KR200294571Y1 - Hybrid girder using frp or frc - Google Patents

Abstract

The present invention relates to a filled composite tube girder using a polymer composite material (layered composite material; FRP, fiber reinforced composite material (FRC)) applicable to general bridges, railway bridges, overbridges, etc. A plurality of connectors 12 integrally formed on the inner circumferential surface of the composite tube 10 during the initial molding production to maximize the composite action of the composite tube 10 and the composite tube 10 and the concrete 11 filled therein And, in order to facilitate the installation of the formwork during the construction of the upper bottom plate 70 in the longitudinal direction of the composite pipe 10, the support plate 20 is installed in pairs on the upper peripheral surface of the steel pipe between the support plate 20 It is installed in a longitudinal direction and comprises a plurality of shear connecting members 30 for connecting the composite pipe 10 to the upper bottom plate 70, the compressive strength, compared to the bridge made of ordinary steel or reinforced concrete material, It is not only excellent in single strength, flexural strength, tensile strength, crack resistance, vibration resistance, light weight, durability, and fire resistance, but also improves quality problems due to on-site welding and fabrication. It can replace the ingirder bridge, and the girder's height is small, so the use in the overbridge is very effective.

Description

HYBRID GIRDER USING FRP OR FRC}

The present invention relates to a girder bridge, and more particularly, to a filled composite tube girder using a polymer composite material that can replace the reinforced concrete girder, steel girder, concrete filled steel pipe girder bridge.

The role of the girder in the bridge is an important bridge element that serves to transfer the working loads such as the fixed load and the vehicle load from the upper portion through the girder bridge or alternately.

Conventional girder bridges can be classified into steel girder, reinforced concrete girder, and filled steel girder bridge. Among them, steel girder bridge is welded and assembled using a large number of steels, which is expensive in terms of economics, and it is easy to be damaged by buckling by compressive loads when compressive loads are applied. There is a problem such as deflection and vibration is small, there is a disadvantage that must be painted on the steel surface steadily during maintenance.

In case of concrete girder bridge, the weight of concrete itself becomes heavy and the weight acting on the entire bridge becomes uneconomical for the design of the bridge.

On the other hand, concrete filled steel pipe girders are used to withstand long span structures or high loads, but require a large number of girders, and if the length is more than 12m, welded joints should be made in the field due to transport problems. Due to the need for a large lifting machine, the risk of defects is high due to the complexity of manufacturing and installation work in the field and many field welding work. In particular, the welding amount of the shear connector is high, causing local deformation of the steel pipe, and the risk of brittleness is exposed by surface hardening by the welding heat input.

In addition, the concrete-filled steel pipe girder has a problem of welding work of the shear connector and the steel pipe, the problem of welding work of the support plate and the steel pipe to support the upper bottom plate and form the formwork, and secure the integral behavior with the concrete filled inside the steel pipe In order to solve the problems inherent in the manufacturing and field installation of concrete filled steel pipe girders derived from the installation and manufacturing problems of the hook projections or shear connectors.

The present invention was devised to solve the problems of the existing bridges as described above, not only has excellent strength and rigidity, but also has excellent usability against vibration, deflection and cracking, and is simple to assemble and install, and reduces the number of girders used. Its purpose is to provide a bridge girder that can reduce the mold height and shorten the construction process by implementing the section reinforcement element at the manufacturing stage, thereby providing economical and beautiful appearance.

In addition, the present invention induces integral behavior between the filling material and the composite pipe by installing a shear key or rib inside the layered composite pipe and the fiber reinforced composite pipe, and a shear for securing a composite behavior between the top plate and the composite pipe. The purpose is to achieve a bridge girder that provides the convenience of construction so that the connecting material can be simply joined using a wedge or an adhesive.

The purpose of this invention is to composite composite tube (10) filled with concrete or fiber-reinforced composite material therein, and composite tube (10) and the composite tube during the initial molding to maximize the composite action of the concrete (11) filled therein ( A plurality of connectors 12 formed integrally with the inner circumferential surface of 10), and in order to facilitate the installation of the formwork during the construction of the upper bottom plate 70 is installed in pairs on the upper outer peripheral surface in the longitudinal direction of the composite pipe (10) The support plate 20 is installed in the longitudinal direction of the steel pipe between the support plate 20 and the filling composite pipe girder including a plurality of shear connector 30 for connecting the composite pipe 10 to the upper bottom plate 70 Is achieved.

At this time, in order to achieve the integrated behavior between the composite pipe and the upper bottom plate, the composite pipe and the connection between the bottom plate and the layered composite pipe by using the joint pipe and the edge or the adhesive (bond) using the shear connection material of the steel duvel bar or carbon layered layered composite It is desirable to induce synthetic behavior.

In addition, an object of the present invention is to maintain the interval between the outer compound tube 16, the inner compound tube 18 having an outer diameter smaller than the inner diameter of the outer compound tube 16, the outer compound tube 16 and the inner compound tube 18. Role of the formwork in the construction of the composite tube 10 and the upper bottom plate 70 and the concrete 19 and the composite material 11 filled between the spacer 19 and the outer composite tube 16 and the inner composite tube 18. The upper outer circumferential surface of the outer composite tube 16 to connect the composite plate 10 to the upper bottom plate 70 and the support plate 20 installed in pairs on the upper outer circumferential surface in the longitudinal direction of the outer composite tube 16 It is achieved by a packed composite tube girder comprising a plurality of shear connectors 30 installed in the.

The above and other objects, specific advantages and novel features of the present invention will become more apparent from the following detailed description and preferred embodiments associated with the accompanying drawings.

1a to 1c is a cross-sectional view showing a first embodiment of a packed composite tube girder according to the present invention,

2a to 2h are perspective views showing various embodiments of the shear connector,

3a to 3c is a perspective view showing the structure of the shear connector joined to the composite pipe,

4A and 4B are cross-sectional views showing a second embodiment of a packed composite tube girder according to the present invention.

<Explanation of Signs of Major Parts of Drawings>

10: composite pipe 12: connector

16: outer compound pipe 18: inner compound pipe

20: support plate 30: shear connector

70: bottom plate

Hereinafter, with reference to the accompanying drawings, a preferred embodiment of a packed composite tube girder using a polymer material according to the present invention will be described in detail.

1A to 1C are cross-sectional views showing a first embodiment of a packed composite tube girder using a polymer material according to the present invention. As shown in Figure 1a to 1c, in the first embodiment of the filling composite tube girder according to the present invention, the composite tube 10 is filled with concrete or fiber-reinforced composite material, and the composite tube 10 and the inside In order to maximize the synthesizing effect with the concrete 11 to facilitate the installation of the formwork during the construction of the plurality of connectors 12 and the upper bottom plate 70 integrally formed on the inner circumferential surface of the composite pipe 10 during the initial molding. The support plate 20 is installed in pairs on the upper outer peripheral surface in the longitudinal direction of the composite pipe 10 and between the support plate 20 is installed in the longitudinal direction of the steel pipe and the composite pipe 10 is the upper bottom plate 70 It is configured to include a plurality of shear connector 30 for connecting to.

The composite pipe 10 is composed of a circular tube using a general reinforcing material (inorganic fiber; carbon fiber, glass fiber, bronze fiber, or organic fiber; aramid fiber) and a binder (resin-based), such as irregularities on the inner peripheral surface during the rib Produced by forming. In addition, in order to further secure the integral behavior between the composite pipe 10 and the inner filler, by installing a plurality of internal diaphragms formed through holes at a predetermined interval inside the composite pipe, it is possible to increase the compounding effect by increasing the restraining effect of the internal concrete.

The inside of the composite pipe 10 is filled with concrete 11 (filled, lightweight, foam) or fiber-reinforced composite material of filling material 11 to increase the bending strength and rigidity by the mutual restraint effect of the filling material and the composite pipe and to reduce noise and vibration. Let's do it. In the case of the continuous bridge in filling the filling material 11, the composite pipe girders near the mid-point portion are filled with light lightweight concrete or fiber reinforced composite material, and the middle portion of the span is filled with air mortar to reduce the weight. Therefore, it acts as a composite girder of the composite pipe and the filling material in the constant moment region of the span center part.

In order to maximize the compounding action of the filling material 11 and the compound pipe 10, a plurality of uneven or rib connectors 12 are installed inside the compound pipe 10 to perform the compounding action of the compound pipe 10 and the filling material 11. Maximized. In this embodiment, as the connector 12, in the present embodiment, the composite tube is molded inside the tube at the time of initial manufacture, or a shear connector (stud, T-shaped, U-shaped, L-shaped) is manufactured on the inner circumferential surface of the composite tube using a carbon-based layered fiber composite material. And the like) are attached using an epoxy adhesive. The diaphragm, which is a diaphragm, is installed inside the composite pipe at regular intervals to increase the degree of restraint of the composite filling material.

Upper bottom plate 70 In order to facilitate the concrete pouring, the upper outer circumferential surface of the composite pipe 10 is attached to the support plate 20 in pairs in the longitudinal direction, and also manufactured as wide as the bottom plate so as to serve as a form of formwork. Make it available.

For shear connection with the upper bottom plate 70, a plurality of shear connection members 30 are installed on the upper surface in the longitudinal direction using an insert type, edge type or epoxy adhesive.

The upper bottom plate 70 is supported by the filling composite tube girder and bonded to the upper surface of the composite tube girder with a plurality of shear connecting members 30 in the longitudinal direction. As a result, the cross section of the entire upper bottom plate 70 and the entire packed composite tube girder can be effectively used for the tensile and compressive forces by connecting the filling composite tube girder and the upper bottom plate 70 to the total load.

As the shear connecting member 30 can be inserted into the composite pipe into the dowel bar using the steel as shown in Figure 2a, it is used as shown in Figures 2b and 2h shear connector 30 is a composite plate perforated plate , Curved, T-, L-, Z-shape, perforated composite plate 33, or torn apart during processing (34), so that the compounding effect with the upper floor plate effectively occurs, the surface of the composite plate is comb (32) to the projection 36 is provided, it is preferable to maximize the synthesizing effect with the floor concrete by installing the projection 35 on the flange.

In addition, as shown in FIGS. 3A to 3C, the connection method (structure) of the composite pipe 10 and the transfer connector 30 is attached with an epoxy-based adhesive 37 (3a) or a projection-type half wedge 38 (3b). To projection-shaped wedges (39) (3c) to be inserted and fitted.

Figure 4a shows a second embodiment of the filling composite tube girder according to the present invention, the outer composite tube 16, the inner composite tube 18 having an outer diameter smaller than the inner diameter of the outer composite tube 16, the outer composite tube 16 And a composite pipe 10 including a spacer 19 for maintaining a gap between the inner composite pipe 18 and a concrete or composite material 11 filled between the outer composite pipe 16 and the inner composite pipe 18. And, when the construction of the upper bottom plate 70 serves as a formwork and the support plate 20 installed in pairs on the upper outer peripheral surface in the longitudinal direction of the outer composite pipe 16, and the composite pipe 10 to the upper bottom plate 70 It is configured to include a plurality of shear connector 30 is installed on the upper outer peripheral surface of the outer composite tube 16 to connect to.

The inner circumferential surface of the outer composite pipe 16 or the outer circumferential surface of the inner composite pipe 18 is formed and cut during the production of the pipe to form convex and concave-convex shapes such as a sawtooth shape and a wavy pattern in the circumferential direction, the longitudinal direction of the pipe, and the spiral shape. It can increase the bonding strength and sliding resistance between the concrete and the composite or composite material can increase the synthetic action.

The spacer 19 is spaced apart at a predetermined interval between the inner composite pipe 18 and the outer composite pipe 16 at predetermined intervals in the longitudinal direction, and has a central opening of an inner diameter slightly larger than the outer diameter of the inner composite pipe. The steel plate of the square or circle formed with the divided and installed between the inner composite pipe 18 and the outer composite pipe (16). The number of the spacers 19 is determined by the shear force, and functions to maintain the gap between the outer composite tube 16 and the inner composite tube 18 and to ensure the integral composite behavior of the concrete or the composite filling material.

The diaphragm serving as a diaphragm may be additionally installed in the filling composite tube girder according to the second embodiment, and the specific configuration is the same as that of the filling composite tube girder according to the first embodiment.

Other specific configuration and connection structure of the support plate 20, the shear connector 30 is the same as the filling composite tube girder according to the first embodiment.

On the other hand, in order to increase the strength of the fiber reinforced composite material to concrete filled composite tube girder, as shown in Figure 4b by filling the inner composite pipe 18 also concrete or composite material 11 can be improved durability and usability as a girder. have.

Hereinafter will be described the action of the composite tube girder filled with concrete or composite material according to the present invention.

The present invention is designed to make full use of the advantages of layered composites and concrete or fiber reinforced composites. The local buckling prevention effect of the composite pipe by the material has excellent performance in terms of structural performance, such as strength and deformation capacity, and can increase the efficiency of the composite pipe because the strength increases significantly without increasing the cross section.

In addition, by maximizing the composite action of the composite pipe and the upper bottom concrete using the shear connection material 30 made of dowel bar or layered composite material, the shear surface of the upper bottom plate and the girder can be made effective, and the compressive force coming from the top Excellent structure against tensile force, crack, vibration and noise.

On the other hand, in the case of double composite pipe girders, when the inner composite pipe is not filled with concrete or composite material, wires, cables, pipes, etc. for various facilities may be disposed therein.

As described above, the present invention is expensive due to the increase in weight, which is a problem of general steel girder bridges, a number of stiffener reinforcement inserts, vibration and noise problems, workability problems in concrete girder bridges, and load increase due to overweight. It is composed by filling concrete inside the steel pipe to solve the problem, cracking problem due to the characteristics of concrete, and it is excellent in compressive strength, shear strength, bending strength, tensile strength, crack resistance, etc. It can replace the girder bridges that are used for highways, roads and railway bridges, and because the girder's height is not only small but also beautiful in appearance, it can be used in overbridge.

In addition, the service life of the bridge can be increased, as well as the production cost can be reduced and construction time can be shortened, which can greatly contribute to the reduction of construction cost.

Although the present invention has been described in connection with the above-mentioned preferred embodiments, it is possible to make various modifications or variations without departing from the spirit and scope of the invention. Therefore, the appended utility model registration claims will include any modifications or variations belonging to the subject matter of the present invention.

Claims (17)

A composite pipe 10 filled with concrete or fiber reinforced composite material therein; Support plate 20 installed in pairs on the upper outer peripheral surface in the longitudinal direction of the composite pipe 10 to facilitate the installation of the formwork during the construction of the upper bottom plate (70); And Filled composite pipe girder using a polymer composite material installed in the longitudinal direction of the steel pipe between the support plate 20 and comprises a plurality of shear connector 30 for connecting the composite pipe 10 to the upper bottom plate (70). The method of claim 1, The composite pipe (10) is filled composite tube girder using a polymer composite material, characterized in that made of fiber-reinforced plastic. The method of claim 1, Filled composite tube using a polymer composite material, characterized in that a plurality of connectors 12 are further installed on the inner circumferential surface of the composite tube 10 in order to maximize the composite action of the composite tube 10 and the concrete 11 filled therein Girder. The method of claim 3, wherein The connector 12 is a filler composite tube girder using a polymer composite material, characterized in that the projection formed integrally during the production of the composite tube (10). The method of claim 1, Filling composite tube girder using the polymer composite material, characterized in that the diaphragm diaphragm is further installed at a predetermined interval inside the composite tube (10). The method of claim 1, The shear connector 30 is a filler composite tube girder using a polymer composite material, characterized in that the dowel bar of the 'c' shape using steel. The method of claim 1, The shear connector 30 is made of a plate-shaped, curved, T-type, L-type, Z-type, perforated 33 composite plate or torn apart during processing (34) so that the composite effect with the upper bottom plate effectively occurs (34) , The surface of the composite plate is installed comb pattern 32 to the projection 36, the filling composite pipe girder using the polymer composite material, characterized in that the projection 35 is installed on the flange. The method of claim 1, The shear connector 30 is filled composite tube girder using a polymer composite material, characterized in that attached to the composite tube 10 and the epoxy-based adhesive. The method of claim 1, The shear connector 30 is formed of a projection half wedge (38) or projection wedge (39) formed by filling the composite composite tube girder using a polymer composite material, characterized in that fitted to the composite pipe (10). The outer compound pipe 16, the inner compound pipe 18 having an outer diameter smaller than the inner diameter of the outer compound pipe 16, the spacer 19 for maintaining the gap between the outer compound pipe 16 and the inner compound pipe 18 and the A composite pipe (10) comprising concrete or composite material (11) filled between the outer composite pipe (16) and the inner composite pipe (18); A support plate 20 which acts as a formwork during construction of the upper bottom plate 70 and is installed in pairs on the upper outer circumferential surface in the longitudinal direction of the outer composite pipe 16; And Filled composite pipe girder using a polymer composite material, characterized in that it comprises a plurality of shear connector 30 is installed on the upper outer peripheral surface of the outer composite pipe 16 to connect the composite pipe 10 to the upper bottom plate 70 . The method of claim 10, The inner circumferential surface of the outer composite tube 16 or the outer circumferential surface of the inner composite tube 18 is formed by forming and cutting during tube manufacturing to form irregularities such as a sawtooth shape and a wavy pattern in the circumferential direction, the longitudinal direction of the tube, and the spiral shape. Filled composite tube girder using a polymer composite material characterized in that. The method of claim 10, The spacer 19 is installed to be spaced apart at a predetermined interval between the inner composite pipe 18 and the outer composite pipe 16 at a predetermined interval in the longitudinal direction, the center opening of the inner diameter slightly larger than the outer diameter of the inner composite pipe Filled composite tube girder using a polymer composite material, characterized in that the formed square or circular steel sheet is divided between the inner composite pipe 18 and the outer composite pipe (16). The method of claim 10, The inner and outer composite pipe (18) (16) is filled composite tube girder using a polymer composite material, characterized in that made of fiber-reinforced plastic. The method of claim 10, The shear connector 30 is a filler composite tube girder using a polymer composite material, characterized in that the dowel bar of the 'c' shape using steel. The method of claim 10, The shear connector 30 is made of a plate-shaped, curved, T-type, L-type, Z-type, perforated 33 composite plate or torn apart during processing (34) so that the composite effect with the upper bottom plate effectively occurs (34) , The surface of the composite plate is installed comb pattern 32 to the projection 36, the filling composite pipe girder using the polymer composite material, characterized in that the projection 35 is installed on the flange. The method of claim 10, The shear connector 30 is filled composite tube girder using a polymer composite material, characterized in that attached to the composite tube 10 and the epoxy-based adhesive. The method of claim 10, The shear connector 30 is formed of a projection half wedge (38) or projection wedge (39) formed by filling the composite composite tube girder using a polymer composite material, characterized in that fitted to the composite pipe (10).