodiment in which welded wire meshes are continuously disposed on both horizontal connection parts.

As shown in FIGS. 9 and 10 , a welding wire mesh 46 may be provided inside the joint 4 .

The horizontal connection part 43 protruding from the body block 41 of the junction part 4 is a member with a large dance compared to its length, and can be designed by a strut tie model.

The strut tie model is a reasonable design method for concrete structural members with complex stress flow due to geometric shapes.

Accordingly, the horizontal connection part 43 can be modeled as a strut (S: strut) inclined downward with respect to the load of the horizontal member (3) and a tie (T: tie) provided in the horizontal direction from the top to the body block 41 side there is. Since the joint 4 is formed of high-performance concrete having a very high compressive strength, the concrete itself can sufficiently serve as the strut S.

However, even though the tensile strength of high-performance concrete is much greater than that of ordinary concrete, a separate tension member is required for the tie (T) part.

To this end, a welded wire mesh 46 may be disposed inside the joint 4 to serve as a tie T.

The welded wire mesh 46 is provided on the upper side of the inside of the horizontal connection part 43 and may be arranged to extend into the body block 41 (FIG. 9).

In addition, in order to reinforce the right angles of the horizontal connection parts 43 orthogonal to each other, the welded wire mesh 46 may be arranged in a diagonal direction to cross the adjacent horizontal connection parts 43 (FIG. 10).

Accordingly, it is possible to secure performance optimized for stress.

The welded wire mesh 46 is a concept including a welded wire mesh.

11 is a perspective view showing a coupling relationship between upper and lower modular units.

As shown in FIG. 11, a guide pin 411 protrudes from the upper surface of the body convex 41 of the joint 4 located on the upper part of the vertical member 2, and the lower part of the vertical member 2 An insertion hole 412 may be formed on the lower surface of the main body block 41 of the joint 4 located at.

When the upper and lower modular units 1 and 1' are stacked vertically, the modular unit 1' installed on the upper part must be installed in the upper part of the modular unit 1 previously installed on the lower part. To this end, a guide pin 411 may be provided in the joint 4 of the upper portion of the vertical member 2, and an insertion hole 412 may be formed in the joint 4 of the lower portion.

Therefore, the guide pin 411 protruding from the upper part of the lower modular unit 1 is inserted into the insertion hole 412 formed at the lower part of the upper modular unit 1' so that the upper and lower modular units 1 and 1' can be coupled. there is.

The guide pin 411 may be formed to be tapered so that the guide pin 411 becomes narrower toward the top so that the guide pin 411 easily enters and is inserted into the insertion hole 412 .

The guide pin 411 and the insertion hole 412 are for temporarily fixing the position of the stacked modular units 1 and 1', and the upper and lower modular units 1 and 1' are mutually coupled to the horizontal member 3 can be finally fixed.

A hollow part 413 communicating with the insertion hole 412 and an outer surface of one side of the body block 41 may be formed inside the body block 41 .

The guide pin 411 and the insertion hole 412 guide the positioning of the modular unit 1' to be stacked on the top and temporarily fix the upper and lower modular units 1 and 1'. At this time, when the guide pin 411 is fixed inside the insertion hole 412, the guide pin 411 serves as a dowel bar, thereby structurally integrating against lateral force at the junction of the upper and lower modular units 1 and 1' to resist can do.

To this end, a hollow part 413 communicating with the insertion hole 412 may be formed inside the body block 41, and the hollow part 413 may be configured to be open to the outer surface of the body block 41.

Accordingly, after laminating construction is performed so that the guide pin 411 of the lower modular unit 1 is inserted into the insertion hole 412 of the upper modular unit 1', the hollow part 413 and the insertion hole 412 are free. The guide pin 411 may be fixed inside the insertion hole 412 by injecting shrinkage mortar or the like.

In order to use the guide pin 411 as a dowel bar, it is necessary to secure a sufficient fixation length. Therefore, the guide pin 411 can be configured to extend to the inside of the hollow part 413 by lengthening the length.

On the other hand, for the floor slab construction of the modular units (1, 1'), concrete may be poured after installing a formwork or deck plate between the lower horizontal members (3). At this time, it is preferable that the hollow part 413 is formed so that the side between the adjacent horizontal connection parts 43 is open so that simultaneous pouring into the hollow part 413 and the insertion hole 412 is possible.

1: modular unit
2: vertical member
3: horizontal member
31: upper flange
32: lower flange
33: web
4: junction
41: body block
411: guide pin
412: insertion hole
413: hollow part
42: vertical connection
43: horizontal connection
44: insert nut
45: connection plate
451: stud bolt
46: welded wire mesh
5: coupling bolt
H: through hole
S: strut
T: tie
W: welding

Claims (7)

In the modular unit 1 composed of vertical members 2 provided at four corners to be spaced apart from each other and horizontal members 3 provided between the upper and lower ends of the adjacent vertical members 2, the vertical members 2 ) and a modular unit joint (4) for joining the horizontal member (3),
The modular unit joint (4) is an HPC joint for a modular unit, characterized in that formed of a high-performance concrete block.
In paragraph 1,
The joint 4 is a body block 41, a vertical connection portion 42 protruding to the upper or lower surface of the body block 41 and inserted into the end of the vertical member 2, and the body block 41 HPC joint for a modular unit, characterized in that consisting of a horizontal connection portion 43 protruding to the side and inserted into the end of the horizontal member (3).
In paragraph 2,
Insert nuts 44 are embedded in the side surface of the vertical connection part 42 and the upper and lower surfaces of the horizontal connection part 43, respectively, and the coupling bolt 5 penetrating the vertical member 2 and the horizontal member 3 is the insert It is fastened to the nut 44, the vertical member (2) and the horizontal member (3) HPC joint for the modular unit, characterized in that fixed to the joint (4).
In paragraph 2,
A connection plate 45 is fixedly coupled to the upper surface of the body block 41 side of the horizontal connection part 43, and the upper flange 31 of the horizontal member 3 is welded to the end of the connection plate 45 HPC junction for modular units, characterized in that.
In paragraph 1,
HPC joint for a modular unit, characterized in that the inside of the joint (4) is provided with a welding wire mesh (46).
In paragraph 2,
A guide pin 411 protrudes from the upper surface of the body convex 41 of the joint 4 positioned on the upper portion of the vertical member 2, and the joint 4 positioned below the vertical member 2 HPC joint for a modular unit, characterized in that the insertion hole 412 is formed on the lower surface of the body block 41 of the.
In paragraph 6,
HPC joint for a modular unit, characterized in that the insertion hole 412 and the hollow part 413 communicating with the outer surface of one side of the body block 41 is formed inside the body block 41.

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