KR20060024170A - System for constructing composite reinforced concrete girders and beams using frp - Google Patents

Abstract

The present invention relates to a composite reinforced concrete beam construction system using a FRP structure used as a permanent structure, in particular by employing a structure fabricated by using carbon fiber FRP and / or glass fiber FRP material as the formwork for beam construction, The FRP structure itself serves as a formwork and at the same time used as a permanent structure in a composite reinforced concrete beam structure without additional dismantling, it can be expected to reduce the quantity of rebar used in the construction of the beam. The present invention relates to a composite reinforced concrete beam construction system using a FRP structure, which can be deleted and used as a permanent structure, which has advantages of reducing construction costs and shortening of air, as well as environmentally friendly construction by reducing generation of waste materials.

Carbon-glass fiber composite structure, fiber reinforced plastic, FRP, composite reinforced concrete beam, permanent structure, carbon fiber, glass fiber, column, bracket, formwork

Description

System for constructing composite reinforced concrete girders and beams using FRP}             

1 is a schematic view showing a pillar support state of the carbon-glass fiber composite structure according to the present invention,

2 is a cross-sectional view taken along the line 'A-A' of FIG. 1,

3 is a cross-sectional view taken along the line 'B-B' of FIG. 1,

Figure 4a to 4c is a perspective view showing a manufacturing example of the carbon-glass fiber composite structure according to the present invention,

5a to 5c is a schematic view showing an example of a support state of the carbon-glass fiber composite structure according to the present invention,

Figure 6 is a plan view showing the arrangement of the carbon-glass fiber composite structure for the construction of the intermediate beam in the present invention,

Figure 7 is a connection state between the structure for the construction of the intermediate beam and the pillar-supported carbon-glass fiber composite structure in the present invention,

8A and 8B are schematic views showing an example of a connection state between the beam construction structure and the deck plate according to the present invention.

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

1: frame pillar 10: bracket

20: carbon-glass fiber composite structure 21, 22a, 22b, 23, 24: steel plate for reinforcement

26: rib 30: composite structure for intermediate beam construction

The present invention relates to a composite reinforced concrete beam construction system using a FRP structure used as a permanent structure, and more specifically, to adopt a structure manufactured by winding using carbon fiber FRP and / or glass fiber FRP material as a formwork for beam construction In particular, the FRP structure itself serves as a formwork and at the same time used as a permanent structure in the composite reinforced concrete beam structure without additional dismantling process, complementing the role of reinforcing bar, it can be expected to reduce the amount of steel used in the construction of the beam, The present invention relates to a composite reinforced concrete beam construction system using a FRP structure, which can be used as a permanent structure, which can be eliminated formwork, reduce construction costs, and shorten the air and reduce the generation of waste materials. .

Since the first reinforced concrete buildings were built in the 1910s, many reinforced concrete structures have been constructed through the development of the construction industry.

Of course, reinforced concrete buildings are constructed using composite materials of concrete and rebar as members.

Concrete has a high compressive strength and is a very economical material as a compressive material, but the tensile strength of concrete is only about 8% to 15% of the compressive strength, so it is required to be reinforced on the tensile side to be used as a structural material. It has been applied to compensate for this disadvantage of concrete.

Reinforced concrete buildings have many disadvantages in spite of advantages such as durability, molding, etc. Typically, there are long disadvantages of air, and other problems caused by formwork and installation and disadvantages of long span structure and cracks. Adverse effects of the resulting structure and the like.

Among the reinforced concrete buildings that are being applied now, a large part of the air is the manufacturing and installation of formwork and the reinforcement and assembly of reinforcing bars.

On the other hand, when concrete is poured, it cannot be formed without formwork because it is in a dough state.

That is, in order to form concrete beams during construction, beam formwork that can cast concrete beams must be installed. Concrete beams protrude downward from the ceiling of the building, so to form such concrete beams, the beam formwork protrudes into a cylindrical shape. Must be installed.

Typically, the formwork for the beam construction is assembled by installing a plurality of plywood formwork made of lumber and plywood, each plywood formwork for side and bottom molding is assembled and installed according to the shape of the beam, and then the interior of the plywood formwork After the reinforcement work to install reinforcing bar in the space, the concrete is filled in the formwork and then cured. After curing, the formwork is dismantled to go through a series of work to complete the desired structure.

At this time, the reinforced reinforcing bar reinforces the bearing capacity of the cured concrete, thereby obtaining a solid concrete beam.

Of course, after installing the formwork for beam construction to support other slab construction formwork, such as deck plate, and to form the beam and slab at the same time to form the beam and slab each side of the slab to form the beam and slab.

However, the conventional concrete formwork manufacturing and installation process as described above not only occupies a considerable part of the air and construction costs, in particular, since the dismantling process must be carried out, there is a problem that excessive workforce and time are required.

In addition, since the reinforcement of the formwork is required to reinforce a large amount of reinforcing bars after the installation of the formwork, the air becomes inevitably long. have.

In addition, if the cracks are generated when the concrete is exposed and the air and water are introduced through the cracks, the concrete and the reinforcing bars can be easily corroded, and thus the entire structure can be deteriorated. Occurs.

In addition, a large amount of waste materials such as plywood formwork is generated, which is a major cause to adversely affect environmental factors.

Therefore, the present invention has been invented to solve the above problems, by employing a structure fabricated using carbon fiber FRP and / or glass fiber FRP material as a formwork for beam construction, in particular, this FRP structure itself At the same time, it is used as a permanent structure in the composite reinforced concrete beam structure without additional dismantling process, complementing the role of reinforcing bar, which can be expected to reduce the quantity of reinforcing steel used in the construction of the beam, and the form dismantling process can be deleted. The purpose is to provide a composite reinforced concrete beam construction system using FRP structure that has environmental advantages by reducing the generation of waste materials along with the advantages of construction cost reduction and air shortening.

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

The present invention is a reinforced concrete beam construction system,

Brackets are fixed to a predetermined height in accordance with the height of the beam construction on each pre-constructed pillar;

형 단면구조의 형태로 제작되고, 양단부가 두 기둥상의 상기 브라켓에 체결 및 지지되어서 고정 설치되되, 내부의 철근 배근 및 콘크리트 타설과 양생 후에 철근 콘크리트 보와 일체화되어서 본 구조물인 복합 철근 콘크리트 보를 구성하게 되는 FRP 구조체;Formwork for reinforced concrete beam construction with beam forming space using FRP material

It is manufactured in the form of a cross-sectional structure, and both ends are fastened and supported by two brackets on the two pillars, and are fixedly installed, and are integrated with reinforced concrete beams after reinforcement and concrete pouring and curing inside, thereby constructing a composite reinforced concrete beam of the present structure. An FRP structure;

Characterized in that it comprises a.

In particular, the FRP structure is characterized in that the glass fiber FRP structure produced by the winding method using the glass fiber FRP material.

In another embodiment, the FRP structure is characterized in that the carbon fiber FPP and the inside of the fiberglass FRP by winding the glass fiber FRP on the outside of the laminated structure to the inside and outside of the carbon fiber FRP.

In another embodiment, the FRP structure is wound around the glass fiber FRP to the outside of the carbon fiber FRP on the bottom portion such that the plate-shaped carbon fiber FRP is located on the bottom portion, the side portion is composed of only the glass fiber FRP, the bottom portion Carbon fiber FRP and glass fiber FRP is characterized in that the laminated structure in and out.

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

The present invention relates to a composite reinforced concrete beam construction system using a FRP structure used as a permanent structure, a carbon-glass fiber composite structure (FRP structure), that is, carbon fiber fiber reinforced plastics (FRP: Fiber Reinforced Plastics) The main point is to use the structure made of fiber reinforced plastic composite as a formwork for reinforced concrete beam construction.

In particular, the carbon-glass fiber composite structure used as a formwork for building reinforced concrete beams in the present invention is used as a permanent structure of the building without a separate dismantling work after concrete pouring and curing, the advantage of reinforced concrete using a composite material It maximizes the cost and improves the existing shortcomings.

That is, the carbon-glass fiber composite structure acts as a formwork before the concrete is cured to form a variety of forms, and plays a role in supporting the structural weight of the concrete.

After the concrete is cured, the carbon-glass fiber composite structure is integrated with the concrete to play a part of the structural role of the reinforcing bar. As a result, the reinforced steel concrete beam to which the carbon-glass fiber composite structure is applied is constructed, thereby reducing the amount of rebar. Can be expected, the formwork dismantling process can be eliminated, reducing the number of workers and working time.

The present invention will be described in more detail with reference to the following drawings.

1 is a schematic view showing the pillar support state of the carbon-glass fiber composite structure according to the present invention, Figure 2 is a cross-sectional view taken along the line 'A-A' of Figure 1, Figure 3 is a line of Figure 1 Sectional view taken along 'B-B'.

4A and 4B are perspective views illustrating an example of manufacturing the carbon-glass fiber composite structure according to the present invention.

First, the composite reinforced concrete beam construction system of the present invention described later puts out that it can be applied to the construction of the ground and underground structures.

In FIG. 1 and FIG. 2, reference numeral 1 denotes a vertical column for a frame, in which a H-shaped steel is used, or a composite steel tube column, ie, a concrete filled steel tube (CFT), in which concrete is filled in a circular or square steel pipe instead of an H-shaped steel. Columns (round or square steel pipe columns) are used.

1 and 2 show an example in which a CFT column is installed.

This CFT column 1 exhibits high member strength and excellent deformation performance by increasing the strength of the filled concrete due to the restraining effect of the steel pipe and the local buckling reinforcement effect of the steel pipe by the filled concrete.

Therefore, when the CFT column 1 is applied, it is possible to reduce the column cross-sectional area or increase the column spacing so that the effective space can be easily secured, and the column rigidity is increased as compared with general structures such as H-beams.

The CFT column 1 is installed as an SRC composite column 2 through reinforcing bar 3 and formwork (not shown) and concrete treatment to be used as the present structure (used as a permanent structure of the building).

Reference numeral 10 denotes a bracket fixed to the CFT column 1, which is a vertical column for a frame, which is a structure for constructing the reinforced concrete beam of the present invention, that is, a carbon-glass fiber composite structure 20 to be described below. ) Is a bracket for supporting.

The bracket 10 is fixed at a predetermined height in accordance with the beam construction height in each CFT column (1), and is fixed on the outer circumferential surface of the CFT column (1) by welding or bolting.

In addition, reference numeral 20 denotes a structure for constructing a reinforced concrete beam that serves as a mold for forming a reinforced concrete beam, that is, a formwork in the present invention.

In particular, the reinforced concrete beam construction structure 20 according to the present invention is a structure produced by winding the carbon-glass fiber composite structure (FRP structure), that is, the carbon fiber FRP on the inside and the glass fiber FRP on the outside.

형 단면구조를 가지도록 성형 제작된다.Here, the carbon-glass fiber composite structure 20 should be manufactured in a shape that can replace the existing beam formwork, generally as shown in Figure 3 to fit the shape of the beam having a rectangular cross-sectional structure.

Molded and manufactured to have a cross-sectional structure.

형 단면구조의 탄소-유리섬유 복합 구조체(20)는 섬유 와인딩(winding) 공법을 이용하여 제작되며,

형 형틀에 와인딩 후 양생하여

형 단면구조의 튜브를 선 제작한 후 이 튜브의 한쪽 면을 절단하여

형 단면구조가 되도록 제작하게 된다.Such

Carbon-glass fiber composite structure 20 of the cross-sectional structure is manufactured using a fiber winding method,

Curing after winding in the mold

After making a tube with a cross-sectional structure, cut one side of the tube

It is manufactured to have a cross-sectional structure.

In fabricating the carbon-glass fiber composite structure 20, as described below, a portion to be fastened with a bracket, a portion to which a wire for suspension is connected, and a portion to which an intermediate beam construction structure is connected, a portion to which a deck plate is fastened Reinforcing iron plates 21, 22a, 22b, and 24 are inserted therein at appropriate positions of parts connected with other parts, such as reinforcing iron plates on both inner and outer sides of the laminated carbon-glass fiber composite structure 20. Manufacture by attaching.

That is, as shown in Figs. 4A and 4B, the FRP 25a using the carbon fiber as the reinforcing material has a laminated structure provided on the inside and the FRP 25b using the glass fiber as the reinforcing material is formed on the outside. The reinforcing iron plate is inserted into the inserts 21, 22a, 22b, and 24, or the reinforcing iron plate is attached to both inner and outer surfaces of the laminated carbon-glass fiber composite structure 20.

4A and 4B show a structure in which a carbon fiber FRP 25a layer is laminated on the inner side and a glass fiber FRP 25b layer is laminated on the outer side, and reinforcing iron plates 21, 22a, 22b, and 24 are inserted therebetween. As shown, a plurality of reinforcing iron plates 21, 22a, 22b, and 24 are installed at predetermined multiple positions of the structure 20, respectively.

As such, when designing the structure of the carbon-glass fiber composite structure 20, only the carbon fiber FRP 25a layer laminated on the inside is considered, and the glass fiber FRP 25b layer laminated on the outside supports the shape of the structure. Do it only.

In this case, the outer glass fiber FRP (25b) layer to withstand the thermal power during the fire does not require a separate fire-resistant coating.

4C shows another example of manufacturing the carbon-glass fiber composite structure, which first manufactures the carbon fiber FRP 25a in a plate-like structure, and then places the carbon fiber FRP 25a in the bottom portion. It is a structure produced by winding the glass fiber FRP (25b) on the outside after the installation in the mold so that.

That is, the carbon-glass fiber composite structure of Figure 4c, by winding the glass fiber FRP (25b) to the outside of the carbon fiber FRP (25a) on the bottom surface, such that the carbon fiber FRP (25a) of the plate-like structure is located on the bottom surface, The side part is composed of glass fiber FRP 25b only, and the bottom part is a structure in which carbon fiber FRP 25a and glass fiber FRP 25b are laminated in and out.

And, referring to Figure 4c, the reinforcing iron plate 24 is installed on the side portion can be seen that is attached to both inner and outer surfaces of the glass fiber FRP (25b) forming the side portion.

Of course, the reinforcing iron plate may be installed by inserting the inside of the glass fiber FRP which is a side part.

In addition, although not shown in the drawings, the FRP structure used as a formwork for building a composite reinforced concrete beam in the present invention, carbon fiber FRP instead of the carbon-glass fiber composite structure as described above using both carbon fiber FRP and glass fiber FRP It is possible to implement a FRP structure using only relatively low cost glass fiber FRP.

That is, the glass fiber FRP structure produced by the winding method using only glass fiber FRP can be used.

The reinforcing iron plates 21, 22a, 22b, and 24 are installed to prevent tearing of the structure 20 during bolting or wire connection, and holes are provided at appropriate positions for bolting and wire connection. The structure is formed, and as a whole, the structure 20 has a structure in which a hole is formed.

In addition, the plurality of ribs 26 are protruded on the inner surface of the structure 20 during the fabrication of the structure 20 in order to maintain the integral behavior between the structure 20 and the concrete poured into the space inside the structure 20. do.

As described above, the reinforced concrete beam construction structure 20 of the present invention manufactured by winding the carbon fiber FRP 25a and the glass fiber FRP 25b inside and outside, respectively, has a high tensile strength and is itself reinforced concrete. At the same time, it serves as a permanent formwork in the composite reinforced concrete beam structure without additional dismantling process and complements the reinforcing bar.

On the other hand, the carbon-glass fiber composite structure 20 manufactured as described above should be installed so as to be supported on the frame (1) for the frame according to the height of the construction layer in order to serve as a formwork for reinforced concrete beam construction, on the column (1) It is supported by the bracket 20 fixed to the installation.

One end of the carbon-glass fiber composite structure 20 has a structure supported by one bracket 10 fixed to the pillar 1, as shown in Figs. The additional bracket 10 is fastened by a bolt 27 and fixedly supported.

The carbon-glass fiber composite structure 20 is installed by inserting a reinforcing iron plate 21 having a fastening hole formed at a portion fastened to the bracket 10 and the bolt 27 at an end thereof or having a reinforcing iron plate on both inner and outer surfaces thereof. The bar is attached and fixed to the part where the reinforcing iron plate 21 is installed and the upper surface of the bracket 10 are fastened by bolts 27 in a bonded state.

Instead of fastening with bolts as described above, alternatively, a plurality of stud bolts are welded and installed on the upper surface of the bracket, and each stud bolt is supported at the same time while supporting the end of the carbon-glass fiber composite structure on the bracket. It is also possible to be inserted through each hole formed in advance in the pre-formed, so that the rolling of the structure is prevented at the time of concrete pouring.

At this time, the portion of the carbon-glass fiber composite structure through which the stud bolt is inserted through the reinforcing iron plate having a through-hole is inserted into the inside or installed on both sides of the inside and outside reinforcement iron plate is installed, as in the case of bolt fastening, The stud bolt is inserted through the through hole of the reinforcing steel plate.

As shown in FIG. 2, four brackets 10 may be fixedly installed on one CFT column 1 in each direction, and each bracket 10 supports one end of the structure 20, each carbon-glass fiber. The composite structure 20 is installed so as to be supported between two adjacent pillars 1, wherein both ends of each structure 20 are respectively supported by brackets 10 installed on the two adjacent pillars 1, respectively. It is.

On the other hand, the reinforcement work for installing the reinforcing bars 28 in the interior space of the structure, that is, the rectangular cross-sectional beam forming space in which the concrete is poured in the state in which the structure 20 is installed as described above, and when the concrete for slab Concrete is poured together in the beam forming space to construct a composite reinforced concrete beam.

In installing the reinforcing bars 28 inside the structure 20, as shown in FIGS. 1 and 2, some of the reinforcing bars are long between two structures 20 arranged in a straight line with respect to the pillar 1. It is installed to be connected to pass around the pillar, and the rest of the reinforcing bars blocked by the pillar (1) on the path is installed by folding the end upward or downward.

In FIG. 1 and FIG. 2, reference numeral 2 denotes an SRC composite column constructed by placing concrete after reinforcing bar 3 and formwork (not shown) to the outside of the CFT column 1.

The SRC composite pillar 2 is installed by installing reinforcing bars 3 and formwork to the outside and simultaneously placing concrete in the formwork with the concrete placing of the carbon-glass fiber composite structure 20.

Of course, some of the brackets 10 are permanently embedded in the SRC composite columns 2.

On the other hand, both ends of the carbon-glass fiber composite structure 20 is supported by a bracket 10 fixedly installed on the column 1 as described above, in order to sufficiently withstand the concrete load to be poured, carbon-glass The fiber composite structure 20 may be suspended by wires 3a and 3b to the upper beams 5 of the pillars 1 or pre-constructed, or supported by the copper bars 6 installed on the lower side thereof, Referring to Figures 5a to 5c as follows.

First, FIG. 5A is a schematic view showing a state in which the carbon-glass fiber composite structure 20 of the present invention is supported by a plurality of suspending wires 3a fixed at the upper end of the pillar 1.

In addition, Figure 5b is a case of the non-reinforced inverse suspension formwork method is applied, the carbon-glass fiber composite structure 20 of the present invention by a plurality of suspension wires (3b), the upper end of which is fixed to the pre-constructed upper beam (5) ) Is a schematic diagram showing a supported state.

In order to support the lower carbon-glass fiber composite structure 20 to the upper beams 5 pre-constructed via the suspension wires 3b, the ring on the upper part of the suspension wires 3b in advance before concrete pouring of the upper beams. The connecting member (5a) that can be connected is installed inside the carbon-glass fiber composite structure of the upper beam, and the connecting member (5a) is fixed by inserting the concrete of the upper beam (5).

The connecting member (5a) is passed through the through hole (20a) of the lower surface of the carbon-glass fiber composite structure 20 to build the upper composite reinforced concrete beam (5), the upper portion inside the structure 20, the lower portion It is installed so as to be positioned below the structure 20, and after the concrete placing and curing of the upper beam (5) by connecting the ring of the upper end of the suspension wire (3b) to the ring of the connecting member (5a) by supporting.

In addition, the portion of the lower carbon-glass fiber composite structure 20 to which the suspension wires 3a and 3b are connected is inserted into the reinforcing iron plates 22a and 22b as described above or reinforced on both sides of the inside and outside. An iron plate for mounting is attached and the lower ends of the hanging wires 3a and 3b are connected to the reinforcing iron plates 22a and 22b.

In FIG. 4A, reference numeral 22a denotes reinforcing iron plates to which the lower end of the hanging wire 3a (see FIG. 5A), the upper end of which is fixed to the upper part of the column 1, is connected to the left and right sides of the structure 20 at predetermined intervals. It is arranged to be installed inside the insert or to be attached to both sides of the inner and outer sides of the structure.

In addition, in FIG. 4B, reference numeral 22b is a reinforcing iron plate to which the lower end of the suspension wire 3b (see FIG. 5B), the upper end of which is fixed to the upper beam 5, which is pre-installed, is connected to the lower surface of the structure 20. It is arranged at predetermined intervals and is inserted into the interior or attached to both inner and outer surfaces of the lower surface of the structure.

5C is a schematic view showing a state in which the carbon-glass fiber composite structure 20 of the present invention is supported by the copper bar 6, and after throwing away from the bottom, the concrete 7 is poured, and then The clubs 6 are installed to support the structure 20.

On the other hand, Figure 6 is a plan view showing the arrangement of the structure for constructing the intermediate beam in the present invention, the structure 30 for constructing the intermediate beam is also carried out with the carbon-glass fiber composite structure presented in the present invention.

형 단면구조의 형태로 와인딩 제작되고, 기둥에 의해 지지되는 FRP 구조체(20)와 직각 배치하여 양단부를 나란한 두 기둥 지지 FRP 구조체(20) 사이에 연결 고정하는 방식으로 지지시키게 된다.The intermediate beam construction structure 30 is made of the same material as the FRP structure 20 supported by the above-described pillar having a reinforced concrete beam forming space

Winding is produced in the form of a cross-sectional structure, and is arranged at right angles to the FRP structure 20 supported by the column to be supported in such a way that both ends are connected and fixed between the two column support FRP structure 20 side by side.

That is, the intermediate beam construction FRP structure 30 at the time of fabrication of the carbon-glass fiber composite structure for beam construction (FRP structure supported by the pillar; 20) supported by both pillars as shown in FIG. Both side portions of the portion to which the end of the connection is made in a cut state, and after inserting the end of the intermediate beam construction FRP structure 30 arranged at right angles through the cut portion and the lower portion of the column support FRP structure 20 And bolts in the state where the end lower end portions of the intermediate beam construction FRP structure 30 are joined to each other.

Of course, in order to prevent tearing of the structure after the bolt is fastened, the reinforcing iron plate (23, 31) is also installed in each of the two structural parts that are fastened to each other or the reinforcing iron plate is attached to both sides of each inside and outside In the state where the reinforcing iron plates 23 and 31 are installed, they are fastened with bolts.

In addition, the intermediate beam construction FRP structure 30 installed as described above is also used as a permanent structure without undergoing a dismantling process, and although not shown in the drawing, among them, the FRP structure for construction of the intermediate beam is similar to the FRP structure supported by the pillar. The suspension wire is used to support the pre-constructed upper intermediate beam (see FIG. 5B).

Of course, like the FRP structure 20 supported by the above-described column, the intermediate beam construction FRP structure 30 is also connected to the lower end of the suspension wire (see Fig. 5b) is fixed to the upper upper beam Reinforcing iron plates are provided at positions, which are arranged at predetermined intervals on the lower surface of the structure and are inserted into the interior or attached to both inner and outer surfaces of the lower surface of the structure (see FIG. 4B).

And, similarly to the FRP structure 20 supported by the column, in order to support the lower intermediate beam construction FRP structure 30 with the suspended wire to the upper intermediate beam pre-constructed, the FRP structure for the upper intermediate beam construction A connecting member for connecting the upper end of the hanging wire is installed, and the connecting member is installed in the upper part and the lower part of the structure through the lower part of the structure through the hole.

In FIG. 6, reference numeral 8 denotes a deck plate, which is a formwork structure for slab construction, and as illustrated, simply install deck plate 8 on both beam construction FRP structures 20 and 30 and install concrete. When pouring, it is possible to install deck slabs.

The deck plate 8 is supported in such a manner that it spans between the intermediate beam construction FRP structure 30 and both ends of the beam construction FRP structure 20 supported by the column, and thus the FRP structures 20 and 30. ) And the deck plate (8) after the concrete can be installed at the same time or by post-installation of the beam and slab can be constructed in a way.

8A and 8B are schematic diagrams showing an example of a connection state between the deck construction FRP structure and the deck plate according to the present invention, wherein the deck plate 8 is the intermediate beam construction FRP structure 30 and both ends of the pillar It shows a structure that is fixed across and fixed between the beam construction FRP structure 20 supported by.

As the supporting structure of the deck plate 8, as shown in FIG. 8A, it consists of the bending structure which bend | folded both ends of the deck plate 8 downward, and this bent part 8a is formed by both FRP structures 20, The structure which supports the deck plate 8 by bolting in the state joined with the side part of 30 is possible.

As another method, as shown in FIG. 8B, after the separate fastening brackets 8b are protruded and installed on the lower surface of both ends of the deck plate 8, the respective fastening brackets 8b and the respective FRP structures 20 and 30. The structure which supports the deck plate 8 by fastening with a bolt in the state which joined the side part of () is possible.

Of course, in order to prevent tearing of the FRP structure after bolting, etc., the side plates of the FRP structures 20 and 30, which are parts fastened to the deck plate 8 and the bolts, have separate reinforcing iron plates 24 and 32 therein. Inserts are installed or attached to both sides.

In this way, the composite reinforced concrete beam construction system using the FRP structure according to the present invention, as a form for constructing reinforced concrete beams using a structure produced by winding the carbon fiber FRP on the inside and the glass fiber FRP on the outside According to the present invention, in particular, the FRP structure itself serves as a reinforced concrete beam formwork, and at the same time used as a permanent structure in a composite reinforced concrete beam structure without a separate dismantling bar to supplement the role of the reinforced bar, reinforced concrete beam construction It can be expected to reduce the quantity of rebar used in the construction, the form dismantling process can be eliminated, and the number of workers and working time can be reduced.

As described above, according to the composite reinforced concrete beam construction system using the FRP structure used as a permanent structure according to the present invention, as the formwork for reinforced concrete beams, winding the carbon fiber FRP on the inside and the glass fiber FRP on the outside By using the carbon-glass fiber composite structure produced by the, has the following advantages.

1) The high tensile strength FRP structure itself acts as a composite reinforced concrete beam formwork and is used as a permanent structure in the composite reinforced concrete beam structure without additional dismantling process. You can expect a decrease.

2) Formwork can be simplified and form dismantling process can be eliminated, thus reducing the number of workers and working time, enabling quick installation, and greatly reducing the cost spent on formwork, reducing overall construction cost and air. There is a shortening effect.

3) A high tensile strength FRP structure is used as a permanent structure to obtain a stronger composite reinforced concrete beam. It can be applied to the cross section where high moment resistance is required in the small cross section, the cross section of the same strength can be reduced by the excellent structural performance, and the effective space configuration becomes possible.

4) Since the concrete beam is not exposed to the outside by the carbon-glass fiber composite structure, the corrosion of concrete and reinforcing steel can be minimized, and the corrosion resistance of the carbon-glass fiber composite structure having excellent corrosion resistance against the underground structure that may be exposed to moisture Application ensures maintenance of the cross-section performance of the member. It is possible to construct buildings without fear of cracks and corrosion, and reduce maintenance costs.

5) Because it is a lightweight material, it has the advantage of simplifying the installation and concrete pouring process, and does not generate waste materials such as plywood formwork, which adversely affects environmental factors. Clean site maintenance is possible, and environmentally friendly construction is possible by reducing waste generation.

6) When the composite reinforced concrete structure using carbon-glass fiber composite material is used, the long span structure is constructed at the cost of constructing the reinforced concrete structure because of the advantage of using high tensile and high compressive concrete of carbon fiber itself. And the concrete long span structure enables excellent space design. Lightweight long span structures can be used not only for building structures but also for social overhead capital, which is expensive to maintain such as bridges.

7) Since the fiberglass FRP of the carbon-glass fiber composite structure acts as a fireproof material in the completed reinforced reinforced concrete beams, no additional fireproof coating is required.

Claims (21)

In reinforced concrete beam construction system, Brackets are fixed to a predetermined height in accordance with the height of the beam construction on each pre-constructed pillar; Formwork for composite reinforced concrete beam construction with beam forming space using FRP material

It is manufactured in the form of a cross-sectional structure, and both ends are fastened and supported by two brackets on the two pillars, and are fixedly installed, and are integrated with reinforced concrete beams after reinforcement and concrete pouring and curing inside, thereby constructing a composite reinforced concrete beam of the present structure. An FRP structure; Composite reinforced concrete beam construction system using the FRP structure used as a permanent structure, characterized in that it comprises a. The method according to claim 1, The reinforced concrete beam construction system using the FRP structure used as a permanent structure, characterized in that the FRP structure is a glass fiber FRP structure produced by the winding method using a glass fiber FRP as a single material. The method according to claim 1, The FRP structure is Composite reinforced concrete beam construction system using FRP structure used as a permanent structure, characterized by winding the carbon fiber FRP inward and winding the glass fiber FRP outward to stack the carbon fiber FRP and the glass fiber FRP inwards and outwards. . The method according to claim 1, The FRP structure is Winding the glass fiber FRP to the outside of the carbon fiber FRP on the bottom part so that the plate-shaped carbon fiber FRP is located on the bottom part, the side part is composed of only the glass fiber FRP, and the bottom part is laminated to the inside and outside of the carbon fiber FRP. Reinforced concrete beam construction system using an FRP structure used as a permanent structure, characterized in that the structure is composed of. The method according to claim 1, The FRP structure is, The reinforcing steel plate having a fastening hole formed in the portion fastened to the bracket and the bolts at both ends connected to the brackets has an insert-installed structure, which bolts the portion where the reinforcing steel plate is installed and the upper surface of the bracket to each other in a joint state. Composite reinforced concrete beam construction system using a FRP structure used as a permanent structure, characterized in that. The method according to claim 1, The FRP structure is, Reinforcing steel plates having fastening holes formed at both ends of the brackets and bolts are attached to the inner and outer sides of the brackets and bolts. Composite reinforced concrete beam construction system using the FRP structure used as a permanent structure characterized in that the fastening. The method according to claim 1, The FRP structure is, The reinforcing iron plate is inserted into the side portion or the lower surface to which the hanging wire is connected so that the hanging wire can be connected, and is supported by a plurality of hanging wires connected to the reinforcing iron plate from the upper beam or the pre-constructed upper beam. Composite reinforced concrete beam construction system using the FRP structure used as a permanent structure, characterized in that the. The method according to claim 1, The FRP structure is, The reinforcing iron plate is attached to both sides of the inner and outer sides of the side or lower surface to which the hanging wire is connected so that the hanging wire can be connected. A composite reinforced concrete beam construction system using an FRP structure used as a permanent structure, characterized in that it is supported by a wire. The method according to claim 7 or 8, In order to support the lower FRP structure on the upper beam pre-constructed by the hanging wire, the FRP structure of the upper beam is provided with a connecting member that can be connected to the hook of the upper end of the suspension wire, the connecting member is a lower portion of the composite structure A composite reinforced concrete beam construction system using a FRP structure used as a permanent structure, characterized in that the upper portion is installed inside the composite structure through the through hole, and the lower portion is installed below the composite structure. The method according to claim 1, The FRP structure is, The reinforcing steel plate having a fastening hole is inserted into the structure in which the fastening hole is formed at the end of the deck plate or at the side surface at which the bolt is fastened to the end of the deck plate so that the deck plate for the slab construction can be fixedly supported. Composite reinforced concrete beam construction system using the FRP structure used as a permanent structure, characterized in that the fastening portion of the plate and the deck plate is fastened to each other in the bonded state. The method according to claim 1, The FRP structure is, Reinforcing iron plate formed with fastening holes is attached to the inner and outer sides of the deck plate to the side of the deck plate or the side of the bolt plate and the fastening bracket installed at the end so that the deck plate for the slab construction can be fixedly supported. The composite reinforced concrete beam construction system using the FRP structure used as a permanent structure, characterized in that the fastening portion of the reinforcing iron plate is installed and the fastening portion of the deck plate is bonded to each other. The method according to claim 1, The FRP structure is, A composite reinforced concrete beam construction system using a FRP structure, which is used as a permanent structure, characterized in that a plurality of ribs are protruded on an inner surface for integral action with concrete poured into an interior space. The method according to claim 1, Reinforced concrete beam forming space made of the same material as the FRP structure supported on the column

Winding fabricated in the form of a cross-sectional structure, and is connected between the two side-by-side FRP structure is fixed, and the intermediate beam to form a composite reinforced concrete intermediate beam, which is integrated with the reinforced concrete beam after reinforcement and concrete pouring and curing inside Composite reinforced concrete beam construction system using the FRP structure used as a permanent structure, characterized in that it further comprises a structure for construction. The method according to claim 13, The intermediate beam construction structure, The composite reinforced concrete beam construction using the FRP structure used as a permanent structure, characterized in that the bottom portion is bolted and fixed to the bottom portion of the FRP structure in a bonded state through the cut side surface of the FRP structure supported by the pillar system. The method according to claim 14, The bolt fastening portion of the FRP structure supported by the intermediate beam construction structure and the pillar has a structure in which a reinforcing iron plate having a fastening hole is inserted therein, so that the bolts are fastened in an overlapping state. A composite reinforced concrete beam construction system using an FRP structure used as a permanent structure. The method according to claim 14, The bolt fastening portion of the FRP structure supported by the intermediate beam construction structure and the pillar has a structure in which reinforcing iron plates having fastening holes are attached to both inner and outer surfaces, respectively, and overlapped portions of the reinforcing iron plates installed thereon. Composite reinforced concrete beam construction system using the FRP structure used as a permanent structure, characterized in that bolted in. The method according to claim 13, The intermediate beam construction structure, The reinforcing iron plate is inserted into the lower surface portion to which the hanging wire is connected so that the hanging wire can be connected, and is supported by a plurality of hanging wires connected to the reinforcing iron plate from the upper intermediate beam. Composite reinforced concrete beam construction system using FRP structure used as permanent structure. The method according to claim 13, The intermediate beam construction structure, The reinforcing iron plate is attached to both inner and outer sides of the lower surface portion to which the hanging wire is connected so that the hanging wire can be connected, and is supported by a plurality of hanging wires connected to the reinforcing iron plate from the upper intermediate beam. Composite reinforced concrete beam construction system using the FRP structure used as a permanent structure, characterized in that the. The method according to claim 17 or 18, In order to support the structure of the lower intermediate beam construction with the suspended wire to the upper intermediate beam pre-installed, the structure for constructing the upper intermediate beam is provided with a connection member that can be connected to the hook of the upper end of the suspension wire, this connection member The composite reinforced concrete beam construction system using the FRP structure used as a permanent structure, characterized in that the upper part is installed inside the structure through the lower portion of the temporary structure, the lower part is installed below the structure. The method according to claim 13, The intermediate beam construction structure, The reinforcing steel plate having a fastening hole is inserted into the structure in which the fastening hole is formed at the end of the deck plate or at the side surface at which the bolt is fastened to the end of the deck plate so that the deck plate for the slab construction can be fixedly supported. Composite reinforced concrete beam construction system using the FRP structure used as a permanent structure, characterized in that the fastening portion of the plate and the deck plate is fastened to each other in the bonded state. The method according to claim 13, The intermediate beam construction structure, Reinforcing iron plate formed with fastening holes is attached to the inner and outer sides of the deck plate to the side of the deck plate or the side of the bolt plate and the fastening bracket installed at the end so that the deck plate for the slab construction can be fixedly supported. The composite reinforced concrete beam construction system using the FRP structure used as a permanent structure, characterized in that the fastening portion of the reinforcing iron plate is installed and the fastening portion of the deck plate is bonded to each other.

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