KR200383490Y1 - 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 a 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.

Description

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

The present invention relates to a composite reinforced concrete beam construction system using a FRP structure used as a permanent structure, and more specifically, a structure fabricated by 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 was devised to solve the above problems, and by employing a structure fabricated using carbon fiber FRP and / or glass fiber FRP material as a formwork for beam construction, in particular, the FRP structure itself is a beam. 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, in the reinforced concrete beam construction system,

A bracket installed on the steel pile of the retaining wall and the column for each frame in accordance with the height of the beam construction, and each bracket is installed in the concrete placing line to be completely embedded in the basement outer wall and the SRC composite pillar;

Having a beam forming space using FRP as a material It is made of a cross-sectional structure, and is connected between the retaining wall and the frame pillar and between the adjacent frame pillars, the end of which is fixed and supported by the reinforcing steel plate to each bracket, and is installed inside the reinforcement and An FRP structure integrated with reinforced concrete beams after concrete pouring and curing to form a composite reinforced concrete beam;

It is made, including, the FRP structure is characterized in that each end including the fastening portion with the bracket is inserted into the concrete placing line so that it can be completely embedded into the basement outer wall and SRC composite pillar.

In particular, the end portion embedded in the SRC composite pillar in the FRP structure is characterized in that it is provided with a hole used for pouring the concrete while passing through the reinforcing bar connected up and down inside the SRC composite pillar.

In addition, the FRP structure has an angle installed in the longitudinal direction along the upper end of both side portion is provided in one piece form with this angle, it characterized in that the deck plate can be supported over the angle.

In addition, the side portion of the angle and the side portion of the FRP structure superimposed therethrough is characterized in that a plurality of suspension holes provided with a lower end of the suspension wire is connected.

In addition, the upper portion of the bracket installed in the steel pile of the retaining wall is characterized in that the waterproof index plate is inserted to block the water flowing through the retaining wall to move toward the FRP structure along the bracket.

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 fiber reinforced plastics (FRP) structure, which is used as a permanent structure, and a carbon-glass fiber composite structure (which is a FRP structure), that is, carbon fiber fiber reinforced plastic and fiberglass fiber reinforced The structure made of plastic composite material is used as formwork for building reinforced concrete beams.

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 a building without separate dismantling work after concrete placement and curing. Advantages of reinforced concrete using composite materials 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.

This invention is described in more detail with reference to the following drawings as follows.

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'.

In addition, Figures 4a and 4b is a perspective view and a plan view showing an embodiment of the carbon-glass fiber composite structure according to the present invention, Figures 4c to 4e is a perspective view showing another embodiment.

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

The composite reinforced concrete beam construction system according to the present invention is fixed to the construction height of the steel pile of the earth wall and the column for each frame, and can be completely embedded in the basement outer wall and the SRC composite column. Brackets are respectively installed in the concrete pouring line position for the SRC composite pillar; Having a beam forming space using FRP as a material It is made of a cross-sectional structure, and is connected between the retaining wall and the frame pillar and between the adjacent frame pillars, the end of which is fixed and supported by the reinforcing steel plate to each bracket, and is installed inside the reinforcement and It includes; FRP structure that is integrated with the reinforced concrete beam after concrete pouring and curing to form a composite reinforced concrete beam.

First, when the end of the FRP structure (carbon-glass fiber composite structure) in the present invention will be described a structure that is connected and supported by the bracket to the frame pillar.

In FIG. 1 and FIG. 2, reference numeral 1 denotes a frame pillar (or CFT column in this specification), in which a H-shaped steel is used, or a synthetic steel pipe pillar in which concrete is filled in a circular or square steel pipe instead of H-shaped steel, that is, Concrete filled steel tube (CFT) columns are used.

1 and 2 show an example in which the CFT column 1 using the square steel pipe 1a 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 constructed as a steel framed reinforced concrete (SRC) composite column (2) through the installation of reinforcement and pillar formwork (not shown) of the reinforcement (3) to the outside, concrete treatment (2) Used as a permanent structure for buildings).

The 'column concrete pour line' indicated in FIG. 1 represents an outer line of concrete poured into the column formwork from the SRC composite pillar 2, which is an outer line of the SRC composite pillar 2.

Reference numeral 10 denotes a bracket fixedly installed on the CFT column 1, which is a frame column, which is a FRP structure for constructing the reinforced concrete beam of the present invention in the CFT column 1, that is, a carbon-glass fiber composite structure described later (20). ) 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, the bracket 10 is provided with a plurality of fastening holes 11 for fastening bolts with the carbon-glass fiber composite structure 20 to be described later.

In particular, in the present invention, the bracket 10 is installed to be completely embedded in the SRC composite column (2).

That is, the bracket 10 is installed on the CFT column 1, which is a frame pillar, the whole of which is located inside the pillar formwork for the concrete construction of the SRC composite column 2 (inside the column concrete pour line) It is installed so that it can be completely embedded in the concrete that is poured into the pillar formwork.

Accordingly, the bracket 10 is completely embedded in the SRC composite pillar 2 together with the end of the carbon-glass fiber composite structure 20 to be described later in the state in which the construction of the SRC composite pillar 2 is completed. Not visible

As such, the entire bracket 10 is completely embedded in the SRC composite pillar 2, so that the fastening means between the bracket 10 and the structure 20 as well as the fastening portion with the carbon-glass fiber composite structure 20, that is, the bolt The 27a, the nut 27b, and the like are not exposed out of the SRC composite column 2, and the appearance can be improved.

1 and 2, the entire bracket 10 together with the end of the carbon-glass fiber composite structure 20 is located inside the concrete placing line of the SRC composite pillar 2 (inside the completed SRC composite pillar Landfilled).

On the other hand, reference numeral 20 represents a FRP structure (or carbon-glass fiber composite structure in the present specification) for constructing a reinforced concrete beam, that is, a formwork for forming a reinforced concrete beam in the present design, that is, a formwork.

Reinforced concrete beam construction FRP structure 20 according to the present invention, the carbon-glass fiber composite structure, that is, the FRP structure produced by winding the carbon fiber FRP on the inside and the glass fiber FRP on the outside Can be used.

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.

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, the reinforcing iron plate 21 is connected to the joint portion of the bracket 10 or the FRP structure for constructing the intermediate beam (reference numeral 30 in FIG. 8) is connected. 8 is manufactured by inserting the reference numeral 23) inside or by attaching it to both inner and outer surfaces.

In other words, the FRP 25a using carbon fiber as a reinforcing material is manufactured so that the FRP 25b using glass fiber as a reinforcing material has a laminated structure provided outside, and the reinforcing iron plates 21 and 23 are interposed therebetween. It is manufactured by inserting or attaching a reinforcing iron plate to both sides inside and outside the carbon-glass fiber composite structure 20 having a laminated structure.

4a to 4e is a layer of carbon fiber FRP (25a) layer on the inside, the glass fiber FRP (25b) layer is laminated on the outside, the part and the intermediate beam construction FRP structure 30 for fastening the bracket 10 is connected The single part of the FRP structure 20 which inserted the reinforcing iron plates 21 and 23 between two FRP (25a, 25b) layers at the site | part to which it is shown is shown.

When designing the structure of the carbon-glass fiber composite structure 20, only the carbon fiber FRP 25a layer laminated on the inside may be considered, and the glass fiber FRP 25b layer laminated on the outside supports the shape of the structure. You can only do it.

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.

Of course, when designing the structure of the carbon-glass fiber composite structure 20, both the carbon fiber FRP 25a layer laminated on the inside and the glass fiber FRP 25b layer laminated on the outside may be considered.

4A and 4B illustrate a carbon-glass fiber composite structure 20 in which a FRP structure for constructing an intermediate beam, which will be described later, is not connected, and FIG. 4C shows a FRP structure (reference numeral 30 in FIG. 8) for constructing an intermediate beam. Carbon-glass fiber composite structure produced by cutting one side portion of the portion where the end is connected, Figure 4d is a carbon-glass fabricated by cutting both side portions of the portion where the end of the intermediate beam construction FRP structure 30 is connected The fiber composite structure 20 is shown, respectively.

FIG. 4E shows another embodiment of the carbon-glass fiber composite structure, which first manufactures the carbon fiber FRP 25a into a plate-like structure, and then forms the carbon fiber FRP 25a so that it can be located at the bottom portion. It is a structure produced by winding the glass fiber FRP (25b) on the outside after installation.

That is, the carbon-glass fiber composite structure of FIG. 4E is manufactured by winding the glass fiber FRP 25b to the outside of the carbon fiber FRP 25a on the bottom so that the carbon fiber FRP 25a of the plate structure is located on the bottom. The side part consists only of the glass fiber FRP 25b, and the bottom part has a structure in which the carbon fiber FRP 25a and the glass fiber FRP 25b are laminated in and out.

And, although not shown in the drawings, the carbon-glass fiber composite structure in the present invention, instead of the carbon-glass fiber composite structure as described above using both carbon fiber FRP and glass fiber FRP, is relatively lower than carbon fiber FRP It can be implemented with a FRP structure using only glass fiber FRP.

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

In addition, the reinforcing iron plates 21 and 23 installed at the fastening portion with the bracket 10 and the fastening portion with the FRP structure 30 for constructing the intermediate beams may prevent tearing of the structure 20 during bolting. It is installed in order to have a through hole formed in a suitable position for fastening the bolt, as a whole has a structure in which a hole is formed in the structure 20 itself.

Further, in order to maintain the integral behavior between the structure 20 and the concrete poured into the space inside the structure 20, a plurality of ribs 26 are provided on the inner surface of the structure during the fabrication of the structure 20. Install to protrude.

In addition, the carbon-glass fiber composite structure 20 in the present invention, each end including the fastening portion with the bracket 10 is inserted into the pillar formwork (inside the pillar concrete placing line) SRC composite pillar (2) It is characterized in that it is embedded with the bracket 10 inside, and in particular, the hole 20a used for placing the concrete concrete along with passing up and down the reinforcing bars 3 inside the SRC composite pillar 2 in the part to be embedded. ) Is the main feature in that it is formed.

As the hole 20a is embedded in the SRC composite pillar 2 as the carbon-glass fiber composite structure 20 is embedded in the SRC composite pillar 2, the rebar 3 passing up and down in the SRC composite pillar 2 is formed at the end of the structure 20. It is provided to pass through, and also provided so that the hose or pipe to which the concrete is supplied at the time of pillar concrete pouring can penetrate downward.

1 and 2, it can be seen that the end of the carbon-glass fiber composite structure 20 is located in the SRC composite pillar 2 (column concrete placing line), the reinforcing iron plate at the end portion of the buried portion (21) It can be seen that holes (20a) for the passage of reinforcing bars (3) and cast concrete one by one on both sides are formed.

In the embodiment of FIG. 2, two holes 20a are formed at the end of each structure 20, but the number and position thereof can be changed appropriately, and a plurality of rebars may pass through each hole 20a. have.

In FIG. 1, reference numerals 28a and 28b denote upper and lower reinforcing bars respectively disposed in the carbon-glass fiber composite structure.

In addition, the carbon-glass fiber composite structure 20 according to the present invention is provided in one piece with an angle 29 installed in the longitudinal direction along the upper sides of both sides, and for the slab construction on the angle 29. The deck plate (denoted by reference numeral 8 in FIGS. 8 and 9) can be supported, and the side wires of the angle 29 for supporting the deck plate and the side portions of the structure 20 superimposed thereon are suspended wires ( In FIG. 6A and FIG. 6B, a plurality of suspension holes 29a through which lower ends of the reference numerals 3a and 3b are connected are formed.

As described above, since the carbon-glass fiber composite structure 20 in the present invention is manufactured in a state in which the angle 29 is integrally installed, the angle 29 is supported after the structure 20 is supported on the bracket 10 in the field. Deck plate (8) can be installed directly by using), and the conventional deck plate widely used in general construction sites, rather than the deck plate having a fastening structure or a fastening bracket, is simply supported on an angle and then fixed by welding. You can work with.

In addition, by allowing the carbon-glass fiber composite structure 20 and the angle 29 integrally installed thereon to be supplied and used in the form of a single unit, any fastening structure or fastening bracket may be separately welded to a general deck plate in the field. No installation is required, and the overall installation of the deck plate is simplified (simplification and efficiency).

In this way, the FRP structure for the reinforced concrete beam construction of the present invention manufactured by winding the carbon fiber FRP and the glass fiber FRP inside and outside, respectively, has a high tensile strength, and itself serves as a reinforced concrete beam formwork. It is used as a permanent structure in the composite reinforced concrete beam structure without dismantling process, and serves to supplement the reinforcing bar.

The carbon-glass fiber composite structure 20 manufactured as described above is installed to be supported on the CFT column 1 according to the height of the construction layer in order to serve as a formwork for reinforced concrete beam construction, and is fixed on the CFT column 1. It is supported by the bracket 20 installed.

One end portion of the carbon-glass fiber composite structure 20 is supported by one bracket 10 fixed to the CFT pillar 1 as shown in FIGS. 1 and 2, wherein In the state where the reinforcing iron plate is installed and the upper surface of the bracket 10 are bonded to each other by fastening with a bolt 27a and a nut 27b.

Instead of fastening with bolts and nuts 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 simultaneously supported while supporting the ends of the carbon-glass fiber composite structure on the bracket. It is also possible to penetrate the through-holes formed in advance at the end of the structure so that the rolling of the structure is prevented at the time of concrete pouring.

At this time, the part where the stud bolt is inserted through at the end of the carbon-glass fiber composite structure is provided with a reinforcing iron plate having a through hole formed therein, or attached to both inner and outer sides, as in the case of fastening the bolt. Allow the stud bolt to be inserted through the through hole.

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 to be supported between two neighboring CFT pillars 1, wherein both ends of each structure 20 are respectively supported by brackets 10 respectively installed on the two neighboring pillars 1. It becomes a structure.

On the other hand, the reinforcement work for installing the reinforcing bars (28a, 28b) 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 then concrete slab for slab When concrete is poured together in the beam forming space, a composite reinforced concrete beam is constructed.

In installing the reinforcing bars 28a and 28b inside the structure 20, as shown in FIGS. 1 and 2, some of the reinforcing bars are arranged in a straight line with respect to the CFT column 1. Install long connections between the) but installed so as to pass around the CFT column (1), the rest of the bars blocked by the CFT column (1) on the path is installed by bending the end up or down.

The SRC composite column (2) is to install the reinforcing bar (3) and pillar formwork (not shown) around the CFT column (1) and then the concrete in the column formwork with the concrete casting of the carbon-glass fiber composite structure (20) Simultaneously pouring and construction, as described above, the entire bracket 10 and the end of the carbon-glass fiber composite structure 20 is permanently embedded in the SRC composite pillar (2).

On the other hand, in the present invention, the FRP structure (carbon-glass fiber composite structure) 20 is mostly installed between two neighboring frame columns (CFT column) (1) so that each end described above in each frame pillar (1) As fastened to and supported by the bracket 10, a part of which is connected between the retaining wall 100 and the frame pillar 1.

The carbon-glass fiber composite structure 20 installed between the retaining wall 100 and the frame pillar 1 is fastened to the bracket 10 of the frame pillar 1 in the same manner as described above, and the other end thereof. Is fastened to the bracket 10a which is welded to the steel pile, for example the H-pile 100a, in the retaining wall 100 (see FIG. 5A).

Figure 5a shows a structure in which the end of the carbon-glass fiber composite structure in the present invention is connected and supported by the bracket of the retaining wall.

In FIG. 5A, reference numeral 101 denotes an underground outer wall constructed by placing concrete on the inner surface of the retaining wall 100.

As shown in Figure 5a, the bracket (10a) is fixed to the construction height of the beam to the H-pile (100a) of the retaining wall 100, in particular to be completely embedded in the basement outer wall 101, Welded and installed inside the concrete pour line of the basement outer wall 101, with the end of the carbon-glass fiber composite structure 20 supported on the bracket 10a, the bolt 27a and the nut as in the CFT column. It is fastened by 27b.

At this time, the end portion of the carbon-glass fiber composite structure 20 is also inserted into the concrete placing line so that a certain portion is embedded in the basement outer wall 101, the portion where the reinforcing iron plate 21 is installed bracket (10a) Is fastened with

Then, the water introduced through the retaining wall 100 is moved toward the carbon-glass fiber composite structure 20 through the H-pile 100a and the bracket 10a (in FIG. 5a, the water path is indicated by an arrow). In order to block the above, the water stopper 12 is inserted into the upper portion of the bracket 10a on which the carbon-glass fiber composite structure 20 is supported.

Figure 5b is a view showing a state in which the waterproof index plate 12 is installed on the bracket (10a) in the present invention, a cross-sectional view taken along the line 'C-C' of FIG.

The waterproof index plate 12 is made of a rubber material as in the usual, and is inserted into the upper portion of the bracket (10a) to absorb the water and expand at the same time to block the path to the water inflow bar, earthen wall (100) ) Serves as a kind of barrier material to block water from entering the carbon-glass fiber composite structure 20 of the present invention.

On the other hand, the end of the carbon-glass fiber composite structure 20 is supported by the bracket 10 fixedly mounted on the CFT pillar 1 as described above, so that the carbon-glass can sufficiently withstand the concrete load to be poured The fiber composite structure 20 can be suspended by wires 3a and 3b on the upper or prefabricated upper beams 5 of the CFT column 1 or supported by a copper rod 6 installed on the lower side thereof. Referring to Figures 6a to 5c as follows.

First, FIG. 6A 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 to the upper portion of the CFT pillar 1.

In addition, Figure 6b is a case of the non-reinforced suspended suspension formwork is applied, the carbon-glass fiber composite structure 20 of the present invention by a plurality of suspension wires (3b), the upper end is fixed to the pre-constructed upper beam (5) ) Is a schematic diagram showing a supported state.

The lower ends of the suspending wires 3a and 3b are connected to the suspending holes 29a of the angles 29 installed in the carbon-glass fiber composite structure 20.

In addition, the lower ends of the suspending wires 3a and 3b may be connected to the bottom of the carbon-glass fiber composite structure 20, and at this time, the reinforcing iron plates (Fig. 4b is inserted inside or attached to both inner and outer surfaces, and the lower ends of the suspending wires 3a and 3b are connected to the reinforcing iron plate 22.

In order to support the lower carbon-glass fiber composite structure 20 on the upper beams 5 pre-constructed via the suspension wires 3b, the suspension wires 3b in advance before the concrete is poured on the upper beams 5. A connecting member 5a to which the upper ring can be connected is installed inside the carbon-glass fiber composite structure 20 of the upper beam, and the connecting member 5a is inserted into and fixed to the concrete of the upper beam 5.

The connecting member 5a passes through the lower portion of the carbon-fiberglass composite structure 20 through the through hole 20b for constructing the composite reinforced concrete beam 5 on the upper side, and the upper portion inside the structure 20 and the lower portion thereof. 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.

And, Figure 6c 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), after the excavation work from the lower side poured the discarded concrete (7), The clubs 6 are installed to support the structure 20.

On the other hand, Figure 7 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.

The intermediate beam construction FRP structure 30 is made of the same material as the structure 20 supported by the CFT column (1) described above having a reinforced concrete beam forming space Winding is produced in the form of a cross-sectional structure, it is arranged at right angles to the FRP structure 20 supported by the column to support by connecting and fixing both ends side by side between the two column support structure (20).

To this end, the carbon-glass fiber composite structure 20 supported by both CFT pillars 1 is manufactured in a state in which both side portions of the portion where the ends of the intermediate beam construction FRP structure 30 is connected at the time of manufacture are cut out 4D), the lower end portion of the column supporting structure 20 and the FRP structure for constructing the intermediate beam after inserting the end portions of the intermediate beam construction FRP structure 30 disposed at right angles through the cut portions. Tighten the bolts in a state where the lower end portions of 30) are joined to each other.

Of course, in order to prevent tearing of the structure after the fastening of the bolts, the reinforcing iron plates 23 and 31 are also inserted into the inner parts or attached to both inner and outer sides of the reinforcing iron plates. The parts where the (23, 31) is installed are fastened with bolts in the state of overlapping each other.

In addition, the intermediate beam construction FRP structure 30 installed as described above is also used as a permanent structure without undergoing disassembly, and although not shown in the drawing, the intermediate beam construction FRP structure is also present as the structure supported by the column. The receiving wire is used to support the preconstructed upper intermediate beam (see FIG. 6B).

Of course, like the structure 20 supported by the CFT column 1 described above, the intermediate beam construction FRP structure 30 also has an angle 32 for supporting the deck plate 8 along the upper sides of both sides The angle 32 is also provided with a suspension hole (not shown) in which the lower end of the suspension wire is connected.

In addition, reinforcing iron plates may be installed on the lower surface of the intermediate beam construction FRP structure 30 so that the lower end of the suspension wire fixed to the upper end to the pre-constructed upper middle beam can be connected (see FIG. 6B). The lower surface of the structure 30 is disposed at predetermined intervals to be inserted therein or attached to both inner and outer surfaces (see FIG. 4B).

And, similarly to the structure 20 supported by the CFT column 1, in order to support the lower intermediate beam construction FRP structure 30 to the upper intermediate beam with a hanging wire, the structure for the upper intermediate beam construction A connecting member to which the hook of the upper end of the suspension wire can be connected is installed, and the connecting member is installed so that the upper part is inside the structure and the lower part is below the structure through the lower part of the structure.

In FIG. 7, reference numeral 8 denotes a deck plate which is a formwork structure for slab construction, and as shown in the drawing, the deck plate 8 is simply installed on both beam construction FRP structures 20 and 30, and concrete When pouring, it is possible to install deck slabs.

The deck plate 8 is supported in such a manner that both ends span the intermediate beam construction FRP structure 30 and the beam construction FRP structure 20 supported by the CFT column 1, and thus the FRP structure. After installing the 20 and 30 and the deck plate 8, it is possible to construct beams and slabs by placing concrete at the same time or post-casting one of them.

9 is a schematic diagram showing an example of a connection state between the beam construction FRP structure and the deck plate according to the present invention, the deck plate 8 to the intermediate beam construction FRP structure 30 and the CFT column (1) It is shown that it is fixed and spanned between the beam construction FRP structures 20 supported by it.

The deck plate 8 is welded and fixed to the angles 29 and 32 with both ends mounted on the angles of the two beam construction FRP structures 20 and 30.

Thus, according to the composite reinforced concrete beam construction system using the FRP structure according to the present invention, the FRP structure itself acts as a reinforced concrete beam formwork and used as a permanent structure in the composite reinforced concrete beam structure without separate dismantling process In addition, it can be expected to reduce the amount of rebar used in the construction of reinforced concrete beams, formwork dismantling process can be eliminated, reducing the number of workers and working time.

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 the reinforced concrete beam winding carbon fiber FRP on the inside and 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.

8) Since the entire bracket is completely embedded in the SRC composite pillar together with the end of the carbon-glass fiber composite structure, the fastening means of the bracket and the structure, as well as the fastening means, that is, the bolts and nuts, are not exposed in appearance, and the appearance may be improved. Will be.

9) Since the carbon-glass fiber composite structure and the deck plate support angle are manufactured as a single unit, the deck plate can be directly installed using the angle after supporting the structure on the bracket in the field. Instead of having a separate deck plate, it is possible to work by simply welding the fixed deck plate is supported on a conventional angle that is widely used in general construction sites. In addition, there is no need to separately install a fastening structure or a fastening bracket on site in the general deck plate, and the overall installation work of the deck plate is simplified (simplification and efficiency improvement).

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,

4a and 4b are a perspective view and a plan view showing an embodiment of a carbon-glass fiber composite structure according to the present invention,

4c to 4e is a perspective view showing another embodiment of the carbon-glass fiber composite structure according to the present invention,

Figure 5a is a cross-sectional view showing a structure in which the end of the carbon-glass fiber composite structure in the present invention is connected and supported by the bracket of the retaining wall,

FIG. 5B is a cross sectional view taken along the line 'C-C' in FIG. 5A,

6a to 6c is a schematic view showing an example of a support state of the carbon-glass fiber composite structure according to the present invention,

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

Figure 8 is a connection state between the structure for the construction of the intermediate beam in the present invention and the column-supported carbon-glass fiber composite structure,

9 is a schematic diagram showing a connection state between the beam construction FRP structure and the deck plate according to the present invention.

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

1: Structural Column (CFT Column) 2: SRC Composite Column

10 bracket 20 carbon-glass fiber composite structure

20a: hole 21, 22, 23: reinforcing iron plate

29: angle 29a: suspension hole

30: composite structure for constructing intermediate beam

Claims (5)

In reinforced concrete beam construction system, A bracket installed on the steel pile of the retaining wall and the column for each frame in accordance with the height of the beam construction, and each bracket is installed in the concrete placing line to be completely embedded in the basement outer wall and the SRC composite pillar; Having a beam forming space using FRP as a material It is made of a cross-sectional structure, and is connected between the retaining wall and the frame pillar and between the adjacent frame pillars, the end of which is fixed and supported by the reinforcing steel plate to each bracket, and is installed inside the reinforcement and An FRP structure integrated with reinforced concrete beams after concrete pouring and curing to form a composite reinforced concrete beam; It is made, including, the FRP structure is a permanent structure, characterized in that each end including the fastening portion with the bracket is inserted into the concrete placing line so that it can be completely embedded into the basement outer wall and SRC composite pillars Composite reinforced concrete beam construction system using the used FRP structure. The method according to claim 1, The end portion embedded in the SRC composite pillar in the FRP structure is passed through the reinforcing bars connected up and down inside the SRC composite pillar, and formed as a hole used for placing the pillar concrete. Composite reinforced concrete beam construction system using structures. The method according to claim 1, The FRP structure is provided with an angle in the longitudinal direction along the upper end of both side portion is provided in the form of a single piece with this angle, the FRP is used as a permanent structure characterized in that the deck plate can be supported over the angle Composite reinforced concrete beam construction system using structures. The method according to claim 3, A composite reinforced concrete beam using the FRP structure used as a permanent structure, characterized in that a plurality of suspending holes formed through the side portion of the angle and the side portion of the FRP structure superimposed thereon are connected to the lower end of the suspending wire. Building system. The method according to claim 1, The FRP structure used as a permanent structure, characterized in that the waterproof index plate is inserted into the upper portion of the bracket installed in the steel pile of the retaining wall to block the water flowing through the retaining wall to move toward the FRP structure along the bracket Composite reinforced concrete beam construction system