KR20090108150A - Hybrid fiber reinforced polymer panel and temporary structure construction method using the same - Google Patents

Abstract

PURPOSE: A hybrid fiber reinforced polymer lining board and a temporary facility construction method using the same are provided to prevent the board from losing and to reduce a manufacturing cost by manufacturing the board with only fiber reinforced polymer material. CONSTITUTION: A substructure for a temporary bridge is established. The substructure for the temporary bridge includes a constructive bent and a mold. A reinforcing material(130a) with steel material is buried in a body. The body is segmented by an inside hollow(120) extending to the longitudinal direction of the fiber reinforced polymer lining board. The reinforcing material and the body are integrated. The hybrid fiber reinforced polymer lining board in which the section hardness of the lining board is increased is set up on top of the mold.

Description

HYBRID FIBER REINFORCED POLYMER PANEL AND TEMPORARY STRUCTURE CONSTRUCTION METHOD USING THE SAME}

The present invention relates to a hybrid fiber-reinforced polymer porous plate and a temporary construction method using the same. More specifically, the fiber-reinforced polymer is formed as a main material to form a cross-section of the perforated plate, the reinforcing material is inserted into the abdominal plate or the upper and lower flanges of the perforated plate by integrating with the fiber-reinforced polymer material to improve the rigidity and the construction of the facility using the same It is about a method.

In order to install temporary bridges or temporary facilities for traffic bypass, a substructure including a mold (usually an H-beam) is installed on piles installed by driving or intruding into the ground, and then temporarily reinforcing a rectangular parallelepiped steel plate on the substructure. Install multiple connections to temporarily communicate traffic. On the other hand, in the construction site of the subway is using the steel plate for drilling the road surface after excavation.

The standard (length x width x height) of the conventional steel porous plate is produced at 2,000 mm x 750 mm x 200 mm.

However, such a conventional steel cladding plate has a large self-weight, so heavy construction equipment must be mobilized for its transportation and installation, and thus, there is a need for technology development for a perforated plate made of a new material that can replace the steel cladding plate.

In response to this demand, the fiber-reinforced poly and the porous plate 10 have been developed, which is illustrated in FIG. 1A.

According to FIG. 1A, the hollow plate 10 is formed in a large hollow box shape, and it is understood that a plurality of hollows extend in the longitudinal direction.

In other words, it can be seen that such a perforated plate 10 has a body divided by the inner hollow 20 and the body is largely composed of an upper flange 11, a vertical abdomen 12 and a lower flange (13).

Furthermore, in the porous plate 10, as shown in FIG. 1B, a fiber-reinforced polymer porous plate having a wear layer having a wear layer 30 formed on the upper flange surface was also introduced.

That is, the upper surface of the perforated plate 10 made of a fiber-reinforced polymer as shown in FIG. 1A may cause slippage when not treated separately.

In order to prevent such slip phenomenon, when forming a non-slip means, for example, uneven surface in consideration of this when manufacturing the perforated plate, there is a problem in that the entire upper plate is worn over time to replace the relatively expensive perforated plate,

To provide a porous plate made of a fiber-reinforced polymer to which a variety of wear layer 30 is added to the upper surface of the porous plate made of a fiber-reinforced polymer separately,

The wear layer 30 can be freely replaced to enable the use of a more economical perforated plate made of fiber-reinforced polymer, and also to prevent the slip phenomenon by placing an uneven portion in the wear layer 30. will be.

In addition, a non-slip layer formed fiber reinforced polymer porous plate and a temporary bridge construction method using the same has also been introduced.

That is, the non-slip layer 40 is formed on the upper surface of the porous plate 10 made of a fiber-reinforced polymer separately as shown in FIG. 1c, but the non-slip layer can be freely replaced, so that the non-slip layer can serve as a packaging layer. It is.

In addition, according to Figure 1d, to install a temporary structure 50, a steel frame structure to support the perforated plate 10, and to mount the perforated plate 10 to be supported by the mold 60 to install the final temporary facility will be.

The fiber-reinforced polymer double-hole plate as described above is light in its own weight and has an internal hollow formed in the longitudinal direction, so it has a low self-weight compared with steel double-hole plate and has high rigidity and no worry of corrosion. It is easy to shorten the construction period of the perforated plate, and the noise generated when the vehicle passes through the upper part of the perforated plate has a merit of being very useful in the future.

The perforated plate made of such a fiber-reinforced polymer is made of glass fiber as a main material in consideration of economical efficiency.

However, the elastic modulus of the glass fiber reinforced polymer is about 30 to 50 GPa, and there is a problem in that sagging occurs largely when manufacturing the structure using the same.

That is, when designing the glass fiber-reinforced polymer porous plate, the design is governed by the deflection limit value rather than the material safety factor, so there is a problem in that it is inevitably designed in cross-sectional configuration.

Therefore, the necessity of the research and development to secure the economics by increasing the rigidity of the glass fiber reinforced polymer porous plate has emerged.

The present invention is to solve the problem of the porous plate made of the conventional fiber-reinforced polymer, the present invention can prevent the inefficient cross-sectional design due to the sag, such as by reinforcing the porous plate made of the fiber-reinforced polymer material, thereby The technical problem is to reduce the material cost in the production, and to make the construction of a more economical temporary facility by making the long space between the reinforced perforated plates possible.

In order to solve the above problems of the present invention

The present invention is characterized in that the reinforcing member is effectively inserted into the abdominal plate abdomen or the upper and lower flanges so as to enhance the structural characteristics, particularly when manufacturing the perforated plate made of glass fiber reinforced polymer.

At this time, the reinforcing material as a member having a function for increasing the rigidity of the glass fiber reinforced polymer, specifically to use a steel sheet or cable.

This is based on the principle that the steel sheet or cable is a steel material and the elastic modulus is larger than that of the glass fiber reinforced polymer, so that the rigidity of the glass fiber reinforced polymer integrated with the steel sheet or cable is increased, for example, the deflection is small, so that more effective cross-sectional design is possible.

As a result, it is possible to reduce the amount of glass fiber reinforced polymer that is relatively expensive and to reduce the number of molds in the temporary bridge substructure supporting the perforated plate by manufacturing and constructing the perforated plate having a larger length than the conventional perforated plate. Facility (bridge and road rehabilitation) construction was possible.

Hybrid fiber-reinforced polymer porous plate according to the present invention can be manufactured to be included in the body of the porous plate from the beginning in the production compared to the conventional fiber-reinforced polymer porous plate, it is economical production is possible because there is no increase factor of equipment,

Rigidity is increased by the reinforcing material can eliminate the cross-sectional increase factor for the manufacture of the perforated plate having the required cross-sectional rigidity, economical and efficient cross-sectional design is possible,

In addition, the perforated plate with increased cross-sectional stiffness by reinforcing material is advantageous in its deflection, and it is possible to design the cross-sectional plate between the long and long sections so that the construction of the economical temporary bridge due to the construction and construction of a small number of temporary bridge substructures is possible.

The actual design example is as follows.

The basic design conditions were applied to the standard truck load DB-24 with 1 bridge design and the load size was assumed to be 96 kN for the standard truck load DB-24, corresponding to the road bridge design standard 1 bridge. It is assumed that (rear wheels) are distributed evenly over the tire ground area. Constraints in determining the cross section assume that the deflection does not exceed L / 800 (where L is the span).

<Design Example 1>

Since the size of the perforated plate of Design Example 1 is advantageous in terms of applicability, it is advantageous to manufacture the same as that of a conventional steel perforated plate, and the width and height of the glass fiber reinforced polymer perforated plate are 750 mm and 200 mm, respectively, and the length of the perforated plate is The construction of more than 2,000 mm is advantageous in terms of the reduction of visible facilities, and the structural analysis was conducted for the 2.5 m section.

The cross-sectional shape that satisfies the relevant design conditions is to use the steel as a reinforcement as shown in Figure 2a, but the steel is formed in the abdomen of the upper flange, the abdomen and the lower flange constituting the body of the glass fiber reinforced polymer perforated plate including the steel sheet It was.

In this case, the cross-sectional area of the glass fiber reinforced polymer required when manufacturing only the glass fiber reinforced polymer is 41,104 mm 2, and when the plate-shaped reinforcement including the steel sheet is formed in the abdomen, the glass fiber reinforced polymer material may be reduced by about 17%. In addition, the cross-sectional specifications can also be reduced, it was found that it is possible to manufacture a thinner perforated plate.

Thickness (mm) Deflection (mm) FRP Fracture Index Steel maximum stress (MPa) FRP cross section (mm ² ) Steel cross section (mm ² ) Outer abdominal plate thickness (t _w2 ) (mm) Medial Abdominal Plate Thickness (t _w1 ) (mm) Flange Thickness (t _f ) (mm) Steel thickness (mm) 13 12 15 1.2 3.112 0.318 126.8 34,144 936 15 14 18 - 3.058 0.243 - 41,104 -

<Design Example 2>

The glass fiber reinforced polymer porous plate according to Design Example 2 uses steel as a reinforcing material, but the steel material is a linear reinforcing material having a predetermined diameter on the upper and lower flanges in the longitudinal direction of the porous plate to arrange the upper and lower flanges on the cable. It is to be reinforced by, which is shown in Figure 2c.

Table 2 shows the results of the structural design carried out to understand the advantages of the glass fiber reinforced polymer composite plates reinforced with cables.

In Table 2, the cable is assumed to be introduced 5mm steel wire, and when the number of cables to be reinforced is reduced, the use of glass fiber reinforced polymer is increased.

The lower two cases of the 2.5 m long perforated plate are described for this. If 54 steel wires are introduced, the flange thickness may be set to 15 mm and 25 steel wires may be set to 18 mm.

The material cost is largely divided into net material cost and production cost (including profits), assuming 2,100 won / kg and 1,400 won / kg, respectively, and when reinforcement using steel is applied, the net material cost and manufacturing cost of glass fiber reinforced polymer (including profit) Assuming that only steel material cost (assuming 750 won / kg) is included, the cost estimation results are shown as 1, where only glass fiber-reinforced polymer is applied for each perforated plate length. As a result of the relative cost estimation, it can be seen that the introduction of steel wire reduces the manufacturing cost by up to 18%.

Perforated plate length (m) Material composition Outer ventral thickness (mm) Medial ventral thickness (mm) Flange thickness (mm) Number of liners (mm) FRP cross section (mm ² ) Steel cross section (mm ² ) Relative Manufacturing Unit Price (KRW / EA) 2.0 FRP 13 12 15 - 35,080 - 1.00 FRP + steel wire 12 11 13 35 29,982 1,350 0.87 2.5 FRP 15 14 18 - 41,104 - 1.00 FRP + steel wire 13 12 15 54 32,980 2,100 0.82

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

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

2A to 2F illustrate embodiments of the hybrid fiber reinforced polymer porous plate according to the present invention.

According to FIG. 2A, the hybrid fiber reinforced polymer porous plate 100 according to the present invention also basically uses a glass fiber reinforced polymer porous plate 110 as the fiber reinforced polymer porous plate.

This is an economic consideration, and it is also possible to use other fiber-reinforced polymer porous plates such as carbon fibers.

The glass fiber reinforced polymer ventilated plate 110 is largely composed of the upper flange 111, the abdomen 112 and the lower flange 113, the inner hollow 120 is formed by extending a plurality in the longitudinal direction.

In this case, the name "hybrid" basically means that the reinforcement having a material having a larger elastic modulus than that of the fiber reinforced polymer is integrated with the fiber reinforced polymer and thus synthesized, thereby increasing the overall rigidity of the perforated plate.

For example, when the steel is used as the reinforcing material 130, the elastic modulus is about 200 GPa, and the elastic modulus is about 5 times larger than that of the glass fiber reinforced polymer. It can be seen that.

If the rigidity is increased, the perforated plate can be made slimmer, so that the economic efficiency due to the reduction in the cross-sectional area of the perforated plate can be secured, and if the same thickness can be made longer, the installation place of the temporary bridge undercarriage can be reduced. Economic construction of temporary bridges is possible.

Specifically,

In the case of FIG. 2A, a glass fiber reinforced polymer having an inner hollow 120 as a hybrid fiber-reinforced polymer porous plate and an example of using steel as a reinforcing material 130 in the porous hole 110 is shown.

At this time, the steel is to be formed extending in the longitudinal direction to at least one of the upper flange, the abdomen and the lower flange constituting the plate-shaped reinforcement including a steel sheet in the case of Figure 2a, each of the glass fiber reinforced poly and the porous plate 110 The case where the plate-shaped reinforcement is installed as the reinforcement 130a perpendicular to all of the abdomen 112 is shown.

The reinforcing member 130a may be integrally inserted into the glass fiber-reinforced polymer porous plate 110 and the reinforcing member 130a by manufacturing the glass fiber-reinforced polymer porous plate 110, in particular, when the reinforcing plate is manufactured when it is manufactured by drawing molding. .

According to FIG. 2B, the hybrid fiber reinforced polymer porous plate 100 according to the present invention also basically uses a glass fiber reinforced polymer porous plate 110 as the fiber reinforced polymer porous plate.

In addition, the glass fiber reinforced polymer porous plate 110 is composed of a large upper flange 111, the abdomen 112 and the lower flange 113, the inner hollow 120 is formed to extend a plurality in the longitudinal direction. .

The difference from FIG. 2a is that the reinforcing material 130a may be installed on the glass fiber reinforced poly as a reinforcing material and a part of the abdominal plate 110 rather than the entire abdomen 112.

That is, the installation position and the number of the reinforcement 130a is shown to be able to change as much.

According to Figure 2c, the hybrid fiber-reinforced polymer porous plate 100 according to the present invention is basically the same as that of Figure 2a and 2b to use a glass fiber-reinforced polymer porous plate 110 as a fiber-reinforced polymer porous plate,

In addition, the glass fiber reinforced polymer ventilated plate 110 is also largely composed of the upper flange 111, the abdomen 112 and the lower flange 113, the internal hollow 120 is formed to extend a plurality in the longitudinal direction. .

2a and 2b is different from the upper flange, the abdomen and the lower flange using the steel as a reinforcing material, but using the steel as a linear reinforcement (130b) including the cable, but also the body of the glass fiber reinforced polymer porous plate 110 It is to be formed to extend in at least one of the longitudinal direction.

Such a cable may simply use a steel wire or may use a stranded wire. In addition, the reinforcement member 130b, which is such a cable, is also pre-inserted when the double-walled plate is manufactured by using a pull-molding method among the manufacturing methods of the glass fiber-reinforced polymer double-layered plate 110. The glass fiber reinforced polymer ventilated plate 110 and the reinforcing material (130b) to be integrated.

At this time, the cable reinforcement (130b) can be seen that is formed in the upper flange 111 and the lower flange 113 of the glass fiber reinforced polymer ventilated plate 110, respectively, the number and spacing of the installation is changed according to the design Can be.

According to FIG. 2D, the hybrid fiber reinforced polymer porous plate 100 according to the present invention also basically uses a glass fiber reinforced polymer porous plate 110 as the fiber reinforced polymer porous plate.

In addition, the glass fiber reinforced polymer porous plate 110 is composed of a large upper flange 111, the abdomen 112 and the lower flange 113, the inner hollow 120 is formed to extend a plurality in the longitudinal direction. .

2c is that the reinforcement member 130b, which is a cable, is glass fiber reinforced poly, and the reinforcement member 130b, which is a cable, may be installed in the lower flange portion of the upper flange and the lower flange of the perforated plate 110.

In other words, the installation position and the number of the reinforcement member 130b, which is a cable, may be changed as much as possible.

According to FIG. 2E, the hybrid fiber reinforced polymer porous plate 100 according to the present invention is also basically the same as that of FIG. 2B and FIG. 2C.

In addition, the glass fiber reinforced polymer ventilated plate 110 is also largely composed of the upper flange 111, the abdomen 112 and the lower flange 113, the internal hollow 120 is formed to extend a plurality in the longitudinal direction. .

The difference from the above-described perforated plate is that the plate-shaped reinforcement (130a) including the steel plate as a reinforcing material and the linear reinforcement (130b) including the cable can be installed in combination.

That is, it is shown that the plate-shaped reinforcement (130a) to the lower portion 113 and the linear reinforcement (130b) to the abdomen 112 as the body of the glass fiber reinforced polymer double hole plate 110 can be installed in combination with each other reinforcement. will be.

According to FIG. 2F, the hybrid fiber reinforced polymer porous plate 100 according to the present invention also basically uses a glass fiber reinforced polymer porous plate 110 as the fiber reinforced polymer porous plate, as in FIG. 2E.

In addition, the glass fiber reinforced polymer porous plate 110 is composed of a large upper flange 111, the abdomen 112 and the lower flange 113, the inner hollow 120 is formed to extend a plurality in the longitudinal direction. .

2E is different from the glass fiber reinforced poly and the upper flange and the lower flange of the porous plate 110, the reinforcement member (130b) is installed cable, the abdomen 112 can be used for the plate-shaped reinforcement (130a).

That is, it has been shown that the installation position and the number of the plate-shaped reinforcement 130 and the cable reinforcement 140 can be changed any number.

FIG. 3 shows an installation state of the temporary bridge according to FIG. 2A (which can also be used for road rehabilitation as a temporary facility).

According to FIG. 3, first, in order to construct a temporary bridge, a vertical beam 210 which is usually H-shaped steel is installed, and then horizontal beams 220 which connect the vertical beams 210 to each other in a horizontal direction are installed. On the upper surfaces of the vertical beam 210 and the horizontal beam 220, the mold 230, which is also an H-beam, is installed.

At this time, the vertical beam 210, the horizontal beam 220 and the mold 230 to be referred to as the substructure 200 for the temporary bridge.

Accordingly, when a plurality of hybrid fiber-reinforced polymer porous plates 100 according to FIG. 2A are installed in the mold 230, construction of the final temporary bridge is completed.

In this case, the hybrid fiber-reinforced polymer double-porous plate 100 can be manufactured to have a length of about 2.5 m, that is, it can be installed in long intervals, so that the number of installation of the mold 230 can be reduced from four to three compared to FIG. 1C. It can be seen that the construction of the entire temporary installation can be made more economically.

In addition, the fiber-reinforced polymer multi-holster plate design standards of the present invention can be set to a custom standard for application to special purposes, such as a standard standard for replacing the normal multi-holster plate and a lightweight top plate for temporary equipment.

The standard can be manufactured in 1,990 mm x 200 mm x 750 mm (length x height x width) with the same dimensions as the normal perforated plate in order to easily replace the normal perforated plate.

One of the objectives of the present invention is to improve the applicability by diversifying the specifications of the perforated plate, and in particular, to increase the support length of the perforated plate to 2.5 m to reduce the visual facilities.

To this end, the perforated plate design specification of the present invention can be manufactured in the specification (length x height x width): 2,500 mm x 200 mm x 750 mm so that it can be applied to special purposes in addition to the standard specifications.

On the other hand, the FRP perforated plate of the present invention uses a composite material to fundamentally solve the problem of steel corrosion and welding fatigue, and the manufacturing method is applied to the drawing method can be said that there is no big restriction on the manufacturing length.

Therefore, the custom standard has the advantage that the manufacturing length can be adjusted according to the specifications of the temporary facility that requires the perforated plate.

However, the maximum production length is considered to be 12.0 m in consideration of the drawing process, the size and capacity of the drawing equipment, and the transportable length. The perforated plate, which is manufactured to custom specifications up to 12.0 m in length, can be applied to the subway construction site, but the composite perforated plate is lighter than the general perforated plate, so it is considered to be effective in reducing the visible facilities when applied to the upper part of the temporary facility. In particular, when the length of the fiber-reinforced polymer porous plate is manufactured to 12M, there is no longitudinal seam of the porous plate in the field, thereby improving the running performance of the vehicle.

4 illustrates this use example. Accordingly, it can be seen that the length of the fiber reinforced polymer perforated plate can be manufactured in accordance with the width of the temporary facility to be installed and installed in the temporary facility without the axial joint of the axial direction.

Specifically, as shown in FIG. 3, first, in order to construct a temporary bridge, a vertical beam 210, which is usually H-shaped steel, is installed, and then horizontal beams 220 are connected to each other in a horizontal direction. To install the mold 230, which is also H-shaped steel on the upper surfaces of the vertical beam 210 and the horizontal beam 220,

It can be seen that the perforated plate 100 according to the present invention can be installed according to the width of the temporary facility.

Thus, the perforated plate 100 can be seen that there is no joint formed in the middle can prevent the impact or rattling phenomenon on the vehicle passing thereon can be very usable.

1A, 1B, 1C and 1D show examples and constructional trials of conventional fiber reinforced polymer perforated plates.

2A, 2B, 2C, 2D, 2E and 2F show examples of hybrid fiber reinforced polymer porous plates according to the present invention.

Figure 3 shows a construction example of the hybrid fiber-reinforced polymer porous plate according to the present invention.

Figure 4 shows another construction example of the hybrid fiber-reinforced polymer porous plate according to the present invention.

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

100: hybrid fiber reinforced polymer double plate

110: glass fiber reinforced polymer double hole plate

111: Upper flange of the glass fiber reinforced polymer double plate

112: abdomen of the glass fiber reinforced polymer ventral plate

113: lower flange of the glass fiber reinforced polymer composite plate

120: inside hollow

130a, 130b: Reinforcement

200: substructure for temporary bridge

Claims (9)

In further forming a reinforcing material in the fiber-reinforced polymer porous plate, the porous plate, And a reinforcing material including steel in a body separated by an internal hollow extending in a longitudinal direction, thereby integrating the reinforcing material and the body to increase the cross-sectional rigidity of the perforated plate. The hybrid fiber reinforced polymer porous plate according to claim 1, wherein the reinforcing member extends in a longitudinal direction to at least one of the upper flange, the abdomen, and the lower flange of the plate-shaped reinforcement including a steel plate. According to claim 1, wherein the reinforcing material is a hybrid fiber reinforced polymer porous plate to extend in a longitudinal direction to at least one of the upper flange, the abdomen and the lower flange constituting the linear reinforcement comprising a cable. According to claim 1, wherein the reinforcing material is a hybrid fiber reinforced polymer porous plate to extend in the longitudinal direction to the upper flange, the abdomen and the lower flange constituting the body by combining a plate-shaped reinforcement including a steel plate and a linear reinforcement including a cable. According to claim 1, wherein the reinforcing material is a hybrid fiber reinforced polymer composite plate to be formed in advance in the body when manufacturing the porous plate. Install the substructure for temporary bridges including temporary vents and molds, The reinforcing member including the steel is further embedded in the body separated by the internal hollow extending in the longitudinal direction of the fiber reinforced polymer porous plate, so that the cross-section stiffness of the reinforcing plate is increased by integrating the reinforcing material and the body. A temporary construction method using a hybrid fiber-reinforced polymer perforated plate comprising the step of installing on the mold. According to claim 6, wherein the reinforcing material is a fiber reinforced polymer porous plate to extend in the longitudinal direction to at least one of the upper flange, the abdomen and the lower flange constituting the body of the linear reinforcement comprising a plate-like reinforcement or a cable including a steel sheet Temporary facility construction method. The method of claim 6, wherein the reinforcing material is a combination of a plate-shaped reinforcement including a steel plate and a linear reinforcement including a cable using a fiber-reinforced polymer porous plate to extend in the longitudinal direction to the upper flange, the abdomen and the lower flange constituting the body Construction method. A method of fabricating a fiber-reinforced polymer perforated plate in accordance with the width of a temporary facility and installing and constructing it in a temporary facility without joints at right angles.

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