KR102076132B1 - Gridded Shear Reinforcing Device At the Connection Between Flat Plate Slab and Steel Column - Google Patents

Abstract

The present invention provides a grid shear reinforcing structure for a connection unit of a steel frame column and a concrete flat slab, capable of facilitating construction of a connection unit of a steel frame column and a concrete flat slab in a construction field and efficiently transferring shear stress. According to the embodiment of the present invention, the grid shear reinforcing structure for a connection unit of a steel frame column and a concrete flat slab includes: the steel frame column (10); a slab (20) forming a floor plate by being bonded to the steel frame column (10); and a shear reinforcing member (40) installed in the connection unit between the steel frame column (10) and the slab (20) and forming a load path transferring a shear force in a gravity direction based on the load of the slab (20) to the steel frame column (10). The shear reinforcing member (40) includes: multiple shear support units (200) extended to cross each other and fixed in a grid shape around the steel frame column (10); a reinforcing unit (100) coupled by being inserted into a front end of the shear support unit (200) and embedded into the slab (20); and a height determining unit (300) connected to one of the reinforcing unit (100) or the shear support unit (200) and hanging the reinforcing unit (100) inserted into the shear support unit (200) to perform temporary assembly and determine a position.

Description

Gridded Shear Reinforcing Device At the Connection Between Flat Plate Slab and Steel Column}

The present invention relates to a lattice type shear reinforcement structure of a concrete flat plate slab and a steel column joint to cope with the shear stress generated at the joint between the concrete flat plate slab and the steel column.

In recent years, in connecting a column and a base plate member, attention has been paid to a flat plate structure having good workability and cost-saving effect, that is, a method of directly transferring a load of a bottom plate slab to a column without a beam. .

However, the slab and column joints of flat plate structure are vulnerable to shearing force, especially Punching shear, and in most cases, reinforced concrete columns are used to secure the integrity of the joints and to transfer the shearing force. The reality is that the case is very hard to find. This will be described with reference to FIG. 1.

1 is a view schematically showing the cheolgolbo and the steel pillar joint is inserted into the slab of the conventional flat plate structure.

Referring to FIG. 1, when the steel column is loaded with a slab load (P) to the steel beam, tensile and compressive deformation simultaneously occur. That is, the upper portion of the steel column is caused by the deformation of the force is applied to the pull due to the tensile force due to the load of the slab, the lower side is applied to the inner side by the compressive force, the deformation occurs.

In addition, steel columns have advantages such as shortening of air and ease of construction of large spaces compared to reinforced concrete columns.However, it is difficult to secure the integrity of the joints between steel columns manufactured at the factory and concrete slabs cast in the field. It is not being adopted.

However, in some cases, the shear reinforcing structure is installed on the upper part of the steel column, but in this case, the shear reinforcing structure is manufactured and attached to the steel column at the factory and transported and installed on the site. It takes a lot of transportation costs due to transportation, and there is a high possibility of deformation of the product due to vibration and shock.

In addition, since the weight of the steel column structure is increased, the need for additional input of large heavy equipment and manpower has a problem that increases the construction cost.

Korean Unexamined Patent Publication No. 10-2011-0083449 (2011.07.20)

Therefore, the present invention was devised to solve the above-mentioned conventional problems, and an object of the present invention is easy to field construction at the junction between the steel column and the concrete flat plate slab and the concrete flat plate slab and steel frame capable of efficient shear stress transmission It is to provide a grid-like shear reinforcement structure of the column joint.

In addition, another object of the present invention is to reduce the volume and weight during transportation and installation by minimizing the portion attached to the steel column, concrete that can provide not only shear force but also the performance corresponding to the minor moment of the slab generated in the column It is to provide a lattice shear reinforcement structure of flat plate slab and steel column joint.

Therefore, the present invention may include the following examples in order to achieve the above object.

Embodiment of the present invention is a slab that is joined to the steel column and the steel column to form a bottom plate and a load path provided to the junction between the steel column and the slab to transfer the shear force in the gravity direction due to the load of the slab to the steel column Shear reinforcement member to form a, the shear reinforcement member is a reinforcement is inserted into the slab is fastened to the front end of the shear support and the shear support is fixed to the grid structure around the steel pillar extending to cross a plurality of mutual cross The grid-like shear reinforcement structure of the concrete flat plate slab and the steel column joint may include a height determining portion in communication with either the portion and the reinforcement or the shear support to determine the temporary assembly and position of the reinforcement.

The present invention can be fastened by fitting the shear reinforcement structure forming the junction of the steel column and the slab is made completely after the assembly, the height adjustment according to the shape or design purpose of the structure to improve the workability Can be.

In addition, the present invention can secure the shear performance by strengthening the integrity of the joint between the steel column and reinforced concrete flat plate slab, and secured structural safety through the sub-moment resistance of the shear reinforcement structure to increase the utilization of the technology.

1 is a view showing a joint used in a conventional flat plate slab.
2 is a view for explaining the outline of the lattice-shaped shear reinforcement structure of the concrete flat plate slab and steel column joint according to the present invention.
Figure 3 is a plan view showing a lattice type shear reinforcement structure of the concrete flat plate slab and steel pillar joint according to the present invention.
4 is a plan view of the shear support.
5 is an exploded view of the shear reinforcing member.
6 is an elevation view of a shear reinforcement member.
7 is a view showing the assembly and the load path of the shear reinforcing member.
8 is a plan view illustrating a shear support of another embodiment.
9 is a plan view showing another embodiment.
10 is an exploded view of a shear reinforcement member in another embodiment.
11 is a plan view of a bending stress resisting plate.
12 is a view showing another embodiment of the present invention.
Figure 13 is a view showing the construction site of the lattice type shear reinforcement structure of the concrete flat plate slab and steel pillar joint according to the present invention.
14 is a flowchart showing the construction procedure of the present invention.
15 to 17 show still another embodiment of the present invention.

While the present invention may be modified in various ways and may have various embodiments, specific embodiments will be illustrated in the drawings and described in detail. It is not intended to be exhaustive or to limit the invention to the specific embodiments, and to any and all alterations, equivalents, and substitutes included in the spirit and scope of the present invention for connecting and / or fixing structures extending in different directions. It should be understood as applicable.

The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. As used herein, the terms "comprise" or "have" are intended to indicate that there is a feature, number, step, action, component, part, or combination thereof described on the specification, and one or more other features. It is to be understood that the present invention does not exclude the possibility or the possibility of addition of numbers, steps, operations, components, components, or combinations thereof.

In addition, in describing the present invention, when it is determined that the detailed description of the related known technology may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted.

Hereinafter, with reference to the accompanying drawings, a preferred embodiment of the lattice-shaped shear reinforcement structure of the concrete flat plate slab and steel pillar joint according to the present invention.

Figure 2 is a view for explaining the outline of the lattice type shear reinforcement structure of the concrete flat plate slab and steel column joint according to the present invention.

Referring to Figure 2, the present invention is characterized in that the shear reinforcement member 40 is configured around the steel pillars to prevent the tensile deformation of the steel pillars 10 by the tensile force due to the load of the slab (20). .

The shear reinforcement member 40 reinforces the shear so that deformation does not occur even when tension and compression due to the load P of the slab 20 are applied. A more detailed configuration will be described below.

 3 is a plan view showing a lattice type shear reinforcement structure of the concrete flat plate slab and the steel column joint according to the present invention, FIG. 4 is a plan view showing the shear support, Figure 5 is an exploded view of the shear reinforcement member, Figure 6 is a shear Elevation view of the reinforcing member, FIG. 7 is a view including the assembly and load path of the shear reinforcing member.

3 to 7, the present invention extends around the steel frame pillars 10 and the steel frame pillars 10 to form a bottom plate and the slab 20 to reduce the amount of concrete pouring and Hollow body 30 (refer to FIG. 13) for reducing noise between floors, shear reinforcing member 40 which provides a load path for reinforcing the shear of the joint between the slab 20 and the steel column 10, and the slab ( Tension bars 60, 61, 62 to prevent continuous collapse at the top and bottom of 20).

Steel column 10 is a column made of a metal material, as shown in Figure 4 (a), the steel column 10 filled with concrete 11 inside, and shown in Figure 4 (b) As shown, the concrete 11 may be divided into a steel pillar 10 that is not filled.

In addition, the steel column 10 may be any one of a square steel column, a circular steel pipe column, H-shaped steel column. In particular, the H-beam steel column is made of a square by welding the iron plate on the open both sides may be applied to the inside of the pillar filled with hollow or concrete (11).

Hereinafter, the description will be made by selectively applying the steel pillars 10 as described above, but the present invention is not limited to the shape and the concrete filling of the steel pillars (10). That is, the steel frame column 10 of the present invention is applicable to any column that can support the shear reinforcement member 40.

Tensile reinforcing bars 60 are fastened by fitting to the welding coupler 230 installed on the grid-shaped shear support portion 200 of the steel column 10 or the shear reinforcing member 40 to be described later, or in communication with the steel column (10) Can be extended. In addition, the tensile reinforcement 60 is to be omitted from the following detailed description according to the application of known techniques as a configuration that is essentially applied in the slab 20 structure.

The hollow bodies 30 (refer to FIG. 13) are made of a plastic resin forming an empty space therein, and are embedded in the slab 20, thereby reducing interlayer noise, decreasing the amount of concrete, and reducing the load of the slab 20. Has an effect. That is, the hollow body 30 is a means for maintaining the excellent cross-sectional performance while reducing the weight of the slab 20 is advantageous for the implementation of the advantages of the flat plate that can omit the beam and the interlayer noise reduction.

The shear reinforcing member 40 reinforces the joint portion between the steel column 10 and the slab 20 to transmit the shear force due to the load of the slab 20 to the steel column 10, and break the punching around the column. Form load paths to prevent (rear shear).

For this purpose, the shear reinforcement member 40 includes a shear support part 200 extending and fixed in a horizontal and vertical direction about the steel frame pillar 10, and a reinforcement part 100 fixedly fitted to the shear support part 200. , The height determining part 300 to determine the height of the reinforcement part 100 and pre-assemble with the shear support part 200, a fixing part (not shown) for fixing the reinforcement part 100 and the shear support part 200, and reinforcement Bending stress resistance plate 400 is fixed to both the part 100 and the shear support part 200 to resist the bending stress of the reinforcement part 100, and a plurality of studs are fastened to the reinforcement part 100 and laterally aligned. 500 may be included.

Shear support 200 is a plurality of shear support plate 210, the welding coupler 230, and the shear support plate deformation of the steel pillars in the cross support is extended to form a lattice to cross each other in close contact with each side of the steel column (10) It includes a strain relief 240 cut to prevent.

For example, a total of four shear support plates 210 are extended to be fixed and intersect with each side of the steel column 10 by welding or other means. For this purpose, the shear support part 200 may be formed in a lattice form by being connected to a pair of one-piece, and a pair of split and one-piece panels and another pair welded to the steel column 10 by cross.

3 to 5, the front support plate 210 is opened at either end or at either end thereof so that the downward mounting holes 212 and the downward mounting holes are installed so that the height determining unit 300 is installed. A downward guide 211 cut down from an upper end, a through hole 213 through which a fixing part (not shown) communicates, and an intermediate plate 214 in close contact with the steel column between both ends of the shear support plate. .

The downward guide 211 is cut downward from the upper end of the front support plate 210 to expose the upper surface of the downward mounting hole 212, the height determining unit 300 is installed. In addition, the downward guide 211 also serves to guide the height determining unit 300 to the downward installation hole 212 as it is cut inclined in the direction.

The downward installation tool 212 has a semi-opening shape, and the height determination part 300 is provided.

Here, the height determining unit 300 is lowered in a state in which the fastening bolt is fixed to the front end of the reinforcing part 100 in the transverse direction and fixed to the downward installation port 212, for example. That is, the height determining unit 300 determines the height of the reinforcing part 100, serves to temporarily assemble the reinforcing part 100 to the shear support plate 210, and the downward guide 211 is a height determining part ( The guide 300 is installed, the height determining unit 300 is installed in the downward installation port 212, and locked.

The plurality of through holes 213 may be aligned with the shear support plate 210 in the vertical direction, and a fixing part (not shown) may be inserted into the reinforcing part 100.

The intermediate plate 214 is an area that is adhered to the steel pillars by close contact and / or welded between both ends of the shear support plate.

Here, the intermediate plate 214 may be deformed by the compressive or tensile force applied on the steel column and / or slab after welding bonding. Therefore, in the present invention, a plurality of deformation preventing tools are formed in the intermediate plate 214.

The deformation preventing tool 240 is cut in plurality in the middle plate, and welded to the steel column at the cut end.

The reinforcement part 100 extends horizontally but a pair of extension plates 110 and 110 'spaced apart from each other, and punching reinforcement to form a load path on the upper and lower sides of the extension plates 110 and 110' to reinforce the punching shear force. Means 120 and extension plates 110, 110 ′ comprise a leveling plate 130 that protrudes from the tip and aligns vertically.

The pair of extension plates 110 and 110 ′ extend horizontally and have an extension head region 110a formed to have an area protruding downward from one side adjacent to the steel column 10 side, and an opposite side from the extension head region 110a. It includes an extended tail region (110b) that is shorter in length.

That is, the extension plates 110 and 110 ′ have longer lengths in the vertical direction as they are adjacent to the steel pillars 10, and shorter lengths as they are farther away. Such a shape increases the joint area with the shear support 200 fixed to the steel column 10 so as to transfer the shear force due to the load of the slab 20 to the steel column 10.

In addition, the pair of extension plates 110 and 110 ′ are assembled to be spaced apart from each other by the punching reinforcing means 120 so that the shear supporting plate 210 is lowered to be positioned therebetween, and then the height determining unit 300 is downwardly installed. While installed in the 212 to the shear support plate 210 maintains the assembled state.

To this end, the pair of extension plates 110 and 110 ′ includes a plurality of coupling holes 111 formed through the extension head region 110a and guide ends 112 extending downward from the bottom to the outside.

The plurality of coupling holes 111 are aligned in the vertical direction in the extension head region 110a. In this case, the coupling hole 111 is fastened to the fixed part (not shown) and the height determining part 300 in communication with the through hole 213 of the shear support plate 210.

Here, the fixing part (not shown) and the height determining part 300 may be applied to the fixing bolt.

The leveling plate 130 protrudes from the tip end portions of the extension plates 110 and 110 ′ to match the vertical state of the extension plates 110 and 110 ′. For example, the leveling plate 130 is set so that the end portion of the reinforcement part 100 is vertical while the tip is in close contact with the contact plate 220 in close contact with the steel column 10 between the shear support plate 210. give. The leveling plate 130 may further include a guide hole 131 through which the guide line 610 passes.

The punching reinforcement means 120 has a first punching reinforcement plate 121 bonded on the upper surface to connect the extension plates 110 and 110 ', and a second punching connected across the extension plates 110 and 110' from the lower side. The reinforcement plate 122 and a third punching reinforcement plate 123 connected to the extension plates 110 and 110 ′ on one side surface thereof.

The first punching reinforcement plate 121 is fixed to span the extension tail region 110b of the extension plates 110 and 110 'to interconnect and fix the extension plates 110 and 110'. Here, the first punching reinforcement plate 121 connects and fixes the extension plates 110 and 110 ', and at the same time, the shear force due to the load of the slab 20 is extended from the extension tail region 110b to the extension head region 110a. It serves to convey.

The second punching reinforcement plate 122 is adhesively fixed to span at the lower end of the extension head region 110a of the pair of extension plates 110, 110 ′. The second punching reinforcement plate 122 transmits the shear force transmitted through the first punching reinforcement plate 121 to the extension head region 110a.

The third punching reinforcement plate 123 transmits the tensile force transmitted through the extension head region 110a to the bending stress resistance plate 400. The third punching reinforcement plate 123 is fixed at the upper end to the extension head region 110a of the extension plates 110 and 110 ′.

The bending stress resistance plate 400 is an adhesive plate (or shear support plate) of the other shear support part 200 that intersects the upper surface of the third punching reinforcement plate 123 after the reinforcement part 100 and the shear support part 200 are fastened. (210 ') is coupled by welding.

The bending stress resisting plate 400 is an inclined panel made of iron, has a predetermined thickness, and one side closely contacted with the steel column 10 (or the other shear support part 200) forms a vertical end, and the opposite side forms an inclined surface. It is a vertical panel that consists of a plate of height and width.

As such, the bending stress resisting plate 400 is generated by the sub-moments of the column and the slab joints as they are respectively bonded to the steel column 10 (or other cross-support supporting portion 200) and the third punching reinforcing plate 123. To transfer the tensile force of the inner upper slab to the steel pillars 10 (or other leaflet paper portion 200 to be crossed).

A plurality of studs 500 may be installed on any one or both of the pair of extension plates 110 and 110 ′. Therefore, the extension plates 110 and 110 ′ are formed with a plurality of fastening holes (not shown in the drawing) to fasten the stud 500.

In this case, the stud 500 is fastened laterally so as to protrude outward from the extension tail region 110b of the extension plates 110 and 110 ′, so that the stud 500 may receive a gravity load applied to the slab 20. Can be extended

The present invention may further include other embodiments in which the shape of the shear support 200 is modified. This will be described with reference to FIGS. 8 to 11.

8 is a plan view showing a shear support of another embodiment, FIG. 9 is a plan view showing another embodiment, FIG. 10 is an exploded view of a shear reinforcing member in another embodiment, and FIG. 11 is a plan view showing a bending stress resisting plate. .

8 to 11, another embodiment of the present invention is a shear support 200 and the shear support is fixed to the outer surface of the steel pillars 10 filled with concrete or the steel pillars 10 not filled with concrete, The reinforcement part 100 which is fastened to the 200 and forms the load path of the shear force resulting from the load of the slab 20, the bending stress resistance plate 400 which reinforces the bending stress of the reinforcement part 100, and reinforcement The unit 100 includes a height determination unit 300 for temporarily assembling and determining the height of the shear support 200.

The double shear support part 200 is a plurality of shear fixing plate 220 bonded to the outer surface of the steel column 10, the second shear support plate 210 'fixed to protrude forward from the fixing plate, and prevents deformation of the shear fixing plate And a deformation preventing opening 240 that is opened to make it easy.

The shear fixing plate 220 is formed of, for example, a plate that is welded to each side of the rectangular steel frame column 10 by welding, and a welding coupler 230 to which the reinforcing bars 60 are coupled or connected at an outer surface thereof. do. In addition, the shear fixing plate 220 has a plurality of deformation preventing openings 240 formed therein. The deformation preventing opening 240 is opened in the fixing plate and is bonded to the steel column by welding to the cut section.

That is, the shear fixing plate 220 is formed with a plurality of deformation prevention tool, it is fixed to the outer surface of the steel frame pillar 10 by welding as a plurality of plate material.

The second shear support plate 210 ′ is an upright plate and is fixed to protrude outward from the fixed plate. Here, the second shear support plate 210 ′ may include the same configuration as the shear support plate 210 of the above-described embodiment.

That is, the second front support plate 210 ′ has an upper side opening downwardly in the opening 212 and the downward guide (212) in which the height determination unit 300 is installed, the downward guide (212) to expose the downward guide ( 211 and a through hole 213 in which a fixed portion (not shown) communicates.

The downward guide 211 is cut downward from the upper end of the second shear support plate 210 ′ to expose the top surface of the downward mounting hole 212 in which the height determining unit 300 is installed. In addition, the downward guide 211 also serves to guide the height determining unit 300 to the downward installation hole 212 as it is cut inclined in the direction. The downward installation tool 212 has a semi-opening shape, and the height determination part 300 is provided.

The reinforcement part 100 has the same configuration as the above-described embodiment, and the pair of extension plates 110 and 110 ′ are spaced apart from each other to be assembled by the punching reinforcement means 120, and the stud 500 includes the extension plates 110,. 110 ') so as to be laterally aligned. In addition, the pair of extension plates 110 and 110 ′ include a guide end 112 extending to be inclined outwardly from the bottom and a leveling plate 130 having guide holes formed at the end thereof.

The guide end 112 serves to guide the upper end of the second shear support plate 210 'to be inserted therebetween as the guide end 112 is inclined downward.

The height determining part 300 is formed along the downward guide 211 when the reinforcing part 100 descends in a state in which the height determining part 300 is horizontally fastened through the coupling hole 111 formed in the head region of the reinforcing part 100. It is installed as a downward installation port 212 of the two-stage support plate 210 'to prevent the reinforcement portion 100 from falling.

As described above, the coupling hole 111 of the reinforcement part 100 whose lowering is prevented by the height determining part 300 is placed at the same position as the through hole 213 formed in the second shear support plate 210 '. Therefore, the fixing part (not shown) communicates with the assembly hole and the through hole 213, so that the reinforcement part 100 and the shear support part 200 are coupled to each other.

The bending stress resisting plate 400 is the outer surface of the shear fixing plate 220 or the steel pillars 10 and the third punching reinforcing plate 123 after the reinforcing part 100 and the shear supporting part 200 are fastened as described above. It is fixed over the top by welding or other tools or devices.

Here, unlike the configuration described above, the bending stress resistance plate 400 has a trapezoidal shape having a width extending laterally in one region 410 extending toward the steel column 10 as shown in FIG. 11, and an extension plate ( Opposite regions 420 extending to the sides 110, 110 ′ extend into a rectangle having a narrower width than one region 410.

As such, the bending stress resisting plate 400 is bonded to the steel column 10 (or the shear fixing plate 220) and the third punching reinforcing plate 123, and thus the inner side of the slab generated by the parent moment of the column and the slab joint. Transfer the tensile force of the upper portion to the steel column (10).

In addition, in the present invention, an elastic member 700 such as a spring or an iron wire may be added to the stud 500. This will be described with reference to FIG. 12.

12 is a view showing another embodiment of the present invention.

Referring to FIG. 12, another embodiment of the present invention further supports an elastic member 700 so as to reinforce a load path that can be transmitted to the steel column 10 by supporting the shear force and the moment by the elastic force with elastic force. Include.

The elastic member 700 is extended to a shape surrounding the outer surfaces of the extension plates 110 and 110 'as iron wires or springs, and then embedded in the slab 20 by poured concrete.

Here, the start and end of the steel wire or spring may be fixed by welding to any one of the outer surface of the steel pillar 10, the shear fixing plate 220, the shear supporting plate 210, the extension plate (110, 110 '). Alternatively, the wire and the spring may be arranged to surround the extension plates 110 and 110 'in an unfixed state.

Such an elastic member 700 can reinforce the strength of the extension plate (110, 110 '), and can strengthen the integrity to support more the shear force in the gravity direction due to the load of the slab 20. . In addition, the elastic member 700 may be installed separately from the stud 500 or at the same time.

The present invention includes the configuration as described above, the following describes a construction method according to any one of the embodiments described above.

13 is a view showing the construction site of the lattice type shear reinforcement structure of the concrete flat plate slab and the steel column joint according to the present invention, Figure 14 is a flow chart showing the construction sequence.

Referring to Figure 13 and 14, the construction process according to the present invention is to install the steel frame column 10 S100 step, the step S200 to install the floor slab formwork 70, and install the temporary steel column 50 S300 step, S400 step of assembling the shear reinforcement member 40, S500 step of assembling the bending stress resisting plate 400 to the upper surface and the steel column 10 of the extension plate (110, 110 '), and tensile reinforcement S600 step of installing 60, and S700 step of constructing the slab 20 by installing the hollow body 30 and placing concrete.

Steel column pillars 10 in step S100 is manufactured in the factory and transported to the site. Here, the shear support 200 may be manufactured and transported integrally with the steel column 10 in a factory, or assembled by welding in the field.

The floor slab formwork 70 in step S200 forms a space in which the working space and hollow bodies 30 of workers are installed.

The floor slab formwork 70 in step S300 is supported by the temporary steel column 50 to withstand the load of workers or other materials after the steel column 10 is installed.

In step S400, the worker connects the guide line 610 to the reinforcement part 100 after the temporary steel frame 50 is installed, and draws both ends with the guide hook 620 fixed or installed on the steel frame 10. . And the operator lowers the reinforcement part 100 by adjusting both ends of the guide line 610.

In this case, the pair of extension plates 110 and 110 ′ are assembled to be spaced apart from each other by the first punching reinforcing plate 121, the third punching reinforcing plate 123, and the second punching reinforcing plate 122 at upper and lower portions thereof. After descending in accordance with the induction of the guide line 610, the height determination unit 300 is lowered until it is caught or placed in the upward installation hole 212 exposed by the upward incision 211.

The operator communicates the fixing part (not shown) to the coupling hole 113 of the extension plates 110 and 110 ′ and the through hole 213 of the shear support plate 210 so that the shear support part 200 and the reinforcement part 100 are provided. Fix each other.

In step S500, the worker welds the bending stress resisting plate 400 over the steel frame column 10 and the third punch reinforcing plate 123. Therefore, the extension plates 110 and 110 'have a resistance force that can be prevented from bending.

In step S600, the worker installs the reinforcing bars 60 to be connected to the welding coupler 230.

Workers in step S700 aligns the hollow bodies 30 on the top surface of the bottom slab formwork 70, constructs the slab 20 to form the bottom plate between the steel pillars 10 by pouring concrete.

The shear reinforcement structure constructed as described above receives the shear force due to the load of the slab 20 from the first punching reinforcement plate 121 located in the extension tail region 110b of the extension plates 110 and 110 '. Transfer to the reinforcement plate 122, the second punching reinforcement plate 122 through the third punching reinforcement plate 123 and the bending stress resistance plate 400 through the load path to which the tensile force is transmitted to the steel column (10) Form.

That is, the present invention can prevent the deformation of the steel column 10 by absorbing the tensile force and the compressive force generated in the steel column 10 of the conventional type as the extension plate (110, 110 ').

In addition, the present invention due to the coupling structure between the bending stress resisting plate 400 and the extension plate 110, 110 'and the shear support plate 210 in close contact with the steel column 10, the steel column 10 and the slab 20 The integrity of the joints between the two joints is strengthened to ensure shear performance, and structural safety is secured through the sub-moment resistance of the shear reinforcement structure.

In addition, the present invention includes a shear reinforcement member 40 made of a unitary structure, not a coupling structure between the reinforcement portion 100 and the shear support portion 200 of the above-described embodiments. This will be described with reference to FIGS. 15 to 17. However, in the following embodiments, the same configuration as the above-described embodiment (for example, the hollow body 30, the stud 500, the elastic member 700, the welding coupler 230, the tensile rebar 60, and the slab ( 20)) are omitted.

15 is a plan view of the integral shear reinforcement member 40.

Referring to FIG. 15, another embodiment of the present invention is an extension plate 140 extending in a lattice shape around the steel column 10, and punching reinforcement means fixed to upper and lower surfaces of the extension plate 140, respectively. 120.

Extension plate 140 is an upright plate that is fixed by welding to the outer surface of the steel column 10 is extended so that a plurality of cross each other around the steel column (10).

Punch reinforcement means 120 is fixed on the upper and lower surfaces for each extension plate 140 to form a path for transmitting the shear force. That is, the first punching reinforcement plate 121 is the upper end of the extension plate 140, the second punching reinforcement plate 122 is coupled to the lower end of the extension plate 140 by welding to form a load path for transmitting the shear force.

16 is a view showing an embodiment using a bent extension plate, Figure 17 is a cross-sectional view showing a bent extension plate.

Referring to FIGS. 16 and 17, the bent extension plate 150 extends so that a plurality of welded adhesives are bonded to the outer surface of the steel column 10 by crossing each other. The bent extension plate 150 is composed of a horizontal surface 151, the upper surface and the lower surface extends horizontally, and an upright surface 152 downward from one side of the horizontal surface (151).

The horizontal plane 151 forming the upper and lower surfaces spaced apart from each other has a width capable of receiving the shear force applied from the slab 20.

The upstanding surface 152 interconnects the horizontal surfaces 151 spaced apart from each other, and forms a load path and a provision surface of the steel pillar 10 and the other bent extension plate 150.

That is, the bent extension plate 150 may be manufactured in a 'c' shape.

The extension plate 140 and the bent extension plate 150 are embedded in the slab 20 while being fixed by welding to the outer surface of the steel column 10. In this case, the stud 500 and / or the elastic member 700 may be additionally installed on the extension plate 140 and / or the bent extension plate 150, and the hollow body 30 may be embedded in the slab 20. Can be.

Embodiments of the present invention described above are merely exemplary, and those skilled in the art will appreciate that various modifications and equivalent other embodiments are possible therefrom.

10: steel column 20: slab
30: hollow body 40: shear reinforcement member
50: temporary steel pillars 60: tensile steel
70: floor slab formwork 100: reinforcement
110, 110 ', 140: extension plate 110a: extension head area
110b: extended tail region 111: coupling hole
112: guide 120: punching reinforcement means
121: first punching reinforcement plate 122: second punching reinforcement plate
123: third punching reinforcement plate 130: leveling plate
131: guide ball
150: bent extension plate 151: horizontal plane
152: upright surface 200: shear support
210, 210 ': shear support plate 211: upward incision
212: upward installation port 213: through hole
220: shear fixing plate 230: welding coupler
240: strain relief 300: height determining unit
400: bending stress resistance plate 500: stud
610: guide line 620: guide hanger
700: elastic member

Claims (10)

Steel column (10);
A slab 20 joined to the steel column 10 to form a bottom plate; And
A shear reinforcing member 40 provided at a joint portion between the steel column 10 and the slab 20 to form a load path for transferring the shear force in the gravity direction due to the load of the slab 20 to the steel column 10; Including,
Shear reinforcement member 40
A plurality of shear support parts 200 extending to cross each other and fixed in a lattice shape around the steel column 10;
Reinforcement portion 100 is fastened to the front end of the shear support portion 200 is embedded in the slab (20);
A height determining part 300 communicating with the reinforcing part 100 and locking the reinforcing part 100 fitted to the shear support part 200 to determine temporary assembly and position; And
It includes; a fixing portion (not shown) for fixing the reinforcement portion 100 and the shear support portion 200 is assembled by the height determining unit 300 in communication;
Reinforcement part 100
A plurality of extension plates (110, 110 ′), each of which is a stand-up plate that is fastened to the shear support part 200 by a fitting method, is horizontally spaced apart from each other to reinforce the front end of the joint of the slab 20 and the steel column 10. ); And
The plurality of extension plates 110 and 110 ', which are spaced apart from each other as a plurality of fixed plates at the upper and lower sides of the extension plates 110 and 110', are fixed, and the shear force due to the slab 20 load is transmitted to the steel column 10. Punch reinforcement means 120 for forming a load path to the;
delete The method of claim 1, wherein the punching reinforcement means 120
A first punching reinforcement plate 121 fixed to an upper surface of the extension plates 110 and 110 'to form a load path for transmitting shear force due to the load of the slab 20;
A second punching reinforcing plate 122 fixed at the bottom of the extension plates 110 and 110 '; And
A concrete flat plate comprising: a third punching reinforcing plate 123 fixed to the upper surfaces of the extension plates 110 and 110 'to transmit the shear force transmitted through the second punching reinforcing plate 122 to the steel column 10. Lattice shear reinforcement structure of slab and steel column connection.
The method of claim 1, wherein the extension plate 110, 110 '
An extension head region 110a extending downward to be drawn into the front end support 200 and penetrating through the extension head region 110a and having a plurality of coupling holes 113 communicating with a fixed portion (not shown); A lattice type shear reinforcement structure of a concrete flat plate slab and steel column joint, characterized in that it is formed of an extended tail region (110b) having a shorter height than the extension head region (110a) and extending to the opposite side.
The method according to claim 1,
The lattice shear reinforcement structure of the concrete flat plate slab and steel column joint further comprising; a flexural stress resistance plate 400 fixed to the upper surface of the reinforcement part 100 to reinforce the bending stress of the reinforcement part 100.
The method of claim 3, wherein the shear support 200
A downward installation hole opened from an upper side so that the height determination unit 300 is installed at a tip that is inserted between the extension plates 110 and 110 ′; And
The grid-like shear reinforcement structure of the concrete flat plate slab and the steel column joint comprising a;
The method according to claim 1, the reinforcement part 100
The grid-like shear reinforcement structure of the concrete flat plate slab and the steel column pillar junction, characterized in that the steel wire or spring is installed to wrap on the outer surface is embedded in the slab (20).
The method according to claim 3, the reinforcement part 100
The grid-like shear reinforcement structure of the concrete flat plate slab and steel column joint further comprises a plurality of studs (500) fixed to the extension plate (110, 110 ').

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