KR102109468B1 - Hybrid Beam System for Underground Parking Using Post Tension - Google Patents

Abstract

A hybrid beam system for an underground parking lot utilizing post tension according to an aspect of the present invention includes at least a pillar having an extension extending integrally from the upper side, and a plate plate at an end coupled to one side of the extension. One or more steel beams, and the plate plate coupled to the extension portion facing each other may include a tension hardware for generating tension in the pillar.

Description

Hybrid Beam System for Underground Parking Using Post Tension}

The present invention relates to a hybrid beam system for an underground parking lot using post-tension, and more specifically, by using post-tensioning in concrete when combining reinforced concrete pillars and steel beams that are two different members installed in the underground parking lot. It relates to a hybrid beam system for an underground parking lot using post tension that can be easily joined.

In the architectural structure used in the conventional building structures, a single structure using a material such as a pillar and a beam is generally used, such as a reinforced concrete structure, a steel structure, or a steel reinforced concrete structure, and such a single structure forms each specialized field. Systematically. The double-reinforced concrete structure is a structure that reinforces reinforcing steel reinforced reinforced steel in concrete that is strong in compressive force but very weak in tensile force, and is used most structurally or economically, but this reinforced concrete structure has many advantages. Nevertheless, since the cross-section and weight of the member are large, and concrete must be poured and cured in accordance with the progress of the construction, it takes a lot of time for the construction work, and it is difficult to perform uniform construction, so there is a disadvantage that thorough management is required.

In addition, the steel structure is made of steel with superior strength and ductility compared to reinforced concrete, so it can absorb a lot of deformation energy due to earthquake, wind, and shock, and is advantageous for high-rise or ultra-high-rise buildings or long span buildings. On the other hand, there is a disadvantage that the member is easily buckled with respect to the compressive force, and the strength is reduced or deformed easily due to high temperature during welding connection, and is easily rusted by moisture. However, in recent years, buildings have been enlarged and super-sized in terms of scale, and complex and diversified in terms of functionality, and thus the single structure as described above is unsuitable to the needs of buildings due to the properties of the material, and the construction conditions and economical There were also disadvantages in terms of aspect.

For this reason, research into new composite structures that take advantage of each structural system and graft each other has been actively conducted to improve structural performance and reduce air and labor costs.

In such a composite structure, the pillar member has a large compressive force, so it is used as an economical and efficient reinforced concrete to receive the compressive force. In the long span structure, the beam of the member is relatively less dancing than the reinforced concrete member. do.

In a composite structure using reinforced concrete columns and steel beams, the design of a composite structure where reinforced concrete columns meet steel beams is very important. Reinforced concrete and steel frame are materials with different material properties, and the part where the two members are joined is an important part that transmits the stress acting on the structure and is an important part that affects the safety of the entire structural system. Therefore, through many studies so far, design proposals for composite structures of reinforced concrete columns and steel beams have been proposed.

In general, in the case of joining a composite structure of a reinforced concrete column and a steel beam installed in a conventional underground parking lot, a cross-shaped steel beam is installed on the reinforced concrete column, the pillars of the column are reinforced on the four corners of the reinforced concrete column, and the shear reinforcement of the steel beam is performed. A reinforcing method was used to form a hole in the web and constrain the main root of the column.

However, this method requires accurate positioning of the hole in the web of the steel frame beam, drilled, and then inserting the shear reinforcing bar of the pillar into the hole, which is difficult and difficult to perform in the construction site.

The present invention has been devised to solve the above problems, and the object of the present invention is to more firmly and simply join when reinforcing reinforced concrete pillars and steel beams that are two different members installed in an underground parking lot by utilizing post tension. It is to provide a hybrid beam system for underground parking lot using post tension.

A hybrid beam system for an underground parking lot utilizing post tension according to an aspect of the present invention for achieving the above object is coupled to one side of the pillar and an extension having an extension that extends integrally from the upper side. It may include at least one steel beam having a plate plate at the end, and a tension hardware for generating tension in the pillar by connecting the plate plates coupled to the extension portions facing each other.

The pillar extends from the ground and is formed from the body, and the extension portion extending from at least one side of the upper body to be coupled to the end of the steel beam, and provided inside the body and the extension portion to enhance the strength of the pillar. Reinforcing bars for reinforcing, and after the steel beam is coupled to the end portion of the extension portion may be provided with concrete poured into the body and the extension portion.

The extension may further include a coupling reinforcing bar that is fixed through the ends of the pillar and the steel beam to connect the pillar and the steel beam.

The tension hardware is connected to both ends of the steel frame beam, the fixing pipe formed through the pillar, the fixing iron formed through the inside of the fixing pipe to improve the strength of the pillar by the tension, and both ends of the fixing pipe It is provided in each can be provided with a fixing device for fixing the fixing hardware is generated tension.

The fixing device may be equipped with a tensioning device coupled to both ends of the fixing hardware to generate a tension by pulling the fixing hardware, and a fixing device for fixing the fixing hardware generated by the tensioning device.

According to the hybrid beam system for an underground parking lot utilizing the post tension according to the present invention, when combining two different members, a reinforced concrete column and a steel beam, the steel beams and the extensions facing each other are coupled through the coupling bars, so that they are rigid and simple. It can be installed.

In addition, since the post tension is applied to the pillar to apply tension, the compressive stress of the concrete is formed to make the pillar more firmly formed.

1 is a cross-sectional view showing a hybrid beam system for an underground parking lot utilizing post tension according to an embodiment of the present invention.
Figure 2 is a side cross-sectional view showing a state in which the pillar and the steel beams are bonded according to an embodiment of the present invention.
Figure 3 is a cross-sectional side view showing a state in which the tension and tension steel fittings according to an embodiment of the present invention is bonded to the pillar and the steel beam.
Figure 4 is a cross-sectional view showing a state that the tension hardware is settled according to an embodiment of the present invention.
5 is a perspective view showing a state of fixing the tension hardware shown in FIG.
6 is a flow chart showing a method of joining a hybrid beam system for an underground parking lot using post tension according to an embodiment of the present invention.

Hereinafter, a hybrid beam system for an underground parking lot using post tension according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a side cross-sectional view showing a hybrid beam system for an underground parking lot using post tension according to an embodiment of the present invention, and FIG. 2 is a side cross-sectional view showing a pillar and a steel beam according to an embodiment of the present invention. 3 is a side cross-sectional view showing a state in which a pillar and a steel frame beam are joined by tensioning a tension hardware according to an embodiment of the present invention.

1 to 3, the hybrid beam system for an underground parking lot using post tension according to an embodiment of the present invention includes a pillar 100 and a steel frame beam 200 formed of two different reinforced concrete members. It is to insert the tension hardware 500 by utilizing post tension so that it can be joined more firmly and conveniently.

Such, two different members of the pillar system formed of a reinforced concrete and the joint system for coupling the steel beam 200 is a pillar 100 having an extension portion 120 extending integrally from the upper side, and the extension At least one steel beam 200 having a plate plate 210 at an end coupled to one side of the portion 120 and the plate plate 210 connected to the extension portions 120 facing each other are connected to each other By providing a tension hardware 500 for generating tension in the pillar (100).

The pillar 100 includes a body 110 that is formed to extend from the ground, and the extension portion 120 that extends from at least one side of the upper portion of the body 110 and is coupled to an end of the steel frame beam 200, Reinforcing bars 130 for reinforcing the strength of the pillar 100 provided inside the body 110 and the extension part 120, and the steel beam 200 coupled to an end of the extension part 120 After the body 110 and the extension portion 120 may be provided with a concrete 140 is poured.

The body 110 is a combination of the reinforcing bar 130 to reinforce the tensile force due to the properties of the concrete 140, which is strong in compressive force but weak in tensile force, and the reinforcing bar 130 and concrete 140 are integrated with respect to external force. Works. The body 110 is the same as the reinforced concrete column 100 that receives a high axial force used in a general construction site, and it may be possible to use a precast manufactured in the field or pre-manufactured in a factory.

In the reinforcing bar 130, a plurality of vertical main bars in the vertical direction and a shear reinforcing bar 130 surrounding the vertical main bar horizontally may be repeatedly installed inside the body 110 at regular intervals.

The extension part 120 may be provided with a predetermined length on the upper side of the body 110, and the extension part 120 may be formed to extend from four opposite sides according to a position disposed in the building, It may be formed extending from two sides forming a 90 degree angle, or may be formed extending from three sides such as a T-shape.

In addition, the inside of the extension part 120 may be repeatedly installed with a plurality of horizontal plinths in the horizontal direction and shear bars 130 vertically surrounding the horizontal plinths at regular intervals.

In addition, the extension part 120 further adds a coupling reinforcing bar 130 that is fixed through the ends of the pillar 100 and the steel frame beam 200 to connect the pillar 100 and the steel frame beam 200 to each other. It can be provided.

The coupling reinforcing bar 130 is for connecting the pillar 100 and the steel frame beam 200 in order to use the tension steel 500, and may be omitted.

The coupling reinforcing bar 130 may secure the integrity of the pillar 100 by connecting the steel beams 200 facing each other with the pillar 100 interposed therebetween. At this time, in order for the coupling reinforcing bar 130 to be connected to the steel beam 200, the coupling bar 130 and the tension steel 500 penetrate the plate plate 210 provided at the end of the steel beam 200. At least one through-hole 211 may be provided.

In addition, the coupling reinforcing bar 130 may be formed of a reinforcing bar 130 that is generally the same as or larger in diameter than the reinforcing bar 130 used for the pillar 100, and both ends of the coupling reinforcing bar 130 are fixed hardware. 400 may be formed in a spiral shape to be spirally coupled.

In addition, the coupling reinforcing bar 130 may be formed in a predetermined length to simultaneously penetrate each of the plate plates 210 coupled to both ends of the pillar 100 and the extension portion 120.

When the fixing hardware 400 is provided with the pillar 100 therebetween and penetrates the coupling reinforcing bar 130 facing each other, when the pillar 100 and the steel beam 200 are coupled, the coupling reinforcing bar 130 It may be formed of a fixing nut that is spirally coupled to a spiral groove formed at an end of the coupling reinforcing bar 130 protruding from the pillar 100 and the other side.

The fixing nut may be formed of a high-tension nut so as not to be separated after being coupled to the coupling reinforcing bar 130, or may be closed by welding or the like after being combined.

In addition, the fixing nuts may be provided on both sides of the coupling reinforcing bar 130 penetrating the steel beam 200. At this time, by fastening each fixing nut in advance to the coupling reinforcing bar 130 passing through the steel beam 200 provided on both sides around the pillar 100, the ends of the steel beam 200 are fixed. Can be.

In addition, in order to fix the coupling reinforcing bar 130, it can be replaced by a coupler that is coupled to the outside of the plate plate 210 instead of the fixing hardware 400 to receive and fix the coupling reinforcing bar 130 inside. have.

The steel frame beam 200 may be provided with plate plates 210 at both ends, and the plate plate 210 may be fastened to the steel frame beam 200 by welding and high-strength bolts.

The steel beam 200 may be disposed between the extensions 120 of the adjacent pillars 100, and the steel beam 200 is adjacent to the pillars according to the position of the pillar 100 installed in the building. (100) are connected in a + -shape, T-shape or a-shape, and generally H-shaped steel can be used.

In general, the upper and lower portions of the steel frame beam 200 are defined as flanges, and a portion connecting the upper and lower flanges is defined as a webbra. Like the pillar 100, the steel frame beam 200 may also be manufactured in a form required in a work site through welding or the like, or may be manufactured in a form required in a work site in advance in a factory.

In addition, since the steel frame beam 200 is not disposed through the interior of the pillar 100, there is no interference between the vertical bar inside the body 110 and the steel frame beam 200. Therefore, as in the prior art, there is no need to focus on the four corners of the pillar 100 and focus on the four corners of the pillar 100.

As described above, when the steel frame beam 200 and the pillar 100 are joined by the coupling reinforcing bar 130, the reinforcing bar 130 is reinforced to the extension part 120, and the body 110 and the extension part 120 ) To the concrete 140, the reinforcing bar 130 together with the coupling reinforcing bar 130 may have a binding force by the concrete 140.

At this time, the steel beam 200 may be installed a slab 700 on the upper portion, when reinforcing the reinforcing bar 130 in the extension portion 120 may be reinforcing the reinforcing bar 130 in the slab 700. .

The tension hardware 500 is connected to both ends of the steel frame beam 200 and is formed by passing through the pillar 100, the fixing pipe 510 and the fixing pipe 510, which are formed through the inside of the fixing pipe 510. A fixing hardware 511 for improving the strength of the pillar 100 and a fixing device 600 provided at both ends of the fixing pipe 510, respectively, to fix the fixing hardware 511 where tension is generated may be provided. have.

The fixing pipe 510 may be a sheath for inserting the fixing hardware 511 before filling the concrete 140 with the pillar 100. When the pillar 100 is manufactured, the fixing pipe 510 is installed in the process of reinforcing the coupling reinforcing bar 130. In the process of pouring the concrete 140, the concrete 140 is partially damaged by the pouring pressure or the impact of the vibrator. Or a predetermined strength is maintained so as not to cause defects in the joint.

In addition, both ends of the fixing pipe 510 may be coupled to the plate plate 210 of the steel frame beam 200 coupled to the ends of the pillars 100, and both ends of the fixing pipe 510 may be plate plates. It can be opened by being coupled to the through hole 211 provided in the (210).

In addition, the fixing pipe 510 may be provided with elasticity to be fluidly variable by the tension of the fixing hardware 511 accommodated therein. At this time, in order to be fluidly variable, the fixing pipe 510 may be formed of a material in which a number of pipes are connected or provided with fluidity.

The fixing pipe 510 may be formed in a rigid structure so that the concrete 140 does not flow into the inside.

The fixing hardware 511 may be formed of steel wires flowing into the fixing pipe 510, and a plurality of steel wires may be provided with twisted and many of them arranged at equal intervals, or may be formed of steel rods having a large diameter.

In addition, the fixing hardware 511 can be settled through the inside of the fixing pipe 510 regardless of the order after the concrete 140 is poured into the pillar 100 or after the concrete 140 is cured. have.

In addition, the fixing hardware 511 may be fluidly variable when a tension force is applied by the fixing device 600 and penetrates through the plate plate 210 of the steel frame beam 200 provided at both ends of the pillar 100. It may be provided. At this time, the anchoring hardware 511 may be fixed by the anchoring device 600 after penetrating the steel frame beam 200 or the tension may be applied after the concrete 140 is cured.

4 to 5, the fixing device 600 is coupled to both ends of the fixing hardware 511, the tensioning device 610 pulling the fixing hardware 511 to generate tension, and the tensioning device ( 610) may be provided with a fixing device 620 for fixing the fixing hardware 511 is generated tension.

The tensioning device 610 is one end of the fixing hardware 511 to apply tension to the fixing hardware 511 when it is cured after pouring concrete 140 on the pillar 100 provided with the fixing pipe 510 It may be provided in.

And the tensioning device 610 is formed so that the fixing hardware 511 is penetrated, the tension is applied to the concrete 140 by pulling the fixing hardware 511 and applying tension to the pillar 100. It is possible to reduce creep that plastic deformation occurs in a member under a long load.

The tensioning device 610 applies tension to the concrete 140 by pulling the fixing hardware 511 by hydraulic pressure or a motor, and the tensioning device 610 may be variously formed.

The fixing device 620 may fix the fixing hardware 511 at both ends so that when the tensioning force is applied by the tensioning device 610, the tensioning force is not released.

The fixing device 620 is coupled to the tension nut 621 to fix the tension nut 621 fixed to the plate plate 210 and the fixing hardware 511 penetrating the tension nut 621. A fixed body 622 may be provided.

The tension nut 621 is fixed to the plate plate 210 and is formed at the same position as the through hole 211 and is opened to allow the fixing hardware 511 to penetrate. In addition, the tension nut 621 may be formed in a conical shape to be combined with the fixed body 622.

In addition, the fixing body 622 may be formed in a shape in which an outer circumferential surface surrounds the tension nut 621 and spirally coupled to the tension nut 621, and the inner circumferential surface is conical in shape protruding toward the tension nut 621. It can be formed and accommodated inside the tension nut 621.

The fixing body 622 is formed by opening the center so that the fixing hardware 511 penetrates the same as the tension nut 621, and the inner circumferential surface of the conical shape is fixed as it is combined with the tension nut 621. Can be fixed more strongly.

As described above, when a tension force is applied to the fixing hardware 511, the fixing pipe 510 may be filled with grout to maintain the tension in a fixed state.

The slab 700 is cast with concrete 140 on the pillars 100 and the steel frame 200, and may mainly form a floor surface of the building, and the concrete 140 placed on the slab 700 is It is characterized in that it has a lower strength than the concrete 140 poured on the pillar 100. In order to economically construct the entire building structure, first, the pillar 100 as a vertical member is cast with high strength concrete 140 in a range of about 27 MPa to 50 MPa, and then the slab 700 as a horizontal member is about 21 MPa to It can be cast with low strength concrete 140 in the range of 36 MPa. Thus, the strength ratio of the concrete 140 poured on the body 110 and the concrete 140 poured on the slab 700 may be determined within a range of about 1.2 to 1.4 times.

6 is a flowchart illustrating a method of joining a hybrid beam system for an underground parking lot using post tension according to an embodiment of the present invention.

As shown in FIG. 6, in order to join the hybrid beam system for an underground parking lot utilizing post tension according to an embodiment of the present invention, the reinforcing bar 130 forming the body 110 of the pillar 100 may be reinforced. In addition, the formwork 900 for pouring concrete 140 on the reinforcing bar 130 may be installed.

Further, in order to form the extension part 120 protruding from the upper side of the pillar 100, the formwork 900 is further installed horizontally from the top of the formwork 900 and the formwork 900 is fixed to fix the formwork 900. A copper bar 800 may be installed at a lower portion.

At this time, the formwork 900 may be installed up to a position where the extension part 120 and the steel frame beam 200 are in contact, and may be installed up to the side of the extension part 120 to form the extension part 120. Can be.

The steel frame beam 200 is disposed at the end of the formwork 900 so that the steel frame beam 200 can be joined to the end of the extension part 120.

In addition, when the steel beam 200 is joined, a slab 700 formwork 900 may be provided between a plurality of steel beams 200 forming a floor.

A coupling reinforcing bar 130 and a fixing tube 510 may be installed to penetrate the plate plate 210 of the steel frame beam 200 installed to face each other with the pillars 100 interposed therebetween.

At this time, the coupling reinforcing bar 130 may be coupled through a through hole 211 provided in the plate plate 210.

A fixing hardware 400 may be installed at an end of the coupling reinforcing bar 130 penetrating the plate plate 210 to fix the coupling reinforcing bar 130.

In addition, after the fixing hardware 511 is penetrated inside the fixing pipe 510, both ends of the fixing hardware 511 may be fixed through the plate plate 210.

After arranging the coupling reinforcing bar 130 and the fixing hardware 511, when the steel beams 200 facing each other are joined to the pillar 100, the reinforcing bar 130 may be reinforced to the extension part 120.

At this time, the reinforcing bar 130 forming the bottom on the top of the slab 700 at the same time as the extension portion 120 may also be reinforced.

Concrete 140 may be poured into the extension part 120 and the body 110, and concrete 140 having a lower strength than the pillar 100 may be poured into the slab 700.

When the concrete 140 is cured, the fixing iron 511 may be fixed after applying a tension through the fixing device 600 to form a compressive stress on the concrete 140.

In the above, a hybrid beam system for an underground parking lot using post tension according to an embodiment of the present invention has been described, but the spirit of the present invention is not limited to the embodiment presented herein. And, those skilled in the art who understand the spirit of the present invention can easily propose other embodiments by adding, changing, deleting, adding, or the like components within the scope of the same spirit, but also within the scope of the present invention. It will be said.

100: pillar 110: body
120: extension 130: rebar
140: concrete 200: steel beam
210: plate plate 300: reinforcing bar
400: fixed hardware 500: tension hardware
510: Settlement tube 511: Settlement hardware
600: fixing device 610: tensioning device
620: fixing device

Claims (5)

A pillar having an extension part integrally extending from the upper side,
At least one steel frame beam having a plate plate at the end coupled to one side of the extension,
It is provided with a tension hardware for connecting the plate plate coupled to the extension portion facing each other to generate tension in the pillars,
The tension hardware is connected to both ends of the steel frame beam, the fixing pipe formed through the pillar, the fixing iron formed through the inside of the fixing pipe to improve the strength of the pillar by the tension, and both ends of the fixing pipe Equipped with a fixing device for fixing the fixing hardware is generated, each tension is generated,
The fixing device is coupled to both ends of the fixing hardware, characterized in that it comprises a tensioning device for pulling the fixing hardware to generate a tension, and a fixing device for fixing the fixing iron generated by the tensioning device,
The fixing device is formed in a conical shape, the center is formed and opened at the same position as the through hole of the plate plate, and fixed to the plate plate to form a tension nut and an outer circumferential surface surrounding the tension nut. The hybrid beam for underground parking using post tension, characterized in that it has a fixed body which is spirally coupled to the tension nut and has an inner circumferential surface protruding toward the tension nut and accommodated inside the tension nut. system
According to claim 1,
The pillar is a body formed extending from the ground,
The extension portion extending from at least one side of the upper body and coupled to the end of the steel beam,
Reinforcing bars are provided inside the body and the extension to reinforce the strength of the pillar,
A hybrid beam system for an underground parking lot utilizing post tension, characterized in that the steel beam is coupled to the end of the extension, and then the concrete is poured into the body and inside the extension.
According to claim 1,
The extension is a hybrid beam system for an underground parking lot using post tension, characterized in that it further comprises a coupling reinforcing bar that is fixed through the ends of the pillar and the steel beam to connect the pillar and the steel beam.
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