KR100665246B1 - Precast concrete connection structure using Fiber Reinforced Plastics construction - Google Patents

Abstract

The present invention relates to a hollow precast connection structure using an FRP structure, comprising: a pillar body forming a hollow portion therein and a reinforced concrete column composed of a reinforcement member made of glass fiber FRP or carbon-glass fiber FRP in the hollow portion. After installing the reinforcement reinforced concrete beam in the horizontal direction on the top of the column, while reinforcing the reinforcement in the hollow of the reinforced concrete column or without reinforcement of the reinforcement, After the formwork is installed between the beams, the concrete is placed and cured in the molding space so that the reinforced concrete columns can be placed on the same vertical line, thereby increasing the weight of the pillars when transporting the precast columns to the site. It is reduced, so it is easy to carry and lift. In addition, a high tensile strength FRP reinforcement can be used as a permanent structure to ultimately achieve structural stability of the building, especially in the case of a large-sized member, a hollow type using an FRP structure that can be precast. The connection structure of the precast column.

Fiberglass FRP or carbon-glassfiber FRP, fiber-reinforced plastics, reinforcements, reinforced concrete, columns, beams, formwork, permanent structures

Description

Precast concrete connection structure using Fiber Reinforced Plastics construction

1 is a perspective view showing a hollow precast pillar using the FRP structure according to the present invention,

2A and 2B are plan views showing a state in which reinforced concrete beams are mounted on a hollow precast column using an FRP structure according to the present invention;

3a to 3c is a vertical cross-sectional view showing a connection structure in which the hollow precast pillar using the FRP structure according to the present invention connected to each other,

Figures 4a to 4e is a construction step by step showing a connection structure in which the hollow precast pillar using the FRP structure according to the present invention is connected to each other.

<Explanation of symbols for the main parts of the drawings>

10: pillar body 11: hollow part

20: reinforcing material 21: glass fiber FRP

22: carbon fiber FRP 30: beam

40: formwork 50,51: rebar

52: reinforcing bar 53: reinforcing bar for column connection

60: binding member 70: concrete

The present invention relates to a connection structure of a hollow precast pillar using an FRP structure, and more particularly, a pillar body forming a hollow portion therein and a reinforcing member made of glass fiber FRP or carbon-glass fiber FRP in the hollow portion. Reinforced concrete pillars are produced at the factory and brought into the site, and the reinforced concrete beams with reinforced rebars are installed in the horizontal direction at the top of the column, and the reinforcement is placed in the hollow of the reinforced concrete column or without reinforcement without reinforcement. After installing the formwork between the beam and the beam, and then cast concrete in the molding space and the state of the hardened, the hollow precast column using the FRP structure to place the reinforced concrete column on the same vertical line again The connection structure of the.

In general, the construction method of reinforced concrete pillars in the construction site, the site casting method for placing concrete directly at the site by manufacturing the formwork, the prefabricated method for manufacturing and assembling the reinforced concrete column to a suitable size in advance in the factory or the site, That is, there is a precast concrete method.

Among these methods, the above-mentioned site pouring method requires a lot of professional personnel, materials, and air due to the formwork, and thus, refrains from the formwork in recent years, and adopts precast method to standardize members, simplify the process, and labor. Pursuit of productivity

However, in the precast method, when the reinforced concrete pillars are enlarged, it is difficult to transport and lift the pillars due to excessive weight, and when large pillars are still needed, general formwork is installed on the site, reinforcing bars, and then concrete is poured. Since the reinforced concrete construction method is used as it is, it does not solve the problems mentioned above.

Therefore, the present invention has been invented to solve the above problems, in the factory a reinforced concrete column composed of a reinforcement made of a pillar body and a hollow fiberglass FRP or carbon-glass fiber FRP in the hollow body therein Produce and install into the site, install reinforcement reinforced concrete beam in the horizontal direction at the top of the column, reinforce the reinforcement to the hollow part of the reinforced concrete column or reinforce it without reinforcement of the reinforcing bar, beam and beam After installing the formwork in between, the concrete is placed in the molding space and hardened, so that the reinforced concrete pillars can be placed on the same vertical line, thereby reducing the weight of the pillars when transporting the precast pillar to the site Easy to carry and lift, improving overall air shortening and construction In addition, a high tensile strength FRP reinforcement is used as a permanent structure, which can ultimately improve the structural stability of the structure, especially in the case of a large-size member, a hollow free using a FRP structure that can be precast. The purpose is to provide a connection structure for the cast column.

Hereinafter, the features of the present invention for achieving the above object are as follows.

In the precast reinforced concrete pillar according to the present invention,

It characterized in that the hollow portion 11 is configured to include a reinforcement 20 in the pillar body 10 and the hollow portion 11 formed in the longitudinal direction therein.

In particular, the reinforcing material 20 is characterized in that the fiberglass FRP (21) and the carbon fiber FRP (22) composite material is wound and laminated in a mold, respectively, and then cured.

In addition, the reinforcing material 20 is characterized in that it is produced by curing, after winding the glass fiber FRP 21 to the mold.

In addition, in the connection structure of the precast reinforced concrete pillar according to the present invention,

Winding the glass fiber FRP 21 or the glass fiber FRP 21 and the carbon fiber FRP (22) to the pillar body 10 and the hollow portion 11 is formed in the longitudinal direction inside the hollow 11 in the mold While installing the reinforced concrete beam 30 in the horizontal direction on the pillar body 10 on a precast reinforced concrete column made of cured reinforcement 20, the reinforcement 50 in the hollow part 11 of the reinforced concrete column After reinforcement or without a reinforcing bar without a bar 50, the formwork 40 is installed between the beam 30 and the beam 30, and then cast concrete 70 in the molding space to harden In addition, the reinforcement concrete pillars to be positioned on the same vertical line, characterized in that consisting of a structure connecting the columns and the pillars.

In particular, the reinforced concrete beam 30 is characterized in that the reinforcing bar 52 is arranged in the body, the upper and lower portions of the beam 30 are bent and extended in the vertical direction, respectively, protruded.

In addition, the reinforcing bar 52 is characterized in that the column connecting reinforcing bar 53 having a predetermined length is supported and fixed in the binding form by the binding member 60.

In particular, the column connection reinforcing bar 53, when the construction without a reinforcing bar 50 in the reinforced concrete column, characterized in that the binding to both the upper, lower reinforcement of the reinforcing bar 50.

On the other hand, the reinforcing bar 53 is connected to the reinforcing bar 50 in the reinforced concrete column, when the construction, the reinforcing bar 50 is reinforced in the upper, lower reinforcement and hollow portion 11 of the reinforcing bar (52) All of them are characterized in that can be bound.

The reinforcing bar for reinforcing column 53, when constructing the reinforcing bar 50 in the reinforced concrete column, can bind only the bottom of the reinforcing bar in the upper, lower reinforcement and hollow portion 11 of the reinforcing bar 52 It is characterized by.

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

1 is a perspective view showing a hollow precast column using the FRP structure according to the present invention, Figures 2a and 2b is a state in which the reinforced concrete beam is mounted on the hollow precast column using the FRP structure according to the present invention 3A to 3C are vertical cross-sectional views showing connection structures in which hollow precast columns using FRP structures according to the present invention are connected to each other.

In the reinforced concrete column according to the present invention, as shown in FIG. 1, the pillar body 10 is the same as a conventional precast reinforced concrete column, but the difference is that only the hollow part 11 is formed therein. And a reinforcing material 20 made of glass fiber FRP 21 or glass fiber FRP 21 and carbon fiber FRP 22 mounted on the hollow part 11 for constructing a post concrete column. There is a focus on using the reinforcing material 20.

This can achieve weight savings due to the empty space as much as the hollow portion 11, which is then produced in the factory, and then easy to transport and lift to the construction site.

In addition, the hollow part 11 is equipped with a reinforcement for constructing a post concrete pillar 20 formed by a winding method, and the reinforcement 20 is a carbon-glass fiber reinforcement 20. That is, after the glass fiber FRP (21) and carbon fiber FRP (22) composite material is wound in a laminated structure in a circular or square shape, respectively, the cured reinforcement (20) or glass fiber FRP (21) in the mold After that, as a cured reinforcement (20), after carrying in and installed into the site, when the concrete 70 is placed in the hollow portion 11 plays a role in supporting the structural weight of the concrete (70).

Then, after the concrete 70 is cured, the glass fiber reinforcement or carbon-glass fiber reinforcement 20 is integrated with the concrete 70 to play a part of the structural role of the reinforcing bar 50, and thus, glass fiber reinforcement. Reinforced concrete pillars to which 20 or carbon-glass fiber reinforcement 20 is applied can be expected to reduce the amount of rebar (50).

On the other hand, the reinforcing bar 51 is around the corners of the hollow portion 11 of the pillar body 10 is reinforced, or is installed without a reinforcing bar 51.

In particular, when the reinforcing bar 51 is reinforced, according to the width of the reinforced concrete beam 30, the reinforcing bar 51 may protrude more than the fixing length from the top of the column body 10 may be connected into the pouring portion, or the reinforced concrete When interfering with the beam 30, it is constructed so as not to protrude.

At this time, the reinforcing bar 51 is arranged around the corner of the hollow portion 11 of the pillar body 10 can be connected only to the pour space between the pillar and the pillar.

In constructing the reinforced concrete columns connected to each other according to the present invention configured as described above, FIGS. 4A to 4E are step-by-step diagrams illustrating a connection structure in which hollow precast columns using FRP structures are connected to each other.

Referring to the construction step with reference to this, first, the reinforced concrete pillars are produced at the factory and installed in the installation site.

In this way, the reinforced concrete beam 30 on the top of the reinforced concrete pillars are installed in the horizontal direction to the center of the pillar (see Fig. 2a and 2b).

At this time, the reinforcing bar 52 is reinforced in the body of the reinforced concrete beam 30, the reinforcing bar 52 is formed to protrude by extending more than the fixing length from one end of the body of the beam 30, the reinforcing bar ( 52 is arranged in the upper and lower portions of the beam 30, respectively.

At this time, in the reinforcing bar 52 extending and protruding from the beam 30, the upper reinforcing bar 52 is composed of a bending structure bent in a right angle to the upper direction, while the lower reinforcing bar 52 is After being configured to face downward, it is possible to insert into the hollow portion 11 of the reinforced concrete column.

In particular, the bar connecting rods 53 having a predetermined length connecting the reinforcing bars 52, which are each bent in the vertical direction, can be supported and fixed in a binding form by a binding member 60 such as a wire bar. When constructing in a concrete state without reinforcement of the reinforcing bar 50 in the concrete column, the upper and lower parts of the reinforcing bar 52 is bound to the column connecting reinforcing bar (53) to support and fix (see FIG.

In addition, when reinforcing the reinforcement (50) in the reinforced concrete pillars, the reinforcing bar reinforcement (53) together with the reinforcement (50) installed in the hollow portion 11 together with the upper and lower reinforcement of the reinforcement (52) In this case, the reinforcing bar 50 which is bound to the upper reinforcing bar of the prosthetic bar 52 is constructed without the binding of the binding member 60, or is firmly bound through the binding member 60 to be constructed ( 3b and 3c).

4A to 4E according to the present invention shows a step in which reinforced concrete columns are connected in a dry state without reinforcement of the reinforcing bar 50.

As described above, the internal space of the reinforcement 20 in which the concrete 70 is poured in the state in which the reinforcement 20 is installed in the hollow part 11 formed inside the pillar body 10, that is, a cross-sectional shape of a circular or square shape After installing the reinforcing bar 50 in a circular form at regular intervals in the pouring space to form a reinforcement, or without reinforcement of the reinforcing bar 50, the empty space between the beam 30 and the beam 30 In the space, that is, the pouring space, the form 40 is installed at the same shape and size as that of the corner of the column and the height of the beam 30.

Next, in the state in which the concrete 70 is poured and hardened, the other hollow reinforcement concrete columns are placed on the same vertical line on the horizontally reinforced steel beam 30, and then again Repeat the work, such as constructing the column in stages.

As described above, the present invention provides a pillar body 10 having a hollow portion 11 formed therein in the longitudinal direction and a glass fiber FRP 21 or a glass fiber FRP 21 and a carbon fiber FRP 22 in the hollow portion 11. Reinforced concrete pillars made of reinforcing material (20) made of a factory produced in the factory and carried in the installation site, and then installed in a structure connected to each other, and then cast the concrete 70 on the hollow portion 11, the reinforcement As the weight of the concrete column is reduced, it is easy to transport and lift, so that the overall air shortening and workability can be improved.In particular, the glass fiber FRP (21) and carbon fiber FRP (22) composite materials are wound into a mold in a laminated structure, respectively. Winding the reinforcing material (20) or glass fiber FRP (21) produced by curing, and then the reinforcing material (20) produced by curing is installed in the hollow portion 11 of the column, the FRP reinforcement (20) itself is reinforced concrete Reinforce the column Is used in the ferroconcrete structure is the role at the same time so that a permanent structural complement of reinforcement (50) acts it is possible to achieve the ultimate structural stability of the building.

As described above, according to the connection structure of the hollow precast column using the FRP structure according to the present invention, by forming a hollow inside the reinforced concrete column, the weight of the column can be reduced to precast even a large member, Easy to carry and lift, there is an effect that can improve the overall air shortening and construction.

In addition, high tensile strength FRP stiffeners can be used as permanent structures to obtain more robust reinforced concrete columns.

Claims (9)

delete delete delete In the connection structure of the precast reinforced concrete column, Winding the glass fiber FRP 21 or the glass fiber FRP 21 and the carbon fiber FRP (22) to the pillar body 10 and the hollow portion 11 is formed in the longitudinal direction inside the hollow 11 in the mold While installing the reinforced concrete beam 30 in the horizontal direction on the pillar body 10 on a precast reinforced concrete column made of cured reinforcement 20, the reinforcement 50 in the hollow part 11 of the reinforced concrete column After reinforcement or without a reinforcement without the reinforcing bar 50, install the formwork 40 between the beam 30 and the beam 30, and then cast concrete 70 in the molding space to harden , The connection structure of the hollow precast pillar using the FRP structure, characterized in that the reinforcement concrete columns to be placed on the same vertical line, consisting of a structure connecting the columns and the columns. The method according to claim 4, The reinforced concrete beam 30 is a hollow type using an FRP structure, characterized in that the reinforcing bar 52 is arranged in the body, the upper and lower portions of the beam 30 are bent and extended in the vertical direction, respectively Connection structure of precast column. The method according to claim 5, Connection structure of the hollow precast pillar using the FRP structure, characterized in that the reinforcing bar 52 is fixed to the column connection reinforcing bar 53 having a predetermined length in the form of a binding by the binding member 60. The method according to claim 6, The column connecting reinforcing rod 53 is hollow when using the FRP structure, characterized in that when the construction in a reinforced state without reinforcing bar 50 in the reinforced concrete column, both the upper and lower reinforcement of the reinforcing bar 50 Connection structure of precast column. The method according to claim 6, The reinforcing bar 53 is connected to the reinforcing bar 50 in the reinforced concrete column, when the construction, the upper and lower reinforcement of the reinforcing bar 52 and the reinforcing bar (50) to be reinforced in the hollow 11 Connection structure of the hollow precast pillar using the FRP structure characterized in that the binding. The method according to claim 8, The reinforcing bar for reinforcing column 53, when constructing the reinforcing bar 50 in the reinforced concrete column, can bind only the bottom of the reinforcing bar in the upper, lower reinforcement and hollow portion 11 of the reinforcing bar 52 Connection structure of the hollow precast pillar using the FRP structure.

Images