KR20060060935A - Beam shear reinforcing apparatus using the prestressed fiber reinforced polymer - Google Patents

Abstract

The present invention includes a fixture installed on both sides of the structural beam, a tension member installed while wrapping both lower edges of the beam corresponding to the position of the fixture; And the other end is fixed after the tension is fixed to the tension sphere, or the tension between the tension spheres is fixed after being fixed to the fixture, and is installed in an unattached or attached state, the prestress in the height direction and the width direction to the beam It relates to a fiber beam reinforcement composite that can introduce;

FRP, shear reinforcement, fixing device, prestressed

Description

BEAM SHEAR REINFORCING APPARATUS USING THE PRESTRESSED FIBER REINFORCED POLYMER}

1A, 1B, 1C and 1D show examples of a shear reinforcing method and a fixing device of a conventional structural beam.

Figure 2a, Figure 2b and Figure 2c shows a structure beam shear reinforcement apparatus using a fiber reinforced composite introduced prestress corresponding to Example 1 of the present invention.

Figures 3a, 3b, 3c and 3d is a view showing a fixture of a structure beam shear reinforcement apparatus using a fiber reinforced composite introduced prestress corresponding to Example 1 of the present invention.

Figures 4a and 4b shows the L-shaped tension sphere of the structure beam shear reinforcement device using a fiber reinforced composite introduced prestress corresponding to Example 1 of the present invention.

5A and 5B illustrate a method of tensioning and anchoring an L-shaped tension sphere of a structure beam shear reinforcing device using a fiber reinforced composite having prestresses corresponding to Example 1 of the present invention.

6A and 6B illustrate an example of installation of a structure beam shear reinforcing apparatus using a fiber reinforced composite having prestresses corresponding to Example 1 of the present invention.

7A and 7B illustrate a structure beam shear reinforcing apparatus using a fiber reinforced composite having prestresses corresponding to Example 2 of the present invention.

8A and 8B illustrate a fixture of a structure beam shear reinforcing device using a fiber reinforced composite having prestresses corresponding to a second embodiment of the present invention.

8c and 8d show the inverted L-shaped tension sphere and installation state diagram of the structure beam shear reinforcement device using the fiber reinforced composite with prestress corresponding to the second embodiment of the present invention.

9A and 9B illustrate a structure beam shear reinforcing apparatus using a fiber reinforced composite having prestresses according to a third embodiment of the present invention.

10 is a state diagram showing the installation of the inverted L-shaped tension sphere of the structure beam shear reinforcement device using the fiber reinforced composite with prestress corresponding to the third embodiment of the present invention.

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

200,400,500: Structure beam shear reinforcement device

210,410,510: Fixture 220,420,520: L-shaped, inverted L-shaped

230,430,530: Fiber reinforced composite for side reinforcement

240,440: Fiber reinforced composite for lower surface reinforcement

The present invention relates to a structure beam shear reinforcement apparatus using a fiber reinforced composite introduced pre-stress. More specifically, the present invention relates to a shear reinforcing apparatus capable of introducing prestress into a structural beam by tensioning and fixing a factory produced FRP reinforcing material on the abdomen and lower surface of the structural beam for shear reinforcement of the structural beam.

In the 1990s, the structural reinforcement method using the new material FRP, which has the advantages of light weight, high strength, and non-corrosiveness, has been developed and put into practical use. Structure reinforcement method using this new material FRP is subdivided into fiber sheet type reinforcement method, fiber reinforcement plate reinforcement method, FRP Wire-Mesh type and FRP Rod (Bar) type reinforcement method according to the type of reinforcing material.

Shear reinforcement for the beam 10 of the conventional building in such a reinforcement method is being constructed in the form of wrapping the three sides of the fiber sheet 20 using an adhesive or the like due to the interference of the slab 11 as shown in Figure 1a, in this case Fiber sheet type reinforcing method that can be molded in the field is mainly used.

The shear reinforcement reinforcement method using the fiber sheet is limited in the length of attachment due to the geometric characteristics of bonding the fiber sheet to the web (abdominal) surface of the beam in the direction perpendicular to the member axis. It was common to not be able to secure enough adhesive strength.

1b and 1c introduce a shear reinforcement method (Patent 2002-20364) for a beam 10 of a building that can solve such a conventional problem in its own way.

That is, as shown in Figure 1b, a plurality of L-shaped carbon plate 30 is installed in the longitudinal direction on the side of the beam 10, L-shaped carbon plate 30 on the upper side of the beam by using a steel fixing fixture 40 formed with a shear key After fixing one end of the side, the other end is installed so as to overlap the bottom surface of the beam 10 in two layers as shown in Figure 1c so that the L-shaped carbon plate 30 wraps the side and the bottom surface of the beam, the surface of the beam The adhesive is applied between the L-shaped carbon plate 30.

Thus, two layers of L-shaped carbon plates 30 are overlapped on the lower surface of the beams in which the shear force of the beams is strongly generated, and the L-shaped carbon plates 30 are more reliably attached to the beams 10 by the steel fixing holes 40. It can be bonded to enable the shear reinforcement of the efficient beam.

At this time, the fixing of the L-shaped carbon plate 30 uses a steel anchoring hole 40 formed with a shear key as shown in FIG. In order to effectively fix the L-shaped carbon plate 20, the lower fixing hole 41 is formed with a c-shaped groove 42 as a shear key, and a protrusion 43 corresponding to the c-shaped groove 42 is attached to the upper fixing hole 44. By forming the L-shaped carbon plate 30 is inserted into the U-shaped groove 42, the L-shaped carbon plate 30 is bitten and fixed by the protrusion 43.

However, the following problems have been pointed out in the conventional reinforcement method as described above.

First, the shear reinforcement method by FRP attachment such as fiber sheet is reported to be ultimately destroyed by the cover concrete dropping at the side where the shear reinforcing bar is reinforced even when the adhesion force between concrete and FRP is sufficient. There is a limit range that the shear strength increases even if it increases

Second, the failure behavior of the beam is based on the strain (effective strain) when the fiber sheet (L-shaped carbon plate, etc.) is peeled and destroyed. The effective strain during shear reinforcement is the amount of reinforcement (fiber sheet It is reported to decrease in proportion to the thickness and stiffness), and if the amount of reinforcement (thickness) is increased to increase the reinforcing performance, the material economy decreases proportionally.

Third, in the case of steel anchoring, there is a problem in that it is not easy to manufacture because the separate steel sheet processing work is complicated to form a shear key, and even if possible, the economic efficiency in the manufacture of steel anchoring is low.

An object of the present invention is to provide a structure beam shear reinforcement apparatus using a pre-stressed fiber reinforcement composite that can sufficiently increase the shear resistance strength of the concrete member, such as beam (Beam) in reinforcing the concrete structure using the fiber sheet It is.

It is another object of the present invention to provide a structure beam shear reinforcement apparatus using a fiber reinforced composite in which prestress is introduced, which is more economical and has excellent workability and enables high quality structure reinforcement.

The present invention to achieve the above technical problem.

First, in the shear reinforcement of structural beams, fiber reinforced composites were used, but prestresses were introduced into the beams using fasteners and tension balls.

In particular, the introduction of the prestress is to be introduced to both sides and / or the bottom of the beam.

Second, the fiber reinforced composite was installed in the beam in a non-attached or attached form by using a fastener and a tensioner, and the breakage of the beam was minimized in the installation of the fastener and the tensioner while the prestress was easily installed.

Third, in the case of the fastener and the tension ball to adopt the pressure support method by the uneven portion to effectively fix and fix the fiber reinforcement composite to facilitate the manufacture and easy installation.

BRIEF DESCRIPTION OF DRAWINGS To describe the present invention more clearly and easily, the following describes the best embodiments of the present invention in detail with reference to the accompanying drawings, and embodiments according to the present invention may be modified in various other forms, and thus the scope of the present invention. Is not limited to the embodiment described below.

The structure beam shear reinforcing device 200 using the fiber reinforced composite in which the prestress of the present invention is introduced can be largely classified into a non-adhesive type (Example 1) and an adhesive type according to the installation method of the fiber reinforced composite. In this case, it can be divided into two examples (Example 2 and Example 3) according to the introduction of the widthwise prestress.

<Example 1>

Structure beam shear reinforcement apparatus 200 using a fiber reinforced composite having a prestress introduced according to the first embodiment of the present invention is

In the reinforcement of the structural beam 100, the fixture 210 is installed on both sides of the upper surface of the beam without being embedded in the beam concrete; An L-shaped tension tool 220 installed to cover both lower edges of the beam and not embedded in the beam concrete corresponding to the position of the fixture 210; And one side end is fixed to the fixture, and the other end is tensioned and fixed to the tension tool to introduce prestress in the height direction to the beam, but is spaced apart from the surface of the beam for side reinforcement installed in a non-attached state. Fiber reinforcement composite 230; is configured to include.

2A, 2B and 2C show an installation example of the structure beam shear reinforcing device 200 of the present invention.

In the case of Figure 2a, the fixture 210 is installed on both sides of the beam 100, the lower edge of the beam is provided with an L-shaped tension hole 220, both sides of the beam 100 for side reinforcement In the state where one end of the fiber reinforced composite 230 is fixed to the fixture 210, the other end is fixed to the L-shaped tension sphere 220 after being fixed.

In the case of FIG. 2B, the projecting shear key 211 is formed in the fixture 210 in order to increase the fixing ability of the fixture 210 in the structure beam shear reinforcing device 200 of FIG. 2A.

In the case of FIG. 2C, the reinforcing fiber reinforcing composite material 240 is fixed to the bottom surface of the beam 100 after being tensioned.

3A, 3B, 3C, and 3D show examples of the fixture 210 of the present invention and an installation state thereof.

3A and 3B, the lower fixture 1 212 of the fixture 210 is made larger than the upper fixture 1 213, and the lower fixture 1 212 is formed on the beam 100 as long as it is formed in the height direction. Is the case,

3C and 3D, the lower fixture 1 212 of the fixture 210 is also made larger than the upper fixture 1 213, and the lower fixture 1 212 is formed in the width direction as long as the beam 100. If installed on.

As a result, the fixture 210 of the present invention may be manufactured in various sizes and installation directions in consideration of the width and construction of the side of the beam.

The fastener 210 is projected by abutting the beam surface by the fixing means 214, as shown in Figure 3a to 3d, the lower fixture 1 (212) having a rough surface on the upper surface; and the fastening means 215 And an upper fixing tool 1 213 mounted on the lower fixing tool 212 by being coupled thereto.

The lower fixture 1 (212) is produced by processing a steel sheet so that the roughness portion (a) is formed in the central portion of the upper surface roughly. A hole 216 is formed around the uneven portion (a) so that the fixing means 214, such as the fixing bolt, can be installed therethrough. The hole 217 is further formed to be installed so as not to be embedded in the beam concrete using a fixing bolt on the upper side of the abdomen of the beam 100. In this case, the fixing bolt and the tightening bolt may use an anchor bolt having an integral head as shown in FIG. 3B, but may be installed by separating the nut and the bolt body as shown in FIG. 3A.

This has the advantage of not having to crush the beam concrete surface in order to install the fixture 210.

The upper fixture 1 (213) is processed to produce a steel plate so as to be installed in contact with the concave-convex portion (a) with a smaller height than the lower fixture 1 (212), but to form a concave-convex portion (a) in the central portion of the lower surface roughly Can be. In addition, a hole 218 is also formed so that the fastening means 215, such as a fastening bolt, can penetrate and engage the lower fixture 1 212.

As a result, when the upper fixture 1 (213) is coupled to the lower fixture 1 (212) fixed to the beam by the fixing bolt by the fastening bolt, the uneven portion between the lower fixture 1 (212) and the upper fixture 1 (213) (a The side reinforcing fiber reinforcement composite 230 to be described later) can be fixed to the acupressure so that the fixture 210 can act as a fixed end of the fiber reinforcement composite 230 in the future tension.

In the manufacturing of the fastener of the present invention, there is no need to separately form the grooves and protrusions as in the prior art, the production is easy, and the advantage that the bite portion of the fiber reinforcement composite 230 is not fixed, so that no damage occurs have.

The side reinforcing fiber reinforcement composite 230 installed as described above is spaced apart from the surface of the beam by at least the thickness of the lower fixture 1 (211). In the present invention, the non-attached method is installed in such a spaced position.

Even in this non-attachment method, since the fiber reinforcement composite 230 may be installed on the beam by the fixture 210 and the tension tool 220, the fiber reinforcement composite 230 is attached to the beam as in the conventional method. No adhesive is needed to do this.

In order to increase the fixing strength of the fixture 210, the lower surface of the lower fixture 1 (212) is further provided with a protruding shear key 211, the protruding shear key 211 may be embedded in the beam concrete.

Thus, the fixing strength of the fastener 210 may increase the shearing resistance of the fixing means including the fixing bolt, in addition to the adhesive strength and the protruding shear key of the adhesive when attaching the fastener with the adhesive.

The means for fixing the side reinforcing fiber reinforcement composite 230, one side of which is fixed to the fixture 210, after tension is the L-shaped tension tool 220.

4A and 4B are diagrams illustrating the L-shaped tensioning tool 220 and its installation state. The tensioning tool protrudes and is fixed to the lower side of the beam by the fixing means 214 (not shown) as shown in FIG. 3A. Lower tension tool 1 (221) in which the uneven portion (a) is formed; And a side tension tool 220a comprising: an upper tension tool 1 222 mounted on and coupled to the lower fixing hole 1 221 by a fastening means 215; And

A lower fixing tool 2 223 which protrudes and is fixed in contact with the lower surface of the beam continuously in the width direction with the side tension tool 220a and has a rough uneven portion (a) formed on the upper surface thereof; And a lower fixture 220b including; and an upper fixture 2 (224) mounted on and coupled to the lower fixture 2 (223) by the fastening means (215).

The coupling form of the side tension tool 220a and the lower surface tension tool 220b is formed in an L-shape as a whole and is manufactured by being integrally or separately coupled.

The L-shaped tension tool 220 is also installed to surround the lower edge of the beam so as not to be embedded in the beam concrete, like the fixture 210, the side tension tool (220a) is to tension the fiber reinforced composite 230 for side reinforcement If it is to serve as a tension fixture for fixing, the lower surface fixture (220b) is to act as a fixture for fixing after tensioning the fiber reinforcement composite 240 for the lower surface reinforcement. Since the division is related to the installation of the fiber reinforcement composite, the side tension tool and the lower surface fixing tool may be manufactured as an L-shape as one body, or may be separately manufactured and combined according to their function, but it is preferable to form one body.

The lower tensile tool 1 (221) and the lower fixture 2 (223) is also manufactured by processing the steel sheet, but the upper surface roughly the central portion so that the uneven portion (a) is formed. In the case of the lower tensile tool 1 221, as shown in FIG. 4A, a hole 225 is formed around the uneven portion a so that the fixing means 214 (not shown) including the fixing bolt can be installed therethrough. A hole 226 is further formed to allow the fastening means 215 including the fastening bolts of the upper tension tool 1 222 and the upper fixture 2 224 to be described later to pass therethrough.

An L-shaped tensioning member 220 is installed in the beam concrete using the fixing bolt 214 (not shown) on the lower side of the abdomen of the beam 100. This has the advantage of not having to crush the beam concrete surface in order to install the tension sphere 220.

Also, the upper tugguang 1 (222) and the upper fixture 2 (224) is formed in the lower tugguang 1 (222) and lower fixture 2 (224) to a size smaller than the lower tugguang 1 (221) and lower fixture 2 (223). The steel sheet is also processed to be manufactured so as to be in contact with the uneven portion (a), but the uneven portion (a) may be further formed in the central portion of the lower surface. In addition, a hole (not shown) is also formed so that the fastening means 215 such as the fastening bolt can penetrate and be coupled to the lower tension tool 1 221 and the lower fixture 2 223.

Accordingly, the side reinforcing fiber reinforcement composite 230 is fixed to the side tension tool 220a after tension, and fixed to one side of the bottom reinforcing fiber reinforcement composite 240 to the bottom fixing fixture 220b and the other installed at the opposite corner. In the case of fixing the other end to the lower surface fixture after tension, the side reinforcing fiber reinforcement composite 230 and the bottom reinforcing fiber reinforcement composite 240 can introduce prestress to the side and bottom of the beam 100.

The thickness of the lower tugguang 1 (221) and the lower fixture 2 (223) is formed to be the same as the thickness of the lower fixture 1 (212) so that the fiber reinforcement composite (230, 240) at least the side of the beam by the thickness of the lower fixture 1 (212) And spaced apart from the bottom surface so as to be installed in an unattached manner.

Due to such tension and settlement, prestress is introduced into the beam 100 not only in the height direction but also in the width direction without an additional process such as adhesive application, so that the effect of shear shear reinforcement of the beam is greatly generated. The resistance effect can be secured as far as possible.

5A and 5B illustrate a tensioning method of the fiber reinforced composites 230 and 240.

In the case of the side reinforcing fiber reinforcement composite 230, the other end of the fiber reinforcement composite 230, one end of which is fixed to the fastener 210 in a non-adhesive manner, using the jacking means 300 in the height direction, ie, in the vertical direction. After the tension is tightened to tighten the bolts of the upper tension 1 (222),

In the case of the fiber reinforced composite 240 for the lower surface reinforcement, the other end of the fiber reinforced composite 240 fixed to the lower surface fixing fixture 220b with one side end in a non-attached manner is also horizontal in the width direction, that is, using the jacking means 300. After the tension in the direction, the fastening bolts of the other upper fixture 2 (224) is tightened to settle.

6A and 6B illustrate a state in which a beam beam is provided with a structure beam shear reinforcing apparatus 200 using a fiber reinforcement composite in which the prestress of the present invention is introduced into the beam 100.

That is, as shown in FIG. 6a, the lower fixture 1 112 of the fixture 210 and the lower tension fixture 1 221 of the tension fixture 220 are continuously installed in the longitudinal direction of the beam 100, and the upper fixture 1 ( 213 and a plurality of upper tension device 1 (222) is spaced apart in the longitudinal direction of the beam, the side reinforcing fiber reinforcement composite 230 may also be installed in the longitudinal direction of the beam, that is, a plurality of longitudinal direction,

As shown in FIG. 6B, the lower fixture 1 212 of the fixture 210 and the lower tension fixture 1 221 of the tensioner 220 are spaced apart from each other in the longitudinal direction of the beam 100 so as to be inclined approximately 45 degrees. ), The upper fixture 1 (213) and the upper pulley 1 (222) is also installed in a plurality of spaced apart in the longitudinal direction of the beam, but a plurality of side reinforcing fiber reinforcement composite 230 in the longitudinal direction of approximately 45 degrees can be installed in the longitudinal direction. have.

At this time, the lower surface reinforcing fiber reinforcement composite 240 is not shown spaced apart from the lower surface of the beam is installed a plurality.

<Example 2>

7A and 7B illustrate a structure beam shear reinforcing device 400 using a fiber reinforced composite having prestresses corresponding to a second embodiment of the present invention.

In the case of FIG. 7A, fasteners 410 are buried in upper portions of both sides of the beam 100, and L-shaped tension spheres 420 are also buried in the lower edges of the beams, and the amount of the beams 100 is increased. On the side, one end of the side reinforcing fiber reinforcement composite 430 is fixed in the state in which the other end is fixed after the tension in the L-shaped tension sphere 420 is installed in close contact with the beam.

In the case of FIG. 7B, in the structure beam shear reinforcing device 200 of FIG. 7A, the reinforcing fiber reinforcing composite body 440 is installed on the lower surface of the beam 100.

The structure beam shear reinforcement device 400 using the fiber reinforced composite in which the prestress is introduced is a fixture 410 is embedded in the beam concrete on the upper surface of both sides of the beam; a corner of the beam corresponding to the position of the fixture 410 L-shaped tension sphere 420 is installed embedded in the beam concrete on the lower side of the beam wrapping; And one side end is fixed to the fixture 410 in the state in which the other end is fixed after being tensioned by the tension tool 420 to introduce a height prestress into the beam, and is installed in contact with the side of the beam in contact with the surface of the beam. It includes; the side reinforcing fiber reinforcement composite (430).

8A and 8B illustrate the fixture 410 and an installation state thereof.

The fastener 410 is buried in the beam surface by the fixing means 214 is fixed so that the upper surface is exposed and the lower fixture 3 (412) having a rough uneven portion (a) formed on the upper surface; And an upper fixing tool 3 413 mounted on and coupled to the lower fixing tool 3 412 by the fastening means 215.

The lower fixture 3 (412) is produced by processing the steel sheet so that the roughness (a) is formed in the central portion of the upper surface roughly. A hole 417 is formed around the uneven portion (a) so that a high water purification stage 214 such as a fixing bolt can be installed therethrough, and the fastening means 215 of the upper fixture 3 to be described later can be installed therethrough. A hole 416 is further formed.

The difference from the first embodiment is that the abdomen upper side of the beam 100 is installed to be embedded in the beam concrete.

The upper fastener 3 (413) is also made smaller than the lower fixture 3 (412) by processing the steel plate to be installed in contact with the concave-convex portion (a), but the lower surface roughly the central portion to form a concave-convex portion (a) Can be. In addition, a hole 418 is also formed so that the fastening means 215, such as a fastening bolt, can penetrate and engage the lower fixture 3 412.

As a result, the upper fixing tool 3 413 is coupled to the lower fixing tool 3 412 fixed to the beam by fixing bolts, and the fiber-reinforced composite 430 for side reinforcement described later is inserted into the uneven part a. And, it is installed, the fiber reinforced composite 430 is seized by the concave-convex portion (a) can be fixed acupressure so that the fixture 410 can act as a fixed end of the fiber reinforced composite 430 at a later tension. .

The side reinforcing fiber reinforcement composite 430 installed as described above is installed on the exposed surface of the lower fixture 3 (412) is installed on the side of the beam and is installed in this position is called the attachment method in the present invention. In this case, the adhesive may need to be applied in advance in order to attach the side reinforcing fiber reinforcement composite 430 to the beam as in the conventional method, but the side reinforcing fiber reinforcement composite 430 is fixed. 410 and the tension ball 420 is in close contact with the beam by the tension does not require a separate finishing process.

The means for fixing the side reinforcing fiber reinforced composite 430 having one side end fixed to the fixture 410 after tension is the L-shaped tension tool 420.

8C and 8D are diagrams illustrating an installation state of the L-shaped tensioning tool 420, which is embedded in the beam surface by the fixing means 214 and fixed to expose the upper surface thereof, and has a rough uneven portion a formed on the upper surface thereof. Tension sphere 2 421; And a top tension tool 2 (422) mounted on and coupled to the bottom tension tool 2 by the fastening means 215; And a lower fixing tool 4 (423) formed by contacting the lower surface of the beam continuously in the width direction with the side tension tool 420a and protruding from the lower surface of the beam or being embedded in the lower surface of the beam. ; And a lower fixture 420b including an upper fixture 4 424 mounted on and coupled to the lower fixture 4 423 by a fastening means 215, including, but not limited to, the side tension tool 420a and the lower fixture. The bonding form of 420b is formed by being integrally or separatedly coupled to the L-shape as a whole.

The L-shaped tensioning tool 420 is also embedded in the beam concrete, like the fixture 410 is installed to surround the lower edge of the beam, the side tension tool (420a) after tensioning the fiber reinforced composite 430 for side reinforcement The lower surface fixture 420b serves as a fixture for fixing the lower surface reinforcing fiber reinforced composite 440 after tensioning. The side tension tool 420a and the lower surface fixing tool 420b may be manufactured as an L-shape as a single body, or may be separately manufactured and combined according to their function.

Lower tugguanggu 3 (421) and lower fixture 4 (423) to be integrally installed in the L-shaped angle shape can be easily installed in the lower corner of the beam.

The lower tensile tool 3 (421) and the lower fixture 4 (423) is produced by processing the L-shaped steel sheet, but the upper surface roughly the central portion so that the uneven portion (a) is formed. Holes 425 are formed around the uneven portion a of the lower tension tool 3 421 to allow the fixing means 214 including the fixing bolt to penetrate therethrough, and the upper tension tool 3 422 and The hole 426 is further formed so that the fastening means 215 including the fastening bolt of the upper fixture 4 424 can be installed therethrough.

The tension sphere 420 is embedded in the beam concrete by using a fixing bolt on the lower abdomen side of the beam 100 is installed to be fixed.

The upper tug3 422 and the upper fixture 4 4 424 are smaller than the lower tuggu 3 (421) and the lower fixture 4 (423) to the unevenness formed in the lower tuggu 3 (421) and lower fixture 4 (423). The steel sheet is also processed to be manufactured so as to be in contact with the portion (a), but the uneven portion (a) may be further formed at the central portion of the lower surface. In addition, a hole is also formed so that the fastening means 215, such as a fastening bolt, can penetrate through and be coupled to the lower tension tool 3 421 and the lower fixture 4 423.

At this time, the exposure height of the lower tension device 3 (421) and the lower fixture 3 (412) is formed equal to the side reinforcing fiber reinforcement composite 430 is installed on the surface of the beam by an attachment method.

Particularly, in the case of the lower fixture 4 (423), the bottom reinforcing fiber reinforcement composite 440 may be installed in a non-attached manner so as not to be embedded in the beam bottom surface concrete, as shown in FIGS. 7A and 7B. The lower reinforcing fiber reinforcement composite 440 may also be installed in an attached manner.

As a result, the side reinforcing fiber reinforcement composite 430 and the bottom reinforcing fiber reinforcement composite 440 having one end fixed to the fixture 410 may be fixed after tension on the side and bottom of the beam 100.

Prestress is introduced into the beam not only in the height direction but also in the width direction due to such tension and settlement, so that the effect of shear shear reinforcement of the beam is greatly generated, so that the maximum resistance effect until the final failure is caused by dropping of the coated concrete. As the fixture 410 and the tension sphere 420 are embedded in the beam, it is possible to increase the anchoring ability of the fixture and the tension sphere due to the acupressure resistance to the concrete.

The state in which the beam beam reinforcement structure of the structure using the fiber reinforcement composite in which the tension method and the prestress of the fiber reinforcement composites 430 and 440 are introduced may be applied in the same manner as in Example 1.

<Example 3>

9A and 9B illustrate a structure beam shear reinforcing apparatus 500 corresponding to the third embodiment.

In the case of Figure 9a by installing an inverted L-shaped tension sphere 520 installed on the lower surface of the beam 100, the side reinforcing fiber reinforcement composite 530 is installed to be attached, so that the tension sphere 520 is not embedded in the beam If installed.

In the case of FIG. 9B, in the structure beam shear reinforcing device 200 of FIG. 9A, an inverted L-shaped tension hole 520 installed on the bottom surface of the beam 100 is installed, but the tension hole 520 is installed on the entire bottom surface of the beam. If it is.

Structure beam shear reinforcement apparatus 500 using a fiber reinforced composite in which prestress is introduced according to the third embodiment of the present invention includes a fixture 510 is installed to be embedded in the beam concrete on the upper surface of both sides of the beam; An inverted L-shaped tension tool 520 protruding from the lower surface of the beam so as not to be embedded in the beam concrete at the bottom of the beam corresponding to the position of the fastener; and the other end of the tension in the state where one end is fixed to the fastener 510. After the tension in the sphere 520 is introduced into the height direction prestress to the beam, but the side reinforcing fiber reinforced composite 530 is installed in contact with the surface of the beam and attached state; includes.

The fixture 510 is manufactured and installed in the same manner as in the second embodiment.

The means for fixing the side reinforcing fiber reinforced composite 530 having one side end fixed to the fixture 510 after tension is the inverted L-shaped tension tool 520.

The inverted L-shaped tension sphere 520 is the inverted L-shaped tension sphere as shown in FIG. 10, which is fixed without being embedded in the bottom surface of the beam by the fixing means 214, and a lower tensile tool 4 521 having a rough uneven portion formed on the side surface thereof. ); And an upper tension tool 4 522 mounted on the side surface of the lower tension tool 4 521 by the fastening means 215.

Unlike the fastener 510, the lower tensile tool 4 521 is installed in an inverted L shape on the lower surface of the beam without being embedded in the beam concrete, and serves as a fixing device for fixing the side reinforcing fiber reinforced composite 530 after tension. Done.

The lower tension tool 4 (521) uses an angle member, but the uneven portion (a) is formed at the central portion of the side surface. A hole is further formed around the uneven portion a so that the fastening means 215 including the long binding bolt of the upper tension tool 4 522 to be described later can be installed therethrough. Furthermore, a hole is formed in the portion attached to the lower surface of the beam so that the fixing means 214 including the fixing bolt can be installed therethrough.

The upper tensile tool 4 522 is processed to produce a steel sheet to be installed in contact with the concave-convex portion (a) formed in the lower tensile tool 4 (521) to a size smaller than the lower tensile tool 4 (521), but the lower surface roughly the central portion The uneven portion (a) can be further formed. In addition, a hole is also formed so that the fastening means 215 can penetrate and be coupled to the lower tug 4.

In particular, the lower tension tool 4 (521) can be formed integrally over the lower surface of the beam as shown in Figure 9b.

As a result, the side reinforcing fiber reinforced composite 530 having one end fixed to the fixture 510 is able to be fixed after being tensioned on the side of the beam 100.

This third embodiment can be employed to minimize breakage of the beam in the installation of fixtures and tensioning devices.

The state in which the beam beam reinforcement structure of the structure using the fiber reinforcement composite in which the tension method and prestress of the fiber reinforcement composite 530 is introduced may be applied in the same manner as in the second embodiment.

Due to the introduction of the prestress by the structure beam shear reinforcement device using the fiber reinforced composite with the prestress of the present invention, the shear resistance strength of the beam, which is a concrete member, is greatly increased. The material economy of fiber reinforced composites is about 3 ~ 4 times higher than that of the existing simple attachment method, which is dominated by peeling fracture, and high quality reinforcement work can be realized by realizing prestress reinforcement method based on high performance fixing device. In addition, when the non-attached prestress reinforcement method is applied, the surface processing process can be greatly reduced in the structure, so that the reinforcement work is possible even during the use of the building structure.

Claims (18)

In reinforcement of structural beams, Fasteners installed on both side upper surfaces of the beam without being embedded in the beam concrete; An L-shaped tension ball installed without being embedded in the beam concrete while surrounding both lower edges of the beam corresponding to the position of the fixture; And The one side end is fixed to the fixture and the other end is fixed after tension in the tension sphere to introduce the prestress in the height direction to the beam, but is spaced apart from the surface of the beam side-side reinforcement fiber installed in a non-attached state Reinforced composite; Structure beam shear reinforcement device using a fiber reinforced composite with a prestress, characterized in that it comprises a. 2. The structure beam shear reinforcement apparatus according to claim 1, wherein the fasteners and the tensioners are integrally installed in the longitudinal direction of the beam or spaced apart from each other. The fiber reinforced composite for prestressing according to claim 1 or 2, wherein the side reinforcing fiber reinforcement composites installed in an unattached state between the fastener and the tensioning device are installed vertically or inclined in the height direction. Structure beam shear reinforcement device using composite. The method of claim 1, wherein the fastener Fiber fixing for side reinforcement including; lower fixing sphere 1 protruding fixed to the surface of the beam by the fixing means fixed to the upper surface and having a rough uneven portion on the upper surface; and the upper fixing sphere 1 mounted on the lower fixing sphere 1 by a fastening means; A composite shear reinforcement structure by prestressed fiber reinforced composite, characterized in that the composite is seized by the concave-convex portion between the lower fixture 1 and the upper fixture 1. 5. The structure shear reinforcement apparatus according to claim 4, wherein the lower fixture 1 further includes a protruding shear key inserted into the beam concrete integrally. The structure shear reinforcement apparatus according to claim 4 or 5, wherein an uneven portion is further formed on an upper surface of the upper fastener 1 in correspondence with the uneven portion of the lower fastener 1. The method of claim 1 or 2, wherein the L-shaped tension sphere is A lower tension tool 1 which protrudes and is fixed to the lower surface of the beam by fixing means and has a rough uneven portion formed on the upper surface thereof; And a top tension tool 1 mounted on the bottom tension tool 1 by means of a fastening means; a side tension tool including; And A lower fixing tool 2 which protrudes and is fixed to the lower surface of the beam continuously in the width direction in the width direction and has a rough uneven portion formed on an upper surface thereof; And a lower surface fixture including an upper fixture 2 mounted on and coupled to the lower fixture 2 by a fastening means; wherein the coupling form of the side tension tool and the lower fixture is integrally formed or integrally separated into an L-shape as a whole. Structure beam shear reinforcing device using a fiber reinforced composite introduced prestress, characterized in that. The method of claim 7, wherein in the lower surface fixing sphere, While one end is fixed to the lower fixture 2 and the upper fixture 2, the other end is fixed to the other lower fixture 2 and the upper fixture 2 and then fixed so that the widthwise prestress is introduced into the beam, but is not attached to the lower surface of the beam The structure shear reinforcement device by the prestressed fiber reinforcement composite, characterized in that the bottom reinforcement fiber reinforcement composite is further installed in a state. In reinforcement of structural beams, Fasteners embedded in beams on both side upper surfaces of the beam; An L-shaped tension ball installed to be embedded in the beam on the lower side of the beam while surrounding the edge of the beam corresponding to the fixture position; And The one side end is fixed to the fixture and the other end is fixed after the tension in the L-shaped tension sphere to introduce the height direction prestress to the beam, but the side reinforcement fiber reinforcement side installed in contact with the side of the beam in contact with the surface of the beam Structural beam shear reinforcement apparatus using a fiber reinforced composite prestressed, characterized in that it comprises a composite; In reinforcement of structural beams, Fixtures are embedded in the beam concrete on both side upper surface of the beam; An inverted L-shaped tension tool protruding from the lower surface of the beam so as not to be embedded in the beam concrete on the lower surface of the beam corresponding to the position of the fixture; and The one side end is fixed to the fixture and the other end is fixed after the tension in the inverted L-shaped tension sphere to introduce the height direction prestress to the beam, the side reinforcing fiber installed in contact with the side of the beam in contact with the surface of the beam Reinforced composite; Structure beam shear reinforcement device using a fiber reinforced composite with a prestress, characterized in that it comprises a. [11] The structure beam shear reinforcement apparatus according to claim 9 or 10, wherein the fasteners and the tensioners are integrally installed continuously in the longitudinal direction of the beam or spaced apart from each other. . The prestressed fiber reinforced composite according to claim 9 or 10, wherein the side reinforcing fiber reinforced composite installed in an attached state between the fixture and the tension sphere is installed vertically or inclined in the height direction. Structure beam shear reinforcement device using. The method of claim 9 or 10, wherein the fastener is A lower fixing tool 3 embedded in the beam surface by fixing means to fix the upper surface thereof, and having a rough uneven portion formed on the upper surface thereof; And an upper fixing tool 3 mounted on the lower fixing tool 3 by means of fastening means, wherein the side reinforcing fiber reinforcing composite is seized by the uneven portion between the lower fixing tool 3 and the upper fixing tool 3 to be acupressure fixed. Shear reinforcement device by prestressed fiber reinforced composite. 14. The structure shear reinforcing device according to claim 13, wherein the uneven part is further formed on a contact surface of the upper stopper 3 corresponding to the uneven part of the lower stopper 3. The method of claim 9, wherein the L-shaped tension sphere A lower tension tool 2 embedded in the beam surface by the fixing means and fixed to expose the upper surface, and having a rough uneven portion formed on the upper surface thereof; And a top tension tool 2 mounted on the bottom tension tool 2 by means of a fastening means; And A lower fixing tool 4 which protrudes and is fixed to the lower surface of the beam continuously in the width direction with the side tension tool or is embedded in the lower surface of the beam to expose and fix the upper surface thereof, and has a rough uneven portion formed on the upper surface thereof; And a lower surface fixture including an upper fixture 4 coupled to and installed on the lower fixture 4 by means of a fastening means; wherein the coupling form of the side tension tool and the lower fixture is integrally formed or integrally separated into an L-shape as a whole. Structure beam shear reinforcement device using a fiber reinforced composite with a prestress, characterized in that the introduction. The method of claim 15, wherein the lower surface fixing sphere While one end is fixed to the lower fixture 4 and the upper fixture 4, the other end is fixed to the other lower fixture 4 and the upper fixture 4 after tension is set so that the widthwise prestress is introduced into the beam, spaced apart from the lower surface of the beam Prestressed fiber reinforced composite structure, characterized in that the reinforcing fiber reinforcement composite is further installed in the attached state or attached state. 11. The method of claim 10 wherein said inverted L-shaped sphere A lower tension tool 4 which is fixed to the bottom surface of the beam by a fixing means and is formed with a rough uneven portion on the side surface; And an inverted L-shaped tension ball, comprising: an upper tension tool 4 mounted on the side of the lower tension tool 4 by means of a fastening means; and a prestress fiber reinforcement introduced into the height direction. Structure shear reinforcement device by composite. 18. The structure shear reinforcing device according to claim 17, wherein the lower tension tool 4 is installed at each corner of the beam or is integrally formed continuously over the entire lower surface of the beam.

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