KR102365786B1 - Assembly join structure of channel type stiffener reinforced steel beam and rectangular steel column - Google Patents

Abstract

In accordance with the present invention, provided is a prefabricated joining structure of a square steel pipe pillar and a rolled steel beam reinforced with a channel type reinforcement connector, capable of embodying efficient shear resistance by evenly distributing shear stress of a joining part to a flange as well as a web, reducing manufacturing costs through the application of a channel type reinforcement connector, reducing a construction period by enabling rapid construction without welding construction due to a combination process completed with bolt assembly after the lifting of a rolled steel beam, and enabling economical construction by considerably reducing the amount of steel materials for the joining part. In accordance with a proper embodiment of the present invention, in regard to the prefabricated joining structure of a square steel pipe pillar and a rolled steel beam reinforced with a channel type reinforcement connector, which is a structure for joining at least two rolled steel beams with a square steel pipe pillar, shear joining plates are joined in a vertical direction as many as the number of rolled steel beams to be installed in the joining part of the square steel pipe pillar, wherein a plurality of shear bolt coupling holes are formed and arranged in upper and lower parts of the shear joining plates; and a channel type reinforcement connector is joined to an end of the rolled steel beams so as to disperse shear stress of the joining part to a flange and a web of the rolled steel beams, and the channel type reinforcement connector is connected and combined with the shear joining plates through a plurality of shear bolts after being slid into the shear joining plates in a vertical direction.

Description

{Assembly join structure of channel type stiffener reinforced steel beam and rectangular steel column}

The present invention relates to an assembly type joint structure of a section steel beam and a square steel pipe column, and in particular, a channel-type reinforcement connector for increasing shear resistance and realizing effective shear resistance by making the shear stress of the joint evenly distributed not only to the flange but also to the web It is possible to reduce the manufacturing cost by applying the It relates to an assembly-type joint structure of a section steel beam and a square steel pipe column reinforced with one channel-type reinforcing connector.

In general, rectangular steel pipe joints (square column-beam moment joints) are of three types: inner-diaphragm connection, outer-diaphragm connection, and through-diaphragm connection. Moment joints are mainly manufactured and constructed. Such a diaphragm-type joint structure is difficult to manufacture because it requires complicated and detailed welding work depending on the type of each diaphragm in a factory. In addition, since the beam for the bracket joint is welded to the column, the number of members that can be transported per session is small, so that the delivery cost is greatly increased. In addition, when connecting brackets in the field, the amount of padding and high-strength bolts for shear bonding is very large, the assembly period takes a long time during construction, and there are always risks related to the safety of workers, etc. For example, when connecting H-beams, a lot of high-strength bolts are required because they are based on friction bonding resistance of high-strength bolts. For this reason, it is not effective in terms of material cost (overplate, high-strength bolt), construction cost, and construction period. In addition, the amount of work required to tighten bolts while sitting on an H-beam in a high position increases the risk of work safety.

On the other hand, if you look at the principal stress diagram that appears at the junction of a typical rectangular steel pipe column and H-beam as shown in FIG. 7A and FIG. 7B, the principal stress diagram shows that the middle part of the web of the beam hardly transmits stress and is transmitted from the flange portion. there is. Therefore, there is a need to ensure that the stress transmission of the joint is efficiently transmitted not only to the flange but also to the web.

As the background technology of the present invention, as Korea Utility Model Registration No. 0128541 (Patent Document 1), 'a prismatic steel pipe column with excellent joint stiffness and workability and H-beam-column joint structure' has been proposed. In this case, a reinforcing plate is welded to the side of the square steel pipe that is joined to the beam, and an H-beam beam is welded thereon. Reinforcement pieces are attached to the upper and lower joint angles where the H-beam beam and the reinforcing plate are attached. This structure is designed to increase the rigidity of the joint by welding and eliminate the need for a diaphragm.

However, in the background art, defects in welding may occur because the reinforcement plate, the H-beam column and the upper and lower joint angles are installed by welding. Therefore, advanced welding skills are required. In addition, since the H-beam beam is welded, the number of members that can be transported per session is small, which greatly increases the delivery cost.

Korea Registered Utility Model Registration No. 0128541

The present invention realizes effective shear resistance by allowing the shear stress of the joint to be evenly distributed not only to the flange but also to the web, and can reduce the manufacturing cost by applying a channel-type reinforcing connector to increase the shear resistance, and after lifting the beam Assembling of beams and square steel pipe columns reinforced with channel-type reinforcing connectors for economical construction by reducing the amount of steel in the joint and greatly reducing the amount of steel at the joint, as the assembly is completed only by bolting and rapid construction is possible without welding. It aims to provide a type joint structure.

The assembly-type joint structure of a section steel beam and a square steel pipe column reinforced with a channel-type reinforcing connector according to an appropriate embodiment of the present invention is a structure for joining two or more section steel beams to a square steel pipe column, and is installed at the junction of the square steel tube column The shear junction plate is joined in the vertical direction by the number of beams to be formed, and a plurality of shear bolt fastening holes are formed and arranged on the upper and lower parts of the shear junction plate; A channel-type reinforcing connector is joined to the end of the section steel beam so that the shear stress of the joint is distributed and transmitted to both the flange and the web of the section steel beam. It is jointed to the shear junction plate by shear bolts,
The channel-type reinforcing connector is a vertical channel for shear joining having a vertical slot groove for sliding insertion into the shear joint plate, has a trapezoidal cross section, is installed integrally with the upper and lower portions of the vertical channel for shear joining, and is installed with a tension bolt fastening hole at each end What is composed of an upper junction wing and lower junction blade having characterized.

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In addition, the section steel beam is characterized in that its upper flange is welded to the upper joint wing reinforcing plate, its lower flange is to the lower joint wing, and its web is welded to the vertical channel for shear joining.

In addition, general stiffeners are respectively disposed on the non-bonding surfaces generated by the two- or three-sided joining of the section steel beams, and are coupled to the adjacent channel-type reinforcing connectors with tension bolts to have a closed cross-sectional structure.

In addition, in the four-sided joint of the section steel beam, it is characterized in that four channel-type reinforcing connectors are coupled with tension bolts to have a closed cross-sectional structure.

In addition, the upper and lower flanges of the section steel beam are characterized in that each of the beam flanges has cutouts so that plastic deformation is exerted in order to prevent fracture of the joint due to seismic load.

According to the present invention, by applying a channel-type reinforcing connector to the joint, stress transmission is efficiently transmitted not only to the flange of the beam but also to the web, thereby increasing the shear resistance. In addition, the channel-type reinforcing connector can be mass-produced by casting, thereby reducing unit cost. In addition, since only the shear junction plate is installed on the prismatic steel pipe column, it does not occupy a lot of volume, so it is possible to transport a large amount at a time, thereby reducing transportation costs. In addition, since the assembly is completed only with shear bolts and tension bolts after lifting the section steel beam, rapid construction is possible without welding construction, so the construction period is shortened. possible.

The following drawings attached to this specification illustrate preferred embodiments of the present invention, and serve to further understand the technical idea of the present invention together with the detailed description of the present invention, so the present invention is limited to the matters described in the accompanying drawings It should not be construed as being limited.
1A is a perspective view in which a section steel beam reinforced with a channel-type reinforcing connector according to an embodiment of the present invention is assembled on four sides of a square steel pipe column;
Fig. 1B is a plan view of Fig. 1A;
2 is a plan view showing a state in which the section steel beam according to the position of the rectangular steel pipe column of the present invention is assembled in two, three, and four states, respectively.
Figure 3a is a state in which the channel-type reinforcing connector is separated from the rectangular steel pipe column of the present invention.
Figure 3b is a state in which the channel-type reinforcing connector is assembled to the prismatic steel pipe column of the present invention.
Figure 4a is a perspective view of a channel-type reinforcement connector applied to the present invention.
Figure 4b is a perspective view from another angle of the channel-type reinforcement connector shown in Figure 4a.
5 is a perspective view of a general stiffener connected to a channel-type reinforcing connector according to an embodiment of the present invention;
Figure 6 (A), (B) is a state diagram using a triangular haunchi and a horizontal haunchi for assembling the junction when the dance of the shaper beam is different according to the present invention.
Figure 7a is a joint model of a typical prismatic steel pipe column and H-beam.
Figure 7b is a principal stress diagram in the vicinity of the joint shown in the joint model of Figure 7a.
8A is a perspective view of a section steel beam reinforced with a channel-type reinforcing connector according to an embodiment of the present invention, having a beam flange cutout and assembled on four sides of a square steel pipe column;
Fig. 8B is a plan view of Fig. 8A;

Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the accompanying drawings, but the presented embodiments are illustrative for a clear understanding of the present invention, and the present invention is not limited thereto.

The present invention has a joint structure in which two or more section steel beams 14 are joined to a rectangular steel pipe column 12 as shown in FIGS. 1 and 2 .

That is, the shear junction plate 13 is vertically joined to the number of the section steel beams 14 to be installed at the junction of the rectangular steel pipe column 12 . A plurality of shear bolt fastening holes 13a are formed in the upper and lower portions of the shear junction plate 13 and are arranged. Therefore, as shown in Figure 2, in the case of two-sided bonding, two shear junction plates 13 are installed at the junction of the rectangular steel pipe column 12, and in the case of three-sided bonding, the shear junction plate 13 is provided at the junction of the rectangular steel pipe column 12. ), these three are installed.

A channel-type reinforcing connector 15 for distributing and transmitting the main stress (shear stress + bending stress) of the joint portion to the flange and web of the beam 14 is joined to the end of the beam 14 . The channel-type reinforcing connector 15 is fitted to the shear junction plate 13 in a sliding manner in the vertical direction, and then is jointly coupled to the shear junction plate 13 by a plurality of shear bolts 16 .

The channel-type reinforcing connector 15 may be made of steel or casting. As shown in Figs. 4a and 4b, the channel-type reinforcement connector 15 has a vertical channel 151 for shear bonding having a vertical slot groove 151a slidingly inserted into the shear bonding plate 13, a trapezoidal cross section, and vertical for shear bonding The upper and lower junction wings 152 and lower junction wings 153, the upper junction wing 152 and the front end are installed integrally with the upper part and the lower part of the channel 151 and have tension bolt fastening holes 152a and 153a at each end. It consists of an upper joint wing reinforcement plate 154 for connecting and reinforcing the vertical channel 151 for joining, a lower joint wing reinforcement plate 155 for connecting and reinforcing the connection and reinforcement between the lower joint wing 153 and the vertical channel 151 for shear joining. .

At this time, the section steel beam 14 has its upper flange 141 welded to the upper junction wing reinforcing plate 154, and its lower flange 142 is welded to the lower junction wing 153, its web 143 Each is welded to the vertical channel 151 for shear bonding.

Here, as shown in FIG. 2, a general stiffener 15a is disposed on the non-bonding surface generated in the two- or three-sided joining of the section steel beam 14, and is coupled with the adjacent channel-type reinforcing connector 15 and the tension bolt 17. have a structure

Therefore, the assembly type bonding method of the section steel beam 14 according to the present invention can implement all of the two-sided bonding, the three-sided bonding, and the four-sided bonding.

Here, in the case of two-sided bonding or three-sided bonding shown in Fig. 2, the section steel beam 14 is a channel-type reinforcement connector in a sliding manner on the shear junction plate 13 installed on the two or three sides of the rectangular steel pipe column 12. After being fitted through (15), they are joined by the combination of shear bolts 16, and at this time, general stiffeners 15a are disposed on the remaining two or one surfaces where the rectangular steel pipe column 12 is not installed to reinforce the adjacent channel type. It is coupled with the connector 15 and the tension bolt 17 .

As such, the two or three section steel beams 14 have a non-welded rigid coupling structure in which a channel-type reinforcement connector 15 and a general stiffener 15a are coupled to each other through a tension bolt 17 on the upper and lower sides to form a closed cross-section. is installed

On the other hand, in the case of the four-sided bonding shown in Fig. 1, the section steel beam 14 is a channel-type reinforcement connector 15 in a sliding manner to the shear junction plate 13 installed on all four sides of the rectangular steel pipe column 12. After being fitted with a bolt, they are joined by the combination of shear bolts 16, and each channel-type reinforcing connector 15 installed on the four section steel beams 14 is mutually coupled through a tension bolt 17 to form a closed cross section. installed in a combined structure.

As described above, by having the assembly type joint structure of the section steel beam and the square steel pipe column reinforced with the channel-type reinforcing connector of the present invention, it has the following advantages.

First, by applying a channel-type reinforcing connector to the joint, the transmission of shear stress is efficiently transmitted not only to the flange of the beam but also to the web, thereby increasing the shear resistance, thereby improving structural safety.

Second, the channel-type reinforcing connector 15 can be mass-produced by casting, thereby reducing unit cost.

Third, since only the shear junction plate 13 is installed on the prismatic steel pipe column 12, it does not occupy a large volume, so it is possible to transport a large amount at a time, thereby reducing transportation costs.

First, the assembly is completed only with the shear bolts 16 and tension bolts 17 after lifting the section steel beams 14, so rapid construction is possible without welding construction, shortening the construction period, and the amount of steel material (overplate, high-strength bolts) at the junction. etc.) is greatly reduced, making economical construction possible.

On the other hand, if the dances of the beams 14 at the junction are different from each other as shown in FIG. 6 , the joint assembly can be realized after aligning the positions of the tension bolts 17 using the triangular haunchi 19 or the horizontal haunchi 19a. .

In addition, in the present invention, as shown in FIGS. 8a and 8b, the upper flange 141 and the lower flange 142 of the section steel beam 14 are cut off so that plastic deformation is exerted in order to prevent fracture of the joint due to seismic load. It may have parts 141a and 142a.

So far, the present invention has been described in detail with reference to the presented embodiment, but those skilled in the art can make various modifications and variations of the invention without departing from the technical spirit of the present invention with reference to the presented embodiment. will be. The present invention is not limited by these variations and modifications, but is limited only by the claims appended hereto.

12: square steel pipe column
14: beam beam
15: channel type reinforcement connector
151: vertical channel for shear bonding
152: upper joint wing
153: lower joint wing
154: upper joint wing reinforcement plate
155: lower joint wing reinforcement plate

Claims (6)

In the structure of joining two or more section steel beams 14 to the rectangular steel pipe column 12,
The shear junction plate 13 is joined in the vertical direction as much as the number of the section steel beams 14 to be installed at the junction of the rectangular steel pipe column 12, and the shear junction plate 13 has a plurality of shear bolt fastening holes ( 13a) is arranged to form;
A channel-type reinforcing connector 15 is joined to the end of the section steel beam 14 so that the shear stress of the joint is distributed and transmitted to both the flange and the web of the section steel beam 14, and the channel-type reinforcing connector 15 is shear jointed. After being fitted to the plate 13 in a sliding manner in the vertical direction, it is jointly coupled to the shear junction plate 13 by a plurality of shear bolts 16,
The channel-type reinforcing connector 15 has a vertical channel 151 for shear bonding having a vertical slot groove 151a slidingly inserted into the shear bonding plate 13, and a trapezoidal cross-section, the upper portion of the vertical channel 151 for shear bonding. The upper junction wing 152 and the lower junction wing 153, the upper junction wing 152 and the vertical channel 151 for shear joining are installed integrally with the lower part and have tension bolt fastening holes 152a and 153a at each end. ) for connecting and reinforcing the upper joint wing reinforcement plate 154, the lower joint wing 153 and the lower joint wing reinforcing plate 155 for connecting and reinforcing the vertical channel 151 for shear joint channel type reinforcement An assembly-type joint structure between a beam and a square steel pipe column reinforced with a connector. delete The method of claim 1,
The section steel beam 14 has its upper flange 141 on the upper junction wing reinforcement plate 154, its lower flange 142 on the lower junction wing 153, and its web 143 on the vertical channel for shear joining ( 151), an assembly type joint structure of a section steel beam and a square steel pipe column reinforced with a channel-type reinforcing connector, characterized in that they are welded to each other. The method of claim 1,
General stiffeners 15a are respectively disposed on the non-bonding surfaces generated by the two- or three-sided joining of the section steel beam 14, and are combined with the adjacent channel-type reinforcing connectors 15 and tension bolts 17 to form a closed cross-sectional structure. An assembly type joint structure of a section steel beam and a square steel pipe column reinforced with a channel-type reinforcing connector, characterized in that it has. The method of claim 1,
In the four-sided junction of the section steel beam 14, the section steel beam and the square steel pipe column reinforced with the channel-type reinforcing connector, characterized in that four channel-type reinforcing connectors 15 are coupled with tension bolts 17 to have a closed cross-section structure. of the assembled joint structure. The method of claim 1,
The upper flange 141 and the lower flange 142 of the beam 14 have beam flange cutouts 141a and 142a, respectively, so that plastic deformation is exerted in order to prevent fracture of the joint due to seismic load. An assembly type joint structure between a section steel beam and a square steel pipe column reinforced with a channel-type reinforcing connector.

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