KR100648979B1 - FRP-Concrete Composite Structures Using the DoubleInner and Outer Hollow Typed Fiber Reinforced Polymer Pipe and the Construction Method Using the Same - Google Patents

Abstract

The present invention is to construct a concrete structure directly in the field by placing concrete inside the fiber-reinforced plastic segment in the form of a tube, in particular a fiber made of a double-sided structure to ensure sufficient connection performance in the connection of each segment The present invention relates to a concrete composite structure using reinforcement plastics and a construction method thereof, wherein an inner composite block made of fiber-reinforced plastic material filled with concrete and an outer block surrounding the inner composite block are installed on a support structure, and the inner composite block Adhesive is integrated between the outer blocks.

Fiber Reinforced Plastic, FRP, Segment, FRP Composite Column

Description

FRP-Concrete Composite Structures Using the Double (Inner and Outer) Hollow Typed Fiber Reinforced Polymer Pipe and the Construction Method Using the Same}

Figure 1 shows an example of a concrete composite structure using a conventional fiber-reinforced plastic.

Figure 2a shows a state in which the connection member is installed in the support structure of the present invention,

Figure 2b shows an inner fiber reinforced plastic segment constituting the inner synthetic block of the present invention,

Figure 2c shows a socket-type connection of the inner fiber reinforced plastic segment,

Figure 2d shows an outer block of the present invention,

Figure 2e shows a state in which the inner composite block of the present invention is installed in the support structure by interpolating the outer composite block.

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

100: support structure 110: connecting member (rebar)

120: support groove

200: internal synthetic block

200a, 200b, 200c, 200d: Internal synthetic block segment

210a, 210b, 210c, 210d: inner fiber reinforced plastic segment

220a, 220b, 220c, 220d: concrete

230: rebar

300: external block 400: adhesive

The present invention relates to a concrete composite structure using a fiber-reinforced plastic pipe made of a double-sided structure and its construction method. More specifically, the present invention relates to a method for constructing a concrete composite structure in which a concrete composite structure is constructed by a certain height by placing concrete inside a tubular fiber reinforced plastic segment.

According to the prior art for the structural member of the concrete composite using a fiber-reinforced plastic (or fiber-reinforced polymer) in connection with the present invention, according to Japanese Patent Application Laid-Open No. 2003-253761

As shown in FIG. 1, the fiber reinforced plastics such as FRP, GFRP, and CFRP are manufactured in the form of a tube 10, and installed as a column structure on the upper surface of the base plate 40, and the concrete 20 inside the fiber-reinforced plastic of the tubular shape. The fiber reinforced plastic concrete composite structural member which filled and reinforced the reinforcing bar 30 in the inside is introduced.

However, since the tubular fiber-reinforced plastics are manufactured with a considerably large height or length, there is a problem in that the material separation and tight compaction are not easy due to the problem of placing all at once when concrete is placed inside.

In addition, in the method of connecting a plurality of fiber-reinforced plastic construction, there is a need to develop related technologies including a more reliable connection treatment configuration in case of a defect in the connection part of each fiber-reinforced plastic pipe.

As to solve the problems of the prior art of the present invention,

It is an object of the present invention to provide a concrete composite structure using a fiber-reinforced plastic pipe which can secure the connection performance even when the fiber-reinforced plastic segments are connected to each other and a construction method thereof.

Another object of the present invention is to provide a concrete composite structure using a fiber-reinforced plastic tube of a segment made to a suitable height to facilitate quality control in filling concrete in the fiber-reinforced plastic segment and a construction method thereof.

Another object of the present invention is easy to manufacture in the field, significantly reduce the amount of rebar and do not require the formwork required in the existing construction economical and excellent construction, concrete composite structure using fiber reinforced plastic pipe with excellent durability and It is to provide the construction method.

The present invention to achieve the above technical problem

First, by adopting the method of fabricating and installing the tubular segment using fiber-reinforced plastic, it ensures the quality of concrete pouring and eliminates the need for formwork.

Second, concrete composites using fiber reinforced plastics were fabricated and installed in a double section structure. That is, the inside is first installed an inner synthetic block in which a plurality of inner fiber-reinforced plastic segments are connected to each other, and the outer block made of a tubular fiber-reinforced plastic and integrally manufactured without a connection part is installed to surround the inner synthetic block. After that, an adhesive including an epoxy resin was filled between the inner synthetic block and the outer block to integrate the two.

BEST MODE Hereinafter, the best embodiments of the present invention will be described in detail with reference to the accompanying drawings in order to describe the present invention more clearly and easily.

Concrete composite structure using the fiber-reinforced plastic of the present invention

In the concrete composite structure filled with the support structure 100,

Fill the concrete (220: 220a, 220b, 220c, 220d) inside the support structure 100 by connecting the inner fiber reinforced plastic segment (210: 210a, 210b, 210c, 210d) in the form of a hollow tube one by one By repeating the operation, a plurality of internal synthesis block segments (200a, 200b, 200c, 200d) is connected to each other the internal synthesis block 200 is installed;

A fiber-reinforced plastic block manufactured integrally without a connecting portion in the form of a hollow tube, the inner block having a diameter in which the interlocking block can be interpolated and fitted from an upper portion of the inner synthetic block 200 and installed around the inner synthetic block;

And an adhesive 400 including an epoxy resin filling between the outer surface of the inner synthetic block 200 and the inner surface of the outer block 300 to integrate the inner synthetic block and the outer block 300 with each other.

Construction method of the concrete composite structure using the fiber-reinforced plastics of the present invention

In constructing a concrete composite structure filled with concrete in the support structure 100, by connecting the internal fiber-reinforced plastic segment (210: 210a, 210b, 210c, 210d) of the hollow tube form to the support structure 100 by one step Repeating the operation of filling the concrete (220: 220a, 220b, 220c, 220d) therein while installing the internal synthesis block 200 (s1);

Installing a fiber-reinforced plastic outer block (300) in the form of a hollow tube having a diameter into which the inner synthetic block (200) can be inserted (s2); and

And a step (s3) of integrating the inner synthetic block 200 and the outer block 300 with each other.

Hereinafter, the concrete composite structure using the fiber-reinforced plastic of the present invention will be described together with the construction method.

Figure 2a is a front view showing a state in which the connection member 110 is installed on the support structure 100 of the present invention,

Figure 2b is a perspective view of the inner fiber reinforced plastic segment (200a, 200b, 200c, 200d) constituting the inner composite block 200 of the present invention,

Figure 2c is an enlarged view of the socket-type connection of the inner fiber reinforced plastic segment (210a, 210b),

Figure 2d is a perspective view of the outer synthetic block 300 of the present invention,

FIG. 2E illustrates a plan view and a front view of a state in which the inner composite block 200 of the present invention is inserted into the outer composite block 300 and installed on the support structure.

The support structure 100 may be manufactured as a concrete structure of various forms as shown in Figure 2a, in the present invention will be described based on the concrete base plate manufactured to support the lifting structure as a support structure from the bottom.

The concrete base plate has a predetermined height, the concrete is produced in the field using a formwork in the form of a cuboid. A plurality of reinforcing bars are not embedded therein, and the inner synthetic block 200 and the outer block 300 of the present invention described below are installed and supported in a double cross-sectional structure.

The upper portion of the concrete base plate is to be further provided with a connecting member 110 including a reinforcing bar and reinforcing bar assembly for structural connection with the internal composite block 200 to be described later. The connecting member serves to connect the support structure 100 and the inner composite block 200 to each other mechanically, and can be installed in a manner of protruding the reinforcement from the upper surface of the concrete base plate in advance when the concrete base plate construction, A separate reinforcing bar assembly may be installed to protrude to the upper surface of the supporting structure.

Furthermore, the support groove 120 may be formed in a cross-sectional shape (circular cross section or square cross section) of the outer block 300 on the upper surface so that the lower end of the outer block 300 to be described later may be fixed. The support groove 120 can be fixed to the end of the outer block 300 is inserted into the support groove 120 by an adhesive including an epoxy resin as shown in Figure 2e, the depth of the support groove, etc. This may be determined in consideration of the end insertion depth of the block.

As described below, in order to install the inner composite block 200, the inner composite block support part 130 protruding inside the support groove may be installed on the upper surface of the base plate in advance. This is to facilitate the initial installation of the inner composite block through the support, the support groove 120 inside the support material 131 in the form of a block made of the same material as the internal fiber-reinforced plastic segment first, and the concrete therein 132 may be pre-filled.

The inner synthetic block 200 is a plurality of hollow tube-shaped inner fiber reinforced plastic segments (210a, 210b, 210c, 210d) are installed in one step in order to connect up and down, and also one step in the concrete (220a, 220b, 220c) , 220d) is poured and cured to produce the final predetermined height (H).

Conventionally, after installing the fiber-reinforced plastic hollow tube having a final height as shown in Figure 1, the method is produced by pouring concrete from the inside of the hollow tube, this method is a concrete material at the time of pouring only 1.5M or more There was a problem that quality control is not easy due to separation phenomenon.

Accordingly, in the present invention, as shown in FIG. 2B, the fiber reinforced plastic segments 210a, 210b, 210c, and 210d in the form of hollow tubes having heights (h1, h2, h3, h4), which are easy to transport, install, and construct, are manufactured first. In addition to stacking the support structure 100 by one step, concrete (220a, 220b, 220c, 220d) was also installed in a step by placing the inner composite block 200 in a manner. At this time, the inner synthetic block portion filled with each concrete is referred to as the inner synthetic block segments (200a, 200b, 200c, 200d).

Each height (h1, h2, h3, h4) of the hollow fiber-shaped inner fiber-reinforced plastic segment is, for example, about 1.5M each (not necessarily the same height, it is possible to change a variety of heights). Preferably, the diameter is such that at least one worker can compact the concrete inside the segment.

The reason is that when the height of the segment is within 1.5M, it is possible to prevent material separation even if the concrete is poured from the upper part of the segment, and the quality of the required concrete must be enough to allow the worker to enter the inside of the segment and compact it. This is because management is possible.

At this time, each of the internal fiber reinforced plastic segment 210 is a body portion 211 manufactured using fiber reinforced plastic in the form of a hollow tube of a circular cross section or a square cross section as shown in Figure 2c; A connection end portion 212 protruding while a step is formed inward on an outer peripheral surface of the end portion of the body portion; And a connection end accommodating part 213 formed on the opposite side of the connection end and formed with a step on the inner side of the hollow so as to be caught while the other connection end is inserted.

The body portion 211 is manufactured in the form of a hollow tube as a cross-section such as circular using a fiber-reinforced plastic, that is, GFRP, CFRP, etc., is manufactured by strict quality control in the factory, and the concrete 220 is then poured into the inner hollow. Become cured.

The body portion 211 not only serves as a form of formwork, but also integrated with concrete, the body portion 211 and the concrete 220 are synthesized with each other to serve as a concrete composite, separately inside such as reinforcing steel or steel Even if a concrete reinforcement is not installed or with a small amount of rebar, sufficient cross-sectional force for external loads can be secured.

Furthermore, the concrete 220 filled therein by the body 211 is constrained. Due to the restraining effect of the body portion, the concrete 220 can resist a greater load, thereby increasing the resistance to the working load.

The connecting end 212 is formed to connect with the other inner fiber reinforced plastic segment in the form of a hollow tube, and is formed to protrude in the direction in which the segments are formed to connect the inner fiber reinforced plastic segments to each other by a kind of socket connection method. do.

That is, the step is formed to protrude while forming a step inward on the outer peripheral surface of the end of the body portion 211, wherein the size of the connection end portion 212 is also formed to the extent that can be inserted into the connection end receiving portion of the other fiber-reinforced plastic segment The length can be changed according to the size and installation height of the fiber reinforced plastic composite block.

The connection end accommodating part 213 is formed on the opposite side of the connection end 212, and is stepped outward from the hollow inner surface to a predetermined depth so that another connection end may be caught. That is, when the connecting end is inserted into the segment and connected to the point where the step is formed, it is caught at the step where the step is formed so that it is no longer inserted, whereby the segment and the segments are mechanically coupled to each other. In the present invention, the connection end 212 and the connection end receiving portion 213 is referred to as a socket type connection.

Further, it is also possible to connect the internal fiber-reinforced plastic segments to each other by a method other than such a socket type connection part, and the socket type connection part of the present invention is shown as an example and may be installed without any additional connection part. This is because the outer block 300 is installed while surrounding the inner composite block 200 as described below can sufficiently secure the connection portion performance.

Inside the concrete 220 filled in the inner composite block 200 is further provided with a flexible securing member 230 including a reinforcing bar or reinforcing bar assembly over the entire length (H) of the inner composite block as shown in FIG.

In fact, in the case of the internal composite block 200, due to the material characteristics of the fiber-reinforced plastic and its concrete restraint effect, general reinforcing bars (type of concrete reinforcement) used for reinforced concrete are not required for the concrete 220 of the internal composite block. Although there is an advantage, in the present invention, the flexible securing member 230 including reinforcing bars or reinforcing bars is installed to secure the ductility, not the function of the concrete reinforcement.

This is to solve the problem that the internal synthetic block 200 may show brittle fracture behavior with respect to the working load, and to ensure ductility during the delayed time until the reinforcing bars or reinforcing assemblies break while yielding to the working load. The principle is that it can. As a result, the curbstone securing member of the present invention can be distinguished from its installation purpose, installation amount and installation method as compared with the conventional reinforcement to be reinforced to the reinforced concrete even when using the same rebar.

The lower end of the flexible securing member 230 is preferably connected to the upper end and the lower part of the connecting member 120 reinforcement from the base plate as shown in Fig. 2e by overlapping each other, using a reinforcing bar such as a coupler It may be.

The internal synthetic block segments connected to each other as the socket type connection are necessarily formed with a connection, and this connection may be a factor that may affect structural safety in any way.

Therefore, in the present invention, in order not to impair the structural safety by such a connection portion, the entire inner synthetic block 200 is also wrapped with an outer block 300 of fiber reinforced plastic material, and the adhesive 400 including epoxy resin therebetween. After charging, the external block 300 is integrated with the connection part of the internal synthesis block 200, thereby structurally canceling the instability of the connection part.

The outer block 300 is manufactured in the form of a hollow tube as a cross-section, such as a circular shape using a fiber-reinforced plastic, ie GFRP, CFRP, etc., as shown in FIG. There is a technical feature of being made of fiber-reinforced plastic in the form of a hollow tube integrally produced as a height corresponding to the height of the inner synthetic block 200.

If the size is based on a circular cross section, the inner synthetic block is made to the minimum diameter that can be fitted to minimize the amount of adhesive filling.

As a result, the outer block 300 is installed to surround the inner synthetic block 200. For example, the inner composite block 200 is interpolated into the hollow interior of the outer block 300, that is, the outer block 300 is lifted by a lifting device such as a crane, and then the outer block 300 from the upper portion of the inner composite block 200. ) Can be fitted.

The main function of the outer block 300 is to ensure the structural safety of the connecting portion, such as the socket-type connection of the inner composite block 200, and is not simply a member synthesized with concrete, so it is simply referred to as a block of fiber reinforced plastic material. .

At this time, the lower end of the outer block 300 may be inserted into the support groove 120 formed on the upper surface of the concrete base plate 100, as shown in Figure 2e so that its position does not change after installation. Accordingly, the position of the support groove may be somewhat wider in consideration of the installation position of the external block, and the construction of the external block may be improved by applying an adhesive including an epoxy resin in advance in the support groove.

As a result, the outer block 300 and the inner composite block 200 are installed in a double cross-sectional structure. Since the external block is simply positioned around the inner synthetic block only by such a cross-sectional structure, there is a problem in that the external block cannot be integrally resisted against the working load. The inner surface of the fiber reinforced plastic outer block is filled with an adhesive 400 including an epoxy resin as shown in FIG. 2e to integrate the inner synthetic block and the outer block.

By securing the integrity, the connection part of the inner synthetic block is integrated with the outer block as described above, and thus has the effect of structurally canceling the instability of the connection part.

In the construction form of the present invention, in the case of the support structure 100 to be manufactured on-site, the internal fiber-reinforced plastic segment constituting the inner composite block 200 is manufactured in the factory, but after transporting to the site, concrete pouring After the external block 300 is also manufactured in the factory, it may be a method that follows the installation method in the field, but is not necessarily limited to this, after both the internal composite block and the external block produced in the factory In the field, only the installation can be made.

In addition, an additional structure such as a coping part may be further installed on the upper portion of the inner synthetic block 200 and the outer block 300 installed as a double-sided structure, and such a structure may also be installed using a fiber-reinforced plastic segment. Finally, the bridge upper structure including the bridge deck such as slab is further installed.

The concrete composite structure and the construction method using the fiber-reinforced plastic pipe made of a double-sided structure of the present invention enables the construction of a structure with better connection performance and easy quality control.

By using the fiber-reinforced plastic and the combination of the restraining effect and the tension means of the concrete filling therein, more efficient cross-sectional design is possible, and because it is prefabricated, it is very easy to manufacture, transport and construct various forms or Applicable to the structure of the shape.

An embodiment of the present invention described above and illustrated in the drawings should not be construed as limiting the technical spirit of the present invention. The protection scope of the present invention is limited only by the matters described in the claims, and those skilled in the art can change and change the technical idea of the present invention in various forms. Therefore, such improvements and modifications fall within the protection scope of the present invention as long as it will be apparent to those skilled in the art.

Claims (15)

In the concrete composite structure filled with the support structure, An inner synthetic block having a plurality of inner synthetic block segments connected to each other by repeating a step of filling concrete therein while connecting the inner fiber reinforced plastic segment having a hollow tube shape to the support structure one by one; A fiber-reinforced plastic block manufactured integrally without a connecting portion in the form of a hollow tube, comprising: an outer block having a diameter to which an inner synthetic block can be interpolated and fitted from an upper portion of the inner synthetic block and installed around the inner synthetic block; And Filled between the outer surface of the inner synthetic block and the inner surface of the outer block adhesive including an epoxy resin to integrate the inner synthetic block and the outer block with each other; fiber reinforced plastic tube made of a double-sided structure comprising a Concrete composite structure used. According to claim 1, wherein the upper surface of the support structure for the initial installation of the inner composite block is further provided with an inner composite block support on the upper surface of the support structure, the support is a support portion installed in the support grooves made of the same material as the inner fiber-reinforced plastic segment And concrete composite structure using a fiber-reinforced plastic pipe made of a double-sided structure characterized in that it comprises a concrete formed inside the support. According to claim 1, wherein the interior of the concrete filled in the composite block is reinforced fiber reinforced plastics made of a double-sided structure characterized in that the flexible securing member including a reinforcing bar or reinforcing bar assembly is further installed over the entire length of the inner composite block; Concrete composite structure using pipe. The composite structure of claim 1, wherein the inner fiber reinforced plastic segment and the outer block are manufactured in the form of a fiber reinforced plastic hollow tube including a circular cross section. The method of claim 1, wherein the connection between the inner composite block and the support structure, The double-sided structure characterized in that the inner composite block and the support structure is structurally connected to each other by pre-installing a connecting member including a reinforcing bar and reinforcing bar assembly is installed from the support structure via the filled concrete of the inner composite block. Concrete composite structure using fabricated fiber reinforced plastic pipe. The method of claim 1, wherein the outer block and the support structure Forming a support groove in the support structure, the end of the fiber-reinforced plastic outer block is a double-sided structure comprising the outer block and the support structure is connected to each other by an adhesive comprising an epoxy resin in the support groove Concrete composite structure using fabricated fiber reinforced plastic pipe. In constructing a concrete composite structure filled with concrete in the support structure, the internal structure block is repeatedly installed by connecting the internal fiber-reinforced plastic segment in the form of a hollow tube to the support structure one by one and filling the concrete therein. Doing; Installing a fiber reinforced plastic outer block in the form of a hollow tube having a diameter in which the inner synthetic block can be inserted around the inner synthetic block; And Integrating the inner synthetic block and the outer block with each other; Concrete composite structure construction method using a fiber-reinforced plastic pipe made of a double-sided structure comprising a. The method of claim 7, wherein the installation of the inner composite block In the field, one stage of the internal fiber reinforced plastic segment in the form of a hollow tube is installed in the supporting structure, and the concrete is filled in the fiber reinforced plastic segment installed in the first stage. By connecting the new fiber reinforced plastic segment 1 stage to the fiber-reinforced plastic segment 1 stage filled with concrete, and then filling the concrete repeatedly, a plurality of internal synthetic block segments are installed by connecting each other. Construction method of concrete composite structure using fiber reinforced plastics installed. The method of claim 7, wherein the outer block is a hollow fiber reinforced plastic block made without a connecting portion, characterized in that the inner synthetic block is inserted from the top of the inner synthetic block so that the inner composite block is installed around the inner synthetic block Construction method of concrete composite structure using fiber reinforced plastic installed in double section structure 8. The fiber reinforced plastic according to claim 7, wherein the inner synthetic block and the outer block are integrated with each other by filling an adhesive including an epoxy resin between the outer surface of the inner synthetic block and the inner surface of the outer block. Concrete composite structure construction method. 8. The fiber reinforced plastic according to claim 7, wherein a flexible securing member including reinforcing bars or reinforcing bars is further installed inside the concrete filled in the inner synthetic block. Construction method of concrete composite structure using 8. The method according to claim 7, wherein the inner fiber reinforced plastic segment and the outer block are manufactured in the form of a fiber reinforced plastic hollow tube including a circular cross section. The method of claim 7, wherein the connection between the inner composite block and the support structure, The double-sided structure, characterized in that the inner composite block and the support structure is structurally connected to each other by pre-installing a connecting member including a reinforcing bar and reinforcing bar assembly is installed from the support structure via the filled concrete of the inner composite block Construction method of concrete composite structure using fiber reinforced plastics installed. The method of claim 7, wherein the outer block and the support structure A support groove is formed in the support structure, and the outer block and the support structure are connected to each other by an adhesive including an epoxy resin at the end of the outer block, and the coping portion and the slab are formed on the outer block and the inner synthetic block. Concrete composite structure construction method using a fiber-reinforced plastic installed in a double-sided structure, characterized in that the bridge upper structure further comprises a. According to claim 7, wherein the upper surface of the support structure for the initial installation of the inner composite block is further provided with an inner composite block support on the upper surface of the support structure, the support is a support portion installed in the support groove made of the same material as the inner fiber reinforced plastic segment And concrete composite structure construction method using a fiber-reinforced plastic installed in a double-sided structure characterized in that it comprises a concrete formed inside the support.

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