KR20240154900A - Beam-column joint using hybrid mounting bracket - Google Patents

Abstract

The present invention relates to a column-beam joint structure using a hybrid mounting bracket, which can easily join a factory-manufactured beam to a column by pouring concrete while placing the end of the beam, which is combined with a pressure support member protruding downward at both ends, inside a hybrid mounting bracket with a U-shaped cross-section provided on one side of the column, shortening the construction period, and having excellent joint structural performance.
The column-beam joint structure using the hybrid mounting bracket of the present invention is for installing a beam between a pair of columns that are installed so as to be spaced apart from each other, and is characterized in that a hybrid mounting bracket formed in a U-shaped cross-section with an open upper portion is provided on one side of the column so as to receive and place an end of the beam, and a pressure support member whose lower portion protrudes toward the lower portion of the beam is provided on both ends of the beam, and the beam is connected to the hybrid mounting bracket by pouring concrete into the interior of the hybrid mounting bracket.

Description

{Beam-column joint using hybrid mounting bracket}

The present invention relates to a column-beam joint structure using a hybrid mounting bracket, which can easily join a factory-manufactured beam to a column by pouring concrete while placing the end of the beam, which is combined with a pressure support member protruding downward at both ends, inside a hybrid mounting bracket with a U-shaped cross-section provided on one side of the column, shortening the construction period, and having excellent joint structural performance.

Conventional reinforced concrete structures (RC structures) are constructed by installing formwork on site, placing reinforcing bars inside the formwork, and then pouring and curing concrete. At this time, a lot of on-site manpower is required for the formwork and reinforcing bars, and the concrete curing and formwork dismantling process is required, so not only does it take a long time, but it is also difficult to ensure uniform quality.

In addition, external scaffolding materials such as long wires, yokes, and braces must be installed to support the formwork, so additional processes for installing and dismantling scaffolding materials must be added, and the scaffolding materials cause inconvenience to the movement of workers.

In particular, large structures with large absences have safety concerns because formwork installation and reinforcement work are done at heights, and the scale of temporary materials installation increases, significantly increasing construction costs.

To solve these problems of the conventional RC method, a prefabricated column with integral formwork (PSRC column) was developed in which a permanent formwork is attached to a CFT column or prefabricated column frame with concrete filled inside the steel pipe (Patent Registration No. 10-1490748).

The above PSRC column is a lightweight permanent formwork fixed to strong horizontal support members and L-shaped steel members. Since the lightweight permanent formwork is pre-attached and installed as a single piece at the factory, on-site reinforcing bar placement work or formwork installation and dismantling processes can be omitted or significantly reduced, shortening the construction period. In addition, the steel members are arranged on the outside of the column, so the lateral performance is excellent, and the column can be self-supporting during installation, minimizing the amount of scaffolding. In addition, since the members are lightweight, the lifting burden is low, and since the steel members are embedded inside the concrete, there is an advantage of not requiring separate fireproofing treatment.

Meanwhile, in order to replace the existing conventional RC beams that are connected to columns during the construction of a structure, various types of beams can be used, such as PC beams, which are precast concrete members, TSC beams that fill the inside of a U-shaped steel plate with concrete, and PSRC beams that have shaped steel placed on the outside of the beam.

When connecting these beams to columns, bolt connections are mainly used.

Bolted joints transmit stresses by friction between the faces of the plates being joined.

At this time, it is stipulated that the minimum gap between bolts be maintained to minimize damage to the cross-section of the parent material due to bolt hole perforation.

In addition, when friction bonding, the surface must be treated with sandblasting or similar to ensure that the coefficient of friction of the bonding surface is 0.5 or higher, and it is essential to prevent contamination from oil, moisture, dust, paint, etc.

In addition, joint plates must be added to both sides of the absence for friction joints. In the case of H-shaped steel, a total of 8 joint plates (3 each for the upper and lower flanges, and 2 for the web) are required, which requires a lot of steel and is very cumbersome to process.

In addition, bolt joints require a lot of work time because there are many fastening points, and a crane is required until the jointing work is completed, which hinders the operation of heavy equipment. In addition, since the jointing is done at high altitudes, there is a risk of worker safety accidents.

In addition, a bracket is provided on one side of the column to connect the column and beam. However, if the shapes of the column and beam members are different, the bracket as well as the end details of the beam member must be different depending on the type of beam, which reduces the manufacturability and complicates the joint details.

In order to solve the above problems, the present invention aims to provide a column-beam joint structure using a hybrid mounting bracket that facilitates joint construction, shortens the construction period, and has excellent joint structural performance when joining a beam manufactured in a factory and assembled on-site to a column.

The present invention according to a preferred embodiment provides a column-beam connection structure using a hybrid mounting bracket, characterized in that the column is provided with a U-shaped cross-section having an open upper portion and in which an end of the beam is received and placed, and a pressure support member having a lower portion protruding toward the lower portion of the beam is provided at both ends of the beam, and concrete is poured into the hybrid mounting bracket to connect the beam to the hybrid mounting bracket.

According to another preferred embodiment, the present invention provides a column-beam connection structure using a hybrid mounting bracket, characterized in that the hybrid mounting bracket comprises four horizontal molded steel members spaced apart from each other in the vertical, horizontal, left, and right directions and having one end joined to one side of a column, a vertical connecting bar for interconnecting the horizontal molded steel members adjacent to each other in the vertical direction, a horizontal connecting bar for interconnecting the horizontal molded steel members adjacent to each other in the lower left and right directions, and a lightweight permanent formwork connected to the outer side of the vertical connecting bar and the lower side of the horizontal connecting bar.

According to another preferred embodiment, the present invention provides a column-beam joint structure using a hybrid mounting bracket, characterized in that a pedestal on which a beam is mounted is provided between a pair of horizontal cast steel members positioned at the bottom, and a pressure support member of the beam is provided on the inner side of the pedestal so as to be spaced apart from the pedestal.

According to another preferred embodiment, the present invention provides a column-beam joint structure using a hybrid mounting bracket, characterized in that a horizontal fixing member having one end joined to a column is provided longitudinally on an upper side inside the hybrid mounting bracket, a first joining plate is coupled to an outer end of the horizontal fixing member, and a second joining plate is provided on an upper side of an end of the beam at a position corresponding to the first joining plate, such that the first joining plate and the second joining plate are joined to each other by a joining bolt.

According to another preferred embodiment of the present invention, a column-beam joint structure using a hybrid mounting bracket is provided, characterized in that the first joint plate and the second joint plate are provided to be spaced apart from each other, and a compression bolt is connected to one of the first and second joint plates so that an end thereof is supported by the other joint plate and passes through the joint plate.

According to another preferred embodiment, the present invention provides a column-beam joint structure using a hybrid mounting bracket, characterized in that guide plates inclined downwardly inwardly are respectively provided on both lower sides inside the hybrid mounting bracket to guide the lower end of the beam.

According to another preferred embodiment, the present invention provides a column-beam joint structure using a hybrid mounting bracket, characterized in that the front end of the hybrid mounting bracket is formed in a U shape by comprising a lower plate and side plates protruding from the upper sides of both sides of the lower plate, a fixed rib formwork is provided on the inner side of the side plates spaced apart from the side surface of the beam, and a variable rib formwork is provided on the front surface of the side plates of the fixed rib formwork so as to be slidably moved left and right.

According to another preferred embodiment, the present invention provides a column-beam joint structure using a hybrid mounting bracket, characterized in that the hybrid mounting bracket is formed such that its width increases toward the column side in a plane.

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

First, a column-beam joint structure using a hybrid mounting bracket can be provided, which enables easy on-site construction of factory-manufactured beams by placing the end of the beam inside a U-shaped cross-section hybrid mounting bracket with an open upper portion provided on one side of the column and pouring concrete therein.

Second, the lower portion of the pressure support member protruding from the lower portion of the beam is provided at both ends of the beam, and is embedded in the concrete poured inside the hybrid mounting bracket and interlocked. Accordingly, not only is the shear force and lower compressive force of the beam stably supported, but when a tensile force is applied to the lower portion of the beam, the tensile force can be borne by the pressure force between the pressure support member and the concrete in front of the pressure support member, so that the structural performance of the joint is excellent.

Third, bolting and other joining processes can be omitted or minimized when joining columns and beams, and can be applied regardless of the type of beam member. Since the beam end is accommodated and installed inside the hybrid mounting bracket, installation is possible without separate temporary materials. In addition, since the joint area is not exposed to the outside, on-site fireproofing work can be omitted. Accordingly, the construction period can be shortened.

Figure 1 is a perspective view showing a hybrid mounting bracket attached to a pillar.
Figure 2 is a perspective view showing a state in which a beam is attached to a hybrid mounting bracket.
Figure 3 is a perspective view showing a dam equipped with a pressure relief area.
Figure 4 is a perspective view showing the relationship between the acupressure support area and the beam.
Figure 5 is a cross-sectional side view illustrating the process of joining a hybrid mounting bracket and a beam.
Figure 6 is a cross-sectional side view showing the state of the hybrid mounting bracket and the bow.
Figure 7 is a cross-sectional side view showing concrete poured inside the hybrid mounting bracket.
Figure 8 is a perspective view illustrating a hybrid mounting bracket composed of a horizontal profile steel member and a connecting bar.
Figure 9 is a cross-sectional view showing a state in which a beam is installed on the upper part of a pedestal.
Figure 10 is a cross-sectional view showing a state in which horizontal fixing members are combined.
Figure 11 is a perspective view showing the state in which the first and second joining plates are joined by joining bolts.
Figure 12 is a plan view showing a state in which the first and second joining plates are joined by joining bolts.
Fig. 13 is a perspective view showing a guide plate.
Figure 14 is a cross-sectional view showing a state in which a guard is installed between guide plates.
Figure 15 is a perspective view showing the joint relationship of the formwork.
Figure 16 is a perspective view showing the state of jointing of the formwork.
FIG. 17 is a plan view illustrating an embodiment having a trapezoidal hybrid mounting bracket.
Figure 18 is a plan view showing a state in which beams are connected to four sides of a column by hybrid mounting brackets.

Hereinafter, the present invention will be described in detail with reference to the attached drawings and preferred embodiments.

FIG. 1 is a perspective view illustrating a state in which a hybrid mounting bracket is coupled to a column, FIG. 2 is a perspective view illustrating a state in which a beam is coupled to the hybrid mounting bracket, FIG. 3 is a perspective view illustrating a beam provided with a pressure support member, and FIG. 4 is a perspective view illustrating a coupling relationship between the pressure support member and the beam. In addition, FIG. 5 is a side sectional view illustrating a coupling process between the hybrid mounting bracket and the beam, FIG. 6 is a side sectional view illustrating a state in which the hybrid mounting bracket and the beam are coupled, and FIG. 7 is a side sectional view illustrating a state in which concrete is poured inside the hybrid mounting bracket.

As illustrated in FIGS. 1 to 7, the column-beam joint structure using the hybrid mounting bracket of the present invention is characterized in that it is for installing a beam (2) between a pair of columns (1) that are installed spaced apart from each other, and a hybrid mounting bracket (3) formed in a U-shaped cross-section with an open upper portion on one side of the column (1) is provided to receive and mount an end of the beam (2), and a pressure support member (21) is provided on both ends of the beam (2) so that the lower portion thereof protrudes below the beam (2), and concrete (4) is poured into the interior of the hybrid mounting bracket (3) so that the beam (2) is joined to the hybrid mounting bracket (3).

The present invention provides a column-beam joint structure using a hybrid mounting bracket that facilitates joint construction, shortens the construction period, and has excellent joint structural performance when joining a beam (2) manufactured in a factory and assembled on site to a column (1).

The present invention is to first connect a prefabricated beam (2) to one side of an installed column (1).

The above column (1) may be a PSRC column, a CFT column, etc., and the above beam (2) may be a PC beam, a TSC beam, a steel beam, a PSRC beam, etc.

A hybrid mounting bracket (3) is provided on one side of the above pillar (1).

The above hybrid mounting bracket (3) is formed with a U-shaped cross-section with an open upper portion, and the end of the beam (2) is inserted and mounted from the upper portion.

The above hybrid mounting bracket (3) can be formed by bending or welding a steel plate.

Concrete (4) is poured into the interior of the hybrid mounting bracket (3) and the end of the beam (2) is fixedly connected to the interior of the hybrid mounting bracket (3).

That is, the above-mentioned beam (2) is installed to overlap the hybrid mounting bracket (3) by a certain length, and the overlapping portion is filled with concrete (4) to become integrated with each other (Fig. 7, etc.).

Accordingly, since the beam (2) can be joined by simply pouring concrete (4) inside the hybrid mounting bracket (3), joining processes such as bolting can be omitted or minimized. In addition, since the end of the beam (2) is inserted into the inside of the hybrid mounting bracket (3) and placed therein and then integrated by pouring concrete (4), it can be applied regardless of the type of member of the beam (2).

In addition, since the above-mentioned beam (2) is installed by being accommodated in the interior of the hybrid mounting bracket (3), it can be installed without separate temporary materials, and since the fastening of the lifting mechanism connected to the lifting equipment can be dismantled immediately after installation, the time for using the lifting equipment can be significantly reduced.

In order to resist the end moment, upper anchorage reinforcing bars extending toward the column (1) can be placed on the upper part of the above-mentioned beam (2).

Since the shear force of the above beam (2) is directly transmitted from the portion mounted on the hybrid mounting bracket (3), a shear bolt is unnecessary, and the lower compressive force of the beam (2) is borne by the concrete (4) poured inside the hybrid mounting bracket (3).

However, when load inversion occurs due to an earthquake load, etc., a tensile force may be applied to the lower part of the beam (2). At this time, while the upper part of the beam (2) can have upper anchorage reinforcement embedded in the slab, it is difficult to arrange lower anchorage reinforcement to bear the lower tensile force of the lower part of the beam (2).

Therefore, a pressure support area (21) is installed at both ends of the above-mentioned guard (2).

The above-mentioned acupressure support member (21) protrudes a predetermined length from the lower portion of the beam (2) (Fig. 3, Fig. 5) and is embedded in and interlocked with the concrete (4) poured inside the hybrid mounting bracket (3) (Fig. 7).

Accordingly, when a tensile force is applied to the lower portion of the beam (2), the tensile force can be borne by the pressure between the pressure support member (21) and the concrete (4) in front of the pressure support member (21) even without the lower tensile reinforcement bar.

The above acupressure support area (21) can be composed of a pressure plate (211) and a rib reinforcement plate (212) (Fig. 3, Fig. 4).

The upper part of the above pressure plate (211) is fixed to the end of the beam (2).

The lower part of the above pressure plate (211) protrudes toward the lower part of the beam (2) and exerts pressure by coming into contact with the concrete (4) at the lower part of the beam (2).

The above pressure plate (211) can be fixed to the end of the beam (2) by welding or bolting.

In the case where the above-mentioned bow (2) is a PC, the lower part (20) inside the bow (2) can be protruded to the end of the bow (2) and the pressure plate (211) can be penetrated, and a nut (213) can be fastened to the screw thread formed on the outer surface of the end of the lower part (20) to fix the pressure support member (21) to the end of the bow (2). In order to disperse the stress around the nut (213), a washer plate (214) can be provided between the pressure plate (211) and the nut (213).

When a pressure force is applied to the above-mentioned acupressure plate (211), a bending moment may be applied to the acupressure plate (211), causing a bending deformation. If this is supported only by the acupressure plate (211), the thickness of the acupressure plate (211) may become excessively thick.

Therefore, by combining a rib reinforcement plate (212) to one side of the pressure plate (211), the flexural rigidity of the pressure plate (211) can be reinforced.

The above rib reinforcement plates (212) can be arranged in multiple rows in the vertical direction. In some cases, rib reinforcement plates (212) can be additionally arranged in the horizontal direction.

As shown in Figure 3, the pressure plate (211) may be formed of a T-shaped steel, but is not limited thereto and may be formed into various cross-sectional shapes.

In the past, when installing refractory coating in a factory, the joint part was omitted and pre-work was done, and then the joint part was worked on-site.

In the present invention, since the joint of the beam (2) is formed inside the hybrid mounting bracket (3), the joint portion is not exposed to the outside but is buried. Accordingly, the fireproof coating of the beam (2) can be 100% pre-worked at the factory, and on-site fireproof coating work can be omitted.

Figure 8 is a perspective view illustrating a hybrid mounting bracket composed of horizontal molded steel members and connecting bars.

As shown in FIG. 1, FIG. 8, etc., the hybrid mounting bracket (3) may be composed of four horizontal molded steel members (31) spaced apart from each other in the vertical, horizontal, left, and right directions and having one end joined to one side of a column (1), a vertical connecting bar (32a) that interconnects the horizontal molded steel members (31) adjacent to each other in the vertical direction, a horizontal connecting bar (32b) that interconnects the horizontal molded steel members (31) adjacent to each other in the lower direction, and a lightweight permanent formwork (33) that is joined to the outside of the vertical connecting bar (32a) and the lower part of the horizontal connecting bar (32b).

The above hybrid mounting bracket (3) may be composed of a horizontal cast steel member (31), a vertical connecting bar (32a), and a horizontal connecting bar (32b) to support the load of the beam (2) and transmit it to the column (1) while reducing the weight of the member.

The above horizontal mold steel members (31) are provided in four pieces spaced apart from each other in the upper, lower, left, and right directions.

The above horizontal molded steel member (31) may be formed as an L-shaped steel member and provided on each corner side of the hybrid mounting bracket (3).

If the above column (1) is a PSRC column with vertical molded steel (11) arranged at the corner, the horizontal molded steel (31) may be provided to penetrate the column (1) horizontally and protrude outwardly from the side of the column (1) (see FIG. 1, etc.).

Horizontal molded steel members (31) arranged spaced apart from each other can be interconnected by horizontal connecting bars (32b) and vertical connecting bars (32a).

The above vertical connecting bar (32a) connects a pair of horizontal molded steel members (31) adjacent to each other vertically.

The above horizontal connecting bar (32b) connects a pair of horizontal molded steel members (31) positioned left and right from the bottom.

The above vertical connecting bar (32a) and horizontal connecting bar (32b) can be provided on the outside of the horizontal mold steel material (31).

The above vertical connecting bar (32a) and horizontal connecting bar (32b) are each formed with an L-shaped cross section, so that the outer surface of one leg can be bolted to the outer surface of the horizontal molded steel material (31).

A lightweight permanent formwork (33) can be combined on the outside of the vertical connecting bar (32a) and the horizontal connecting bar (32b).

That is, the above lightweight permanent formwork (33) is connected to the outer surface of the upper and lower horizontal molded steel members (31) and the lower surface of the lower two-sided horizontal molded steel members (31), respectively, so as to form an overall U-shape with an open upper portion.

On the back surface of the above lightweight permanent formwork (33), an L-shaped or T-shaped catch portion is formed, and a catch groove portion is formed in which the catch portion is inserted and caught in the vertical connecting bar (32a) and the horizontal connecting bar (32b), so that they can be mutually connected.

The above vertical connecting bar (32a) and horizontal connecting bar (32b) connect the horizontal molded steel members (31) to each other to maintain the shape and secure the lightweight permanent formwork (33), while spacing the lightweight permanent formwork (33) away from the horizontal molded steel members (31) to secure concrete cover.

On both sides of the above hybrid mounting bracket (3), a member (34) connecting the upper and lower horizontal molded steel members (31) may be provided.

The above-mentioned material (34) can be configured to form a truss structure by connecting the end portion to the point where the vertical connecting bar (32a) and the horizontal molded steel material (31) are joined.

The load of the beam (2) can be shared between the upper and lower horizontal molded steel members (31) by the vertical connecting bar (32a) and the brace (34) connecting the upper and lower horizontal molded steel members (31).

Figure 9 is a cross-sectional view showing a state in which a beam is installed on the upper part of a pedestal.

As shown in Fig. 9, a seat (35) on which a beam (2) is placed is provided between a pair of horizontal molded steel members (31) located at the bottom, and the pressure support member (21) of the beam (2) can be provided on the inside of the seat (35) so as to be spaced apart from the seat (35).

After the inside of the above hybrid mounting bracket (3) is filled with concrete (4) and becomes integral with the end of the beam (2), the load is supported by the concrete. However, before the concrete is poured, the load of the beam (2) must be supported by the flexural rigidity of the horizontal molded steel (31).

At this time, a beam (2) may be installed on the upper portion of the horizontal connecting bar (32b) so that the load of the beam (2) may be transferred to the lower horizontal molded steel member (31) by the horizontal connecting bar (32b). However, the horizontal connecting bar (32b) connects the horizontal molded steel member (31) and is embedded in the concrete (4) inside the hybrid mounting bracket (3) to act as a stirrup, and thus corresponds to a tensile member. Therefore, the horizontal connecting bar (32b) does not need to have a large cross-sectional size, and thus, since the bending rigidity and shear rigidity are insufficient, it may be difficult to support the load of the beam (2) and transfer it to the lower horizontal molded steel members (31) on both sides.

Accordingly, a pedestal (35) can be fixedly installed between a pair of horizontal molded steel members (31) on the left and right sides located at the bottom to support the beam (2) accommodated and installed inside the hybrid mounting bracket (3) so as to cross the horizontal molded steel members (31).

At this time, the pressure support member (21) provided at the end of the above-mentioned beam (2) can be positioned so as to be spaced apart from the inner side of the pedestal (35), that is, closer to the pillar (1), so that concrete (4) can be filled between the pressure support member (21) and the pedestal (35).

Accordingly, when tensile force occurs at the lower end of the beam (2), the tensile force can be supported by the concrete compressive force between the pressure support member (21) and the seat (35).

The above-mentioned seat (35) can be formed as an H-shaped cross-section by assembling a T-shaped steel, an H-shaped steel, or a pair of T-shaped steels by pressing them left and right.

A support pad may be provided on the upper surface of the above pedestal (35) to prevent damage or slipping of the member when the support (2) is placed on the upper surface.

If the load of the above-mentioned beam (2) is not large or the cross section of the horizontal connecting bar (32b) is sufficient, the horizontal connecting bar (32b) can be used as a pedestal.

Fig. 10 is a side cross-sectional view showing a state in which horizontal fixing members are joined, Fig. 11 is a perspective view showing a state in which the first and second joining plates are joined by joining bolts, and Fig. 12 is a plan view showing a state in which the first and second joining plates are joined by joining bolts.

As shown in FIGS. 10 to 12, a horizontal fixing member (36) having one end joined to a pillar (1) is provided in the longitudinal direction on the upper side inside the hybrid mounting bracket (3), a first joining plate (37) is coupled to an outer end of the horizontal fixing member (36), and a second joining plate (22) is provided on the upper side of the end of the beam (2) at a position corresponding to the first joining plate (37), so that the first joining plate (37) and the second joining plate (22) can be joined to each other by a joining bolt (5).

When the above column (1) has a closed cross-section like a CFT column, it is difficult to secure the upper reinforcement to resist the parent moment at the column-beam joint toward the column (1).

Therefore, a horizontal fixing member (36) can be pre-assembled on the inner upper side of the hybrid mounting bracket (3) and the end of the beam (2) can be connected by joining it to the horizontal fixing member (36).

The above horizontal fixing member (36) has one end fixed or anchored to the pillar (1).

If the above column (1) is a CFT column, one end of the horizontal fixing member (36) can be fixed to one side of the column (1) by welding or the like.

If the above column (1) is a PSRC column, the horizontal fixing member (36) can penetrate the inside of the PSRC column and be fixed inside the column (1).

In order to join the upper end of the above-mentioned beam (2) to the horizontal fixing member (36), a first joining plate (37) may be provided on the outer end of the horizontal fixing member (36), and a second joining plate (22) may be provided on the upper end of the beam (2) at a corresponding position.

Accordingly, after installing the above-mentioned guard (2), the first joining plate (37) and the second joining plate (22) can be joined to each other by fastening a plurality of joining bolts (5).

A plurality of through holes through which the joining bolts (5) pass may be formed in the first joining plate (37) and the second joining plate (22).

The above horizontal fixing member (36) can be composed of a steel frame such as a L-shaped steel or a steel bar, or a steel plate as shown in Fig. 17 described later.

As shown in FIG. 11 and FIG. 12, the first joining plate (37) and the second joining plate (22) are provided so as to be spaced apart from each other, and a compression bolt (6) whose end is supported by the joining plate on the other side can be connected through the joining plate on one side of the first joining plate (37) and the second joining plate (22).

In the present invention, a pair of columns (1) spaced apart from each other and a hybrid mounting bracket (3) are installed, and a beam (2) is lifted and the end of the beam (2) is inserted through the open upper space of the hybrid mounting bracket (3).

At this time, if there is no clearance between the first joining plate (37) and the second joining plate (22), it is difficult to lower and install the beam (2) between the first joining plates (37) on both sides. Therefore, the length of the horizontal fixing member (36) should be formed short to form clearance between the first joining plate (37) and the second joining plate (22).

However, in this case, when the above-mentioned connecting bolt (5) is fastened to tighten the first connecting plate (37) and the second connecting plate (22), there is a problem that deformation occurs in the column (1) as the horizontal fixing member (36) is pulled by the amount of the clearance.

Accordingly, a compression bolt (6) may be provided so that the first joining plate (37) and the second joining plate (22) can be separated from each other for installation of the bolt (2), while the joining bolt (5) can be joined with sufficient joining force.

The above compression bolt (6) may pass through the second joining plate (22) based on the drawing and one end may be supported on the rear side of the first joining plate (37) (Fig. 12). Conversely, the above compression bolt (6) may pass through the first joining plate (37) and one end may be supported on the front side of the second joining plate (22).

When the above-mentioned joining bolt (5) is tightened, the first joining plate (37) and the second joining plate (22) can be joined without deformation by the support of the compression bolt (6).

At this time, the above-mentioned connecting bolt (5) is a tensile bolt that transmits a load by tensile force. In other words, unlike a friction bolt that requires an impact wrench, the connecting bolt (5), which is a tensile bolt, can be easily tightened by hand by a worker using a hand tool such as a general wrench, so it has excellent workability.

In particular, unlike general bolts that have a large head and thus a large bolt spacing and thus a large joint plate width, by using a KS bolt with a hexagonal groove formed in the head as the above-mentioned joint bolt (5), the bolt spacing and the width of the joint plate can be minimized.

The above compression bolt (6) can be provided on both ends of the second joining plate (22) of the beam (2).

However, for the convenience of construction, the compression bolt (6) may be provided only on one side of the beam (2). In this case, the other side of the beam (2) may be fastened with the joining bolt (5) by closely contacting the second joining plate (22) and the first joining plate (37), and the first joining plate (37) and the second joining plate (22) may be separated on the side where the compression bolt (6) is provided to absorb the clearance.

Fig. 13 is a perspective view showing a guide plate, and Fig. 14 is a cross-sectional view showing a state in which a guard is installed between the guide plates.

As shown in FIG. 8, FIG. 13 and FIG. 14, guide plates (38) that are inclined downwardly inwardly to guide the lower end of the beam (2) may be provided on both lower sides of the hybrid mounting bracket (3).

The present invention is constructed by inserting an end of a beam (2) into the interior of a hybrid mounting bracket (3) having a U-shaped cross-section, and then pouring concrete (4) into the interior of the hybrid mounting bracket (3) so that the end of the beam (2) is embedded in the concrete (4), thereby joining the beam (2).

Therefore, the outer surface of the bow (2) and the inner surface of the hybrid mounting bracket (3) must be spaced apart from each other by a certain distance.

In this case, due to the clearance on both sides of the bolt (2), it may be difficult for the bolt (2) to be accurately positioned in the center inside the hybrid mounting bracket (3) when the bolt (2) is inserted.

Accordingly, a guide plate (38) may be provided on both sides of the inner lower portion of the hybrid mounting bracket (3) to guide the guard (2) to be accurately positioned toward the center of the hybrid mounting bracket (3).

The above guide plate (38) is formed as an inclined surface with an inner surface slanted downward inward, so that the gap between the guide plates (38) on both sides can be formed to be wide at the top and narrow at the bottom.

Accordingly, when the lower end of the beam (2) enters between the guide plates (38) on both sides and the beam (2) is lowered further, the beam (2) is guided by the inclined surfaces of the guide plates (38) on both sides, so that the beam (2) can be accurately positioned in the center of the hybrid mounting bracket (3).

When the above hybrid mounting bracket (3) is configured to include a horizontal molded steel member (31), the guide plate (38) may be provided on the inner side of the lower horizontal molded steel member (31).

A stopper (381) may be formed protruding at the rear of the above guide plate (38) to limit the insertion of the bow (2) into the hybrid mounting bracket (3) beyond a set length.

Figure 15 is a perspective view showing the joint relationship of the end formwork, and Figure 16 is a perspective view showing the joint state of the end formwork.

As shown in FIG. 15 and FIG. 16, the front end of the hybrid mounting bracket (3) is formed in a U shape by being composed of a lower plate (391) and side plates (392) protruding from the upper sides of both sides of the lower plate (391), and a fixed spur form (39a) is provided on the inner side of the side plate (392) spaced apart from the side surface of the beam (2), and a variable spur form (39b) that is coupled to be able to slide left and right can be provided on the front side of the side plate (392) of the fixed spur form (39a).

The front of the above hybrid mounting bracket (3) is opened to allow the bolt (2) to be inserted.

Therefore, when pouring concrete (4) inside the hybrid mounting bracket (3), there is the inconvenience of having to install a separate formwork on the entire space between the beam (2) and the hybrid mounting bracket (3).

Accordingly, it is desirable to pre-assemble the formwork into the open portion in front of the hybrid mounting bracket (3) to minimize on-site work.

However, in this case, since the formwork must be in close contact with the side of the beam (2), it may be difficult to insert the beam (2) if assembled in advance.

Therefore, the formwork can be separated into a U-shaped fixed formwork (39a) that is fixedly connected to the front end of the hybrid mounting bracket (3) and a variable formwork (39b) that is connected to the front of the fixed formwork (39a).

The above fixed formwork (39a) may be composed of a lower plate (391) that closes the open portion of the lower portion of the beam (2) and a pair of side plates (392) that are formed by protruding from the upper portions on both sides of the lower plate (391) to close the open portion of the side of the beam (2).

The above lower plate (391) and side plate (392) may be configured integrally or separately.

The lower plate (391) is configured to be in close contact with the lower portion of the beam (2), and the side plates (392) can be formed so that the gap between the side plates (392) on both sides is larger than the width of the beam (2) for insertion of the beam (2). That is, the inner side of the side plates (392) can be provided to be spaced apart from the side surface of the beam (2) by a certain distance.

Since the above side plate (392) is spaced apart from the beam (2) and a portion of the side of the beam (2) is open, a variable spur formwork (39b) can be attached to this portion.

The above variable spur formwork (39b) can be connected to the side plate (392) so that it can move left and right. To this end, a long hole (393) that is long left and right can be formed in the above variable spur formwork (39b), and a fixing bolt (394) can be fastened to the long hole (393).

When inserting the above-mentioned beam (2) into the hybrid mounting bracket (3), the variable end formwork (39b) can be moved outward to increase the distance between the variable end formworks (39b) on both sides. After inserting the above-mentioned beam (2), the variable end formwork (39b) can be moved inward to adhere to the side of the beam (2), and the fixing bolt (394) can be tightened to fix the variable end formwork (39b) to the fixed end formwork (39a).

In order to prevent paste from leaking between the inner end of the variable saddle formwork (39b) and the beam (2), the variable saddle formwork (39b) can be pressed against the side of the beam (2) by bending the inner end into an L-shape.

A support angle (39c) may be provided on the front surface of the lower plate (391) of the above-mentioned fixed formwork (39a) to prevent paste leakage by contacting the lower surface of the beam (2).

FIG. 17 is a plan view illustrating an embodiment equipped with a trapezoidal hybrid mounting bracket, and FIG. 18 is a plan view illustrating a state in which beams are connected to four sides of a column by the hybrid mounting bracket.

As shown in FIG. 17 and FIG. 18, the hybrid mounting bracket (3) can be formed so that the width increases toward the pillar (1) in the plane.

When the gap between the lightweight permanent formwork (33) of the beam (2) and the hybrid mounting bracket (3) is narrow, it is difficult to pour concrete (4) inside the lightweight permanent formwork (33). Accordingly, if the width of the hybrid mounting bracket (3) is increased to secure a space for pouring concrete, the width protruding outward from the beam (2) increases, reducing usability.

Therefore, in order to facilitate concrete pouring between the beam (2) and the lightweight permanent formwork (33) while reducing the portion protruding to the side of the beam (2), the hybrid mounting bracket (3) can be formed into a trapezoidal shape in plan view.

That is, the hybrid mounting bracket (3) can secure a concrete pouring space by making the width wide on the column (1) side, and can minimize the difference with the width of the beam (2) by making the width narrow on the beam (2) side.

As shown in Fig. 18, when a trapezoidal hybrid mounting bracket (3) is installed on the four sides of a column (1) to form an approximately octagonal shape, the entire surface of the column-beam joint is wrapped by the hybrid mounting bracket (3), so there is no need to install a separate column formwork at the column joint.

1: Column 11: Vertical girder steel
2: Bo 20: Lower back
21: Acupressure support area 211: Acupressure plate
212: Rib reinforcing plate 213: Nut
214: Washer plate 22: Second joint plate
3: Hybrid mounting bracket 31: Horizontal cast steel
32a: vertical connecting bar 32b: horizontal connecting bar
33: Lightweight permanent formwork 34: Private material
35: Pedestal 36: Horizontal fixing member
37: First joint plate 38: Guide plate
381: Stopper 39a: Fixed formwork
39b: Variable angle formwork 39c: Support angle
391: Bottom plate 392: Side plate
393: Jang Gong 394: Fixed Bolt
4: Concrete 5: Joint Bolts
6: Compression bolt

Claims (8)

For installing a beam (2) between a pair of columns (1) installed spaced apart from each other.
On one side of the above pillar (1), a hybrid mounting bracket (3) is provided, which is formed as a U-shaped cross-section with an open upper portion and on which an end of the above beam (2) is received and mounted.
At both ends of the above-mentioned beam (2), a pressure support member (21) is provided whose lower part protrudes from the lower part of the beam (2).
A column-beam connection structure using a hybrid mounting bracket, characterized in that a beam (2) is connected to a hybrid mounting bracket (3) by pouring concrete (4) into the interior of the hybrid mounting bracket (3).
In paragraph 1,
The hybrid mounting bracket (3) is characterized by a column-beam joint structure using a hybrid mounting bracket, wherein the hybrid mounting bracket (3) is composed of four horizontal molded steel members (31) spaced apart from each other in the vertical, horizontal, left, and right directions and having one end joined to one side of a column (1), a vertical connecting bar (32a) that interconnects the horizontal molded steel members (31) adjacent to each other in the vertical and lower directions, a horizontal connecting bar (32b) that interconnects the horizontal molded steel members (31) adjacent to each other in the lower left and right directions, and a lightweight permanent formwork (33) that is joined to the outer side of the vertical connecting bar (32a) and the lower side of the horizontal connecting bar (32b).
In paragraph 2,
A column-beam joint structure using a hybrid mounting bracket, characterized in that a pedestal (35) on which a beam (2) is mounted is provided between a pair of horizontal molded steel members (31) located at the bottom, and a pressure support member (21) of the beam (2) is provided on the inside of the pedestal (35) so as to be spaced apart from the pedestal (35).
In paragraph 1,
A column-beam joint structure using a hybrid mounting bracket, characterized in that a horizontal fixing member (36) having one end joined to a column (1) is provided longitudinally on the upper side of the inside of the hybrid mounting bracket (3), a first joining plate (37) is joined to an outer end of the horizontal fixing member (36), and a second joining plate (22) is provided on the upper side of the end of the beam (2) at a position corresponding to the first joining plate (37), so that the first joining plate (37) and the second joining plate (22) are joined to each other by a joining bolt (5).
In Article 4,
A column-beam joint structure using a hybrid mounting bracket, characterized in that the first joint plate (37) and the second joint plate (22) are provided so as to be spaced apart, and a compression bolt (6) is connected so that an end is supported by the joint plate on the other side of the first joint plate (37) and the second joint plate (22) penetrates the joint plate on one side.
In paragraph 1,
A column-beam joint structure using a hybrid mounting bracket, characterized in that guide plates (38) that are inclined downwardly inwardly are respectively provided on the lower sides of the inside of the hybrid mounting bracket (3) to guide the lower end of the beam (2).
In paragraph 1,
A column-beam joint structure using a hybrid mounting bracket, characterized in that the front end of the hybrid mounting bracket (3) is formed in a U shape by comprising a lower plate (391) and side plates (392) protruding from the upper sides of both sides of the lower plate (391), and a fixed rib formwork (39a) is provided on the inner side of the side plate (392) spaced apart from the side surface of the beam (2), and a variable rib formwork (39b) is provided on the front side of the side plate (392) of the fixed rib formwork (39a) so as to be slidably moved left and right.
In paragraph 1,
A column-beam joint structure using a hybrid mounting bracket, characterized in that the hybrid mounting bracket (3) is formed so that its width increases toward the column (1) side in a plane.

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