KR102612044B1 - 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 ensures structural performance, has excellent assembly properties, and is economical.
The present invention is a modular unit consisting of a vertical member provided at the four corners to be spaced apart from each other and a horizontal member which is a U-shaped steel provided between the top and bottom of the neighboring vertical member, and a modular unit for joining the vertical member and the horizontal member. Regarding a joint for a unit, the joint for a modular unit is formed of a high-performance concrete block and includes a body block, a vertical connector that protrudes from the upper or lower surface of the body block and is inserted and coupled to the end of a vertical member, and a side of the body block. It consists of a horizontal connection part that protrudes and is inserted and coupled to the end of the horizontal member. A connection plate, which is a strip-shaped steel plate, is fixedly coupled to the upper surface of the horizontal connection part on the main body block side, and a plurality of connection plates are fixed to the inside of the horizontal connection part to the lower surface of the connection plate. Stud bolts are provided so that the upper flange of the horizontal member is welded to the end of the connection plate.

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 ensures structural performance, has excellent assembly properties, and is economical.

Unlike existing buildings where assembly or construction of members is performed on site, a modular structure is a structural system that is completed by stacking and assembling modular units pre-manufactured in a box-type factory at the site, up, down, left and right.

In this modular system, most of the processes such as the structural frame, various interior and exterior materials, mechanical equipment, and electrical wiring are carried out in the factory. Therefore, it is possible to secure excellent quality and significantly shorten the construction period by minimizing field processes.

In particular, since the floor plan of each household floor in an apartment complex is maintained the same, repeated construction on each floor is possible using large forms such as gang form.

On the other hand, the rooftop floor has a different plan shape from the lower unit, making construction using large forms difficult. Accordingly, it is mainly constructed using the RC method using conventional formwork, but it is difficult to secure uniform quality with this conventional method. In addition, since the rooftop floor is constructed at the end of the frame construction, the supply of on-site manpower and the use of equipment such as tower cranes are limited, making construction difficult. Accordingly, demand for modular systems is increasing.

The modular unit that makes up the modular system is usually made of a hexahedron and has vertical members at each corner, and the top and bottom of the vertical members are connected by horizontal members.

Conventional modular units were manufactured in factories by mainly joining vertical members and horizontal members by welding (Patent Nos. 10-0923637, 10-1031299, etc.).

However, in this case, there is a risk of quality deterioration, productivity is low, and there are limits to automated production. In addition, since each member must be cut during welding, joining and disassembly, dismantling is cumbersome and recycling of materials is difficult. In addition, if a length error occurs when cutting a member, there is a limitation that it is difficult to correct.

In addition, in Registered Patent No. 10-1628092, steel corner blocks are used to join columns and beam members. However, this technology has low productivity because it welds column and beam members to corner blocks. In addition, since steel blocks are manufactured by casting, the manufacturing cost is high, a large amount of steel is required, which reduces economic efficiency, and there is the inconvenience of having to separately fireproof treatment.

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

The present invention according to a preferred embodiment is a modular unit consisting of a vertical member provided at the four corners to be spaced apart from each other and a horizontal member, which is a U-shaped steel, provided between the upper and lower ends of the adjacent vertical members, wherein the vertical member and the horizontal member It relates to a connector for a modular unit for joining, wherein the connector for the modular unit is formed of a high-performance concrete block and includes a main body block, a vertical connection part that protrudes from the upper or lower surface of the main body block and is inserted and coupled to the end of a vertical member, and the It consists of a horizontal connection part that protrudes from the side of the main body block and is inserted and coupled to the end of the horizontal member. A connection plate, which is a strip-shaped steel plate, is fixedly coupled to the upper surface of the horizontal connection part on the side of the main body block, and the inner side of the horizontal connection part is attached to the lower surface of the connection plate. Provides an HPC joint for a modular unit, wherein a plurality of stud bolts are provided and the upper flange of the horizontal member is welded to the end of the connection plate.

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

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

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

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

According to the present invention, it is possible to provide an HPC joint for a modular unit that is designed to join vertical members and horizontal members in a modular unit and is made of high-performance concrete blocks to ensure structural performance.

According to the present invention, it is easy to manufacture because it can be formed into the desired size and shape using a plastic mold, etc., it is convenient to assemble because it does not require a welding process, and the manufacturing cost can be greatly reduced compared to steel, making it economical HPC bonding for modular units. A phrase can be provided.

1 is a perspective view showing a modular unit.
Figure 2 is a perspective view showing a joint between a vertical member and a horizontal member.
Figure 3 is a perspective view showing a junction hole.
Figure 4 is a perspective view showing the junction seen from another direction.
Figure 5 is a perspective view showing the connection relationship between vertical members and horizontal members and joints.
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 a connection 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.
Figure 10 is a plan cross-sectional view showing an embodiment in which welded wire mesh is continuously disposed on both horizontal connection parts.
Figure 11 is a perspective view showing the coupling relationship of upper and lower modular units.

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

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

The HPC joint for a modular unit of the present invention is a modular unit consisting of a vertical member (2) provided at the four corners to be spaced apart from each other and a horizontal member (3), which is a U-shaped steel, provided between the upper and lower ends of the adjacent vertical members (2). In the unit 1, the joint 4 for the modular unit is used to join the vertical member 2 and the horizontal member 3, and is characterized in that it is formed of a high-performance concrete block.

The present invention is intended to join the vertical member (2) and the horizontal member (3) in the modular unit (1), and to provide an HPC joint for the modular unit that secures structural performance, has excellent assembly properties, and is economical.

The modular unit (1) can be used in various buildings such as residential houses, school facilities, various lodging facilities, officetels, and temporary disaster facilities as well as rooftop structures.

The modular unit 1 is composed of four vertical members 2 and a horizontal member 3 that connects the upper and lower parts of the adjacent vertical members 2, respectively, and can be configured as an overall rectangular parallelepiped.

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

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

High-performance concrete is a concrete that has high strength, high durability, and high fluidity. It has superior structural performance as it has superior compressive strength and tensile strength compared to ordinary concrete, and has excellent formability due to its good fluidity.

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 can be manufactured using a plastic mold or the like. As a result, it is easier to manufacture than existing steel blocks, and manufacturing costs can be significantly reduced.

In addition, the joint 4 does not require separate fire resistance treatment and does not require a welding process, making construction convenient.

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

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

The vertical connection portion 42 and the horizontal connection portion 43 may each be formed integrally with the body block 41 and may be formed to protrude from one side of the body block 41.

The joint 4 provided at the corner of the modular unit 1 may have a pair of horizontal connecting portions 43 protruding in directions perpendicular to each other on a plane (FIG. 5).

The vertical connecting portion 42 may be formed to protrude from the upper surface of the main body block 41 in the case of the joint 4 located at the lower portion. Additionally, in the case of the joint 4 located at the top, a vertical connection portion 42 may be formed to protrude from the lower surface of the main body block 41.

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

Accordingly, the vertical connection part 42 and the horizontal connection part 43 can be inserted inside the ends of the vertical member 2 and the horizontal member 3, respectively.

For this purpose, the vertical member 2 may be made of a steel pipe.

And the horizontal member 3 may be composed of a U-beam consisting of upper and lower flanges 31 and 32 and a web 33.

As shown in Figures 4 and 5, insert nuts 44 are embedded in the side surfaces 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 A coupling bolt (5) penetrating 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, an insert nut 44 can be embedded in the joint 4.

At this time, in the case of the vertical connection part 42, an insert nut 44 can be embedded in each side of the vertical connection part 42.

In the case of the horizontal connection part 43, insert nuts 44 can be installed embedded in the upper and lower surfaces, respectively, 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. It can be fixed.

Since the joint 4 is made 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 a connection relationship between a connection plate and a horizontal member, and Figure 8 is a perspective view showing a connection plate.

As shown in FIGS. 6 and 7, a connecting plate 45, which is a strip-shaped steel plate, is fixedly coupled to the upper surface of the horizontal connecting portion 43 on the side of the main body block 41, and a horizontal connecting portion is attached to the lower surface of the connecting plate 45. A plurality of stud bolts 451 fixed to the inside of (43) are provided, so that the upper flange 31 of the horizontal member 3 can be welded to the end of the connection plate 45.

In order to transmit the negative moment of the end of the horizontal member (3), a connection plate (45) can be fixedly installed on the upper surface of the horizontal connection part (43).

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

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

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

The connection plate 45 can be configured to have a different thickness from the upper flange 31 of the horizontal member 3, and can be joined by fillet welding so that the resulting step is filled with weld joints.

FIG. 9 is a side cross-sectional view showing an embodiment in which welded wire mesh is disposed in a horizontal connection portion, and FIG. 10 is a plan cross-sectional view showing an embodiment in which welded wire mesh is continuously disposed in both horizontal connection portions.

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

The horizontal connecting portion 43 protruding from the main body block 41 of the joint 4 is a member whose length is large compared to its length, and can be designed using a strut tie model.

The strut tie model is a reasonable design method for concrete structural members with complex stress flows due to their geometry.

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 upper side toward the main body block 41. there is. Since the joint 4 is made of high-performance concrete with very high compressive strength, the concrete itself can sufficiently play the role of the strut S.

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

For this purpose, a welded wire mesh 46 can be placed inside the joint 4 to serve as a tie T.

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

In addition, in order to reinforce the right angles of the horizontal connection parts 43 that are orthogonal to each other, welded wire mesh 46 may be arranged diagonally across neighboring horizontal connection parts 43 (FIG. 10).

Accordingly, performance optimized for stress can be secured.

The welded wire mesh 46 is a concept that includes a welded steel bar mesh.

Figure 11 is a perspective view showing the coupling relationship of upper and lower modular units.

As shown in FIG. 11, a guide pin 411 is formed to protrude on the upper surface of the body convex 41 of the joint 4 located at 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 in .

When constructing the upper and lower modular units (1, 1') by stacking them up and down, the modular unit (1') installed at the upper part must be able to be installed at the upper position of the modular unit (1) already installed at the lower part. For this purpose, a guide pin 411 may be provided in the joint 4 at the top of the vertical member 2, and an insertion hole 412 may be formed in the joint 4 at the bottom.

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.

To allow the guide pin 411 to easily enter and be inserted into the insertion hole 412, the guide pin 411 may be formed to be tapered so that its width becomes narrower toward the top.

The guide pin 411 and the insertion hole 412 are for temporarily fixing the positions of the modular units 1 and 1' to be stacked, and the upper and lower modular units 1 and 1' are connected to the horizontal members 3 to each other. It can be finally fixed.

A hollow portion 413 communicating with the insertion hole 412 and the 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' constructed by stacking the upper part 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 acts as a dowel bar to structurally integrate and resist lateral force at the joint of the upper and lower modular units 1 and 1'. can do.

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

Accordingly, after laminating construction 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 guide pin 411 is inserted into the hollow portion 413 and the insertion hole 412. The guide pin 411 can 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 anchoring length. Therefore, the guide pin 411 can be configured to extend to the inside of the hollow portion 413 by increasing its length.

Meanwhile, for floor slab construction of modular units (1, 1'), formwork or deck plates, etc. can be installed between the lower horizontal members (3) and then concrete can be poured. At this time, it is preferable that the hollow part 413 is formed so that the side between the adjacent horizontal connecting parts 43 is open so that simultaneous pouring is possible in the hollow part 413 and the insertion hole 412.

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: Ministry of Heavy Industries
42: Vertical connection
43: horizontal connection part
44: Insert nut
45: Connection plate
451: stud bolt
46: welded wire mesh
5: Combined bolt
H: Through hole
S: Strut
T: tie
W: welding

Claims (7)

In the modular unit (1) consisting of a vertical member (2) provided at four corners to be spaced apart from each other and a horizontal member (3), which is a U-shaped steel, provided between the top and bottom of the neighboring vertical member (2), the vertical member (2) It relates to a connector (4) for a modular unit for joining a member (2) and a horizontal member (3),
The connector 4 for the modular unit is formed of a high-performance concrete block and includes a body block 41, a vertical connection portion 42 that protrudes from the upper or lower surface of the body block 41 and is inserted and coupled to the end of the vertical member 2. ) and a horizontal connection portion 43 that protrudes from the side of the main body block 41 and is inserted and coupled to the end of the horizontal member 3,
A connection plate 45, which is a strip-shaped steel plate, is fixedly coupled to the upper surface of the horizontal connection part 43 on the side of the main body block 41, and a plurality of studs are fixed to the inside of the horizontal connection part 43 on the lower surface of the connection plate 45. An HPC joint for a modular unit, characterized in that a bolt 451 is provided so that the upper flange 31 of the horizontal member 3 is welded to the end of the connection plate 45.
delete In paragraph 1:
Insert nuts 44 are embedded in the side surfaces of the vertical connection part 42 and the upper and lower surfaces of the horizontal connection part 43, respectively, and a coupling bolt 5 penetrating the vertical member 2 and the horizontal member 3 is inserted into the insert. An HPC joint for a modular unit, characterized in that the vertical member (2) and the horizontal member (3) are fastened to the nut (44) and fixed to the joint (4).
delete In paragraph 1:
HPC joint for modular unit, characterized in that a welded wire mesh (46) is provided inside the joint (4).
In paragraph 1:
A guide pin 411 is formed to protrude on the upper surface of the body convex 41 of the joint 4 located at the upper part of the vertical member 2, and the joint 4 located at the lower part of the vertical member 2 HPC joint for modular unit, characterized in that an insertion hole 412 is formed on the lower surface of the main body block 41.
In paragraph 6:
HPC joint for modular unit, characterized in that the insertion hole 412 and a hollow portion 413 communicating with one outer surface of one side of the body block 41 are formed inside the body block 41.

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