KR101298581B1 - Connecting structures and methods between frp decks, and deck and girder for tubular deck unit with hybrid connection of snap-fit and bonding - Google Patents

Abstract

PURPOSE: A connection structure and method of a bottom plate and a girder using adhesive mixing assembly and a snap-fit between fiber reinforced composite material deck tubes are provided to improve the integrity of a structure by using mechanical connection in a snap-fit form in a vertical direction and chemical connection with an adhesive in a horizontal direction. CONSTITUTION: A connection structure of a bottom plate and a girder using adhesive mixing assembly and a snap-fit between fiber reinforced composite material deck tubes comprises the following steps: laterally connecting fiber reinforced plastic (FRP) deck tubes to form a bottom plate and arranging the same on a girder (100) to integrally connect; equipping first and second downward protrusion joint parts and an upper part expansion part at one side of an FRP deck tube and equipping first and second upward protrusion joint parts and a lower part expansion part at the other side of the FRP deck tube; forming protrusions on the protrusion joint parts to mechanically interlock the protrusion joint parts with each other and vertically inserting the FRP deck tube to connect the upward protrusion joint part to the downward protrusion joint part into a snap-fit form; and joining the upper part expansion part to an upper cross section reduction part and the lower part expansion part to a lower cross section reduction part.

Description

Connecting Structures and Methods between FRP Decks, and Deck and Girder for Tubular Deck Unit with Hybrid Connection of Snap-fit and Bonding}

The present invention relates to a connection structure of the bottom plate and the girder, and a method of connecting the fiber reinforced composite material deck tube (deck tube) is built by the snap-fit and adhesive mixing assembly, specifically, fiber reinforced composite material (Fiber Reinforced Plastic (hereinafter, abbreviated as "FRP") is manufactured in the factory to have a hollow hollow section of the polygon, and the snap-fit method and the horizontal adhesive method that are inserted and connected vertically with neighboring tubes are mixed. The FRP deck tube having a connection structure is disposed on the upper surface of the girder and integrated to build a bottom plate and to be connected to the girder at the same time, and a connection method for forming such a connection structure.

A technology for constructing a bottom plate using a hollow cross-section FRP deck tube having a snap-fit connection structure is first developed by the present inventors and is registered in Korean Patent No. 10-0604251.

In order to use the FRP deck tube as the bottom plate of the bridge, a solid connection between the FRP deck tube and the girder as well as a solid connection between the FRP deck tube must be made, in particular, the work of connecting the FRP deck tube and the girder integrally It should be easy and efficient.

In the case of integrating the FRP deck tube by installing it on the top of the girder, the FRP deck tubes are integrally assembled and connected to each other, and the workability is improved by being integrated with the girder by using a shear connector such as a bolt member or a stud member. And it is very important to improve the construction quality, to shorten the air as well as to ensure the structural stability of the bottom plate.

In addition, in the case of the shear connection member made of bolt members, it is also very important to secure a sufficient working space to easily tighten the coupling member when connecting a fastening member such as a nut to the shear connector in order to integrate the shear connector and the FRP deck tube. It is important.

See Republic of Korea Patent Publication No. 10-0604251 (July 28, 2006).

In order to further maximize the possibility of utilizing the FRP deck tube as the bottom plate of the bridge, the present invention greatly enhances the connection strength at the connection between the adjacent neighboring FRP deck tube to provide a solid structural integration between the FRP deck tube. The goal is to achieve what is possible.

In particular, the present invention aims to achieve a solid connection between the FRP deck tube and the girder, and to make it easy and efficient to connect the FRP deck tube and the girder integrally.

Furthermore, the present invention provides a sufficient and efficient working space for easily tightening the fastening member when connecting a fastening member such as a nut to the shear connecting member to integrate the shear connector and the FRP deck tube. The goal is to achieve this.

In order to achieve the above object, in the present invention, a plurality of FRP deck tubes having a plurality of polygonal hollow cross-section side by side consisting of a top plate, a bottom plate and an abdominal plate connected side by side to form a bottom plate at the same time placed on the girder The FRP deck tube, which is integrally connected to the girder, has a first downward protrusion engaging portion formed downward in the middle of the upper extension portion of the upper plate, and a second downward downwardly formed on the outer surface of the outer abdominal plate. A protruding coupling portion and an upper extension portion which is further present in the transverse side from the formation position of the first downward protrusion coupling portion and gradually decreases in thickness toward the end portion; A first upward protrusion coupling portion formed upwardly from an outer side surface of the outer abdominal plate and connected to the first downward protrusion coupling portion in a snap-fit form so as to be detachable from the outer abdominal plate; The second upward protrusion coupling part is connected to the second downward protrusion coupling part in a snap-fit form so as to be detachable, and the second upward protrusion coupling part is further present on the lateral side from the position where the second upward protrusion coupling part is formed, and the thickness gradually decreases toward the end. The lower extension of the shape is provided on the other side; On the bottom surface of the lower plate from one side of the FRP deck tube formed with the second downward protrusion coupling portion, so that the lower extension provided on the other side of the neighboring FRP deck tube to the front to be bonded and bonded by an adhesive, A lower cross-sectional reduction portion of a concave shape corresponding to the thickness shape is formed; On the upper surface of the upper plate from the other side of the FRP deck tube formed with the first upward protrusion coupling portion so that the upper extension provided on one side of the adjacent neighboring FRP deck tube can be joined by an adhesive An upper cross-sectional reduction portion of a concave shape corresponding to the thickness thickness of the portion is formed; The outer abdominal plate with the first upward protrusion coupling portion is inclined; The protrusion coupling portion is formed with projections corresponding to each other to form a mechanical connection by biting each other; The FRP deck tube is fitted in a vertical direction to provide a snap-fit mechanical connection between the up and down projections, and the connection between the upper and upper cross sections and the lower and lower sections It is made integrally connected to each other by the bonding between the reduction portion; A shear connector protrudes from an upper surface of the girder; When the FRP deck tube is placed vertically on the upper surface of the girder sequentially in the axial direction, a through hole is formed in the position where the shear connector is present in the lower extension of the FRP deck tube, the shear connector penetrates the lower extension; A fastening member is fastened to the shear connection member protruding therethrough; If necessary, a pair of partition members are disposed on the lower extension portion at intervals in the direction perpendicular to the throttle so as to cover the position where the shear connector is inserted through the lower extension portion. When the partition member is provided as above, the FRP deck tube is placed on the girder, and the filler is filled in the space blocked by the pair of partition members as necessary, with the fastening member fastened to the shear connector. And, the bottom plate is built by the FRP deck tube is provided with a connection structure of the FRP deck tube and girder, characterized in that the FRP deck tube and the girder is integrated, and a connection method for forming such a connection structure.

In the present invention described above, a bedding die is provided on the upper surface of the girder as needed; A FRP deck tube is placed on the bedding die; The filling material filled in the space blocked by the pair of partition members may be filled in the space between the upper surface of the girder and the lower surface of the FRP deck tube through the through hole, and furthermore, the bedding die when the FRP deck tube is placed. In order to fit the height of the and, in a state in which the fastening member is connected to the shear connector in advance, the FRP deck tube may have a configuration lying on the fastening member.

According to the present invention, it is possible to achieve a strong structural integration between the FRP deck tube by greatly increasing the connection strength at the connection between the adjacent neighboring FRP deck tube.

In particular, in the present invention, in connecting the FRP deck tubes to each other, in addition to the mechanical method of the snap-fit type, it has a connection type of a mixture of chemical methods using an adhesive. That is, in the present invention, when the FRP deck tubes are connected to each other, the mechanical connection of the snap-fit form is made in the vertical direction, and the upper and lower ends of the adjacent FRP deck tubes are overlapped with each other in the horizontal direction, and thus overlap By making a chemically integral connection using an adhesive or the like on the formed portion, when the FRP deck tubes are connected to form a bridge bottom plate, the integrity of the entire bottom plate can be further maintained while maintaining continuity for the bottom plate bending. Enhance the effect.

In addition, in the present invention, when the FRP deck tube is connected to each other, in the open space of the portion where the snap-fit type connection is made, it is possible to proceed with the operation of connecting the FRP deck tube and the girder through the shear connection material, workability Not only is this greatly improved and the construction quality is improved, additional structural stability can be obtained. In particular, since the connection work between the FRP deck tube and the connection between the FRP deck tube and the girder proceeds at the same time in this open space, the connection work on the girder is completed while connecting the FRP deck tube sequentially, thus the construction speed is greatly increased. The effect of increasing is exerted.

In addition, in the present invention, in the configuration of the FRP deck tube, the upper extension for the adhesive connection with the adjacent FRP deck tube is made of a structure that becomes thinner gradually toward the end of the transverse direction, the upper extension is adhesive connection In order to cover the upper end face reduction part of the front neighboring FRP deck tube, the generation of weak spots due to abrupt cross-sectional change at the end of the upper end face reduction part is suppressed, and more stable and solid integration with the front neighboring FRP deck tube is achieved. Since the continuity between the FRP deck tube is strengthened, it is possible to secure excellent structural stability against bending when used as the bridge deck, and cracks in the road pavement such as asphalt, which is installed on the upper surface of the bridge deck consisting of the FRP deck tube The effect of being able to prevent this from occurring is exhibited.

In particular, in the present invention, by forming the outer abdominal plate existing on the other side through which the shear connector is penetrated in the FRP deck tube as the inclined surface, there is a wide space in the axial direction at the upper end of the protruding shear connector, so FRP In order to integrate the deck tube and the girder, there is an advantage that the fastening of the fastening member to the shear connector can be performed very easily in the same space as the space where the FRP deck tube is connected to each other.

Thus, according to the present invention, the FRP deck tube is interconnected and solidly integrated with the girder, making it very efficient to use as a bridge deck.

1 is a schematic perspective view showing a state of assembling the FRP deck tube according to the present invention.
2 is a schematic cross-sectional view taken along line CC of FIG. 1.
3 is a schematic cross-sectional view showing a form of exhibiting resistance when the vertical load is applied when the FRP deck tube of the present invention is connected.
Figure 4 is a schematic perspective view showing a state in which the FRP deck tube of the present invention is assembled on the girder.
FIG. 5 is a schematic enlarged view of a portion A of FIG. 4.
6 is a schematic perspective view showing a process of assembling an additional FRP deck tube in the state shown in FIG.
FIG. 7 is a schematic enlarged view of a portion B of FIG. 6.
8 is a schematic cross-sectional view taken along the line DD of FIG. 6.
FIG. 9 is a schematic cross-sectional view corresponding to FIG. 8 showing a state in which a filler is filled as needed following the state shown in FIG. 8.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. Although the present invention has been described with reference to the embodiments shown in the drawings, it is to be understood that the technical idea of the present invention and its essential structure and operation are not limited thereby.

1 is a schematic perspective view showing a state of assembling the FRP deck tube according to the invention, Figure 2 is a schematic cross-sectional view taken along the line C-C of FIG. As shown in the figure, the FRP deck tube 10 of the present invention is composed of a top plate 11, a bottom plate 12, and the abdominal plate 13 has a plurality of polygonal hollow 50, extending longitudinally long Has a configuration. The FRP as the material of the tube according to the present invention is composed of a resin selected from polyester, vinyl ester, panol or epoxy, and reinforcing fibers (glass fiber, carbon fiber, aramid fiber, etc.), and the FRP deck tube is drawn out. It is manufactured by the method.

The bottom plate is formed by connecting the FRP deck tube 10 having the cross-sectional configuration as described above with a neighboring FRP deck tube in the transverse side. Specifically, the FRP deck tube 10 according to the present invention is perpendicular to the FRP deck tube 20 (hereinafter, abbreviated as " front neighboring FRP deck tube 20 ") which has been previously installed so as to laterally neighbor. It is connected in a direction (top to bottom) and is connected to the front neighboring FRP deck tube 20 in a simple, yet robust, mechanically removable manner in the form of a snap-fit. To this end, the first downward protrusion coupling part 150a and the second downward protrusion coupling part 150b are formed at one side of the FRP deck tube 10 in the horizontal direction, respectively, and the first and second downward protrusion coupling parts ( The first upward protrusion coupling portion 151a and the second upward protrusion coupling portion 151b which are mechanically connected in a snap-fit form to be detachably attached to the 150a and 150b, respectively, are transverse to the FRP deck tube 10. It is formed on the other side.

Specifically, in the embodiment shown in the drawings, one side of the FRP deck tube 10 in the transverse side is formed with an upper extension portion 51 in which the upper plate 11 further extends in the transverse side, The first downward protrusion coupling part 150a is formed in the middle of the upper extension part 51 in the downward direction. In this way, the portion further present in the transverse side from the position where the first downward protrusion coupling part 150a is formed in the upper extension part 51 corresponds to the upper extension part 61. The upper extension 61 is fitted to the upper cross-sectional reduction portion 71 formed in a portion of the other upper plate of the front neighboring FRP deck tube 20, so that the upper extension 61 is the front neighboring FRP deck tube ( 20) Cover part of the upper plate on the other side.

In particular, in the present invention, the upper extension portion 61 has a structure in which the thickness gradually becomes thinner toward the end portion in the transverse direction. As will be described later, the upper extension 61 covers the upper cross-sectional reduction portion 71 of the front neighboring FRP deck tube 20, as the upper extension 61 becomes thinner toward the transverse end. Since the structure, the weak section due to the rapid cross-sectional change in the end portion of the upper cross-sectional reduction portion 71 is suppressed, there is an advantage that a more stable and solid integration with the front neighboring FRP deck tube 20 is made. .

Meanwhile, the FRP deck tube 10 having the second downward protrusion coupling part 150b is formed so that the lower extension part 62 provided on the other side of the front neighboring FRP deck tube 20 can be fitted and covered. On the bottom surface of the lower plate from one side in the transverse direction of the lower plate, a concave shape lower end face reduction portion 72 corresponding to the thickness of the lower expansion portion 62 is formed. At one side in the lateral direction of the FRP deck tube 10, the second downward protrusion coupling portion 150b protrudes downward from the outer surface of the outer abdominal plate.

On the other side in the lateral direction of the FRP deck tube 10, the first upward protrusion coupling portion 151a which is engaged with the first downward protrusion coupling portion 150a is provided to protrude upward from the outer side of the outer abdominal plate 1510. The lower extension part 52 which the lower plate 12 extends is formed in the lower part, and the 2nd upward direction which is engaged with the 2nd downward protrusion coupling part 150b in the middle of the lower extension part 52 is provided. The protrusion coupling part 151b is provided upward. As such, the lower extension part further present in the transverse side from the position where the second upward protrusion coupling part 151b is formed corresponds to the lower extension part 62. The lower extension part 62 is adapted to be fitted to the lower end face reduction part 72 formed on a portion of the bottom surface of the FRP deck tube adjacent to the rear (hereinafter referred to as "rear neighbor FRP deck tube"). Thus, the lower extension 62 covers a portion of the lateral one side bottom surface of the lower plate of the rear neighboring FRP deck tube.

Meanwhile, in the present invention, the outer abdominal plate 1510 of the FRP deck tube 10 in which the first upward protrusion coupling part 151a is formed is formed of an inclined surface. That is, the outer abdominal plate 1510 is inclined away from the second upward protrusion coupling part 151b toward the upward direction. As will be described later, the FRP deck tube 10 is placed on the girder 100 so that the shear connector penetrates the lower extension portion 52, and the fastening member such as a nut may be fastened to the shear connector projected through this. As described above, when the outer abdominal plate 1510 is inclined away from the second upward protrusion coupling part 151b, there is a wide space in the axial direction at the upper end of the protruding shear connecting member, which is sufficient to tighten the fastening member. The space is secured, and thus the work of tightening the fastening member can be performed very easily. That is, by forming the outer abdominal plate 1510 existing on the other side through which the shear connector penetrates in the inclined surface in the FRP deck tube 10, assembling between the FRP deck tube 10 and the girder 100 is very easy. The effect is to be able to perform.

In the present invention, the upper surface of the top plate 11 starting from the outer abdominal plate 1510 of the FRP deck tube 10, the upper expansion so that the upper extension 61 of the rear neighboring FRP deck tube can be fitted and covered An upper end reduction portion 71 of a concave shape corresponding to the thickness of the portion 61 is formed. As mentioned above, since the upper extension portion 61 has a structure that becomes thinner gradually toward the transverse end portion, the upper cross-sectional reduction portion 71 covered by the upper extension portion 61 is also expanded upwardly. In accordance with the thickness change of the portion 61, the concave depth is gradually changed. That is, when the upper extension 61 is covered by the upper cross-sectional reduction portion 71, the overall thickness of the member is constant, but the concave depth of the upper cross-sectional reduction portion 71 in accordance with the thickness change of the upper extension 61 Is to be changed.

In the present invention, the FRP deck tube 10 is fitted side by side in parallel to the side of the transverse side of the front neighboring FRP deck tube 20 of the same type to form the bottom plate of the bridge. Specifically, as shown in the figure, on the other side of the front neighboring FRP deck tube 20, the FRP deck tube 10 is placed vertically from the top and pressed to connect with the front neighboring FRP deck tube 20, The first upward protrusion coupling part 151a of the front neighboring FRP deck tube 20 is fitted by being connected to the first downward protrusion coupling part 150a of the FRP deck tube 10 which is positioned from above. At the same time, the second upward protrusion coupling part 151b of the front neighboring FRP deck tube 20 is fitted and connected to the second downward protrusion coupling part 150b of the FRP deck tube 10. In this way both FRP deck tubes 10, 20 are firmly connected by mechanical engagement. At this time, since the first upward protrusion coupling part 151a and the second downward protrusion coupling part 150b have a predetermined elasticity, when the FRP deck tube 10 is pressed with a force of a predetermined level or more, slip between the protrusions is performed. As this occurs, the first upward protrusion coupling part 151a and the second downward protrusion coupling part 150b are finely retracted to facilitate mechanical connection of the protrusion period. After the projections slip on each other, the first upward protrusion coupling part 151a and the second downward protrusion coupling part 150b are returned to each other by elasticity, so that the protrusions are firmly bited to each other.

As such, when the snap-fit connection between the protrusion coupling parts is made, an adhesive may be applied to the protrusion coupling parts to further make the connection by the adhesive. In other words, the adhesive is applied to the protrusion coupling portion just before the protrusion coupling portion forms a mechanical connection with each other, so that the mechanical connection of the protrusion period is made as described above, so that the chemical connection by the adhesive is further added. It can also be strengthened.

As described above, the first downward protrusion coupling part 150a is fitted to the first upward protrusion coupling part 151a, and the second downward protrusion coupling part 150b is fitted to the second upward protrusion coupling part 151b, so that both FRP deck tubes are fitted. When the (10, 20) is to be connected, the upper extension 61 of the FRP deck tube 10 to the upper cross-sectional reduction portion 71 formed in a portion of the other top plate of the front neighboring FRP deck tube (20) As such, the upper extension 61 covers a portion of the front side of the front neighboring FRP deck tube 20, ie the upper cross-sectional reduction portion 71. In addition, the lower cross-sectional reduction portion 72 formed on the bottom surface of the lower plate from one side of the FRP deck tube 10 is placed on the lower expansion portion 62 formed on the other side of the front neighboring FRP deck tube 20, The lower extension part 62 of the front neighboring FRP deck tube 20 covers a portion of the bottom surface of the lower plate of the FRP deck tube 10, that is, the lower cross-sectional reduction part 72.

As such, the upper extension 61 covers the upper end face reduction portion 71 of the front neighboring FRP deck tube 20, and the lower end face reduction portion 72 is formed on the other side of the front neighboring FRP deck tube 20. When covered by the lower extension 62, between the bottom of the upper extension 61 and the upper end of the upper end face reduction portion 71, and the upper end and lower end face reduction portion 72 of the lower extension 62. An adhesive, such as epoxy, is applied between and bonded together.

3, the upper extension 61 of the FRP deck tube 10 covers the upper end reduction portion 71 on the other side of the front neighboring FRP deck tube 20, and is integrally connected by an adhesive, and the front neighboring FRP is shown. The lower end portion 62 of the deck tube 20 covers the lower end face reduction portion 72 of the FRP deck tube 10 and is integrally connected by an adhesive, thereby providing excellent resistance when the stress acts in the transverse direction. As an example showing the exertion, a schematic cross-sectional view of the state where the vertical load is applied at the top is shown. As shown in FIG. 3, when a vertical downward load is applied to the FRP deck tubes 10 and 20 which are adjacently connected to each other, a tensile force due to bending is applied at the position of the lower plate. The tensile force due to such a bending acts to spread between the second downward protrusion coupling part 150b and the second upward protrusion coupling part 151b, which are connected to each other, and the lower extension part of the front neighboring FRP deck tube 20. A portion of the bottom surface of the lower plate of the FRP deck tube 10 is covered by 62 so that the bottom plate of the FRP deck tube 10 is integrally connected with an adhesive, thereby causing a large resistance to the tensile force, thereby bearing a part of the tensile force due to the bending occurring at the position of the lower plate. Therefore, the tensile force acting to spread between the second downward protrusion coupling portion 150b and the second upward protrusion coupling portion 151b is reduced, and thus, the second downward protrusion coupling portion 150b is broken. Breakage is prevented from occurring.

When a vertical upward load is applied, a tensile force due to bending acts at the position of the upper plate, and acts to open between the first downward protrusion coupling part 150a and the first upward protrusion coupling part 151a. Since the upper extension 61 of the FRP deck tube 10 is integrally connected by an adhesive by covering a part of the upper side plate of the other side of the front neighboring FRP deck tube 20, there is a large resistance to the tensile force due to bending To bear a part of the tensile force due to the bending occurring at the position of the upper plate, and thus to the tensile force acting to open between the first downward protrusion coupling portion 150a and the first upward protrusion coupling portion 151a. The resistance is prevented, and the breakage of the first upward protrusion coupling part 151a is prevented from occurring, and therefore, the bridge bottom plate, that is, the bridge bottom plate made by the connection of the FRP deck tube due to the tensile force due to the bending, is damaged. this Occurrence is prevented. Particularly, as described above, in the present invention, the upper extension 61 of the FRP deck tube has a structure in which the thickness becomes thinner toward the transverse end, thereby covering the upper end face reduction part 71 and being adhesively connected, and the lower extension. The portion 62 is also connected to the lower cross-sectional reduction portion 72 and the structure in which the thickness becomes thinner toward the transverse end, so that a sudden change in tensile stress does not occur at the portion to which the adhesive connection is made. Therefore, even if road pavement such as asphalt made of brittle material with very low tensile resistance is installed on the upper surface of bridge deck made of FRP deck tube connection, it is possible to prevent the occurrence of cracks in the road pavement in the area of adhesive connection. It has the advantage of being able to.

In FIG. 3 above, the vertical load acting from the top as a cause of the tension force acting to open the up-projection coupling portion and the down-projection coupling portion is illustrated, but not only the vertical load as shown in the drawing, but also the temperature contraction or expansion, or the wheels. The tensile force may also be affected by other factors such as elastic deformation of the packaging material due to the load, horizontal load caused by sudden braking of the vehicle, wind, or earthquake.

As described above, in the present invention, by securing a sufficient bonding area between the adjacent FRP deck tube in the upper and lower surfaces to achieve the adhesive connection of the adhesive, while maintaining the vertical connection method, a large resistance to the tensile force that can occur between the FRP deck tube And thus prevent breakage at the connection of the FRP deck tube. Therefore, the FRP bottom plate according to the present invention produced by the bonding of such FRP deck tube has excellent durability and strength.

Next, with reference to Figures 4 to 9, it will be described for each step of the structure and connection method for forming a bridge bottom plate in a state integrated with the girder by installing the above FRP deck tube according to the present invention.

FIG. 4 is a schematic perspective view showing the state in which the FRP deck tube is assembled on the girder, and FIG. 5 is a schematic enlarged view of the circle A portion of FIG. 4. FIG. 6 is a schematic perspective view showing a process of assembling an additional FRP deck tube in the state shown in FIG. 4, and FIG. 7 is a schematic enlarged view of a circle B portion of FIG. 6. FIG. 8 is a schematic cross sectional view taken along the line DD of FIG. 6, and FIG. 9 is a schematic cross sectional view corresponding to FIG. 8 showing a state where the filler 130 is filled as necessary following the state shown in FIG. 8. Is shown.

When the girder 100 is made of steel girders, in the connection portion between the girders, the connecting plate is located on the upper flange of the girder, the connecting bolt connecting the connecting plate to the upper flange of the girder is present in the state protruding over the upper surface of the girder. Done. Therefore, in order to mount the bottom plate flat on the upper surface of the girder at a constant height, a bedding part having a predetermined height is formed on the upper surface of the girder 100. This bedding part may be uniformly formed at a predetermined height with a variety of materials such as concrete, synthetic resin, rubber, wood, etc. with respect to the entire upper flange of the girder 100, as illustrated in the drawing, the bedding die 110 as described above Installed by using the bedding dies 110 may be formed by pouring a filler, such as concrete, mortar on the upper surface of the girder 100 in the field.

4 and 5 illustrate an embodiment in which the filling material is placed on the upper surface of the girder 100 to form a bedding part. In this case, the upper surface of the girder 100 is elongated in the axial direction to form the bedding part. A pair of bedding dies 110 having a shape are installed on the top surface of the girder 100 at intervals on both sides of the upper direction of the upper flange of the girder 100, and thus between the pair of bedding dies 110. A space is formed to fill the filler into the bedding portion. The bedding dies 110 may be made of various materials such as synthetic resin, rubber, wood.

On the other hand, the shear connector 120 is installed on the upper surface of the girder (100). When the girder 100 is made of a steel beam, the lower end of the shear connecting member 120 may be present in advance connected to the girder 100 by welding. The shear connector 120 is preferably welded to the upper surface of the girder 100 just before mounting the FRP deck tube so that the installed FRP deck tube can be connected to the correct position. In particular, when the plurality of girders 100 are arranged side by side, as shown in the figure, the FRP deck tube is placed in the axially orthogonal direction across all the plurality of girders 100, wherein the position where the FRP deck tube is to be placed In accordance with the shear connector 120 is installed by welding to the girder 100 to be located in a straight line in the direction perpendicular to the axial axis.

If the girder 100 is made of a concrete beam, the bottom of the shear connector 12 may be embedded in the concrete, even if the girder 100 is made of a concrete beam, the base plate is embedded in the concrete and the shear connector ( The lower end of the 120 may be connected to the base plate by welding or the like.

On the other hand, as mentioned above, since the bedding die 110 generally exists on the upper surface of the girder 100, when the FRP deck tube 10 is placed, it is shown in the figure to match the height with the bedding die 110 As described above, the FRP deck tube 10 may be placed on the fastening member 123 in a state in which a fastening member 123 such as a nut is previously connected to the shear connector 120 made of a bolt member. 4 and 5, the shear connector 120 is shown in an exploded perspective view in order to show such a configuration in detail. Reference numeral 122 is installed on the fastening member 123, if necessary, so that the FRP deck tube 10 is on the upper surface. The washer member 122 is placed on. In this way, when the fastening member 123 is installed in advance so that the FRP deck tube 10 is placed thereon, the height of the fastening member 123 can be easily adjusted by installing the height of the FRP deck tube 10. . Filling material, such as concrete, may be placed between the bedding dies 110 to form a bedding part. When the bedding part is formed in this way, the FRP deck tube 10 may be raised or unnecessary upward force due to the bedding part. However, when the fastening member 123 is pre-installed on the shear connector 110 as above, and the FRP deck tube 10 is placed on the fastening member 123, the FRP deck tube 10 is removed from the upper surface of the girder 100. It is possible to maintain a constant height, and thus the effect of being able to prevent in advance the FRP deck tube 10 is raised or unnecessary upward force due to the bedding portion. Furthermore, since the FRP deck tube 10 is supported by the fastening member 123 even when the bedding portion is damaged during the use of the bridge, the FRP deck tube 10 can maintain the original installation height constantly. The effect of being able to maintain the flatness of the bridge bottom plate formed by the FRP deck tube 10 is exerted.

4 to 8, when the FRP deck tube 10 is placed vertically on the upper surface of the girder 100 sequentially in the axial direction, the shear connector in the lower extension 52 of the FRP deck tube 10 The through hole 520 is formed at the position where the 120 exists, so that the shear connecting member 120 passes through the lower extension portion 52. The end of the shear connecting member 120 is fastened by fastening the fastening member 123 such as a nut. The through hole 520 is preferably formed as a long hole in consideration of the variability of the position where the shear connector 120 is installed. In particular, as will be described later, if necessary, the upper end of the shear connector may be embedded in the filler, when the through-hole 520 is formed as a long hole, when it is necessary to bury the upper end of the shear connector in the filler, In the state in which the fastening member 123 is fastened, a filler such as concrete may naturally flow into the space between the bedding dies 110 through a long hole around the fastening member 123, thereby easily forming a bedding part. It will be possible.

As described above, since the shear connector 120 passes through the lower extension portion 52 of the open side of the FRP deck tube 10, the shear connector 120 opens the operation of fastening the fastening member 123 to the shear connector 120. It can be performed in a position, and thus there is an advantage that the fastening work of the fastening member 123 to the shear connector 120 can be made very easily. In particular, as mentioned above, in the present invention, the outer abdominal plate 1510 of the FRP deck tube 10 in which the first upward protrusion coupling part 151a is formed is formed of an inclined surface. Therefore, as described above, the FRP deck tube 10 is placed on the girder 100 so that the shear connecting member 120 penetrates the through hole 520 of the lower extension 52, and thus is fastened to the shear connecting member 120 protruding therethrough. When fastening by fastening the member 123, the fastening member 123 can be tightened very easily in a state where sufficient space for fastening the fastening member 123 is secured, and thus the FRP deck There is an advantage that the assembly between the tube 10 and the girder 100 can be performed very easily.

On the other hand, in the present invention as described above by fastening the fastening member 123 to the shear connecting member 120 in the state in which the lower connecting portion 52 of the FRP deck tube 10 through the shear connecting member 120, FRP deck tube 10 ) And the upper part of the shear connector 120 to be embedded in the filler if necessary to further strengthen the connection between the girder and the FRP deck tube (10) to enhance the synthetic effect even after connecting to the girder (100). It may be. When it is necessary to cast fillers such as concrete and mortar as described above, the pair of partition members 540 are angularly orthogonal to cover the position where the shear connecting member 120 is inserted through the lower extension 52. It is installed on the lower extension portion 52 at intervals. The pair of partition members 540 may be installed in advance, but after the shear connector 120 penetrates the lower extension 52 and the fastening member 123 is fastened to the shear connector 120, the FRP deck is provided. It is preferably installed in the tube.

The partition member 540, when the FRP deck tube 10 is continuously assembled in the axial direction, the outer abdominal plate 1510 and the lower extension 52 of the one side FRP deck tube 10, the adjacent FRP deck It is interposed between the upper extension portion 51 and one side wall of the tube, the shear connection member 120 is positioned between the pair of partition member 540.

On the other hand, the partition member 540, when assembling the neighboring FRP deck tube, so as not to prevent the second downward protrusion coupling portion 150b is lowered, so that it can be restored to the original form again after shrinkage to form a watertight wall, It is preferable to be made of an elastic material such as a sponge having a large restoring force.

As such, when a stronger connection between the FRP deck tube 10 and the girder 100 is required, the FRP deck tube 10 is placed on the girder 100, and the fastening member 123 is connected to the shear connector 120. In a state where the FRP deck tube 10 and the girder 100 are integrally connected to each other in a state of being fastened, as illustrated in FIG. 9, as illustrated in FIG. 9, a pair of partition members 540 in which the shear connecting member 120 protrudes is positioned. Filled material 130 such as non-condensed mortar, non-condensed concrete, or the like is filled in the space blocked by the condensate. To this end, the injection hole 131 is formed through the upper portion 51 of the FRP deck tube. That is, when the filler 130 is injected through the injection hole 131, the outer abdominal plate 1510 and the lower extension portion 52 of the one side FRP deck tube 10 and the upper extension portion of the neighboring FRP deck tube The filler 130 is filled in the filler 130 while the filler 130 is filled in a space formed between the 51 and one side wall and between the pair of partition member 540. At this time, the filler 130 flows through the through hole 520 of the lower extension portion 52 through which the shear connecting member 120 penetrates, and at the interval between the bedding die 110 and the upper surface of the girder 100. The filling material 130 may also be filled in the space formed by the bedding part. That is, as shown in Figure 9, the filler 130 is also filled in the space between the lower surface of the FRP deck tube 10 and the bedding die 110, and the upper surface of the girder 100 to form a bedding portion, the filling material thus filled When the 130 is cured, the shear connecting member 120 to which the fastening member 123 is connected is embedded in the filler 130, so that the shear connecting member 120 and the fastening member 123 are primarily connected through the binding. The secondary connection between the existing FRP deck tube and the girder is made, which makes the integral connection between the FRP deck tube and the girder stronger.

In the present invention, after the bedding die 110 is installed, the filling material may be poured in the field to form the bedding part. Alternatively, in the state where the bedding part is formed on the upper surface of the girder 100 in advance, the FRP as described above. It may be connected to the girder 100 while connecting the deck tube to each other. That is, when the plate-shaped bedding part is formed in advance on the upper surface of the girder 100 using synthetic resin, concrete, rubber, wood, etc., the bedding dies 110 for placing the filler in the field are omitted.

In addition, the configuration in which the shear connector 120 is embedded in the filler 130 may be selectively taken as necessary, and in the present invention, when the filler embedded structure of the shear connector 120 is not required, Installing the partition member 540, forming the injection hole 131 in the upper extension portion 51 of the FRP deck tube, and injecting the filler between the partition member 540 is omitted.

Through the configuration of the connection structure and connection method of the FRP deck tube and the girder according to the present invention as described above, the FRP deck tube 10 is connected to a plurality of at the same time to build a bottom plate, the FRP deck tube 10 is a girder It is solidly integrated with (100), and according to the present invention, the effect of being able to easily build the bottom plate of the bridge integrated with the girder 100 by using the FRP deck tube, of course, of the bottom plate The construction performance is greatly improved, and the structural stability of the bottom plate formed of the FRP deck tube is further improved by the integral connection between the FRP deck tube and the integral connection between the FRP deck tube and the girder, so that the FRP having light weight, high strength and high durability characteristics The effect that the utilization of the deck tube and the bottom plate using the same is exerted.

10: FRP deck tube
100: girder

Claims (8)

Consists of a top plate, a bottom plate and an abdominal plate, a plurality of FRP deck tubes having a plurality of polygonal hollow cross-sections connected side by side to form a bottom plate at the same time disposed on the girder 100 and integrally connected to the girder 100 As a structure,
The FRP deck tube,
A first downward protrusion coupling part 150a formed downward in the middle of the upper extension part 51 of the upper plate, a second downward protrusion coupling part 150b downwardly formed on an outer side surface of the outer abdominal plate, and the second downward protrusion coupling part 150b; 1, there is provided an upper extension 61 on one side which is further present in the transverse side from the formation position of the downward protrusion coupling part 150a and gradually decreases in thickness toward the end;
A first upward protrusion coupling portion 151a formed upward from an outer side surface of the outer abdominal plate 1510 and connected to the first downward protrusion coupling portion 150a in a snap-fit form so as to be detachable; A second upward protrusion coupling part 151b formed upward in the middle of the extension part 52 and connected to the second downward protrusion coupling part 150b in a snap-fit form so as to be detachable; There is a lower extension 62 on the other side which is further present in the transverse side from the formation position of the coupling portion 151b and gradually decreases in thickness toward the end;
From the one side of the FRP deck tube formed with the second downward protrusion coupling portion 150b is formed so that the lower extension 62 provided on the other side of the neighboring FRP deck tube to the front to be fitted and bonded by an adhesive On the bottom of the lower plate, a lower cross-sectional reduction portion 72 of a concave shape corresponding to the thickness shape of the lower expansion portion 62 is formed;
From the other side of the FRP deck tube is formed with the first upward protrusion coupling portion (151a) is formed so that the upper expansion portion 61 provided on one side of the neighboring FRP deck tube to the back to be bonded and bonded by an adhesive On the upper surface of the upper plate, a concave upper cross-sectional reduction portion 71 corresponding to the thickness of the upper expansion portion 61 is formed;
The outer abdominal plate 1510 provided with the first upward protrusion coupling part 151a is inclined;
The protrusion coupling parts 150a, 151a, 150b, and 151b are formed with protrusions corresponding to each other to form a mechanical connection by being bitten together;
The FRP deck tube is fitted in the vertical direction to form a snap-fit type mechanical connection between the up and down protrusion coupling portions, and at the same time, the joint between the upper extension portion 61 and the upper end reduction portion 71; It is made integrally connected to each other by the bonding between the lower expansion portion 62 and the lower cross-sectional reduction portion 72;
An upper surface of the girder 100 is provided with a shear connecting member 120 protruding therefrom;
When the FRP deck tube is placed vertically on the upper surface of the girder 100 sequentially in the axial direction, the through hole 520 is formed at the position where the shear connector 120 is present in the lower extension portion 52 of the FRP deck tube The shear connector 120 penetrates the lower extension portion 52;
The FRP deck tube is placed on the girder 100 and the fastening member 123 is fastened to the shear connector 120 protruding through the FRP deck tube so that the FRP deck tube and the girder 100 are connected to each other;
The connection structure of the bottom plate and the girder by assembling the FRP deck tube, characterized in that the FRP deck tube and the girder 100 is integrated while the FRP deck tube is connected to each other to form a bottom plate.
The method of claim 1,
A pair of partition members 540 are disposed on the lower extension portion 52 at intervals in the perpendicular direction of the axial axis so as to cover the position where the shear connecting member 120 penetrates the lower extension portion 52;
With the FRP deck tube on the girder 100 and the fastening member 123 fastened to the shear connecting member 120, the filler 130 is placed in the space blocked by the pair of partition member 540. Filled, the connecting structure of the bottom plate and the girder by assembling the FRP deck tube, characterized in that the shear connector 120 is embedded in the filler (130).
The method of claim 2,
The bedding die 110 is installed on the upper surface of the girder 100;
An FRP deck tube is placed on the bedding die (110);
The filling material 130 filled in the space blocked by the pair of partition member 540 is filled in the space between the upper surface of the girder 100 and the lower surface of the FRP deck tube through the through hole 520 to be bedding. Connection structure of the bottom plate and the girder by the assembly of the FRP deck tube, characterized in that the addition is formed.
4. The method according to any one of claims 1 to 3,
When the FRP deck tube 10 is placed in the state in which the fastening member 123 is connected to the shear connector 120 in advance so that the height and the height of the bedding die 110 can be maintained, the FRP deck tube is sheared. Connection structure of the bottom plate and the girder by assembling the FRP deck tube, characterized in that it has a configuration lying on the fastening member 123 previously connected to the connecting member (120).
Consists of a top plate, a bottom plate and an abdominal plate to form a bottom plate by connecting the plurality of FRP deck tubes having a plurality of polygonal hollow cross-section side by side side by side on the girder 100 to connect integrally with the girder 100 As a method,
The FRP deck tube,
A first downward protrusion coupling part 150a formed downward in the middle of the upper extension part 51 of the upper plate, a second downward protrusion coupling part 150b downwardly formed on an outer side surface of the outer abdominal plate, and the second downward protrusion coupling part 150b; 1, there is provided an upper extension 61 on one side which is further present in the transverse side from the formation position of the downward protrusion coupling part 150a and gradually decreases in thickness toward the end;
A first upward protrusion coupling portion 151a formed upward from an outer side surface of the outer abdominal plate 1510 and connected to the first downward protrusion coupling portion 150a in a snap-fit form so as to be detachable; A second upward protrusion coupling part 151b formed upward in the middle of the extension part 52 and connected to the second downward protrusion coupling part 150b in a snap-fit form so as to be detachable; There is a lower extension 62 on the other side which is further present in the transverse side from the formation position of the coupling portion 151b and gradually decreases in thickness toward the end;
From the one side of the FRP deck tube formed with the second downward protrusion coupling portion 150b is formed so that the lower extension 62 provided on the other side of the neighboring FRP deck tube to the front to be fitted and bonded by an adhesive On the bottom of the lower plate, a lower cross-sectional reduction portion 72 of a concave shape corresponding to the thickness shape of the lower expansion portion 62 is formed;
From the other side of the FRP deck tube is formed with the first upward protrusion coupling portion (151a) is formed so that the upper expansion portion 61 provided on one side of the neighboring FRP deck tube to the back to be bonded and bonded by an adhesive On the upper surface of the upper plate, a concave upper cross-sectional reduction portion 71 corresponding to the thickness of the upper expansion portion 61 is formed;
The outer abdominal plate 1510 provided with the first upward protrusion coupling part 151a is inclined;
The protrusion coupling parts 150a, 151a, 150b, and 151b are formed with protrusions corresponding to each other so as to form a mechanical connection;
An upper surface of the girder 100 is provided with a shear connecting member 120 protruding therefrom;
The FRP deck tube is fitted in a vertical direction to provide a snap-fit type mechanical connection between the up and down protrusion coupling portion, and at the same time, the joint between the upper extension portion 61 and the upper cross section reduction portion 71; By connecting the lower expansion portion 62 and the lower cross-sectional reduction portion 72 integrally connected to each other to form a bottom plate;
When the FRP deck tube is placed vertically on the upper surface of the girder 100 sequentially in the axial direction, a through hole 520 is formed at the position where the shear connector 120 is present in the lower extension portion 52 of the FRP deck tube. The shear connector 120 passes through the lower extension portion 52;
Fastening member 123 is fastened to the through-connected shear connector 120 to connect the following FRP deck tube with the FRP deck tube already installed in the state connecting the FRP deck tube with the girder 100;
How to connect the bottom plate and the girder by assembling the FRP deck tube, characterized in that the FRP deck tube is connected to each other to form a bottom plate and the FRP deck tube and the girder (100).
The method of claim 5,
When the FRP deck tube is integrally connected to each other to form the bottom plate, before connecting the subsequent FRP deck tube, the position where the shear connector 120 is inserted through the lower extension 52 in the already installed FRP deck tube. A pair of partition member 540 is installed on the lower extension portion 52 at intervals in the orthogonal direction so as to wrap;
With the FRP deck tube on the girder 100 and the fastening member 123 fastened to the shear connecting member 120, the filler 130 is placed in the space blocked by the pair of partition member 540. Filling, the connecting method of the bottom plate and the girder by assembling the FRP deck tube, characterized in that the shear connector 120 is embedded in the filler (130).
The method according to claim 6,
The bedding die 110 is installed on the upper surface of the girder 100;
When installing an FRP deck tube on the top of the girder (100), placing the FRP deck tube on the bedding die (110);
When the filler 130 is filled in the space blocked by the pair of partition member 540, the filler 130 passes through the through hole 520 and the top surface of the girder 100 and the bottom surface of the FRP deck tube. How to connect the bottom plate and the girder by assembling the FRP deck tube, characterized in that the bed is formed between the bottom surface of the FRP deck tube and the upper surface of the girder (100) to be filled in the space therebetween.
8. The method according to any one of claims 5 to 7,
When the FRP deck tube 10 is placed on the girder 100, the fastening member 123 is connected to the shear connector 120 in advance so as to match the height of the bedding die 110 and maintain the height thereof;
The method of connecting the bottom plate and the girder by assembling the FRP deck tube, characterized in that to place on the fastening member (123) previously connected to the shear connector (120).

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