KR20040033238A - External prestressing strengthening structure using cfrp(carbon fiber reinfroced polymer) plates - Google Patents

Abstract

PURPOSE: An outer prestressing reinforcement method using a carbon plate is provided to improve the load carrying capacity of a bridge. CONSTITUTION: The outer prestressing reinforcement method using a carbon plate comprises: an upper plate(110) provided with an anchorage-laying groove to reinforce a bridge; a carbon plate(150) arranged on the lower part of the upper plate using epoxy adhesives to reinforce against the stress transferred from the upper plate, or attached using epoxy adhesives, and provided with a carbon plate support; a fixed anchorage fixing one side of the carbon plate support of the carbon plate(150), and provided with a fixed end body and a fastening projection and a fixed end fastener to be fixed to the upper plate(110) using a fastening bolt; a tension anchorage installed on the opposite part to the fixed anchorage to make the carbon plate(150) support the upper plate(110), provided with a horizontal plate and a vertical plate welded to vertical boards, many fastening bolt holes formed on the side of the vertical board and a fastening bolt hole formed on one side of the horizontal plate fixed perpendicular to the vertical board to be fixed with the upper plate using a fastening bolt, and fixed by tensioning the other side of the carbon plate support of the carbon plate(150); and a curve anchorage installed on the curved part of the carbon plate to make shear reinforcement and bending reinforcement possible, and provided with an upper projection formed in the middle of a curved board and an spacer formed on the upper corner of the curved board, and fixed with the upper plate(110) using a fastening bolt through a fastening bolt hole of the spacer.

Description

EXTERNAL PRESTRESSING STRENGTHENING STRUCTURE USING CFRP (CARBON FIBER REINFROCED POLYMER) PLATES}

The present invention relates to the reinforcement method of the aging and damaged bridges, in particular to improve the problems of the external tensile method using the current steel wire (or steel bar), and also by using the advantages of the carbon plate prestressing from the outside of the bridge The present invention relates to a method for improving load capacity, and also a method for reinforcing a bridge at the same time as shear reinforcement of bridge haunches by adding a curved fixing device.

For the following reasons, reinforcement work is carried out for existing structures, and the reinforcement of bridges and buildings for the purpose of reducing the load capacity due to the aging of the structure and when the load capacity is a problem due to design or construction errors is required. do.

The load capacity of all the constructed structures decreases with time, and the damage of the structures such as bridges frequently occurs due to the operation of large vehicles and overload vehicles, and the load-bearing capacity decreases, so that the performance of bridges can be restored. In the past, top plate reconstruction, steel plate reinforcement method and prestressing method using an external steel wire (or steel bar) have been used.

The prestressing reinforcement method using the external steel wire (or steel bar) among the above methods is a very economical and efficient reinforcement method and can be reinforced on almost all bridges such as PSC beam bridge, T beam bridge, box bridge, slab bridge, etc. Steel bar) The disadvantage of reinforcement method is that it requires a large number of anchor bolts because it receives tension force acting on anchorage only by anchor bolt, and the anchorage is large and heavy, complicated in shape and unsightly in appearance. Has

In particular, in the reinforcement method using the external steel wire (or steel bar), stress concentration is often generated at the edges of the ends, so that cracks are likely to occur, and the installation work of the anchor bolt is not easy, and corrosion of the steel wire (or steel bar) is difficult. Since heavy steels (steel rods) that are likely to occur and use heavy weights have the disadvantage of burdening a lot of additional load on the structure and the disadvantage of damaging the main members of the structure during installation work.

The present invention, in order to solve the above problems, the present invention is to develop a variety of new means to facilitate the reinforcement of the beams and slabs of the aging bridge, and easy installation and installation, while also having an excellent reinforcement structure The purpose of the present invention is to provide an external prestressing reinforcement method using a carbon plate.

1A is a view schematically illustrating an external prestressing reinforcement method using a carbon plate of the present invention, FIG. 1B is a view showing a carbon plate stuck to an A part, and FIG. 1C is a view showing an external prestressing reinforcement method using a carbon plate of the present invention. 1D is a cross-sectional view of the portion BB of FIG. 1C.

Figure 2 is a view of a fixing anchor used in the reinforcing method according to the present invention, (a) is a perspective view of the fixing anchor, (b) is a plan view showing the coupling state of the coupling members of the fixing anchor, (c) is a fixed anchor The figure which shows the state fixed to the upper board, (d) is a perspective view which shows the coupling structure of a fixing anchorage.

Figure 3 is a view of the tensile anchorage used in the reinforcing method according to the present invention, (a) is a perspective view of the tensile anchorage, (b) is a plan view showing the coupling state of the coupling members of the tensile anchorage, (c) is a A perspective view showing the engagement state of the engagement members.

Figure 4 is a view of the curved portion fixing device used in the reinforcement method according to the present invention, (a) is a perspective view of the curved portion fixing device, (b) is a plan view of the curved portion fixing device, (c) is a curved portion fixing device The figure which shows the state joined to a virtual plate.

<Description of Symbols for Main Parts of Drawings>

100: bridge 110: tops

120: pier 150: carbon plate

160: carbon plate support 200: fixed anchor

210: fixed end body 220: fastening protrusion

222,232,252,318,332,416: Fastening bolt hole 226: Cutting rounding part

230: fixed end fastening portion 250: fastening plate

260,360,460: Fastening bolt 270: Carbon plate mounting hole

272,346: slit groove 300: tensile anchorage

310: vertical plate 312: horizontal plate

314: vertical plate 320: cylinder buried portion

330: carbon plate support plate 334: central protrusion

340: carbon plate fixing plate 342: bolt hole

344,352: bolt through hole 350: bolt fixing plate

370: bolt 372: threaded portion

400: curved fixing unit 410: bent plate

412: upper protrusion 414: spacer

420: vertical section

The present invention, in order to achieve the above object, the present invention, in the reinforcement method for a structure using a carbon plate, the upper plate; Carbon plate; Fixed anchorages; Tensile anchorages; It provides a reinforcement method of the bridge using a carbon plate consisting of; and a curved fixing unit.

Hereinafter, a configuration and an operating state will be described with reference to the accompanying drawings.

FIG. 1A is a view schematically illustrating an external prestressing reinforcement method using a carbon plate of the present invention. A plurality of piers 120 are installed directly on the upper plate 110 of the bridge 100 to support the upper plate 110. In this case, the upper plate 110 may be divided into a branch portion vulnerable to shear and a central portion vulnerable to bending, and the vulnerability is reinforced as shown in the drawing (Part A) through the shear reinforcement of the branch portion and the bending portion of the center portion.

The steel of the reinforcing member is made of a rolled steel for welding structure, and the zinc plated to prevent corrosion due to its excellent material due to fixing the carbon plate 150 at various positions in the longitudinal direction to reinforce the upper plate 110. The upper plate 110 is provided with a plurality of reinforcing members in the width direction of the upper plate to support the upper plate 110 from the bottom.

In FIG. 1B, the carbon plate is fixed to the A portion. The carbon plate 150 is formed in a rectangular cross section, while the carbon plate 150 is formed on both sides of the carbon plate 150.

FIG. 1C is a view showing an external prestressing reinforcement method using a carbon plate of the present invention, and FIG. 1D is a view showing a cross section taken along the line B-B of FIG. 1C.

The upper plate 110 is provided with a plurality of rows of reinforcing structures in which the carbon plate 150, the fixed fixing unit 200, the tension fixing unit 300, and the curved fixing unit 400 are integrally coupled to the upper plate 110.

Figure 2 is a view of a fixing anchor used in the reinforcing method according to the present invention, (a) is a perspective view of the fixing anchor, (b) is a plan view showing the coupling state of the coupling members of the fixing anchor, (c) is a fixed anchor The figure which shows the state fixed to the upper board, (d) is a perspective view which shows the coupling structure of a fixing anchorage.

As can be seen in Figure 2a, the fixing anchorage 200 shows a difference in the shape of the upper and lower parts (separated into upper and lower parts based on the drawing) to have a cylindrical cross section, cutting the upper portion of the cylindrical body The upper portion is formed in a structure having a step, and the lower portion of the cylindrical body is formed in a cylindrical body cross section so as to be embedded in the buried groove of the upper plate.

That is, the fixing anchorage 200, the portion embedded in the upper plate is cut so that the fixed end body 210 is formed in a cylindrical cross section, the fastening protrusion 220 is projected on the upper end of the fixed end body 210. It is formed to face each other at 180 ° angle, the fixed end fastening portion 230 is formed to be perpendicular to the adjacent position where the fastening protrusion 220 is formed.

As it can be seen in Figure 2b and 2d, the fastening plate 200, the fastening plate 250, the carbon plate mounting hole 270, the carbon plate 150 is coupled to the fastening structure is formed integrally, the fixed fixing unit 200 The fastening plate 250 is fastened to the upper portion 200 by a fastening bolt, and the carbon plate 150 passing through the lower portion of the fastening plate 250 penetrates the slit groove of the carbon plate mounting hole 270 to allow the carbon plate mounting hole 270. ) Is in close contact with one side of the fastening protrusion 220 and the carbon plate support portion 160 of the carbon plate 150 is fixed to be in close contact with one side of the carbon plate mounting hole 270.

As can be seen in the above description, the fixing anchorage 200 is a fastening plate 250 is coupled to the fastening bolt hole 222 formed in the fastening protrusion 220 by the fastening bolt 260, the fastening of the Plate 250 is a rectangular plate is formed with fastening bolt holes 252 on both sides in the longitudinal direction.

The fixing fixture 200, the carbon plate mounting hole 270 is in close contact with one side of the fastening protrusion 220, the carbon plate mounting hole 270 is slit so that the carbon plate 150 can be inserted from one side to the inside. While the groove 272 is formed long, the carbon plate mounting hole 270 is horizontally formed at one side and rounded at the other side.

Referring to the state in which the carbon plate 150, the fastening plate 250 and the carbon plate mounting hole 270 is fastened to the fixed anchorage 200 as follows.

First, before fastening the fastening plate 250 to the upper surface of the fastening protrusion 220 of the fixing anchorage 200 with the fastening bolt 260, the carbon plate (272) in the slit groove 272 of the carbon plate mounting hole 270 150 to insert the carbon plate support portion 160 is in close contact with the carbon plate mounting hole 270 and then formed so that the carbon plate 150 is positioned between the fastening protrusion 220, the fastening plate 250 is fastened The fastening bolt 260 is fastened to the upper portion of the protrusion 220.

That is, when the fastening plate 250 is fastened to the fastening protrusion 220 by the fastening bolt 260, the cutting rounding part 226 and the fastening plate 250 formed on the upper part of the fixing anchorage 200 are fastened. A groove is formed therebetween, and the carbon plate mounting hole 270 is positioned in a state in which the carbon plate 150 is inserted into the rear side of the groove to fix one side of the carbon plate 150.

At this time, when the fixing anchorage 200 is embedded in the upper plate, the fixing end body 210 is inserted into and fixed in the buried groove previously formed in the upper plate, and at the same time, the fastening bolt 260 is fastened to the fixing end fastening part 230. It is fixed to the top plate.

As can be seen in Figure 2c, in the fixed anchorage 200 is embedded in the upper plate 110, the fastening plate 250 is fastened to the fastening protrusion 220 by the fastening bolt 260, the fastening The fixed end fastening part 230 is formed to be fixed to the upper plate with a structure perpendicular to the outer circumferential surface of the protrusion 220, and the fixed end body 210 when the fixed fixing unit 200 is embedded in the upper plate. ) Is inserted into the buried groove formed in the upper plate and fixed at the same time, the fastening bolt 260 is fastened to the fixed end fastening portion 230 is fixed to the upper plate in a double.

Figure 3 is a view of the tensile anchorage used in the reinforcing method according to the present invention, (a) is a perspective view of the tensile anchorage, (b) is a plan view showing the coupling state of the coupling members of the tensile anchorage, (c) is a It is a perspective view which shows the engagement state of coupling members.

As can be seen in Figure 3a, the tensile anchorage 300, a vertical plate 310 having different heights on both sides of the length is formed in a state facing each other to have a gap on both sides, the vertical plate 310 is one side Is formed horizontally and inclined at the other side, and the horizontal plate 312 is welded to the side on which the height of the vertical plate 310 is formed high, and the vertical plate (dotted line) is perpendicular to one side where the horizontal plate 312 is formed. 314) is a welded structure.

The tension anchorage 300 has a fastening bolt hole 318 formed on a side surface of the vertical plate 310 having a low height spaced apart from both sides, and a cylindrical embedding portion having a cylindrical cross section behind the horizontal plate 312. 320 is formed.

The tension anchor 300 is a cylindrical buried portion 320 is inserted into the upper plate and the fastening bolt is fastened to the fastening bolt hole of the horizontal plate 312 is fixed so that there is no flow in the upper plate.

As can be seen in Figure 3b and Figure 3c, the tension fixing unit 300 is coupled to the other side of the carbon plate support 160 of the carbon plate 150, while the structure can be tensioned by the bolt 370, The tension fixing unit 300 is coupled to the carbon plate support plate 330, the carbon plate fixing plate 340 and the bolt fixing plate 350.

The coupling state of the tensile anchorage 300 is as follows.

The carbon plate supporting plate 330 is fastened by the fastening bolts 360 to the vertical plate 310 positioned in the tension fixing unit 300 in which the fixing fixing unit 300 is installed, and the vertical plate 314 is attached to the tensile fixing unit 300. The carbon plate fixing plate 340 and the bolt fixing plate 350 are fastened to one side and the other side of the length of the bolt 370 penetrating, respectively, and the carbon plate 150 is inserted into the slit groove 346 of the carbon plate fixing plate 340. The other side of the carbon plate support 160 is fixed in the state and the bolt 370 is fastened to both sides of the carbon plate fixing plate 340 is formed in a structure that is bolted by the bolt fixing plate 350 and the bolt 370 is fixed to the top plate.

That is, the carbon plate 150 coupled to the carbon plate support plate 330 is installed on the tension fixing unit 300 so that the carbon plate support plate 330 is closely attached to the upper plate on the side where the fixed fixing unit is installed. The carbon plate support part 160 is in close contact with the carbon plate support plate 330 by passing through the slit groove 346 of the carbon plate fixing plate 340 spaced a predetermined distance from each other, and the carbon plate 150 is fastened to the carbon plate fixing plate 340. The bolt 370 is fastened to both sides of the carbon plate fixing plate 340, and the bolt 370 is fixed to the bolt fixing plate 350 installed at the rear through the vertical plate 314. The carbon plate support plate 330, the carbon plate fixing plate 340, the bolt fixing plate 350, and the bolt 370 are installed.

In particular, as can be seen in Figure 3c, the tension fixing device 300, the carbon plate support plate 330, the carbon plate fixing plate 340 and the bolt fixing plate 350 is fastened in a structure that is coupled.

A fastening bolt hole 332 is formed at the side of the carbon plate support plate 330, and a central protrusion 334 is formed at an upper center contacting the upper plate so that the carbon plate is fixed to the upper portion thereof, and the carbon plate fixing plate 340 is provided. Two bolt through holes 344 are formed therein, and one of the bolt through holes is formed in contact with the slit groove 346, and the slit groove 346 of the carbon plate fixing plate 340 is thinly formed on one side, The carbon plate fixing plate 340 has a bolt hole 342 is formed on the side, and two bolt through holes 352 are formed in the bolt fixing plate 350.

As described above, bolt through holes 344 and 352 having the same size are formed in the carbon plate fixing plate 340 and the bolt fixing plate 350 so that the bolts 370 pass through the bolts 370. It is fixed through the through hole of the vertical plate 314 of 300.

4 is a view of a curved portion fixing device used in the reinforcement method according to the present invention, (a) is a perspective view of the curved portion fixing device, (b) is a plan view of the curved portion fixing device, (c) is a curved portion Figure is a view showing a state in which the fixing device is coupled to the top plate.

As can be seen in Figures 4a and 4b, the curved portion fixing device 400 is formed in a tiled form at a lower portion of the vertical portion 420 at a lower portion of the curved plate 410.

The curved portion fixing device 400 is a structure in which a protrusion 412 is formed in the center of the upper surface of the curved plate 410 in the longitudinal direction of about 2 to 3 mm, and the carbon plate is attached to the protruded upper portion thereof. Curved fixing unit 400 of the bent plate 410, the upper fastening bolt hole 416 is formed with a spacer 414 is placed on the upper corner of the fastening bolt hole 416 in the center of the spacer 414 Is formed.

As can be seen in Figure 4c, the curved portion fixing device 400, both sides of the width is fastened to the upper plate 110 with a fastening bolt 460, the curved portion fixing device 400, the carbon plate 150 in the center of the width The close contact is in close contact with the upper protrusion 412, the curved fixing unit 400 is firmly fixed to the upper plate 110 with a fastening bolt 460.

Looking at the effects of the above-described configuration of the present invention.

The present invention is a structure in which a fixed anchorage, a tension anchorage, and a curved portion anchorage device are integrally coupled by a reinforcement method for an upper plate of an aging bridge. Shear reinforcement and flexural reinforcement are possible by tensioning a carbon plate using a jack in a tension anchorage. It is configured to achieve an optimal reinforcing effect.

In addition, the present invention is installed by an unskilled person by the use of suitable members, such as fastening plate and carbon plate mounting plate of the fixing fixture and carbon plate support plate, carbon plate fixing plate, bolt fixing plate and bolt of the fixing fixture in the reinforcement of the upper plate using the carbon plate On the other hand, it is possible to easily work on re-tensioning and replacement after installation.

In addition, a method of attaching the carbon plate to the upper plate through the epoxy adhesive between the carbon plate and the upper plate as in the related art will be possible.

Claims (4)

In the reinforcement method for a structure using a carbon plate, An upper plate 110 on which anchoring grooves are formed at both points of the upper plate for reinforcement of the bridge 100; A carbon plate having a carbon plate support portion 160 formed on each side of the longitudinal direction while being arranged in a plurality of rows without using an epoxy adhesive or attached using an epoxy adhesive so as to be reinforced in response to the stress transmitted from the upper plate. 150; While fixing one side of the carbon plate support portion 160 of the carbon plate 150, the fixed end body 210 is formed in a cylindrical cross-section and a fastening protrusion 220 is formed to face each other on the top, and the fixed end body 210 and A fixing anchorage 200 which is cut to have a step in contact with the fastening protrusion 220 and has a fixed end fastening portion 230 formed on an outer circumferential surface thereof and fixed to the upper plate 110 by a fastening bolt 260; The fixing plate 200 is installed in the opposite position where the carbon plate 150 is formed so as to support the top plate 110, while the two are formed so that the vertical plate 310 having a height difference to face the vertical plate ( The horizontal plate 312 and the vertical plate 314 are welded to the 310, and a plurality of fastening bolt holes 318 are formed on the side surfaces of the vertical plate 310, and the horizontal plate fixed to be perpendicular to the vertical plate 310. A tension bolt 300 formed at one side of the 312 to be fixed to the upper plate and the fastening bolt, and fixed by tensioning the other side of the carbon plate support part 160 of the carbon plate 150; It is installed at the bent position of the carbon plate to enable shear reinforcement and flexural reinforcement, while the upper protrusion 412 is formed at the center of the upper surface of the bending plate 410 in the longitudinal direction, the carbon plate is attached to the protruding upper part, The spacer 414 is formed at the upper edge of the plate 410, and a curved portion fixed to the upper plate 110 by the fastening bolt 460 through the fastening bolt hole 416 through the center of the spacer 414. Fixing device 400; external prestressing reinforcement method using a carbon plate to reinforce the top plate. The method of claim 1, The fixing anchorage 200 is a portion embedded in the upper plate is a fixed end body 210 is formed in a cylindrical cross section, so that the fastening protrusion 220 on the top of the fixed end body 210 to face each other at 180 ° angle And a fixed end fastening portion 230 is formed at right angles to an adjacent position where the fastening protrusion 220 is formed, and fastening bolt holes 222 and 232 to the fastening protrusion 220 and the fixed end fastening portion 230, respectively. Is formed, The fastening plate 250 is a fastening plate 250, the carbon plate mounting hole 270, the carbon plate 150 is fastened to the structure, the fastening plate 220 made of a rectangular plate with a fastening bolt 260 to the fastening protrusion 220 250 is fastened, and the carbon plate 150 passing through the lower part of the fastening plate 250 passes through the slit groove of the carbon plate mounting hole 270, so that the carbon plate mounting hole 270 is provided at one side of the fastening protrusion 220. While being in close contact with the carbon plate support part 160 of the carbon plate 150 is fixed to be in close contact with the side of the carbon plate mounting hole 270, The carbon plate mounting hole 270 has a slit groove 272 is formed long so that the carbon plate 150 can be inserted from one side to the inside, while the carbon plate mounting hole 270 is one side is formed horizontally and the other side is Rounded, The fixing fixture 200 is fixed to the upper end when the fixed end body 210 is inserted into the buried groove formed in the upper plate when the buried in the upper plate and the fastening bolt 260 is fastened to the fixed end fastening portion 230 at the top plate External prestressing reinforcement method using carbon plate, characterized in that the structure is fixed. The method of claim 1, The tensile anchorage 300 is formed so that the vertical plate 310 having different heights on both sides of the length face each other, one side of the vertical plate 310 is formed horizontally and inclined at the other side, the vertical plate 310 Horizontal plate 312 is welded to the side formed with a high height of the vertical plate vertically welded to one side of the horizontal plate 312 is formed, In the tension fixing unit 300, a fastening bolt hole 318 is formed on the side surface of the low vertical plate 310 spaced to both sides, and a cylindrical embedding portion having a cylindrical cross section behind the horizontal plate 312. 320 is formed and embedded in the upper plate 110, The tension anchor 300 is a cylindrical buried portion 320 is inserted into the upper plate and the fastening bolt is fastened to the fastening bolt hole of the horizontal plate 312 is fixed so that there is no flow in the upper plate, The tension fixing unit 300 is coupled to the other side of the carbon plate support portion 160 of the carbon plate 150, while being able to be tensioned by the bolt 370, the tensile fixing unit 300, the carbon plate support plate 330, Carbon plate fixing plate 340 and bolt fixing plate 350 is made of a coupling structure, The carbon plate supporting plate 330 is fastened to the vertical plate 310 by the fastening bolt 360 to the tensile anchorage 300, and the carbon plate on one side and the other side of the length of the bolt 370 penetrating the vertical plate 314, respectively. While the fixing plate 340 and the bolt fixing plate 350 are fastened, the carbon plate 150 closely contacted between the carbon plate supporting plate 330 and the upper plate 110 passes through the slit groove 346 of the carbon plate fixing plate 340. In one state, the other side of the carbon plate support unit 160 is in close contact with the bolt plate 370 on both sides of the carbon plate fixing plate 340 is formed in a structure that is bolted to the bolt fixing plate 350 is fixed to the top plate, The carbon plate support plate 330 has a fastening bolt hole 332 is formed on the side surface and a central protrusion 334 is formed in the upper center contacting the upper plate, the carbon plate is fixed to the upper portion, and the carbon plate fixing plate 340 Two bolt through holes 344 are formed therein, and one of the bolt through holes is formed in contact with the slit groove 346, and the slit groove 346 of the carbon plate fixing plate 340 is thinly formed on one side, The bolt fixing plate 350 is made of a rectangular plate formed with a bolt through-hole 352 is an external pre-stressing reinforcement method using a carbon plate, characterized in that configured to tension the carbon plate by a tension anchor. The method of claim 1, The curved portion fixing device 400 has a vertical portion 420 is formed in the lower portion of the curved plate 410 in the form of a tile, the center of the upper surface of the curved plate 410 in the longitudinal direction of about 2 to 3mm protrusion 412 ) Is formed in the structure is a carbon plate attached to the protruding top, The spacer 414 is fixed to an upper corner of the curved plate 410 and a fastening bolt hole 416 penetrating the spacer 414 and the curved plate 410 is formed. The curved portion fixing device 400 is fastened to both sides of the upper plate 110 with a fastening bolt 460, the curved portion fixing device 400 is in close contact with the carbon plate 150 in the center width of the upper protrusion 421 Close to the), the curved portion fixing device 400 is fixed to the top plate 110 by a fastening bolt 460 is firmly fixed to the outer prestressing reinforcement method using a carbon plate, characterized in that the configuration to perform shear and bending reinforcement.