KR101854847B1 - the hybrid self-positioning connecting structure of column and beam for a horizontal extending a building - Google Patents

the hybrid self-positioning connecting structure of column and beam for a horizontal extending a building Download PDF

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KR101854847B1
KR101854847B1 KR1020150102917A KR20150102917A KR101854847B1 KR 101854847 B1 KR101854847 B1 KR 101854847B1 KR 1020150102917 A KR1020150102917 A KR 1020150102917A KR 20150102917 A KR20150102917 A KR 20150102917A KR 101854847 B1 KR101854847 B1 KR 101854847B1
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South Korea
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plate
column
horizontal
wall
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KR1020150102917A
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Korean (ko)
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KR20170012625A (en
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홍원기
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경희대학교 산학협력단
(주)케이에이치하우징솔루션스
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G23/00—Working measures on existing buildings
    • E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
    • E04G23/0266—Enlarging
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
    • E04B1/19—Three-dimensional framework structures
    • E04B1/1903—Connecting nodes specially adapted therefor
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/38—Connections for building structures in general
    • E04B1/58—Connections for building structures in general of bar-shaped building elements

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Mechanical Engineering (AREA)
  • Joining Of Building Structures In Genera (AREA)

Abstract

The present invention is for remodeling a previous structure (PS) requiring horizontal enlargement,
A plurality of walls W of the structure PS requiring horizontal expansion;
A plurality of slabs (S) across the wall (W);
A plurality of wall plates 510 installed at intersections of the wall W and the slab S;
A plurality of pillars (100) spaced from the wall (W) by a distance for horizontal enlargement and provided with a column plate (110) in a direction to face the wall (W); And
A plurality of beams 200 each having a beam plate 210 at both ends thereof and a nut N exposed on an outer surface of the beam plate 210;
, ≪ / RTI >
Since the wall plate 510 and the column plate 110 are formed with the slots 514 and 114 through which the nut N is inserted horizontally or vertically from the vertical end or the horizontal end, respectively,
Characterized in that the slots (514, 114) allow for self-positioning and enable the installation of a framework for horizontal expansion of the structure (PS). The hybrid self- Structure.

Description

[0001] The present invention relates to a hybrid self-positioning connection structure for columns and beams for horizontal extension,

The present invention relates to a structure for horizontally enlarging a building, which is constructed by dry-assembling a frame of a part to be horizontally expanded without connecting the existing wall and slab in a new building or remodeling process of the building by wet connection, using a hybrid self- And a hybrid self-positioning connection structure.

In the remodeling process of the building, horizontal expansion is frequent in addition to vertical expansion.

In the case of the conventional horizontal enlargement, most of the existing wall and slab are formed by a wet method by partially or completely removing the enlarged surface or extending the existing wall and slab.

In this case, it is pointed out that the construction period and the construction cost increase as well as the excessive waste material occurrence, and the predetermined construction quality can not be maintained in the case of non-skilled workers.

In addition, the floor height of the conventional wall-mounted apartment is small, so that it is not possible to cope with the existing slab dancing when the horizontal extension is performed with the ramenton. However, since the hybrid self-positioning connection structure of columns and beams for horizontal expansion is composed of a hybrid member of steel and PC concrete, the floor height can be reduced, and horizontal enlargement can be made so that the slab of the existing building can correspond to the floor. In addition, we propose a dry method to overcome the problems of existing wet method.

Therefore, the present inventors have found that a hybrid self-positioning connection structure is used to dryly assemble a frame of a part to be horizontally expanded without changing existing walls and slabs during a building expansion or remodeling process, Positioning linkage structure.

[Patent Document 1] Korean Patent No. 10-1379280 'Horizontal Extension System of Unit Module and Construction Method', April 14, 2014 [Document 2] Korean Patent Registration No. 10-0622935 'Horizontal Extension Joint Structure and Joint Method Using the Same', September 13, 2006

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems of the related art. The purpose is as follows.

First, it is intended to provide a hybrid self-positioning connection structure of columns and beams for horizontally enlarging the joints by self-positioning of the joints by dryly assembling the frames of the enlarged portions without changing the existing wall and slab .

Second, it provides a hybrid self-positioning connection structure of columns and beams for horizontal expansion, which is effective in reducing the construction period and saving construction cost because it is constructed in a safe and fast manner in high-altitude.

Third, it is intended to provide a hybrid self-positioning connection structure of a column and a beam for horizontal reinforcement which is easy to install and disassemble.

Fourth, we want to provide a hybrid self-positioning connection structure for columns and beams for horizontal enlargement that minimizes the migration and retirement of resident in the renovation process of buildings due to low environmental pollution factors such as noise and dust.

Fifth, it is necessary to dryly assemble the prefabricated parts on the ground or factory with accurate dimensions and shape, and to assure that the accuracy of construction such as vertical and horizontal is automatically adjusted and maintained by gravity and gravity of members, And to provide a hybrid self-positioning connection structure of columns and beams for extension.

Sixth, we provide a hybrid self-positioning connection structure of columns and beams for horizontally enlarging the slabs of existing buildings by reducing the floor height because they are composed of a hybrid member of steel and PC concrete.

In order to solve the above-mentioned technical problem, the present invention is for remodeling a previous structure (PS) requiring horizontal enlargement,

A plurality of walls W of the structure PS requiring horizontal expansion;

A plurality of slabs (S) across the wall (W);

A plurality of wall plates 510 installed at intersections of the wall W and the slab S;

A plurality of pillars (100) spaced from the wall (W) by a distance for horizontal enlargement and provided with a column plate (110) in a direction to face the wall (W); And

A plurality of beams 200 each having a beam plate 210 at both ends thereof and a nut N exposed on an outer surface of the beam plate 210;

, ≪ / RTI >

Since the wall plate 510 and the column plate 110 are formed with the slots 514 and 114 through which the nut N is inserted horizontally or vertically from the vertical end or the horizontal end, respectively,

Characterized in that the slots (514, 114) allow for self-positioning and enable the installation of a framework for horizontal expansion of the structure (PS). The hybrid self- Structure.

According to the present invention, the following effects are expected.

First, it provides a hybrid self-positioning connection structure of a column and a beam for horizontally extending the connection where the connection is self-positioned, while the existing frame and the slab are not changed but the horizontal enlarged frame is dry-assembled.

Second, it provides a hybrid self-positioning connection structure for columns and beams for horizontal expansion, which is effective in reducing the construction period and saving construction costs because it is constructed quickly and safely at high altitudes.

Third, it provides a hybrid self-positioning connection structure of columns and beams for horizontal expansion which can be easily re-installed and disassembled.

Fourth, it provides a hybrid self-positioning connection structure for columns and beams for horizontal expansion that minimizes the migration and retirement of residents in the renovation process of the building due to low environmental pollution factors such as noise and dust.

Fifth, it is necessary to dryly assemble the prefabricated parts on the ground or factory with accurate dimensions and shape, and to assure that the accuracy of construction such as vertical and horizontal is automatically adjusted and maintained by gravity and gravity of members, And provides a hybrid self-positioning connection structure of columns and beams for extension.

Sixth, it is composed of a hybrid member of steel frame and PC concrete, so it provides a hybrid self-positioning connection structure of columns and beams for horizontally enlarging the slab of existing buildings to reduce the floor height.

FIGS. 1 to 15 show a construction sequence of a hybrid self-positioning connection structure of a column and a beam for horizontal extension of the present invention.
FIGS. 16 to 20 illustrate a process of sequentially applying one beam in the hybrid self-positioning connection structure of the column and beam for horizontal extension of the present invention.
Fig. 21 is an enlarged view of Fig.
Figures 22 to 25 are views of Figures 16 to 20 from different angles.
FIGS. 26 to 28 illustrate a construction process of a beam installed between columns in the present invention in order.
FIG. 29 is a detailed view of mutual connection structures when the column plates and the beam plates are connected in the vertical direction.
30 to 32 illustrate a process of horizontally forming a slot to connect a beam to a column.
FIG. 33 is a detailed view of the mutual connection structure when the column plate and the beam plate are connected in the horizontal direction in FIGS. 30 to 32. FIG.
34 to 35 show an example using setting bolts and setting holes as another embodiment of the present invention.
36-37 are various embodiments of beams used in the present invention.
38 is a cross-sectional view and an enlarged view of another embodiment of the present invention.
Figs. 39 to 41 illustrate the connection structure when dividing a beam into a girder and a beam in the present invention in order.
FIG. 42 illustrates a connection structure between columns in the present invention. FIG.
43 to 44 illustrate the process of constructing the refractory mortar in FIG.
45 to 46 illustrate another embodiment of the present invention.
47 to 48 illustrate another embodiment of the present invention.
Figures 49 and 50 are specific dimensions given in the embodiments of Figures 47-48.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIGS. 1 to 15 illustrate a construction procedure of a hybrid self-positioning connection structure of a column and a beam for horizontal extension of the present invention,

FIGS. 16 to 20 illustrate a sequence of one beam installation in the hybrid self-positioning connection structure of columns and beams for horizontal expansion of the present invention, and FIG. 21 is an enlarged view of FIG.

And Figures 22 to 25 are views of Figures 16 to 20 from different angles.

The hybrid self-positioning connection structure of the column and the beam for the horizontal extension of the present invention,

For remodeling a previous structure PS requiring horizontal expansion as shown in FIGS. 1 to 25,

A plurality of walls W of the structure PS requiring horizontal expansion;

A plurality of slabs (S) across the wall (W);

A plurality of wall plates 510 installed at intersections of the wall W and the slab S;

A plurality of pillars (100) spaced from the wall (W) by a distance for horizontal enlargement and provided with a column plate (110) in a direction to face the wall (W); And

A plurality of beams 200 each having a beam plate 210 at both ends thereof and a nut N exposed on an outer surface of the beam plate 210;

, ≪ / RTI >

Since the wall plate 510 and the column plate 110 are formed with the slots 514 and 114 through which the nut N is inserted horizontally or vertically from the vertical end or the horizontal end, respectively,

Positioning is possible due to the slots 514 and 114 and it is possible to install a framework for horizontal expansion of the structure PS.

24,

A plurality of bolts pass through the beam plate 210 and the wall plate 510,

The bolt may be fastened to the back surface of the wall plate 510 with a nut or may be anchored to the slab S or the wall W. [

As shown in Figs. 17 and 21,

A guide plate GP is formed on at least one of upper, lower, left, and right sides of the wall plate 510 or the column plate 110,

It is possible to self-position the end of the beam plate 210 due to the guide plate GP when the beam 200 is moved and to install a framework for horizontal expansion of the structure PS .

And,

At least one of the upper end of the wall plate 510 and the lower end of the beam plate 210 or the side end of the wall plate 510 and the side end of the beam plate 210,

And the bevel plate 210 can be easily moved by being sloped.

FIGS. 26 to 28 illustrate a construction process of a beam installed between columns in the present invention in order,

FIG. 29 is a detailed view of mutual connection structures when the column plates and the beam plates are connected in the vertical direction.

30 to 32 illustrate a process of horizontally forming a slot to connect a beam to a column,

FIG. 33 is a detailed view of the mutual connection structure when the column plate and the beam plate are connected in the horizontal direction in FIGS. 30 to 32. FIG.

As shown in Figs. 26 to 33,

A plurality of beams 200 are installed between the pillars 100,

A column plate (110) is provided on the outer surface of the column (100) in a direction in which the other column is viewed,

Since the column plates 110 are formed with the slots 114 through which the nuts N are inserted horizontally or vertically from the vertical ends (Figs. 26 to 29) or the horizontal ends (Figs. 30 to 33)

It is possible to self-position the beam 200 installed between the pillars 100 due to the slots 114 and to install a framework for horizontally enlarging the structure PS .

34 to 35 illustrate an example using setting bolts SB and setting holes H as another embodiment of the present invention.

36-37 are various embodiments of beams used in the present invention.

The beam (200)

It is a PC without a steel frame,

(FIG. 36) in which the beam steel is provided at both ends and the beam concrete 205 is wrapped around the whole of the beam or only beneath the beam of the beam,

The beam concrete 205 contacts the beam plate 210 as shown in FIG. 36 (b) or is spaced apart as shown in FIG. 36 (a)

And fill the space above the beam concrete (205) and the space (207) when slab concrete (not shown) is poured.

As shown in Fig. 37, in the example of Fig. 36, the supporting steel frame 202 may be omitted.

38 is a cross-sectional view and an enlarged view of another embodiment of the present invention.

38,

In the present invention, the nut plate (210) is provided with a nut hole, and the nut (N) is installed at the other end so as to protrude at one end,

Since the thickness of the column plate 110 is the same as the protrusion length of one end of the nut N,

The amount of steel material of the beam plate 210 and the column plate 110 can be reduced.

More specifically,

When the total length of the nut N is 22 mm, the end is designed to be caught in the vertical or horizontal formed slot 114 of the column plate 110 by about 5 mm,

Since the other end of the nut N is required to support the front end of the nut N about 7 mm in thickness, the required amount of steel material of the beam plate 210 and the column plate 110 can be reduced.

Figs. 39 to 41 illustrate the connection structure when dividing a beam into a girder and a beam in the present invention in order.

As shown in Figs. 39 to 41,

When the beam 200 is divided into a large girder 300 and a small beam 400 having a beam plate 410 exposed on the outer surface thereof with a nut N,

A girder plate 310 is installed at an end of the girder 300,

The girder plate 310 is formed with a slot 314 through which the nut N is inserted horizontally or vertically from a vertical end or a horizontal end, respectively,

It is possible to self-position the beam 400 and to make it possible to install a framework for horizontal expansion of the structure PS.

17 and 21,

At least one of the upper end of the girder plate 310 and the lower end of the beam plate 410 or the side end of the girder plate 310 and the side end of the beam plate 410,

So that the beam plate 410 can be easily moved.

The beam 400 has a shape similar to that of the beam 200,

The beam (400)

Beam-free steel PC,

There is a beam steel frame at both ends, and the beam concrete is wrapped around the entire beam steel frame or wrapped only under the beam steel frame,

The beam concrete contacts or is spaced from the beam plate 410 to form a space,

And filling the upper part of the beam concrete and the space when the slab concrete (not shown) is poured.

FIG. 42 illustrates a connection structure between columns in the present invention. FIG.

As shown in Fig. 42,

A column end plate CF is installed on the upper or lower part of the column 100,

When a plurality of pillars 100 are connected in series,

And the setting cone (CFC) and the setting cone insertion hole (CFH) are formed in the corresponding two column end plates (CF) of the connection part in correspondence with each other.

When the columns 100 are connected to each other, the setting cone CFC and the setting cone insertion hole CFH are engaged with each other in a corresponding shape so that the self- -positioning.

43 to 44 illustrate the process of constructing the refractory mortar in FIG.

As shown in Figs. 43 to 44,

The column end plates CF of the lower part of the column 100 and the column end plates CF of the upper part of the other column 100 are coupled using bolts and nuts and then the joining parts of the column- It can be coated with mortar (FPM)

At this time, the refractory mortar (FPM) is covered with the mold unit FU divided into the plural members.

45 to 46 illustrate another embodiment of the present invention.

45 to 46, the embodiment has a column bracket 120 additionally provided in the column 100,

The column plate 110 is provided with a slotted column plate 110 having a slot 114 'in which only a part of the thickness of the column plate 110 is recessed so that the nut N is inserted horizontally or vertically from a vertical end or a horizontal end, 110 "); < / RTI >

A column bracket 120, to which a bracket reinforcing bar 122 is attached, is added to the column 100,

And an end of the bracket reinforcing bar 122 is fastened with a nut N so as not to protrude from the slot 114 '.

A guide plate GP is formed on at least one of upper, lower, left, and right sides of the wall plate 510 or the slot-type column plate 110 'so that the end of the beam plate 210, when moving the beam 200, It is possible to self-position due to the plate GP and to enable the frame installation for horizontal expansion of the structure PS,

At least one of the upper end of the slotted column plate 110 'and the lower end of the beam plate 210 or the side end of the slotted column plate 110' and the side end of the beam plate 210 , And the bevelling plate 210 can be easily moved by being cut obliquely,

A setting bolt SB and a setting hole SH are formed on the lower end of the slotted column plate 110 and the lower ends of the beam plate 210 to enable self positioning.

Figs. 47-48 illustrate another embodiment of the present invention, and Figs. 49 and 50 show specific dimensions in the embodiments of Figs. 47-48.

The embodiment of Figs. 47-48 is similar to the embodiment of Figs. 45-46 in that the column 100 further comprises a post bracket 120,

A column bracket 120 to which a bracket reinforcing bar 122 is attached is added to the column 100,

The column plate 110, in which the slot 114 is omitted, is installed at an end of the bracket reinforcing bar 122 as a nut N,

The beam plate 210 includes a slotted plate 210 'having a slot 214 in which a part of the thickness of the beam plate 210 is recessed so that the nut N is inserted horizontally or vertically from a vertical end or a horizontal end. ). ≪ / RTI >

A guide plate GP is formed on at least one of upper, lower, left, and right sides of the wall plate 510 or the column plate 110. When the beam 200 is moved, GP), it is possible to perform self positioning of the structure (PS), to make it possible to install a frame for horizontal expansion of the structure (PS)

A guide plate GP is formed on at least one of upper, lower, left, and right sides of the wall plate 510 or the column plate 110. When the beam 200 moves, the end of the beam plate 210 contacts the guide plate GP. It is possible to perform self positioning of the structure PS and to install a framework for horizontal expansion of the structure PS,

A setting bolt SB and a setting hole SH are formed at the lower end of the wall plate 510 and at the lower ends of the beam plate 210. The lower end of the column plate 110 and the lower end of the beam plate 210 And a setting bolt SB and a setting hole SH are formed in each of the lower ends to enable self-positioning.

And,

The beam (200)

It is a PC without a steel frame,

And the beam concrete 205 is wrapped around the whole of the beam or is wrapped only under the break of the beam,

The beam concrete 205 is in contact with or spaced from the beam plate 210 to form a space 207,

And fill the space above the beam concrete (205) and the space (207) when slab concrete (not shown) is poured.

Figs. 49 and 50 are specific dimensions in the embodiment of Figs. 45 to 46, and it is assumed that the nut N fastened to the rebar 201 is the same as that of the slotted column plate 110 ' And the length of the embossed portion is variously calculated when it is embedded in the slot 114 '.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention.

It is therefore intended that the appended claims cover such modifications and variations as fall within the true scope of the invention.

PS: structure
W: Wall
S: Slab
SB: Setting bolt
SH: Setting hole
GP: Guide plate
N: Nut
CF: Column end plate
CFC: Setting cone
CFH: Setting cone insertion hole
100: Column
110: column plate
110`: Slotted column plate
120: Column bracket
122: Bracket reinforcement
114, 114, 214, 314, 514: Slot
200: Bo
201: Reinforced concrete
205: Beam concrete
207: Space
210:
210`: Slotted plate
300: girder
310: girder plate
400: beam
410: beam plate
510: wall plate

Claims (18)

delete delete delete delete delete delete delete delete delete delete delete For remodeling the existing structure (PS) requiring horizontal expansion,
A plurality of walls W of the structure PS requiring horizontal expansion;
A plurality of slabs (S) across the wall (W);
A plurality of wall plates 510 installed at intersections of the wall W and the slab S;
A plurality of pillars (100) spaced from the wall (W) by a distance for horizontal enlargement and provided with a column plate (110) in a direction to face the wall (W); And
A plurality of beams 200 each having a beam plate 210 at both ends thereof and a nut N exposed on an outer surface of the beam plate 210;
, ≪ / RTI >
Since the wall plate 510 and the column plate 110 are formed with the slots 514 and 114 through which the nut N is inserted horizontally or vertically from the vertical end or the horizontal end, respectively,
Characterized in that the slots (514, 114) allow for self-positioning and enable the installation of a framework for horizontal expansion of the structure (PS). The hybrid self- In the structure,
The column plate 110 is provided with a slotted column plate 110 having a slot 114 'in which only a part of the thickness of the column plate 110 is recessed so that the nut N is inserted horizontally or vertically from a vertical end or a horizontal end, 110 ");< / RTI >
A column bracket 120, to which a bracket reinforcing bar 122 is attached, is added to the column 100,
And the end of the bracket reinforcing bar 122 is fastened with a nut N so as not to protrude from the slot 114 '. The hybrid self-positioning connection structure for a column and a beam for horizontal extension.
delete The method of claim 12,
A guide plate GP is formed on at least one of upper, lower, left, and right sides of the slotted column plate 110 'so that the end of the beam plate 210 when the beam 200 is moved is guided by the guide plate GP, it is possible to perform self-positioning and to install a framework for horizontal expansion of the structure PS,
At least one of the upper end of the slotted column plate 110 'and the lower end of the beam plate 210 or the side end of the slotted column plate 110' and the side end of the beam plate 210 And the beam plate 210 is slidably cut to facilitate the movement of the beam plate 210. The hybrid self-positioning connection structure of the column and the beam for horizontal extension.
delete The method of claim 12,
The beam (200)
It is a PC without a steel frame,
And the beam concrete 205 is wrapped around the whole of the beam or is wrapped only under the break of the beam,
The beam concrete 205 is in contact with or spaced from the beam plate 210 to form a space 207,
And the space (207) is filled in the upper portion of the beam concrete (205) when slab concrete (not shown) is poured. The hybrid self-positioning connection structure of the column and the beam for horizontal extension.
delete delete
KR1020150102917A 2015-07-21 2015-07-21 the hybrid self-positioning connecting structure of column and beam for a horizontal extending a building KR101854847B1 (en)

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CN113136944B (en) * 2021-04-28 2022-10-18 温州市万丰建设工程有限公司 Beam column structure for building and construction method thereof

Citations (2)

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Publication number Priority date Publication date Assignee Title
KR101115016B1 (en) * 2009-08-13 2012-03-07 동국대학교 산학협력단 Construction method for building remodeling by using precast panel, and connecting structure for remodeling precast panel
KR101429137B1 (en) * 2012-03-06 2014-08-11 경희대학교 산학협력단 PC Beam Unit Connection Structure For Expensive Space And Construction Method Thereof

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100622935B1 (en) 2005-05-04 2006-09-13 삼성물산 주식회사 Horizontal extension joint structuer and joint method using thereof
KR101379280B1 (en) 2013-10-25 2014-04-14 한국건설기술연구원 Horizontal expansion unit module systems and construction methods

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101115016B1 (en) * 2009-08-13 2012-03-07 동국대학교 산학협력단 Construction method for building remodeling by using precast panel, and connecting structure for remodeling precast panel
KR101429137B1 (en) * 2012-03-06 2014-08-11 경희대학교 산학협력단 PC Beam Unit Connection Structure For Expensive Space And Construction Method Thereof

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