KR101679666B1

KR101679666B1 - Core structure dor modular building and constructio method therefor

Info

Publication number: KR101679666B1
Application number: KR1020150149215A
Authority: KR
Inventors: 곽명근; 이상섭; 김형도; 홍성엽; 배규웅; 박금성
Original assignee: 한국건설기술연구원
Priority date: 2015-10-27
Filing date: 2015-10-27
Publication date: 2016-11-28

Abstract

The present invention relates to a core structure for a medium-and-high-rise modular building and a method of constructing the same, which can rapidly laminate construction while minimizing displacement due to lateral force generated in a core structure such as an EV shaft in a middle- A concrete panel unit in which a reinforcing assembly including a vertical reinforcing bar is embedded and a protruding connection part is formed on an upper surface of the body part in the shape of a vertical plate and a central part of the bottom surface; And a connection flange connected to the upper and lower surfaces of the protruding connection portion of both side concrete panels through a vertical reinforcing bar, the PC panel being connected to the upper, lower, left, and right sides to form a hollow square box .

Description

BACKGROUND OF THE INVENTION Field of the Invention [0001] The present invention relates to a core structure for a medium-

The present invention relates to a core structure for medium to high modular buildings and a construction method thereof. More particularly, the present invention relates to a core structure for a medium-and-high-rise modular building, which can be rapidly stacked while minimizing displacement caused by a lateral force generated in a core structure such as an EV shaft in a middle-

1A is a photograph showing a staircase installation structure of a conventional low-rise modular building.

That is, the modular building is constructed by assembling a modular structure in the form of a rectangular parallelepiped into a steel material and assembling them with each other in an upward, downward, leftward and rightward direction. In such a completed building, a separate EV room (elevator shaft) When the structure 30 is constructed as a modular structure, it is increased when the core structure is stratified (15 layers or less) due to the problem that there is no modular structure that resists the lateral force, Even if the cross section of the steel of the modular structure is increased due to the lateral force, there is a problem that the lateral displacement increases the usability.

Accordingly, in the construction of a core structure in the form of a hollow box such as an EV room (elevator shaft) extended in the vertical direction in a middle-floor modular building, a modular structure made of a steel material is not used, The construction of the concrete structure to be applied can be applied. In this case, due to the problem of the space for reinforcing steel reinforcement and concrete pouring work, the core structure should be installed first (core prior construction method) There has been a problem in that it is not possible to save the original intention of constructing a modular building as soon as the core structure is simultaneously constructed.

There is also a method of making a core structure such as an EV room (elevator shaft) extending in a vertical direction in a pre-stratified modular building by making a PC (assembling a precast wall), but a conventional method of assembling a pre- The horizontal and vertical connection structures between the cast walls are somewhat complicated to be applied to the modular building, and thus it is difficult to apply them as they are, and there is a limit in that the economical efficiency in manufacturing the precast walls is inferior.

1B shows a perspective view of the structure of a conventional precast concrete precast wall 1.

In other words, the upper and lower surfaces of the vertical wall 10 can be seen to be formed by embedding a connecting steel composed of a vertical portion 4 and a flange portion 3, And the flange portion 3 is exposed to the outside.

It can be seen that the bolt holes 5 formed in the flange portion 3 are connected between the upper and lower portions of the beam member 7 provided between the pillars 6 by using bolts / nuts 8 . As a result, it can be seen that both sides of the vertical wall are brought into contact with the inner surface of the column member 6 to perform the vibration damping function.

That is, a precast wall is additionally provided between the pillar member 6 and the beam member 7 so as to perform the anti-vibration.

However, in connecting the precast casting wall 1 directly to the upper and lower parts, the connecting steel members must be connected to each other or to be connected to the H-shaped steel frame. In the case of resisting the lateral force, only the shear force of the bolt resists, If the structure is applied to the middle stratification (less than 15 layers), there may be a limit to control the deformation of the joint due to the lateral force.

1C is an exemplary view of a conventional corner mold 20 installation.

That is, it can be seen that the precast formwork 40 is connected to each other and the side moldings 50 are closed with the finishing molds 50, while the corner molds 30 are disposed at the corner connecting portions of the precast molds 40.

However, the corner mold 30 is not a mold for corner construction of the precast wall but is a system form for constructing the precast wall itself and the corner connection with the cast-in-place concrete as a connection site form of the precast wall. It is difficult, and efficiency and economical efficiency may be deteriorated.

Accordingly, the present invention can provide a structure capable of effectively restraining the lateral force due to the construction of the middle layer while allowing the construction of the modular structure of the middle layer in the middle structure of the middle layer modular structure (continuous construction at a height of about 15 to 1 layer) So as to solve the problem of providing a quick and economical and stable core structure for modular high-rise buildings and a construction method thereof.

In order to achieve the above object,

First, in the middle-floor modular building, the core structure is vertically connected to the PC panel, and the PC panel is a reinforced concrete member. The inner reinforcing assembly (vertical reinforcing bar) extends to the connecting steel So that they are integrated with each other.

Therefore, the connecting steel beams located at the connecting part of the PC panel are simply fastened to each other by bolts and nuts so that the upper and lower parts are connected to each other, and the connecting steel pieces are separated from each other to form the connecting part concrete (protruding connecting part) So that the rigidity of the connection site is sufficiently secured.

Second, the connection part of the PC panel is formed by connecting the core structure in the form of a rectangular box body, so that a corner connection part is also formed. In the case of applying the conventional precast formwork to such a corner connection part, the workability is lowered. Therefore, the present invention uses a bending and vertical formwork for wrapping the edge part, and this bending and vertical formwork is passed through the bending and vertical formwork using the insert pre- In addition, vertical reinforcing bars were inserted into the corner space to place the concrete inside the bending vertical formwork, thereby reinforcing the corner joints, thereby making it possible to integrate the corners of the PC panel.

To this end,

And is installed so as to be simultaneously installed around the modular structure (A)

A concrete panel part in which a protruding connection part is formed at an upper surface of a vertical body and a central part of a bottom surface of the body part, and a reinforcing steel assembly including a vertical reinforcing bar is embedded; And a connection flange connected to the upper and lower surfaces of the protruding connection portion of both side concrete panels through a vertical reinforcing bar, the PC panel being connected to the upper, lower, left, and right sides to form a hollow square box The vertical reinforcing bars provide a core structure for a middle-highway modular building which penetrates the concrete panel part up and down so that both ends are connected to each other through one flange of the connecting steel to secure the structural integrity of the connecting steel and the concrete panel part do.

Also,

(a) a concrete panel part in which a reinforcing assembly including a vertical reinforcing bar is embedded in a vertical connecting part formed at a central part of an upper surface and a bottom of a vertical body part; And a connecting flange connected to the upper and lower surfaces of the protruding connection portions on both sides of the concrete panel portion so that a vertical reinforcing bar penetrates through the connecting flange.

(b) The PC panel is horizontally connected to the modular structure (A) in a transverse direction by transversely connecting one end of the PC panel with the modular structure (A) Connecting to each other using a side shear connection including a lower end continuous shear groove and a shear key;

(c) connecting the PC panels to the upper, lower, left, and right sides of the PC panel with the bolts and nuts by fastening the connecting sections formed on the bottom surface of the other PC panel to the upper surface of the PC panel connected in the transverse direction; And

(d) The edge connection reinforcing bars are set on the corner connection portions of the PC panels, and the bending and vertical formwork 200 is set in the insert formed on the concrete panel portion with the fastening bolts so that the corner connecting reinforcing bars are positioned inside. And a step of placing the concrete so that the corner connection portion is structurally secured to the upper and lower portions.

According to the present invention, it is possible to integrate the PC panel constituting the core structure structurally while solving the air and air problems caused by the construction of the core structure of the middle floor modular building by the conventional on-site installation or PC construction method, It becomes possible to construct a core structure for a building.

In addition, the PC panel can be connected by bolts and nuts only with the bolts and nuts. However, the PC panel is advantageous in the lateral force resistance due to the connection concrete in the connection area, thereby increasing the lateral force resistance effect.

In addition, since the corner connection portion of the PC panel is not large in the space for inserting the concrete, the corners of the PC panel are integrated with each other using the spotted concrete, but the concrete can be easily poured using the bending and vertical form, .

More specifically

According to the present invention, the workability of the core structure (A1) can be sufficiently secured, while the vertical and horizontal construction (longitudinal and lateral) precision is improved and structural integrity is secured by minimizing the wet processing while maintaining the advantages of the dry method can do. In addition, it is possible to construct the PC panel assembly quickly because of the simplification of the connection site construction using the connecting steel, and it is possible to secure the upper and lower structural integrity due to the concrete pouring and curing at the edge connection, And it is possible to make the bolt connection of the connection type steel and the integral behavior to the lateral force by putting the corner connection part into the field possible.

In addition, it is possible to maintain the same construction speed of the surrounding modular structure, and it is possible to form the interlayer and interconnect each other due to the construction of the core structure at the same height as the peripheral module structure. So that the modular construction can be maximized.

FIG. 1A shows a construction photograph of a staircase and a core structure (EV shaft) of a conventional modular building,
1B is a perspective view of a conventional PC panel for dust prevention;
1C is a perspective view of a conventional corner mold,
FIGS. 2A and 2B are a conceptual view and a structural perspective view of a construction of a core structure for a medium-
Fig. 2C and Fig. 2D are a connection configuration diagram in the vertical direction (longitudinal direction) and the horizontal direction (lateral direction) of the PC panel of the present invention,
FIG. 3 is a perspective view showing a corner connection portion of a core structure for a medium-
4A, 4B and 4C are flowcharts of a method of constructing a core structure for a medium-and-high modular building of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout the specification, when an element is referred to as "comprising ", it means that it can include other elements as well, without excluding other elements unless specifically stated otherwise.

[Core Structures for Modular Modular Buildings (A1)]

FIGS. 2A and 2B are an exploded perspective view and a constitutional perspective view, respectively, of a core structure A1 for a middle-floor modular building of the present invention, and FIGS. (Lateral direction) of the first embodiment.

The core structure A1 for the medium-and-high-rise modular building assembles the PC panels 100 together, for example, in the form of a hollow box structure.

2A, the modular structure A is installed, and a core structure A1 such as a staircase or an EV shaft is installed around the modular structure A. At this time,

At this time, the modular structure (A) may be a closed box-shaped steel structure that is stacked up, down, left, and right as shown in FIG.

Therefore, a core structure A1 such as a staircase or the like is formed around the modular structure A. The core structure is very vulnerable to lateral force due to its characteristics. This is because the core structure is constructed as a box structure extending upward and downward and left and right are not constructed so that the structures restraining the lateral displacement are tangential.

Accordingly, it is important that the core structure A1 for the middle-floor modular building of the present invention is constructed so that the PC panel 100 is assembled in the form of a hollow square box, and can effectively resist the lateral force generated by the construction of the middle floor.

As shown in FIG. 2B, the PC panel 100 is assembled and assembled in a structure favorable to the lateral force resistance. The PC panel 100 is manufactured in a factory by pre-casting and includes a concrete panel part 110 and a connecting steel 120 As shown in FIG.

First, the concrete panel unit 110 includes a body portion 111 in the form of a reinforced concrete vertical plate, and a reinforcing steel assembly embedded in the body portion.

The upper and lower ends of the vertical reinforcing bars 112 are fixedly connected to each other through the connecting steel pipes 120 to be described later. The vertical reinforcing bars 112 and the horizontal reinforcing bars 113 are spaced apart from each other. .

The vertical reinforcing bars 112 penetrate the concrete panel part 110 up and down so that both ends of the reinforcing steel pipe 112 are connected to each other through one flange 122 of the connecting steel pipe 120,

The connection panel 120 is disposed on the upper and lower surfaces of the concrete panel 110 so as to be in contact with each other. The connection panel 120 is connected to the concrete panel panel 110 by the reinforcing steel assembly. .

In addition, the concrete panel part 110 has a protruding connection part 114 integrally protruding from the upper surface and the central part of the bottom surface.

The vertical part 121 of the connecting steel 120 formed of the d-shaped steel including the vertical part 121 and the both flange 122 is in contact with both sides of the projecting connection part 114, So that it is positioned on the upper surface of the concrete panel part 110.

The vertical flange 112 of the reinforcing bar assembly is connected to the flange 122 by welding or the like so that the concrete panel portion 110 and the two connection flanks 120 are structurally integrated with each other.

The connecting steel pipe 120 is stably set on the upper surface of the concrete panel part 110 and is formed integrally with the reinforcing steel assembly. The protruding connecting part 114 has a side shear connection part 115 The side surface shear connection part 115 is continuous to both sides of the concrete panel part 110 and is used for connecting the PC panel 100 in the left, right, and lateral directions.

As a result, the PC panel 100 of the present invention can be quickly assembled in the left and right direction (lateral direction), and the side front end connection portions 115 can be integrated with each other using an adhesive or the like.

It is to be noted that the connecting-type steel 120 is a section steel integrally fixed to the reinforcing steel assembly with the protrusion connecting portion 114 formed on the upper surface of the concrete panel 110 interposed therebetween.

The vertical portion 121 and the two flanges 122 are formed in a shape of a d-shape so as to be reinforced with a reinforcing member 123 in the form of a vertical plate between both flanges so as to secure the rigidity of the connection portion.

It can be seen that the connecting steel 120 is formed on both the upper and lower surfaces of the concrete panel part 110.

Therefore, the PC panel 100 of the present invention is manufactured in a simple structure and is brought into the field and installed to be connected to each other in the vertical direction (longitudinal direction) and the horizontal direction (lateral direction) of the core structure A1.

2C and 2D, the connection structure of the PC panel 100 of the present invention in the up, down (longitudinal) and left and right directions (lateral direction) can be seen.

First, as shown in FIG. 2C, it can be seen that the connecting panel 120 is connected to the PC panel 100 by bolts and nuts in a simple manner.

At this time, the two flanges 122 constituting the connecting steel 120 are brought into contact with each other by using a hardened rubber strip member 130 and are fastened with bolts and nuts through bolt holes formed in both flanges 122 do.

The strip member 130 has elasticity to prevent breakage due to a working load during installation, to ensure watertightness, and to ensure flatness of the flange surfaces contacting with each other.

Therefore, since the space between the jointed concrete is separated by the thickness of the strip member 130, the grout material is injected therebetween to ensure the integrity of the jointed concrete.

Next, as shown in FIG. 2d, the PC panel 100 is integrated with the side shear connection part 115 using an adhesive or the like in connecting the PC panel 100 in the left and right directions.

As a result, the core structure A1 of the present invention can be easily assembled into a hollow square box structure by connecting the PC panels 100 in left, right, up and down directions (transverse direction and longitudinal direction) Able to know.

[Construction of corner connection (D) of core structure (A1) for medium-rise modular buildings]

Fig. 3 is a perspective view showing a corner connection portion of the core structure A1 for the middle-floor modular building.

As described above, when the PC panel 100 is connected to the upper, lower, left, and right sides, a plurality of corner connecting portions D are formed as the core structure A1 is formed in a rectangular box shape.

When such a corner connection portion is used as it is in the conventional system form, air delay and rapid construction are difficult.

As shown in FIG. 3, the bent vertical formwork 200, which is folded while being wrapped around the corner connection portion, is used to overlap the concrete panel portion 110 of the PC panel 100.

The bent vertical formwork 200 may be a bent steel plate and may have a through hole 210 corresponding to an insert 116 spaced up and down from the concrete panel portion 110 of the PC panel 100 In addition,

The bending and vertical formwork 200 can be simply mounted on the concrete panel part 110 of the PC panel 100 by the fastening bolts 117 inserted into the through holes 210 and fastened to the inserts 116 .

At this time, the corner connecting reinforcing bars 300 are arranged vertically in the bending vertical form 200, thereby securing the structural integrity of the core structure A1 in the vertical direction.

In other words, the corner connecting reinforcing bars 300 can be arranged on the corner connecting portions of the upper and lower PC panels 100 in a vertical direction and a downward direction, and the concrete is inserted inside the bending and vertical formwork 200 so that the corner connecting reinforcing bars 300 are embedded. The corner connection portions of the vertical panel 100 can be structured integrally with each other.

When the concrete laid thereon is cured, the bolt 117 is removed from the insert, and the bending vertical form 200 is recovered and reusable.

[Construction method of core structure for medium-rise modular buildings]

4A, 4B and 4C are flowcharts of a method of constructing a core structure for a medium-and-high modular building of the present invention.

This construction method will eventually enable the simultaneous construction of the modular structure A and the core structure A1 such as a staircase or an EV shaft around the modular structure A in the middle-floor modular structure.

As shown in FIG. 4A, as described above, the PC panel 100 manufactured in advance at the factory has the number of installed units determined according to the core structure A1, and the modular structure A is installed, The positions where the shafts should be positioned, and the like) in the lateral direction.

As described above, as described above, the projecting connection portion 114 of the PC panel 100 and the concrete panel portion 110 are assembled to each other by using the side shear connection portion 115 including the upper end portion and the lower end portion, But they are connected to each other by using an adhesive or the like. It can be seen that one end of a core structure in the form of a hollow box-shaped body in which four corner connecting portions are formed is provided.

Next, as shown in FIG. 4B, the PC panels 100 are connected to each other in the transverse direction and the longitudinal direction in two or more stages by fastening the jointed steel pipes 120 to the upper surface of the first stage of the core structure A1 with bolts and nuts .

Next, as shown in FIG. 4C, the corner connecting reinforcing bars 300 are set on the corner connecting portions of the three-stage PC panels 100, and the bending and vertical forming mold 200 is inserted into the inserts 300 so that the corner connecting reinforcing bars 300 are positioned inside. And connection bolts.

Therefore, it can be understood that when the concrete is placed in the bending vertical form (200) and cured in the field, the final core structure (A1) is completed.

It will be understood by those skilled in the art that the foregoing description of the present invention is for illustrative purposes only and that those of ordinary skill in the art can readily understand that various changes and modifications may be made without departing from the spirit or essential characteristics of the present invention. will be. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.

The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

100: PC panel
110: concrete panel part 111: body part
112: vertical reinforcement 113: horizontal reinforcement
114: projecting joint 115: side shear connection
116: insert 117: fastening bolt
120: connecting section steel 121: vertical section
122: Both flanges 123: Stiffener
130: Stitch member 200: Bending vertical formwork
210: Through hole 300: Corner connection reinforcing bar
A: modular structure A1: core structure

Claims

And is installed so as to be simultaneously installed around the modular structure (A)
A concrete panel part 110 in which a rebound assembly including a vertical reinforcing bar 112 is embedded and a protruding connection part 114 is formed on an upper surface and a central part of a bottom surface of the vertical body 111; And a connecting flange 122 connected to the vertical reinforcing bars 112 through upper and lower surfaces of both side concrete panel portions of the protruding connection portion 114. The PC panel 100 includes a front panel 120, Left, right, and right, and is formed into a hollow box shape,
The vertical reinforcing bars 112 penetrate the concrete panel part 110 up and down so that both ends of the reinforcing steel pipe 112 are connected through the one flange 122 of the connecting steel pipe 120, In addition,
The connection-type steel pipe 120 is integrally fixed to the reinforcing steel assembly with the protruding connection portion 114 formed on the upper surface of the concrete panel 110 interposed therebetween so as to secure the connection site rigidity with respect to the lateral force,
The vertical part 121 of the connected steel pipe 120 formed of the d-shaped steel including the vertical part 121 and the both flange 122 is in contact with both sides of the projecting connection part 114, (110) and the bottom surface
Wherein the PC panels (100) are vertically and vertically connected to each other so that the connected steel pipes (120) are connected to each other by bolts and nuts.

The method according to claim 1,
The protruding connection portion 114 is formed with side front end connection portions 115 including front end grooves and shear keys on both side portions and the side front end connection portions 115 are formed continuously on both side portions of the concrete panel portion 110, (100) to the left and right.

3. The method of claim 2,
The upper and lower connections of the PC panel 100
The two flanges 122 constituting the connecting steel 120 are brought into contact with each other by using a hardened rubber strip member 130 and are fastened with bolts and nuts through bolt holes formed in both flanges 122 Core Structures for Modular Buildings.

The method of claim 3,
A core structure for a medium-and-high-rise modular building, wherein grout material (G) is injected between the jointed concrete spaced apart by the thickness of the strip member (130) to ensure integrity of the jointed concrete.

The method according to claim 1,
The corrugated joint of the PC panel of the core structure for the medium-and-high-rise modular building, which is formed in the form of a hollow square box, is structured to ensure the integrity of the upper and lower parts by pouring concrete,
The concrete is bent while wrapping around the corner connecting portion so that the corner connecting reinforcing bars 300 are disposed inside the bending vertical form 200 of the concrete panel portion 110 of the PC panel 100. The corner connecting reinforcing bars 300 The core structure for the modular medium-rise building, which is made by curing concrete laid to be buried.

6. The method of claim 5,
The bending vertical form 200 is formed in a bent form and is formed with a through hole 210 corresponding to the insert 116 spaced up and down from the concrete panel portion 110 of the PC panel 100 Which allows the bending and vertical formwork 200 to be mounted on the concrete panel part 110 of the PC panel 100 by the fastening bolts 117 inserted into the through holes 210 and fastened to the inserts 116, Floor modular construction Core construction.

(a) a concrete panel part 110 in which a rebound assembly including a vertical reinforcing bar 112 is embedded and a protruding connection part 114 is formed on an upper surface and a central part of a bottom surface of a vertical body 111; And a connection flange 122 connected to the vertical reinforcing bars 112 through upper and lower surfaces of both side concrete panel parts of the protruding connection part 114 and connected to the PC panel 100. [ step;
(b) The PC panel 100 is horizontally connected to the modular structure (A) in a lateral direction by transversely connecting one end of the PC panel 100 in a rectangular box shape, And a side shear connection part 115 including a front end recess and a shear key formed on both sides of the concrete panel part 110, respectively;
(c) Coupling steel bars 120 formed on the bottom of another PC panel on the upper side of the transversely connected PC panel 100 are fastened to each other by bolts and nuts, so that the PC panels 100 are moved up, down, left, Right; And
(d) The corner connecting reinforcing bars 300 are set on the corner connecting portions of the PC panels 100 and the bending and vertical forming molds 200 are inserted into the inserts (not shown) formed on the concrete panel portion 110 116 to a fastening bolt 117 and pouring concrete into the bending vertical form 200 to ensure the integrity of the upper and lower edges of the corner connecting portion,
In the step (c), the connection steel 120 is integrally fixed to the reinforcing steel assembly with the protruding connection part 114 formed on the upper surface of the concrete panel part 110 interposed therebetween so as to secure rigidity of the connection site with respect to the lateral force The vertical portion 121 of the connecting steel 120 formed of the d-shaped steel including the vertical portion 121 and the both flanges 122 is in contact with both sides of the projecting connection portion 114, The upper and lower surfaces of the panel unit 110 and the PC panels 100 are vertically and vertically connected to each other so that the connecting steel pipes 120 are connected to each other by bolts and nuts, Construction method of core structure.

8. The method of claim 7,
The bending vertical form 200 of the step (d) is bent in the form of a curved line. The bending vertical form 200 has a through hole 210 corresponding to the insert 116 formed on the concrete panel 110 of the PC panel 100, So that when the concrete placed in the bending vertical form 200 is cured, the bolt 117 is removed from the insert 116 to recover the bending vertical form 200 to enable reuse. Construction method of core structure.

8. The method of claim 7,
The upper and lower connections of the PC panel 100 in the step (c) are made such that the two flanges 122 constituting the connected steel pipe 120 are brought into contact with each other by using the hardened rubber strip member 130, 122 are formed with bolts and nuts, and grouting material is injected between the jointed concrete spaced apart by the thickness of the strip member 130 to ensure the integrity of the jointed concrete. Construction method of core structure for modular high - rise building.

8. The method of claim 7,
The vertical reinforcing bars 112 of the step (a) penetrate the concrete panel part 110 up and down so that both ends of the reinforcing steel pipe 120 are connected to each other through the one flange 122 of the connecting steel pipe 120, (110) to ensure structural integrity of the core structure.