JP3895481B2 - FRP roof structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a roof structure made of FRP, and particularly to a roof structure made of FRP suitable for easily building a large roof or replacing it.
[0002]
[Prior art]
Currently, a roof of a building with a large roof space such as a gymnasium is usually built by a technique in which a haze is provided on a steel truss set and a steel plate is attached thereon. In addition, several decades ago, a precast concrete monolithic roofing material without truss was developed, and buildings using it have now reached the time of replacement.
[0003]
[Problems to be solved by the invention]
However, conventional roofing materials, especially precast concrete monolithic roofing materials, have a large weight per unit area and a large weight on the entire roof, and the load on the beams and columns is large. There is a possibility that the service life from the strength side as a result of lack.
[0004]
In addition, the large weight per unit area is a problem even when renewing roofing materials that have reached the end of their useful life or when they are new, requiring large heavy machinery or large scaffolds, and increasing the construction period. This causes problems such as increased costs.
[0005]
The problem of the present invention is that it is light and easy to handle, especially when a large roof is relocated or newly constructed, not only does it require large heavy machinery, but also the load on the beams and pillars of the building is small, and construction is extremely easy. In addition, an object of the present invention is to provide an FRP roof structure that can extend the service life significantly and is excellent in construction and performance.
[0006]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the FRP roof structure of the present invention has FRP layers arranged to face each other at intervals, ribs integrally joined to both FRP layers, and a unit width (1 mm). ) Ri der flexural rigidity 5 × 10 ⁷ kg · mm ² or more per extends substantially in the longitudinal direction at a constant width, the bending rigidity per unit width (1mm) in the longitudinal direction 5 × 10 ⁷ kg · mm ^{2 and} more, and a support portion for fixing to another member is provided at the end in the longitudinal direction . The distance between the opposed FRP layers is preferably in the range of 5 to 30 cm.
[0007]
Portions other than the ribs between the two FRP layers can be formed in a space, and a low specific gravity core material made of foam, wood, or the like can be disposed between the two FRP layers.
[0008]
In this FRP roof structure, it is preferable that a support portion for fixing to another member is provided at the end in the longitudinal direction, particularly at both ends. The support portion may be an FRP member formed integrally with the FRP layer of the FRP roof structure, or may be formed as a separate member and joined to the FRP roof structure, or a member made of other materials. You may comprise.
[0009]
FRP roofing structure is Ru extends longitudinally substantially constant width, in this case, it is preferable sectional shapes are substantially constant or uniform shape in the longitudinal direction.
[0010]
The cross-sectional shape of the FRP roof structure is not particularly limited, but as a typical cross-sectional shape, a flat plate shape, a V shape (including a U shape), a hat shape, a W shape, an inverted Y shape, a waveform, and the like can be adopted.
[0011]
Moreover, in order to provide the outstanding fire resistance and fire prevention performance, it is preferable that the FRP roof structure which concerns on this invention is provided with the fireproof layer in the surface.
[0012]
A plurality of such FRP roof structures can be connected to each other in the width direction to form a predetermined roof material. The FRP roofing structure, since the extending longitudinally substantially constant width, simply going to connected to the width direction can be easily formed roof of the desired area.
[0013]
In the case of connecting a plurality, a gap may be formed between adjacent FRP roof structures at the connecting portion. When the gap is provided in this way, assembly errors and thermal deformation (thermal expansion and contraction) are easily absorbed. In order to prevent rain leakage and the like, the connecting portion is preferably covered with a waterproof member (for example, a waterproof sheet-like member).
[0014]
In such a FRP roof structure according to the present invention, the bending rigidity per unit width (1 mm) is set to 5 × 10 ⁷ kg · mm ² or more, so that it is particularly per unit width (1 mm) in the longitudinal direction. Is set to 5 × 10 ⁷ kg · mm ² or more, thereby ensuring sufficiently high rigidity as a roof component. And because it is a roofing material mainly composed of FRP, the weight per unit area can be reduced to less than 1/2 of the conventional product, transportation and construction become easy, and the load on the building after construction is greatly increased. To be reduced. Moreover, since the entire roof can be significantly reduced in weight, it is possible to increase the span of columns and beams. In addition, large heavy machinery and large-scale scaffolding are not required, and the construction period is shortened and the construction cost is reduced. In addition, if the bending rigidity per unit width (1 mm) and the bending rigidity per unit width (1 mm) in the longitudinal direction are usually 20 × 10 ⁷ kg · mm ² or less, the objects and effects of the present invention are exhibited. Is enough.
[0015]
In addition, since it extends in the longitudinal direction with a substantially constant width, it can be easily connected especially in the width direction, and each FRP roof structure has a small size (width), but can be easily connected. It can be configured as a large roof. Therefore, it is possible to finally realize a large-sized roof having a desired shape and a large area while improving handling as a relatively small size FRP roof structure during transportation and construction. As a result, not only the new construction but also the work of changing the roof is greatly facilitated.
[0016]
Furthermore, since the outer surface is formed of FRP, there is basically no problem of rust generation and excellent corrosion resistance, so that the durability can be greatly improved and the service life can be greatly extended.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows an FRP roof structure according to an embodiment of the present invention. In FIG. 1, 1 indicates one FRP roof structure, and the FRP roof structure 1 has a U-shaped cross-sectional shape in this embodiment. The FRP roof structure 1 has FRP layers 2 arranged to face each other with a gap, and ribs 3 extending between both front and back FRP layers 2 and integrally joined to both FRP layers. The rib 3 can be made of a material different from that of the FRP layer 2, but it is preferable that the rib 3 is made of the same or the same type of FRP from the viewpoints of bondability and lightness. In the case where the rib 3 is made of a material different from that of the FRP layer 2, and in the case where the rib 3 is made of the same or the same type of FRP, the rib 3 is preferably disposed at a predetermined position by integral molding. In this embodiment, the portion without the rib 3 between the FRP layers 2 is formed in the space 4. The arrangement position, pitch, and the like of the rib 3 are determined so that the bending rigidity per unit width (1 mm) in the longitudinal direction of the FRP roof structure 1 is 6 × 10 ⁷ kg · mm ² .
[0018]
The FRP roof structure 1 has a substantially constant width W and extends in the longitudinal direction. In the present embodiment, the cross-sectional shape extends in the longitudinal direction while maintaining a constant or uniform cross-section, but the cross-sectional shape may vary somewhat as necessary as long as it has a substantially constant width W.
[0019]
The FRP reinforcing fiber and the matrix resin constituting the FRP layer 2 are not particularly limited, and any known one can be used. For example, carbon fiber, glass fiber, aramid fiber, etc. can be used as the reinforcing fiber, and various thermoplastics besides the thermosetting resin such as epoxy resin, phenol resin, unsaturated polyester resin, vinyl ester resin can be used as the matrix resin. Resin can also be used.
[0020]
FIG. 2 shows an FRP roof structure 6 having a sandwich structure in which the core material 5 is arranged (filled) in the space 4 portion of the form shown in FIG. As the core material 5, wood, foam, honeycomb, or the like can be used, and a foam having a small specific gravity is more preferable from the viewpoint of lightness. In particular, by using such a core material 5, not only rigidity but also heat insulation and sound insulation can be improved.
[0021]
FIG. 3 shows a V-shaped FRP roof structure 7 having a slightly different cross-sectional shape from that shown in FIGS. 1 and 2. In the present embodiment, support portions 8 for fixing to other members are provided at the longitudinal ends of the FRP roof structure 7, particularly at both ends. The support 8 may be molded separately and bonded to the FRP roof structure 7 by adhesion or the like, or may be molded integrally with the FRP layer of the FRP roof structure 7. In particular, by integrally molding, the main body of the FRP roof structure 7 is firmly joined, and as a whole, a structure having high strength and rigidity can be configured. The support portion 8 may be additionally provided as necessary, particularly when the FRP roof structure is long in the longitudinal direction.
[0022]
A plurality of FRP roof structures as described above can be connected in the width direction. Since the individual FRP roof structures are formed with a substantially constant width, they can be easily formed into a roof material having a desired area simply by connecting them one after another in the width direction.
[0023]
For example, as shown in FIG. 4, the FRP roof structures 1 adjacent to each other can be connected to each other with a predetermined gap 11 through an appropriate fastening member 12 (for example, a bolt). By forming such a gap 11, the FRP roof structure 1 has individual dimensional errors, assembling errors, and thermal deformation such as thermal expansion and contraction of the roof due to the presence or absence of solar radiation. Can be absorbed easily.
[0024]
For example, as shown in FIG. 5, the connecting portion 13 as described above is covered with a waterproof member 14 made of a waterproof sheet material or the like, so that a waterproof structure can be easily realized and rain leakage or the like is easily prevented. The
[0025]
Moreover, in each said embodiment, although the cross-sectional shape showed the F-shaped roof structure made from U shape or V shape, arbitrary shapes can be employ | adopted substantially freely as a cross-sectional shape. For example, a flat plate-shaped FRP roof structure 21 as shown in FIG. 6A, a hat-shaped FRP roof structure 22 as shown in FIG. 6B, and a W-shaped FRP as shown in FIG. A roof structure 23 made of FRP, an inverted Y-shaped FRP roof structure 24 as shown in (D), and a corrugated FRP roof structure 25 as shown in (E) can be obtained.
[0026]
Furthermore, in order to further improve the suitability as a roofing material and enhance the fire resistance, it is preferable to provide a fire resistant layer 32 on the surface (one side or both sides) of the FRP roof structure 31 as shown in FIG. 7, for example. . As the refractory material constituting the refractory layer 32, a fireproof paint or a foamable fireproof plastic material can be used. The foamable refractory plastic material is foamed and exhibits heat insulation performance when heated to a predetermined temperature.
[0027]
In the FRP roof structure according to the present invention having the above-described configuration, first, since it is a configuration mainly composed of FRP, the weight per unit area is significantly 1/2 to 1/3 that of the conventional product. Since it is reduced, it is easy to transport and does not require a large heavy machine or a large scaffold for construction, shortening the construction period and significantly reducing the construction cost. Further, a predetermined number of FRP roof structures having a certain width can be easily connected, a desired large-area roof can be easily formed, and the weight of the entire roof can be greatly reduced. Therefore, the load on the beams and pillars of the building is reduced, the size of these beams and pillars can be reduced, and the span can be expanded, which saves material costs and increases the freedom of design. .
[0028]
Further, if the sandwich structure as shown in FIG. 2 is adopted, it is possible to further increase the strength and rigidity while maintaining the light weight, and it is possible to further expand the span of the beam and the column. In addition, the sandwich structure can improve heat insulation and barrier properties.
[0029]
Further, since it is a roof material mainly composed of the FRP layer, it is excellent in durability, and there is essentially no risk of rust generation or decay, so that the service life is extended and the service life can be greatly extended.
[0030]
In addition, if a connecting structure as shown in FIG. 4 is adopted, a predetermined number of FRP roof structures can be easily connected, and assembly errors and thermal deformation can be easily absorbed, and construction is easier. And durability can be improved. Further, if a waterproof structure as shown in FIG. 5 is adopted, it can be completely treated against rain leakage and the like.
[0031]
Further, by integrally forming the support portion 8 as shown in FIG. 3, it is possible to facilitate engagement with other members and attachment to other members during construction. Further, it is not necessary to reinforce the installation portion of the support portion 8 with a special reinforcing fiber.
[0032]
Moreover, the roof material which has the outstanding fireproof performance is realizable by providing the fireproof layer 32 as shown in FIG.
[0033]
Furthermore, as exemplified by various cross-sectional shapes in FIG. 6, cross-sectional shapes such as a hat shape, a W shape, an inverted Y shape, and a corrugated shape can be adopted in addition to a V shape and a U shape, and these cross sectional shapes are adopted. By doing so, the sound generated inside the building cancels out the reflected sound from the roof member, and a quiet living space can be obtained.
[0034]
【The invention's effect】
As described above, according to the FRP roof structure of the present invention, since the FRP roof structure has ribs and the bending rigidity is a specific value or more, it is lightweight while ensuring sufficient strength and rigidity. Excellent workability, easy construction, short construction period, low load on the building, desired large-area roof can be easily constructed and replaced, and construction life and performance are long-lived Both can provide excellent roofing materials. In particular, these effects can be further promoted by providing an FRP roof structure having a constant width and extending in the longitudinal direction and having a bending stiffness in the longitudinal direction equal to or greater than a specific value.
[0035]
In addition, the FRP roof structure adopts a sandwich structure including a core material, adopts a specific structure at the connecting part between FRP roof structures, or adopts a structure with a fireproof layer on the surface If it does, the roof material of the further superior performance is realizable.
[Brief description of the drawings]
FIG. 1 is a partial perspective view of an FRP roof structure according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view of an FRP roof structure according to another embodiment of the present invention.
FIG. 3 is a perspective view of an FRP roof structure according to still another embodiment of the present invention.
FIG. 4 is a cross-sectional view showing an example of a connection structure between FRP roof structures.
FIG. 5 is a cross-sectional view showing another structural example of the connecting portion.
FIG. 6 is a schematic cross-sectional view showing examples of various cross-sectional shapes.
FIG. 7 is a cross-sectional view showing an example in which a refractory layer is provided.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1, 6, 7, 21, 22, 23, 24, 25, 31 FRP roof structure 2 FRP layer 3 Rib 4 Space 5 Core material 8 Support part 11 Gap 12 Fastening member 13 Connection part 14 Waterproof member 32 Fireproof layer

Claims (7)

And the FRP layer disposed opposite with a gap, and a rib that is both FRP layer and integrally joined, and state, and are bending rigidity per unit width (1mm) is 5 × 10 ⁷ kg · mm ² or more , Extending in the longitudinal direction with a substantially constant width, the bending rigidity per unit width (1 mm) in the longitudinal direction is 5 × 10 ⁷ kg · mm ² or more, and fixed to other members at the longitudinal end An FRP roof structure characterized in that a supporting part is provided . 2. The FRP roof structure according to claim 1 , wherein a core material is disposed between both FRP layers . The FRP roof structure according to claim 1 or 2, wherein the cross-sectional shape is any one of a flat plate shape, a V shape, a hat shape, a W shape, an inverted Y shape, and a corrugated shape . The FRP roof structure according to any one of claims 1 to 3 , wherein a fireproof layer is provided on the surface . The FRP roof structure according to any one of claims 1 to 3, wherein a plurality of roof structures are connected in the width direction . 6. The FRP roof structure according to claim 5, wherein a gap is formed between adjacent FRP roof structures in the connecting portion . The FRP roof structure according to claim 5 or 6, wherein the connecting portion is covered with a waterproof member .

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