KR101260392B1 - Precast concrete column and beam unit assembling structure being connected in the low bending moment zone - Google Patents

Abstract

PURPOSE: A prefabricated structure of a PC(precast) concrete column and a beam unit is provided to improve structural performance with respect to vertical and horizontal loads and to rapidly perform a task in high-altitude. CONSTITUTION: A PC concrete column and a beam unit joined in a low bending moment zone comprises an upper PC column(UC), a lower PC column(DC), a column re-bar(CB), a bracket member(110), lower bracket concrete(120), joint concrete(200), and a low bending moment joint material. The lower bracket concrete and joint concrete are integrally poured for pre-producing PC columns and beams for one unit or floor. The upper part of the upper PC column and the lower part of the lower PC column are positioned in the low bending moment zone. Both ends of the bracket member are positioned in a beam low bending moment zone(BLM).

Description

Precast Concrete Column And Beam Unit Assembling Structure Being Connected In The Low Bending Moment Zone}

The present invention relates to a prefabricated structure that can be easily assembled on-site as a PC column of several sections or layers in the PC pillar,

In prefabricated single or single-layer PC columns and beam units, the connection of the columns is assembled in the low bending zone, which occurs during horizontal and vertical loads, and the connection of the beams is applied during vertical loads. The present invention relates to a prefabricated structure of a PC column and beam units connected in a low moment zone having excellent structural performance against vertical and horizontal loads before or after installation by enabling assembly in a low moment zone generated.

In recent years, the demand for precast concrete structures is increasing due to the increase in the demand for high-rise buildings.

The conventional PC structure is manufactured by pre-fabricating the PC pillar unit and the PC beam unit in the field. In the conventional PC structure, even though the coupling portions between the PC pillar units are separate, the construction of the coupling portions of the PC pillar units and the PC beam units is performed by the reinforcement of the reinforcement in the small space between the units. According to this, there are many differences in work speed and quality, and the risk of safety accident is high. In addition, when the grouting or concrete pouring to reinforce the coupling portion of the PC column unit and PC beam unit is preceded by the formwork, there is a hassle to cut and form the form in the field due to the complex shape of the coupling portion. It takes a lot of time and attention due to the nature of manual work at high altitude.

In the case of steel frames, structures such as columns and beams can be quickly constructed first with steel frames, and all other types of construction can be performed independently and in parallel by using the structures constructed with steel frames as supports. Therefore, the structural work including the slab construction of steel frame does not become a critical path in the whole process and does not delay the air.

However, in the case of the PC structure, it is impossible to perform the structure construction of the upper layer until the structure construction (column and beam) and the slab construction of the lower layer are completed, and as described above, a lot of time is required in the construction of the coupling portion of the PC pillar unit and the PC beam unit. As a result, it has been pointed out that the construction of the PC structure becomes a critical path in the whole process and delays the air.

1 illustrates a structure consisting of a combination of pillars and beams of a building and a moment diagram of a section. As shown in FIG. 1, when the moment (blue solid line) acting on the pillar of each layer or section is examined, the minimum moment (CLM) acts at the upper point of the beam or slab level, and the maximum moment (HM) is usually applied at the beam or slab level. Works. In addition, when looking at the moment due to the vertical load acting on the beam (solid red line), the minimum moment (BLM) is applied at the point spaced apart from the column, and the high moment zone (HM) is formed at the junction between the beam and the column. do.

Therefore, such a conventional PC structure makes it difficult to install the connecting portion when installing the PC pillar or PC beam and leads to a risk of safety accident. It has also been pointed out the structural severity that adversely affects the entire PC structure due to unexpected loads during construction.

The problem of the conventional PC structure described above is that the pillar member and the beam member are all critical paths, so that they are designed as a unit unit according to the first floor, section 1, beam level, or slab level. Construction convenience and structural safety have been overlooked.

Therefore, as shown in Figure 1, the connection between the PC pillar unit and the beam unit is placed in the low moment zone (CLM, BLM) with less moment acting to securely manufacture all the units of the PC pillar and beam on the ground, and then lifted into the air Therefore, by simply performing the connection work at high altitudes, the construction difficulty in high altitudes is eliminated to increase workability and safety, and the structure of the PC column and beam unit joint structure having excellent structural performance against buckling or vertical and horizontal loads Development is urgent.

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, the PC pillar and beam connected between the PC pillar and beam unit, and the PC pillar and beam unit and beam member in the low moment zone, not the high moment zone, and have excellent structural performance against vertical and horizontal loads. To provide a prefabricated structure of the beam unit.

Second, to provide a prefabricated structure of the PC column and beam unit connected in the low-moment zone, which is convenient in construction and fast in high altitude by manufacturing a PC member with a PC column and beam unit including the conventional complex work in the ground in advance. .

Third, it is easy to install at the installation site to provide a prefabricated structure of the PC column and beam unit that is connected in the low moment zone that can secure a certain quality even inexperienced workers.

Fourth, to provide a prefabricated structure of the PC column and beam unit connected in the low moment zone improved construction work because the construction method is minimized wet work.

In order to solve the above technical problem, the present invention combines a prefabricated single or one layer of PC pillar and beam unit with each other, and in the structure of coupling the other PC pillar and beam unit and beam member to the PC pillar and beam unit. ,

Upper PC column (UC); A lower PC column (DC) installed spaced apart from the upper PC column (UC); A plurality of column reinforcement bars (CB) vertically arranged between the upper PC column (UC) and the lower PC column (DC); A bracket member 110 horizontally inserted into the spaced space between the upper PC column UC and the lower PC column DC; A lower bracket concrete 120 which is installed by being poured under the bracket member 110; A joint concrete (200) placed between the spaced space between the upper PC column (UC) and the lower PC column (DC) and the bracket lower concrete 120; And a low moment connector connecting material (CP) installed at any one or more of the upper part of the upper PC column (UC) or the lower part of the lower PC column (DC) to form a joining column with other PC columns and beam units. PC column and beam unit configured by

The bracket lower concrete 120 and the joint concrete 200 are integrally placed so that the PC pillar and the beam unit of one section or one layer are pre-fabricated, and the upper and lower PC pillars of the upper PC pillar UC ( The lower part of DC) is located in the pillar low moment zone (CLM) where the moment acting on the pillar is small or minimum throughout the building, and both ends of the bracket member 110 have the moment due to the vertical load acting on the beam throughout the building. Located on the small or minimum beam moment zone (BLM), the PC pillar connected to the other PC column, beam unit, and beam member (B) is made in a place where the moment is small or minimal. And a prefabricated structure of the beam unit.

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

First, the PC pillar and beam connected between the PC pillar and beam unit, and the PC pillar and beam unit and beam member in the low moment zone, not the high moment zone, and have excellent structural performance against vertical and horizontal loads. Provides a prefabricated structure of the beam unit.

Second, by providing a PC member with a PC column and beam unit, including the complex work in the conventional high ground in advance, to provide a prefabricated structure of the PC column and beam unit connected in a low moment zone is convenient and fast construction at high altitude.

Third, it can be easily installed at the installation site provides a prefabricated structure of the PC column and beam unit that is connected in the low moment zone that can secure a certain quality even inexperienced workers.

Fourth, it provides a prefabricated structure of the PC column and beam unit connected in the low moment zone is improved construction work because the construction method is minimized wet work.

1 illustrates a structure consisting of a combination of pillars and beams of a building and a moment diagram of a section.
Figure 2 is a combined perspective view of the PC column and beam unit of the present invention.
Figure 3 is a combined perspective view of another embodiment of the PC column and beam unit of the present invention.
Figure 4 is a perspective view of the bracket member used in the present invention.
Figure 5 shows the low moment connecting portion used in the present invention connecting the lower PC column and the upper PC column.
6 is a combined perspective view of another embodiment of the PC column and beam unit of the present invention.
Figure 7 is a perspective view of the combination of the bracket member and the vertical reinforcement and the upper and lower plates used in the present invention.
Figure 8 is a perspective view of the combination of the bracket member and the vertical reinforcement used in the present invention.
9 is a combined perspective view of another embodiment of the PC column and beam unit of the present invention.
10 is a perspective view of the combination of the bracket member and the embed plate and the stud bolt used in the present invention.
Figure 11 shows the prefabricated structure of the PC column and beam unit connected in the low moment zone of the present invention.
Figure 12 shows the connection of the pillar in the prefabricated structure of the PC column and beam unit connected in the low moment zone of the present invention.
13 shows the moment acting on the structure with lateral forces.
14 is a partially enlarged view of FIG. 13.
15 shows the moment acting on the structure with normal force.
FIG. 16 is a partially enlarged view of FIG. 15.
17 and 18 is a perspective view of a combination of another embodiment of the PC column and beam unit of the present invention.

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

The prefabricated structure of the PC column and beam unit connected in the low moment zone of the present invention combines the pre-fabricated one or one layer of the PC column and beam unit with each other, and the PC column and beam unit and the other PC pillar and beam unit and In the structure of joining the beam members,

Upper PC column (UC); A lower PC column (DC) installed spaced apart from the upper PC column (UC); A plurality of column reinforcement bars (CB) vertically arranged between the upper PC column (UC) and the lower PC column (DC); A bracket member 110 horizontally inserted into the spaced space between the upper PC column UC and the lower PC column DC; A lower bracket concrete 120 which is installed by being poured under the bracket member 110; A joint concrete (200) placed between the spaced space between the upper PC column (UC) and the lower PC column (DC) and the bracket lower concrete 120; And a low moment junction connecting member (CP) installed at any one or more of the upper part of the upper PC column (UC) or the lower part of the lower PC column (DC) to form a joining column with other PC columns and beam units. PC column and beam unit configured by

The bracket lower concrete 120 and the joint concrete 200 are integrally placed so that the PC pillar and the beam unit of one section or one layer are pre-fabricated, and the upper and lower PC pillars of the upper PC pillar UC ( The lower part of DC) is located in the pillar low moment zone (CLM) where the moment acting on the pillar is small or minimum throughout the building, and both ends of the bracket member 110 have the moment due to the vertical load acting on the beam throughout the building. Located in the small or minimum beam moment zone (BLM) is characterized in that the coupling with the other PC column and beam unit and the beam member (B) is made where the moment is small or minimum.

Figure 2 is a combined perspective view of the PC column and beam unit of the present invention, Figures 3, 6 and 9 are combined perspective views of another embodiment of the PC column and beam unit of the present invention.

PC column and beam unit of the present invention as shown in Figure 2, large upper PC column (UC), lower PC column (DC), column reinforcement (CB), bracket member 110, bracket lower concrete 120, It comprises a joint concrete 200 and low moment connection portion connecting member (CP).

The upper PC column (UC) and the lower PC column (DC) has a structure of a PC pillar that is usually manufactured and are spaced apart from each other.

The column reinforcing bars (CB) are vertically arranged between the upper PC column (UC) and the lower PC column (DC) and are extended in the upper PC column (UC) and the lower PC column (DC) to the upper load It serves to deliver the lower part.

Figure 4 is a perspective view of the bracket member used in the present invention.

The bracket member 110 is horizontally inserted into the spaced space between the upper PC column (UC) and the lower PC column (DC), the conventional bracket was installed to protrude a little from the outer surface of the pillar, but the present invention is long It is characterized in that both ends are located in the extended moment zone (BLM). In addition, the bracket member 110 may use all existing steel, such as H-shaped steel, T-shaped steel, inverted T-shaped steel, and may also use a material such as reinforced plastic such as FRP (fiber-reinforced plastic) if only a predetermined strength is ensured. .

The bracket lower concrete 120 is to be installed in the lower portion of the bracket member 110, typically has a structure of a composite beam with the bracket member 110.

And in order to have the composite beam structure, a conventional compensation part root 130, the bottom part 140, a stirrup reinforcement, stud bolts and the like can be installed.

The joint concrete 200 is to be placed between the spaced space between the upper PC column (UC) and the lower PC column (DC) and the bracket lower concrete 120, the upper PC as shown in FIG. The spaces spaced between the column UC and the lower PC column DC may be filled without gaps, and as shown in FIG. 2, the placing height of the joint concrete 200 is the same level as that of the lower bracket concrete 120. The slab concrete may be cast integrally between the upper portion of the joint concrete 200 and the lower portion of the upper PC pillar UC and the upper portion of the bracket member 110.

In the conventional PC structure, after assembling the upper PC column, the lower PC column, and the PC beam to each other, the rebars extending from the PC beam are manually arranged between the upper PC column and the lower PC column and manually connected to each other. In order to pour concrete to perform the same role as the joint concrete 200 of the invention, the complex formwork was performed by hand at high altitude and poured concrete. However, the present invention is characterized by manufacturing a PC member on the ground, including all complicated and dangerous processes in order to solve such a conventional problem.

Figure 5 shows the low moment connecting portion used in the present invention connecting the lower PC column and the upper PC column.

The low moment connecting portion (CP) is installed on any one or more of the upper portion of the upper PC column (UC) or the lower portion of the lower PC column (DC) to form a connection portion with the other PC column and beam unit, any shape And it can be used as a structure, but it is preferable to use the patent invention (Application No. 10-2011-0125079) filed by the applicant and the inventor of the present invention, including the example of Figure 5 (a). And as shown in Figure 5 (b) it can grout the gap in the reinforcement dimension or can be poured concrete.

7 is a combined perspective view of the bracket member and the vertical reinforcement and the upper and lower plates used in the present invention, Figure 8 is a combined perspective view of the bracket member and the vertical reinforcement used in the present invention.

The present invention may be characterized in that the vertical reinforcing material 300 is further included between the lower portion of the upper PC column (UC) and the upper portion of the lower PC column (DC). The vertical reinforcing material 300 serves to transfer the upper load to the bottom by complementing the column reinforcement (CB).

In addition, the upper plate 310 is installed on the upper end of the vertical reinforcement 300 in close contact with the lower portion of the upper PC pillar, as shown in Figure 7 or below, the lower plate 320 is the lower end of the vertical reinforcement 300 It can be installed in close contact with the upper PC column.

In this case, as shown in FIG. 3 or the figure below, the joint concrete 200 may fill the space spaced between the upper plate 310 and the lower plate 320 without gaps.

As shown in FIG. 6 or below, the placing height of the joint concrete 200 is the same level as that of the bracket lower concrete 120, between the upper part of the joint concrete 200 and the lower part of the upper plate 310; It may be characterized in that the slab concrete is poured integrally on the bracket member 110.

Although not shown, the slab concrete refers to concrete that is poured during slab construction such as one deck plate provided with all the members of the present invention.

10 is a perspective view of the combination of the bracket member and the embed plate and the stud bolt used in the present invention.

As shown in FIG. 10, the present invention is characterized in that the center of the bracket member 110 is cut off, and the broken portion is embedded in the joint concrete 200 through an embed plate EP and a stud bolt SB. You can do

11 is a view illustrating a prefabricated structure of a PC pillar and a beam unit connected in the low moment zone of the present invention, and FIG. 12 is a view illustrating a connection portion of a pillar in the prefabricated structure of the PC pillar and the beam unit connected in the low moment zone of the present invention. It is shown. And FIG. 13 shows moments acting on the structure with lateral forces, FIG. 14 is a partially enlarged view of FIG. 13, and FIG. 15 shows moments acting on the structure with vertical forces, and FIG. 16 is part of FIG. 15. It is an enlarged view.

11 to 16, the biggest feature of the present invention is the pre-fabrication of the PC column and beam unit, the upper part of the upper PC column (UC) and the lower part of the lower PC column (DC) in the entire building Located in the column low moment zone (CLM) with a small or minimal moment acting on the column, and both ends of the bracket member 110 have a minimum or minimum moment of the moment due to the vertical load acting on the beam throughout the building. It is located at (BLM) and the coupling with other PC column and beam unit or beam member (B) is made where the moment is small or minimal.

Combination of the compensation peripheral root 130 and the lower peripheral root 140 and the beam member (B) uses a conventional method such as using a coupler or overlapping reinforcing bars as shown in the enlarged view of FIG.

17 and 18 is a perspective view of a combination of another embodiment of the PC column and beam unit of the present invention.

Another embodiment shown in Figures 17 and 18 is a bracket upper concrete 122 is installed is installed on top of the bracket member 110; And, the tension member (T) is embedded in the upper concrete bracket (122); further comprising,

The bracket upper concrete 122 and the bracket lower concrete 120 are integrally placed and installed, and the tension member T is characterized in that a pre-tension or post-tension is introduced. .

In another embodiment of the present invention shown in Figs. 17 and 18, the sheath tube and the anchorage are not shown in the drawings, but means for implementing pre-tension or post-tension are typically used. .

In particular, the embodiment shown in FIG. 18 may be manufactured after drilling a hole in the upper flange and passing the tension member T through the hole when the bracket member 110 is H-shaped steel, T-shaped steel, or the like. At this time, the tension member (T) automatically forms an ideal tensile curve of a gentle type around the pillar line.

In addition, the present invention is an embodiment in which the tension member (T) is omitted in the example shown in Figures 17 and 18 bracket upper concrete 122 is installed on the upper portion of the bracket member 110; The bracket upper concrete 122 and the bracket lower concrete 120 may provide a prefabricated structure of the PC column and beam unit connected in the low moment zone, characterized in that the installation is integrally cast. At this time, the present embodiment, including the example of Figure 17 and 18 can be generated later in the slab concrete (not shown) and construction cold joint, all means can be used to prepare for this, as an example the upper part of the bracket A stud bolt using a rebar or the like may be installed to protrude toward the slab concrete (not shown) in the concrete 122 to engage with the slab concrete (not shown).

In conclusion, the present invention, by inserting the bracket member 110 represented by the steel (Erection Steel) on both ends of the PC column and beam unit and beam, even if the PC is installed only the beam of the transverse resistance system like steel construction regardless of the slab installation The column and beam frames can be installed in the up direction.

In addition, the joint portion of the existing PC frame can cause serious safety problems because only the reinforcement is constructed to withstand construction vertical load or horizontal load, but in the present invention, the steel frame inserted for assembly as described above (Erection) Due to the bracket member 110 represented by Steel), the joints can obtain a quality comparable to that of the steel frame, thereby securing the safety during construction and implementing the hybrid PC frame building having the steel frame after completion.

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.

Therefore, the claims of the present invention include modifications and variations that fall within the true scope of the invention.

HM: high moment zone
CLM: Column low moment zone
BLM: Beam Moment Zone
UC: Upper PC Column
DC: Lower PC Column
CB: Column Reinforcement
B: beam member
CP: low moment connector
EP: Embed Plate
SB: Stud Bolt
T: tension material
110: bracket member
120: lower bracket concrete
122: concrete on the upper bracket
130: compensation
140: lower back
200: joint concrete
300: vertical reinforcement
310: upper plate
320: lower plate

Claims (12)

In the structure of coupling the pre-fabricated one or one layer of the PC column and beam unit with each other and the other PC column and beam unit and beam member to the PC column and beam unit,
Upper PC column (UC);
A lower PC column (DC) installed spaced apart from the upper PC column (UC);
A plurality of column reinforcement bars (CB) vertically arranged between the upper PC column (UC) and the lower PC column (DC);
A bracket member 110 horizontally inserted into the spaced space between the upper PC column UC and the lower PC column DC;
A lower bracket concrete 120 which is installed by being poured under the bracket member 110;
A joint concrete (200) placed between the spaced space between the upper PC column (UC) and the lower PC column (DC) and the bracket lower concrete 120; And
A low moment connection part connecting member (CP) installed at any one or more of the upper part of the upper PC column (UC) or the lower part of the lower PC column (DC) to form a joining column with other PC columns and beam units;
PC pillar and beam unit configured to include,
The bracket lower concrete 120 and the joint concrete 200 is integrally cast so that the PC column and beam unit of one section or one layer are pre-fabricated,
The upper part of the upper PC column (UC) and the lower part of the lower PC column (DC) is located in the pillar low moment zone (CLM) of the moment or the minimum moment acting on the pillar in the whole building and of the bracket member 110 Both ends are located in the beam moment zone (BLM) where the moment due to the vertical load acting on the beam is small or minimum throughout the building, so that the coupling with other PC columns, beam units, and beam member (B) has a small moment or minimum Prefabricated structure of the PC column and beam unit connected in the low moment zone, characterized in that made in place.
In claim 1,
Prefabricated structure of the PC column and beam unit connected in the low moment zone, characterized in that the vertical reinforcement 300 is further included between the lower portion of the upper PC column (UC) and the upper portion of the lower PC column (DC).
In claim 2,
The upper plate 310 is installed on the upper end of the vertical reinforcement 300 in close contact with the lower upper PC pillar (UC), the lower plate 320 is the lower PC column (DC) at the lower end of the vertical reinforcement 300 Prefabricated structure of the PC column and beam unit connected in the low moment zone, characterized in that is installed in close contact with the top.
3. The method according to claim 1 or 2,
The center of the bracket member 110 is broken form the PC pillar connected in the low moment zone, characterized in that the broken portion is embedded in the joint concrete 200 through the embed plate (EP) and the stud bolt (SB) And a prefabricated structure of the beam unit.
3. The method according to claim 1 or 2,
The pouring height of the joint concrete 200 is the same level as the lower portion of the bracket 120, integral between the upper portion of the joint concrete 200 and the lower portion of the upper PC pillar (UC) and the upper portion of the bracket member 110 Prefabricated structure of the PC column and beam unit connected in the low moment zone, characterized in that the furnace slab concrete is cast.
4. The method of claim 3,
The pouring height of the joint concrete 200 is the same level as the lower portion of the bracket 120, the slab concrete integrally between the upper portion of the joint concrete 200 and the lower plate 310 and the upper bracket member 110. Prefabricated structure of the PC column and beam unit connected in the low moment zone, characterized in that the pouring.
3. The method according to claim 1 or 2,
Bracket upper concrete 122 is installed on the top of the bracket member 110;
The bracket upper concrete 122 and the bracket lower concrete 120 is assembled prefabricated structure of the PC pillar and beam unit connected in the low moment zone, characterized in that the installation is integrally installed.
4. The method of claim 3,
Bracket upper concrete 122 is installed on the top of the bracket member 110;
The bracket upper concrete 122 and the bracket lower concrete 120 is assembled prefabricated structure of the PC pillar and beam unit connected in the low moment zone, characterized in that the installation is integrally installed.
5. The method of claim 4,
Bracket upper concrete 122 is installed on the top of the bracket member 110;
The bracket upper concrete 122 and the bracket lower concrete 120 is assembled prefabricated structure of the PC pillar and beam unit connected in the low moment zone, characterized in that the installation is integrally installed.
In claim 7,
Tensile material (T) is embedded in the upper concrete bracket (122); further comprising,
The bracket upper concrete 122 and the bracket lower concrete 120 is integrally placed and installed, and the tension member T is characterized in that pre-tension or post-tension is introduced. Prefabricated structure of PC column and beam unit connected in low moment zone.
9. The method of claim 8,
Tensile material (T) is embedded in the upper concrete bracket (122); further comprising,
The bracket upper concrete 122 and the bracket lower concrete 120 is integrally placed and installed, and the tension member T is characterized in that pre-tension or post-tension is introduced. Prefabricated structure of PC column and beam unit connected in low moment zone.
The method of claim 9,
Tensile material (T) is embedded in the upper concrete bracket (122); further comprising,
The bracket upper concrete 122 and the bracket lower concrete 120 is integrally placed and installed, and the tension member T is characterized in that pre-tension or post-tension is introduced. Prefabricated structure of PC column and beam unit connected in low moment zone.

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