KR101986611B1 - Integrated structure of reinforced concrete column and steel beam - Google Patents

Abstract

The present invention relates to a composite structure of a reinforced concrete column and a steel beam having high strength, including: a T-shaped concrete column having a protrusion part integrally extended on both side surfaces of an upper portion; a prefabricated connection unit coupled to the protrusion part and having a support plate facing an end portion of the protrusion part, one or more spring member coupled to one surface of the support plate and embedded in the protrusion part and a coupling part vertically extended from the other surface of the support plate; and an H-shaped steel beam in which an end portion is fastened to the coupling part and which is provided between side surfaces of the protrusion parts of the reinforced concrete columns adjacent to each other.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a composite structure of a reinforced concrete column having a high strength and a steel beam,

The present invention relates to a composite structure of a reinforced concrete column and a steel beam having high strength and high strength, and more particularly, to a composite structure of a reinforced concrete column and a steel beam which are easy to construct and maintain by using a new structure, . ≪ / RTI >

Buildings built prior to 1988 when seismic design was introduced, or existing low - rise buildings without seismic design provisions, require seismic strengthening. Especially, as the frequency and progress of earthquakes in recent years have increased, it is urgent to strengthen the earthquake resistance of public buildings used by many people such as school buildings.

Also, as the number of recent seismic events increases, seismic retrofitting of buildings where seismic design is not applied in order to reduce disasters caused by earthquakes is required.

Especially, in case of remodeling an existing building without seismic design, it is important to strengthen the seismic strengthening of weak beam - column connection.

When remodeling a conventional RC building, a method of reinforcing the structure from outside the building is often used.

However, this method is not economical because it needs to remove the finishing material of the seismic strengthening part, and when the partially removed finishing material is replaced, there arises a problem of usability due to occurrence of different color from other parts.

For example, in Japanese Patent Application Laid-Open Nos. 10-2005-113911 and 10-1551354, the slab and the bottom finishing material of the beam top must be removed to reinforce the beam-column joint, resulting in poor workability and economical efficiency.

In addition, in Japanese Patent No. 10-652894, the beam-column joint is reinforced by joining the H-beam and the hull to the beam lower part. Such a general hatch reinforcement technique resists the load by the compression force of the hatch in such a manner that the hatch supports the lower part of the horizontal member. However, in order to cope with bi - directional lateral loads such as seismic loads, it is necessary to install the hooks on the top and bottom of beam - column joints respectively.

On the other hand, in this case, there is a problem that the space utilization is lowered because the hitting protrudes to the upper part of the slab.

An object of the present invention is to provide a composite structure of a reinforced concrete column and a steel beam which can firmly fix a reinforced concrete column and a steel beam, and uniformly inject an external impact to improve durability.

Another object of the present invention is to provide a composite structure of a reinforced concrete column and a steel beam which can firmly and easily join the reinforced concrete column and the steel beam, which are different members.

It is another object of the present invention to provide a reinforced concrete column capable of reducing the bending moment acting on a steel beam installed between reinforced concrete columns, To provide a composite structure of a steel beam.

According to an aspect of the invention, embodiments of the present invention include a T-shaped concrete column having protrusions integrally extending from both upper sides thereof; A support plate coupled to the protrusion and facing the distal end of the protrusion; at least one spring member coupled to one surface of the support plate and embedded in the protrusion; and a coupling unit vertically extending from the other surface of the support plate, A connecting unit; And an H-shaped steel beam fastened to the joint portion and disposed between the side surfaces of the projecting portions of the neighboring reinforced concrete columns, wherein the support plate has a support portion provided at the center portion, A first fastening plate having a circular concave portion provided on an inner circumference thereof so as to be threadedly engaged with the spring member, a second fastening plate having a vertical concave portion at a central portion for slidingly engaging the engaging portion, And a lower fixing part provided on a surface of the body to support the bottom surface of the projection, wherein the spring member has a spring-shaped body part having an end to be engaged with the first fastening plate, Wherein the support portion and the lower fixing portion are made of stainless steel Wherein the first and second fastening plates are made of polyacetal resin (POM), and the lower fixing part is formed integrally with the support part so as to extend from the support part in an L-shape, The lower fixing part includes at least one lower bolt hole into which a bolt is inserted, and a lower bonding hole around the lower bolt hole, the lower bonding hole being smaller than the lower bolt hole and having an adhesive introduced thereinto. And a pair of sliding groove portions provided at positions corresponding to one surface and the other surface of the coupling portion so as to be recessed in the longitudinal direction of the coupling portion so as to be slidably inserted into the coupling portion, And a space corresponding to a distal end of the engaging part is inserted to insert a distal end of the part, Is provided with a pair of flanges comprises a composite structure of reinforced concrete beams and steel beams are fixed is inserted into the sliding groove.

Wherein the flange is provided with a plurality of flange adhesive holes passing through the flange and an adhesive is provided in the space of the second fastening plate so that when the coupling part is slid and inserted into the space of the second fastening plate, So that the joint portion and the second fastening plate can be fixed.

A through hole is formed in the coupling portion, a through hole is formed in the web of the steel beam, and a fastening member is inserted into the through hole of the coupling portion and the through hole of the steel beam so that the assembled connecting unit and the steel beam are fastened .

And a plurality of coupling passages provided in a longitudinal direction of the coupling portion and having a semicircular cross section perpendicular to the longitudinal direction, the adhesive force being introduced through the coupling passage, And the joining portion and the steel beam can be combined.

Wherein the engaging portion and the second fastening plate are vertically connected to each other and at least one stiffener for fixing the engaging portion and the support plate is provided between the engaging portion and the support plate, and the stiffener is made of polypropylene, polyimide and polyethylene And terfyl phthalate.

The waterproof coating portion is provided on the outer surface of the coupling portion and the second fastening plate. The waterproof coating portion is a UV curable polymer. The UV curable polymer may include a UV curable urethane resin or a UV curable epoxy resin have.

Wherein the waterproof coating portion is formed by irradiating UV curable polymer with UV to cure the UV curable urethane resin is urethane acrylate and the UV curable epoxy resin is epoxy acrylate.

As described above, according to the present invention, it is possible to provide a composite structure of a reinforced concrete column and a steel beam, wherein the reinforced concrete column and the steel beam can be firmly fixed and the outer impact is uniformly injected to improve durability.

In addition, according to the present invention, it is possible to provide a composite structure of a reinforced concrete column and a steel beam which can firmly and easily join the reinforcing concrete column and the steel beam, which are different members.

Further, according to the present invention, since the bending moment acting on the steel beam installed between the reinforced concrete columns is reduced, it is possible to reduce the amount of the steel beam by using the steel beam with a small cross- A composite structure can be provided.

1 is a front sectional view of a composite structure of a reinforced concrete column and a steel beam according to an embodiment of the present invention.
2 is a perspective view of the assembled connecting unit shown in Fig.
FIG. 3 is an exploded perspective view of FIG. 2. FIG.
Fig. 4 is a view showing an upper surface of the engaging portion engaged with the second engaging plate. Fig.
5 is a perspective view of the second fastening plate and the engaging portion;
6 is a perspective view of a coupling plate according to another embodiment of the present invention.
Fig. 7 is a rear view of the coupling plate of Fig. 6; Fig.
8 is a perspective view of the assembled connecting unit according to another embodiment of the present invention.
9 is a view showing the upper surface of Fig.

The details of other embodiments are included in the detailed description and drawings.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and the manner of achieving them will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. However, the present invention is not limited to the embodiments described below, but may be embodied in various forms. In the following description, it is assumed that a part is connected to another part, But also includes a case in which other media are connected to each other in the middle. In the drawings, parts not relating to the present invention are omitted for clarity of description, and like parts are denoted by the same reference numerals throughout the specification.

Hereinafter, the present invention will be described with reference to the accompanying drawings.

1 is a front sectional view of a composite structure of a reinforced concrete column and a steel beam according to an embodiment of the present invention. 2 is a perspective view of the assembled connecting unit shown in Fig. FIG. 3 is an exploded perspective view of FIG. 2. FIG. Fig. 4 is a view showing an upper surface of the engaging portion engaged with the second engaging plate. Fig. 5 is a perspective view of the second fastening plate and the engaging portion;

A composite structure 10 of a reinforced concrete column and a steel beam according to an embodiment of the present invention includes a T-shaped concrete column 100 having a protrusion 111 integrally extending from both sides of an upper portion thereof; A support plate 210 coupled to the protrusion 111 and facing the distal end of the protrusion 111, one or more spring members 220 coupled to one surface of the support plate 210 and embedded in the protrusion, And a coupling unit (230) extending vertically from the other surface of the support plate (210). And an H-shaped steel beam 300 fastened to the coupling part 230 and disposed between the side surfaces of the projecting parts 111 of adjacent reinforcing concrete columns.

Generally, when a composite structure of a reinforced concrete column and a steel beam is installed, a cross-shaped steel beam is installed on a rectangular prismatic reinforced concrete column, a main pole of the column is arranged at four corners of the upper surface of the reinforced concrete column, Was used to form a hole in the web of steel beam and to constrain the main body of the column. In this method, the precise hole position is set in the web of the steel beam, the hole is pierced, and the shear reinforcement of the column is inserted into the hole. The work is difficult and complicated to carry out on the construction site. In addition, there is a problem in that it is difficult to provide a uniform shape due to the influence of the technique of the installer.

On the other hand, the composite structure 10 of the reinforced concrete column and the steel beam according to the embodiment of the present invention can easily connect the reinforced concrete column and the steel beam using the assembled connecting unit 200, There is an advantage that the related process can be omitted and it can be installed more easily.

The composite structure 10 of the reinforced concrete column and the steel beam according to the present invention does not include the reinforced concrete column 100 in the form of a cube but includes a column portion 110 and an elongated portion The reinforced concrete column 100 is provided with a protrusion 111 formed in a T shape and the reinforced concrete column 100 is provided with the assembled connection unit 200 at the end of the protrusion, Can be minimized, and the reinforced concrete column 100 made of a material different from that of the steel beam 300 can be firmly and easily connected to each other.

In addition, since the bending moment acting on the steel beam 300 installed between the reinforced concrete columns 100 is reduced due to the reduction in span caused by the protrusion 111 of the reinforced concrete column 100, The number of use of the steel beam 300 can be reduced by using the steel beam 300, and the installation cost can be reduced. Also, since the reinforced concrete column 100, which is a vertical member, can be used for high-strength concrete and the slab 400, which is a horizontal member, can be separated and installed using low-strength concrete, the workability is easy and the construction cost can be reduced .

The composite structure 10 between the reinforced concrete column and the steel beam according to the present embodiment includes a reinforced concrete column 100, a steel beam 200, a prefabricated connection 200 connecting the reinforced concrete column 100 and the steel beam 200, A unit 200, and a slab 400.

The reinforced concrete column 100 uses reinforcing bars to reinforce tensile strength due to the nature of concrete, which is strong against compressive force but weak in tensile strength. The reinforced concrete column 100 acts on the external force integrally with reinforcing bars and concrete. The reinforced concrete column 100 is the same as a reinforced concrete column used in a general construction site, and it is possible to install it in the field or to use pre-manufactured precast in the factory. Inside the reinforced concrete column 100, a plurality of vertical main beams in the vertical direction and a shear reinforcing bars horizontally surrounding the vertical main beam are repeatedly installed at regular intervals.

In this embodiment, since the upper steel beam 300 is not disposed through the inside of the reinforced concrete column 100, interference between the vertical main beam and the steel beam 300 does not occur. Therefore, it is also possible to uniformly distribute the vertical main beam over the entire surface without concentrating on the four corners of the reinforced concrete column 100 as in the prior art.

The reinforcing concrete column 100 may be integrally formed with the vertical portion of the reinforced concrete column 100 and may have a protrusion 111 extending from both sides of the upper portion of the column portion 110 of the reinforced concrete column 100. Depending on the position where the reinforced concrete column 100 is disposed in the building, the projecting portion 111 may be formed to extend from four opposite side surfaces, extend from two side surfaces at an angle of 90 degrees, And may be formed extending as shown in Fig. Inside the protrusion 111, a plurality of horizontal main bars in the horizontal direction and shear bars surrounding the horizontal main bar vertically may be repeatedly installed at regular intervals.

The assembled connecting unit 200 may be coupled to an end of the protrusion 111 to connect the reinforced concrete column 100 to the steel beam 300. The prefabricated connection unit 200 may be installed in advance on the end of the protrusion 111 of the reinforced concrete column 100 and then at least a part of the prefabricated connection unit 200 may be embedded therein when the concrete is laid.

The assembled connection unit 200 includes a support plate 210 having one surface facing the end surface of the protrusion 111 and a spring member 210 provided on one surface of the support plate 210 and embedded in the protrusion 111, A coupling part 230 provided on the other surface of the support plate 210 to be coupled to the steel beam 300 and a connection part 230 extending from the support plate 210 to connect the lower surface of the protrusion 111 And a lower fixing part 240 provided to support at least a part thereof.

The supporting plate 210 may be formed of a plurality of laminated layers and includes a supporting portion 211 provided at a central portion and a supporting portion 211 provided at one side of the supporting portion 211 to be screwed with the spring member 220 A second fastening plate 212 having a circular concave portion 212a having a threaded portion and a second fastening plate 213 having a vertical concave portion 213a at a central portion for sliding the coupling portion 230 And a lower fixing part 240 provided on a lower surface of the supporting part 211 to support a bottom surface of the protruding part 111.

The spring member 220 is embedded in the protrusion 111 and may be provided to be parallel to the protrusion 111 to support the inside of the protrusion 111. The spring member 220 includes a spring-shaped body portion 221 having an end coupled with the first fastening plate 212 and a spring-shaped body portion 221 provided at a distal end of the body portion 221, And a head part 222 provided in a cross-sectional area. The spring-shaped body 221 can increase the contact area with the protrusion 111 to more easily reinforce the strength of the protrusion 111, and the head 222 can be easily inserted into the body 221 And may be provided to support a shearing force in a direction perpendicular to the longitudinal direction of the body portion 221.

The support portion 211 and the lower fixing portion 240 may be made of stainless steel and the first and second fastening plates 212 and 213 may be made of polyacetal resin (POM). The support part 211 can maintain the strength of the support plate 210. The first and second fastening plates 212 and 213 are made of polyacetal resin which is a type of engineering plastic having high strength The shape can be easily controlled so that the spring member 220 and the engaging part 230 can be easily fastened.

The lower fixing part 240 may extend from the support part 211 in an L-shape. Preferably, the lower fixing part 240 is formed integrally with the supporting part 211 and then bent. The lower fixing part 240 includes at least one lower bolt hole 241 into which the bolt 1 is inserted and a lower bolt hole 241 surrounding the lower bolt hole 241. The lower bolt hole 241 is smaller in size than the lower bolt hole 241, A lower adhesive hole 242 may be provided.

The bolt 1 can firmly fix the lower fixing part 240 to the protrusion 111 through the lower bolt hole 241 and can prevent cracks or the like generated during the insertion of the bolt 1. [ Can be prevented by introducing the adhesive for concrete through the lower contact hole 242. [

The coupling part 230 is provided at a position corresponding to one surface and the other surface of the coupling part 230 so as to be recessed in the longitudinal direction of the coupling part 230 so as to be slidably inserted into the vertical concave part 213a. And a pair of sliding groove portions 232 which are formed on the inner circumferential surface.

The vertical concave portion 213a of the second fastening plate 213 has a space 213a corresponding to the distal end 231 in the coupling portion 230 so as to insert the distal end 231 of the coupling portion 230, And a pair of flanges 213b may be provided at the opening of the space 213a so as to be inserted into the sliding groove portion 232 and fixed.

The flange 213b may be provided with a plurality of flange bonding holes 213c passing through the flange 213b. An adhesive may be provided in advance in the space 213a of the second fastening plate 213, When the engaging portion 230 is slid and inserted into the space 213a of the second fastening plate 213, the adhesive in the space 213a flows out through the flange adhesive hole 213c, The second fastening plate 213 can be more firmly fixed.

The coupling part 230 is exposed to the outside of the protrusion 111 and may be fastened to the steel beam 300. A through hole 233 is formed in the coupling part 230 and a through hole is formed in the web of the steel beam 300. The through hole 233 of the coupling part 230 and the through hole 233 of the steel beam 300 By inserting a fastening member, such as a bolt or a stud, into the through hole, the assembled connecting unit 200 and the steel beam 300 can be fastened.

Both ends of the steel beam 300 are fastened to the coupling part 230 and disposed between the projecting parts 111 of the neighboring reinforced concrete pillars 100. The steel beam 300 connects the neighboring reinforced concrete columns 100 according to the installation position of the reinforced concrete column 100 in the shape of a +, -, or a letter, and generally uses an H-shaped steel. Generally, the upper and lower portions of the steel beam 300 are defined as flanges, and the portion connecting the upper and lower flanges is defined as a wale. As with the reinforced concrete column 100, the steel beam 300 can be manufactured through welding or the like in a form necessary at the work site, and can be manufactured in a factory in advance in a necessary form at the work site.

The slab 400 is poured as concrete on the reinforced concrete column 100 and the steel beam 300, and mainly forms the bottom surface of the building. In this embodiment, the concrete placed in the slab 400 may have a strength lower than that of the concrete placed in the reinforced concrete column 100.

The outer surface of the coupling part 230 and the second coupling plate 213 may be provided with a waterproof coating part. The waterproof coating part may include a UV curable urethane resin or a UV curable epoxy resin which is cured by UV irradiation and has insulation property as a UV curable polymer. Preferably, the waterproof coating part is formed by irradiating UV curable polymer with UV to cure, the UV curable urethane resin is urethane acrylate, and the UV curable epoxy resin is epoxy acrylate.

For example, the waterproof coating part is formed by curing UV curable polymer by UV irradiation, and the UV curable urethane resin may be urethane acrylate, and the UV curable epoxy resin may be epoxy acrylate. Since the waterproof coating portion is provided, a portion where the coupling portion 230 and the second coupling plate 213 are coupled to each other can be protected by water to be more rigid.

Hereinafter, another embodiment of the present invention will be described with reference to Figs. 5 to 9. Fig. Except for the contents to be described later, the contents similar to those described in the embodiments described with reference to Figs. 1 to 4 will not be described in detail.

FIG. 6 is a perspective view of an engaging plate according to another embodiment of the present invention, and FIG. 7 is a rear view of the engaging plate of FIG.

Referring to FIGS. 6 and 7, the assembled connecting unit according to the present embodiment is provided in a longitudinal direction of the engaging part 230a on the surface of the engaging part 230a that contacts the steel beam, And a plurality of coupling passages 234 each having a semicircular cross section. Since the adhesive can be introduced through the coupling channel 234 provided in the coupling part 230a when the coupling part 230a of the coupling part 230a is coupled with the steel beam, And the steel beam can be more firmly fixed.

FIG. 8 is a perspective view of the assembled connecting unit according to another embodiment of the present invention, and FIG. 9 is a top view of FIG.

8 and 9, the assembled connecting unit 500 according to the present embodiment includes a support plate 210 facing a end surface of a protrusion of a reinforced concrete column, A spring member 220 embedded in the protrusion, and a coupling part 230 provided on the other surface of the support plate 210 and coupled to the steel beam.

The coupling portion 230 and the support plate 210 are vertically connected to each other and the coupling portion 230 and the support plate 210 are fixed between the coupling portion 230 and the support plate 210 And the stiffener 510 may be formed of any one of polypropylene, polyimide, and polyethylene terephthalate.

The stiffener 510 may be provided on the other surface of the coupling part 230 that is not in contact with the steel frame and may be connected to the support plate 210. The stiffener 510 may be attached to the coupling part 230 By dispersing the impact, the coupling between the coupling part 230 and the steel beam can be made more rigid.

It will be understood by those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. The scope of the present invention is defined by the appended claims rather than the foregoing detailed description, and all changes or modifications derived from the meaning and scope of the claims and the equivalents thereof are included in the scope of the present invention Should be interpreted.

10: Composite structure of reinforced concrete column and steel beam
100: Concrete column
110:
111: protrusion
200: Assembled connection unit
210: Support plate
220: spring member
230:
300: steel beam

Claims (7)

A T-shaped concrete column having protrusions integrally extending from both upper surfaces thereof;
A support plate coupled to the protrusion and facing the distal end of the protrusion; at least one spring member coupled to one surface of the support plate and embedded in the protrusion; and a coupling unit vertically extending from the other surface of the support plate, A connecting unit; And
And an H-shaped steel beam fastener having an end fixed to the coupling portion and disposed between the side surfaces of the projecting portions of the adjacent reinforcing concrete columns,
The support plate includes a support portion provided at a central portion thereof, a first fastening plate provided on one surface of the support portion and having a circular concave portion having a thread on the inner circumference so as to be screwed with the spring member, A second fastening plate having a vertical concave portion in the central portion thereof, and a lower fixing portion provided on a lower surface of the support portion to support a bottom surface of the protruding portion,
Wherein the spring member comprises a spring-shaped body portion having an end coupled to the first fastening plate, and a head portion provided at a distal end of the body portion and having a wider cross-sectional area than the body portion,
The supporting part and the lower fixing part are made of stainless steel, and the first and second fastening plates are made of polyacetal resin (POM)
The lower fixing part is formed integrally with the supporting part so as to be bent and extended from the supporting part in an L-shape. The lower fixing part is formed with one or more lower bolt holes into which bolts are inserted, A lower adhesive hole is provided which is smaller in size than the bolt hole and into which the adhesive flows,
The coupling portion includes a pair of sliding groove portions provided at positions corresponding to one surface and the other surface of the coupling portion so as to be recessed in the longitudinal direction of the coupling portion to be slidably inserted into the vertical concave portion,
Wherein the vertical concave portion of the second fastening plate has a space corresponding to a distal end of the engaging portion so as to insert the end of the engaging portion, and a pair of flanges are provided in the opening of the engaging portion, ,
Wherein the flange is provided with a plurality of flange adhesive holes passing through the flange,
And an adhesive is provided in the space of the second fastening plate so that when the fastening part slides and is inserted into the space of the second fastening plate, the adhesive in the space flows out through the flange adhesive hole so that the fastening part and the second fastening plate Fixed,
The through hole is formed in the coupling portion, the through hole is formed in the web of the steel beam, and the coupling member is inserted into the through hole of the coupling portion and the through hole of the steel beam, In addition,
And a plurality of coupling flow paths provided in a longitudinal direction of the coupling portion and having a semicircular cross section perpendicular to the longitudinal direction on the surface of the coupling portion contacting the steel beam,
And a composite structure of a reinforced concrete column and a steel beam joining the joining portion and the steel beam, through which the adhesive flows through the coupling passage. delete delete delete The method according to claim 1,
The engaging portion and the second fastening plate are vertically connected to each other, and at least one stiffener is provided between the engaging portion and the support plate to fix the engaging portion and the support plate,
Wherein the stiffener is a composite structure of a reinforced concrete column and a steel beam made of polypropylene, polyimide or polyethylene teraphthalate. The method according to claim 1,
A waterproof coating part is provided on an outer surface of the coupling part and the second fastening plate,
Wherein the waterproof coating portion is a UV curable polymer, which is a composite structure of a reinforced concrete column and a steel beam, which comprises a UV curable urethane resin or a UV curable epoxy resin cured by UV irradiation and having insulation. The method according to claim 6,
The waterproof coating portion is formed by irradiating a UV curable polymer with UV to cure the UV curable polymer,
Wherein the UV curable urethane based resin is urethane acrylate, and the UV curable epoxy based resin is an epoxy acrylate.

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