JP2001207597A - Connecting structure for roof structural body made of frp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connecting structure for roof structural bodies made of FRP capable of securing good sealing performance by reducing the relative deformation of the structural bodies when the plurality of roof structural bodies are connected to one another with the intervals required for construction accuracy therebetween, and of causing load such as wind load or horizontal force in an earthquake to be efficiently transferred to the lower structure. SOLUTION: In the connecting structure for the roof structural bodies made of FRP, an interval-adjusting member is inserted into a gap between the adjacent roof structural bodies at the connection between the structural bodies, and the structural bodies are connected together by fastening means passing through the opposite FRP skin layers of the bodies and the interval-adjusting member.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint structure for a roof structure made of FRP, and more particularly, to a large-sized roof having a large area formed by connecting a plurality of roof structures made of FRP to a base member such as a steel beam. The present invention relates to a joint structure of a roof structure made of FRP, which can be cross-linked to a large span without providing a roof.

[0002]

2. Description of the Related Art Buildings with a large living space, such as educational facilities and gymnasiums, are roofed with a roof structure using steel beams and steel plates or a plurality of prestressed concrete roofs without steel beams. Especially in the case of prestressed concrete roofs, the weight is heavy and the burden on the building as a whole is large, and individual roof structures may be erected independently. There is a problem that a seal at a joint between the bodies is broken and a rain leak occurs.

[0003]

The present inventor has previously proposed in Japanese Patent Application No. 10-294774 a FRP roof structure that does not require a steel beam as a base. Large area FR
In order to roof with a roof structure made of P, it is common to connect a plurality of roof structures, but from the viewpoint of the construction accuracy of the lower structure and the accuracy at the time of construction, the adjacent FRP roof structure It is necessary to provide some gap between them. In this state, when the FRP roof structures are simply joined to each other by bolts or the like, an excessive bending load is applied to the joining bolts due to a wind load or a horizontal force during an earthquake, and the FRP roof structure is formed.
A bending load is also applied to the RP skin layer, which causes a problem that the generated load cannot be efficiently passed to the lower structure. In addition, since the relative deformation between the connected FRP roof structures increases, the sealing performance of the joint between the FRP roof structures is affected, and in the worst case, there is a possibility that rain leaks.

[0004] Accordingly, an object of the present invention is to provide a good seal by suppressing relative deformation between FRP roof structures when connecting a plurality of FRP roof structures with a gap required for construction accuracy. It is an object of the present invention to provide a joint structure of a roof structure made of FRP, which can ensure performance and efficiently allow a load such as a wind load or a horizontal force at the time of an earthquake to flow to a lower structure.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the joint structure of the FRP roof structure according to the present invention comprises:
At the joint between RP roof structures, adjacent FR
A gap adjusting member is interposed in the gap between the P roof structures, and the two FRP roof structures are joined to each other by fastening means penetrating the opposing FRP skin layers of the both FRP roof structures and the gap adjusting member. It consists of what was done. That is, the gap adjusting member is connected to the adjacent FR.
It is sandwiched between the FRP skin layers of the roof structure made of P and fastened and joined by fastening means, for example, through bolts penetrating these.

In the above joint structure, in order to impart shear strength or the like to the fastening means of the FRP skin layer, the tensile elastic modulus of the FRP skin layer of the FRP roof structure at the joint portion is 1500 kg / mm ² and the strength is 20kg / m
It is preferably at least m ² .

The gap adjusting member can be formed as a member continuously extending in the longitudinal direction of the roof structure made of FRP.
The gap adjusting members may be intermittently arranged at predetermined intervals in the longitudinal direction of the FRP roof structure. In the case of the intermittent arrangement, it is possible to prevent a large increase in the weight of the entire roof member.

Further, the fastening means is disposed in a hole formed by hollowing out the FRP roof structure in the FRP roof structure, and the hole is filled with a filler after fastening by the fastening means. can do. For example, F
When the RP roof structure has a sandwich structure of an FRP skin layer arranged at intervals and a core material interposed therebetween, at a joint between adjacent FRP roof structures, A structure in which a portion other than the opposing FRP skin layer is hollowed out and a filler is filled in the hole after fastening by the fastening means, whereby the fastening means is appropriately sealed to the outside.

It is preferable that a gap between adjacent FRP roof structures is covered with a heat-resistant film at an upper end. In this case, the heat resistant film preferably extends over the entire length in the longitudinal direction of the roof structure made of FRP. By covering the bonding gap with the heat-resistant film, the flow of air to the outside is blocked, and the occurrence of inconvenience such as dew condensation due to a temperature difference between the outside and the inside can be prevented.

[0010] Preferably, the joint is covered with an FRP skirting from above. By covering with a sash, it is possible to more reliably prevent the joint from leaking rain, etc.
By using RP, it can be made lightweight and excellent in handleability. This FRP cap is divided into 1 per unit width.
With a structure having a rigidity of 500 kg · mm ² or more, the FRP can be provided with sufficient strength for the seal.
It is possible to favorably follow the deformation of the roof structure, and to maintain excellent sealing performance.

[0011] The FRP cap has an inner surface with a convex portion which comes into contact with the FRP roof structure, and the convex portion forms a caulking clearance with the outer surface of the FRP roof structure. Is preferable. With such a structure, predetermined caulking can be easily performed, so that more excellent sealing performance can be achieved.

Further, it is preferable that a lateral band extending between the upper surfaces of the adjacent FRP roof structures is fixed to the top of the gap adjusting member. Due to the presence of the horizontal band, the gap adjusting member is suspended through the horizontal band locked on the upper surface of the FRP roof structure in any state during and after construction. And the gap adjustment member can be prevented from falling even if the fastening means is broken.

[0013] In the joint structure of the FRP roof structure according to the present invention as described above, the opposing FRP skin layers of the adjacent FRP roof structures are connected to each other with a gap adjusting member interposed therebetween. Because it is connected by direct fastening means, it becomes possible to firmly join both FRP roof structures,
The FRP roof structures mutually restrain the deformation of the mating member, and the relative deformation between the two FRP roof structures is suppressed to a small value. As a result, good sealing performance is ensured at the joint, and thus over the entire roof.

The fastening means may extend from the FRP skin layer of the one FRP roof structure to the FRP skin layer of the other FRP roof structure through the gap adjusting member and penetrate therethrough. The length can be shorter than when extending from the outer surface side of the roof structure made of the other FRP to the outer surface side of the roof structure made of the other. As a result, a bending load or the like applied to the fastening means can be reduced, and an excessive bending load or the like can be appropriately prevented. Accordingly, breakage of the fastening means is appropriately prevented. Further, when the fastening means is tightened, the compression deformation of the FRP roof structure itself is easily prevented.

As described above, since the FRP roof structures are firmly joined to each other in a state where the relative deformation is suppressed while ensuring good sealing performance, loads such as wind loads applied to the roof and horizontal forces such as earthquakes are applied. Can efficiently flow into the lower structure.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. FIG. 1 and FIG.
1 shows a joint structure of an FRP roof structure according to an embodiment of the present invention. In the figure, 1 is F adjacent to each other.
3 shows a roof structure made of RP. As shown in FIG. 3, a plurality of FRP roof structures 1 are sequentially connected to each other to form a predetermined roof. FIGS. 1 and 2 show a joint 2 between adjacent FRP roof structures 1. Is shown.

In this embodiment, each FRP roof structure 1 has a U-shaped cross section. The FRP roof structure 1 includes front and back FRP skin layers 3 arranged at intervals.
And a core material 4 interposed between the two FRP skin layers 3, and an FRP rib (not shown) extending between the two FRP skin layers 3 is provided as necessary.

The reinforcing fibers and matrix resin of the FRP constituting the FRP skin layer 3 are not particularly limited, and any known ones can be used. For example, as a reinforcing fiber,
Carbon fiber, glass fiber, aramid fiber and the like can be used. As the matrix resin, various thermoplastic resins can be used in addition to thermosetting resins such as epoxy resin, phenol resin, unsaturated polyester resin and vinyl ester resin. Wood, a foam, a honeycomb body, or the like can be used as the core material 4, and a foam having a small specific gravity is more preferable from the viewpoint of lightness. In particular, by using such a core material 4, not only rigidity but also heat insulation and sound insulation can be improved.

In the joint 2, a gap 5 is formed between adjacent FRP roof structures 1, more specifically, between FRP skin layers 3 of the adjacent FRP roof structures 1 that face each other. A gap adjusting member 6 is interposed in the gap 5.

Although the material of the gap adjusting member 6 is not particularly limited, a material having high strength and rigidity to some extent is preferable because a hanging member such as a lighting fixture can be attached to the gap adjusting member 6. Moreover, so as not to collapse when fastening by fastening means which will be described later, preferably has a compressive strength of at least a certain level, such as compression modulus 2000 kg / mm ² or more, the compressive strength 20 kg / mm
^Two or more are preferred. As a material, steel materials such as steel and stainless steel, non-ferrous metals such as aluminium and copper, and FRP can be used. As the FRP, a thermosetting resin such as unsaturated polyester, vinyl ester, epoxy, or phenol; a thermoplastic resin such as ABS, nylon, or polycarbonate; a reinforcing fiber such as carbon fiber, glass fiber, or aramid fiber alone or a combination thereof; FRP reinforced by the above can be used.

The gap adjusting member 6 has a top portion as shown in FIG.
As shown in FIG. 2, a horizontal band 7 extending between the upper surfaces of adjacent FRP roof structures 1 is fixed. The horizontal band 7
A material different from the gap adjusting member 6 may be fixed to the gap adjusting member 6, or a material having the same material as the gap adjusting member 6 may be formed integrally with the gap adjusting member 6. Because of the presence of the horizontal band 7, the gap adjusting member 6 is suspended via the horizontal band 7 during construction, so that accidental dropping of the gap adjusting member 6 is prevented. Further, even after the installation, even if the fastening means is broken, the gap adjusting member 6 is prevented from dropping.

The gap adjusting member 6 interposed between the opposing FRP skin layers 3 extends between the FRP skin layers 3 and is fastened by fastening means 8 penetrating both the FRP skin layers 3 and the gap adjusting member 6. Fastened together with the layer 3 in a sandwich structure. In the present embodiment, the fastening means 8 is composed of a bolt 9, a nut 10, and washers 11, 12, but other known fastening means may be used.

The gap adjusting member 6 is a roof structure 1 made of FRP.
However, from the viewpoint of reducing the overall weight of the roof and improving the handling of the gap adjusting member 6, as shown in FIG. It is preferable to arrange them intermittently in one longitudinal direction.
The arrangement pitch may be determined as appropriate, for example, 400 mm
About 2000 mm. The stress generated in the roof structure made of FRP due to wind pressure and seismic force is high near the beam around the lower part where the roof is installed. Communication becomes possible.

FIG. 1 shows the completed state of the fastening by the fastening means 8, but before the construction (before the fastening), the easiness of the construction is secured, and the connection with other members (that is, the construction accuracy) is secured. Therefore, it is preferable that the gap between the opposing FRP skin layers 3 is slightly larger than the thickness of the gap adjusting member 6.
The difference (clearance) between the gap before fastening and the thickness of the gap adjusting member 6 is, for example, 1 to 7 mm, preferably 3 to 5 mm.
It should just be set to about. If the clearance is too small, the construction becomes difficult, and if it is too large, the bending load on the joining bolt 9 increases.

The thickness of the gap adjusting member 6 can be appropriately set according to the purpose of use. For example, when a hanging member such as a lighting fixture is mounted, the thickness is set to be large, and it is used only as a gap adjusting member. In that case, it may be thin. However, depending on the thickness of the gap adjusting member 6, the gap between the adjacent FRP roof structures 1 is desirably 10 to 30 mm, preferably about 15 to 25 mm. If the gap is smaller than this range, the workability deteriorates, and if the gap is larger than this range, the bending load on the joining bolt 9 increases.

The fastening means 8 includes the FRP skin layer 3 of one FRP roof structure 1 and the other FRP roof structure 1
And a gap adjusting member 6 interposed between the two FRP skin layers 3. Bolt 9
Extends through both the FRP skin layers 3 and the gap adjusting member 6, so that the through holes 6 a are formed in the gap adjusting member 6.
The skin layer 3 is provided with through holes 3a.
In order to secure shear strength after fastening around the through hole 3a formed in the FRP skin layer 3, F
The RP skin layer 3 has a tensile modulus of 1500 kg / mm ^2.
As described above, the strength is preferably 20 kg / mm ² or more.

The bearing strength (bearing strength) of the FRP skin layer 3 at the joint is 20 kg / mm ² or more, and the center position of the through hole 3a is at least four times the diameter of the terminal (see FIG. 2). e).
If the terminal distance is less than four times the hole diameter, the hole may be damaged or deformed depending on the applied load.

In the fastening portion by the fastening means 8, each F
The core material 4 of the RP roof structure 1 and the FRP skin layer on the opposite side (outer surface side of the roof material) to be fastened are hollowed out in a circular shape. Then, after fastening to the fastening means 8, the hollow portion is filled with the filler 13 to seal the fastening portion to the outside. The seal prevents rainwater or the like from entering from the outer surface side. As the filler 13,
For example, a foam can be used.

In this embodiment, the gap 5 between the adjacent FRP roof structures 1 in the joint 2 is covered with the heat-resistant film 14. The heat-resistant film 14 blocks the flow of air to the outside and prevents dew condensation due to a temperature difference between the outside and the inside. The position covered with the heat-resistant film may be only the position where the gap 5 is formed between the intermittently arranged gap adjusting members 6, but in reality, substantially includes the position where the gap adjusting member 6 exists. FRP
Covering over the entire length in the longitudinal direction of the roof structure 1 is easier to construct.

The joint 2 is formed of a FR having a U-shaped cross section from above.
It is covered with a P-shaped cap 15. FRP Kasagi 15 is F
Preferably, the RP roof structure 1 extends over the entire length. By being covered with the cap, the invasion of rainwater or the like is prevented, and the internal space of the cap is blocked from the outside, so that dew condensation or the like in the space is effectively prevented. Even if the cap 15 is torn, the presence of the heat-resistant film 14 prevents rainwater and dew condensation from entering the gap 5 between the FRP roof structures 1. By making the cap 15 made of FRP, it is possible to construct a light and easy-to-handle cap. Further, it is possible to elastically favorably follow the deformation and the like of the roof structure 1 made of FRP.

The FRP caps 15 having a U-shaped cross section abut and are fixed to the outer surfaces of the FRP roof structures 1 joined to each other on both sides. Therefore, although the mounting structure is capable of following the deformation and the like of each FRP roof structure 1, in order to favorably follow the deformation and the like while maintaining appropriate strength, the FRP shed 15 has a unit width. 15 per hit
It preferably has a rigidity of 00 kg · mm ² or more.

On the inner surface of the FRP skirting 15, a convex portion 16 is formed which is in contact with each FRP roof structure 1.
The FRP cap 15 is joined to the joining screw 17 at the convex portion 16 by F.
It is fixed to the outer surface of the RP roof structure. By providing the convex portion 16, a caulking clearance is formed between the protruding portion 16 and the outer surface of the roof structure made of FRP, and the caulking material 18 is filled, thereby sealing this portion.
Ensuring that the caulking clearance is ensured facilitates caulking, and it is possible to reliably prevent water or the like from entering the inside from this portion.

In the joint structure according to the present embodiment configured as described above, the adjacent FRP roof structures 1 are connected to each other via the gap adjusting member 6 and between the FRP roof structures 1. Since the FRP skin layers 3 are joined via the fastening means 8 so as to directly connect the opposite FRP skin layers 3, the members having high rigidity are directly fastened to each other. I do. In addition, each F
The RP roof structure 1 mutually restrains the deformation via each FRP skin layer 3 and the gap adjusting member 6,
Relative deformation can be kept small. As a result, a load such as a wind load applied to the roof or a horizontal force such as an earthquake is efficiently passed through the lower structure, and the durability of the roof itself is improved, while ensuring good sealing performance at the joint.

[0034]

As described above, the FR according to the present invention is used.
According to the joint structure of the roof structure made of P, when a plurality of roof structures made of FRP are connected to each other with a necessary gap for construction accuracy, the relative deformation between the roof structures made of FRP is suppressed to be small and good. In addition to ensuring good sealing performance, loads such as wind loads and horizontal forces in the event of an earthquake can be efficiently transmitted to the substructure.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a joint structure of an FRP roof structure according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of a joint of FIG.

FIG. 3 is a schematic partial longitudinal sectional view of a roof in which a plurality of FRP roof structures of FIG. 1 are connected.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 FRP roof structure 2 Joining part 3 FRP skin layer 3a Through hole formed in FRP skin layer 4 Core material 5 Gap 6 Gap adjusting member 6a Through hole formed in gap adjusting member 7 Horizontal band 8 Fastening means 9 Bolt DESCRIPTION OF SYMBOLS 10 Nut 11,12 Washer 13 Filler 14 Heat resistant film 15 FRP made Kasagi 16 Convex part 17 Screw 18 Caulking material

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI theme coat ゛ (Reference) B29L 31:10 B29L 31:10

Claims (9)

[Claims] At a joint portion between FRP roof structures, a gap adjusting member is interposed in a gap between adjacent FRP roof structures, and an FRP skin layer and a FRP skin layer facing each other of both FRP roof structures. A joint structure for an FRP roof structure, wherein the two FRP roof structures are joined by fastening means penetrating the gap adjusting member. 2. The tensile elastic modulus of the FRP skin layer of the FRP roof structure at the joint portion is 1500 kg / mm ^2.
The joining structure of the FRP roof structure according to claim 1, wherein the strength is 20 kg / mm ² or more. 3. The joint structure for an FRP roof structure according to claim 1, wherein the gap adjusting member is intermittently arranged in a longitudinal direction of the FRP roof structure. 4. The FRP roof structure, wherein the fastening means is disposed in a hole cut out of the FRP roof structure, and the hole is filled with a filler after fastening by the fastening means. Item FRP according to any one of Items 1 to 3
Joint structure of roof structure made of steel. 5. The joint structure for an FRP roof structure according to claim 1, wherein a gap between adjacent FRP roof structures is covered with a heat-resistant film at an upper end. 6. The FRP according to claim 1, wherein the joint is covered with an FRP capping tree from above.
Joint structure of roof structure made of steel. 7. A method according to claim 7, wherein said FRP cap is 150 pieces per unit width.
7. The FRP according to claim 6, having a rigidity of 0 kg · mm ² or more.
Joint structure of roof structure made of steel. 8. The FRP cap tree has a convex portion on its inner surface which comes into contact with the FRP roof structure.
The joint structure for an FRP roof structure according to claim 6 or 7, wherein a caulking clearance is formed between the FRP roof structure and an outer surface of the RP roof structure. 9. An adjacent F is provided on the top of the gap adjusting member.
The joint structure for an FRP roof structure according to any one of claims 1 to 8, wherein a horizontal band extending between upper surfaces of the RP roof structure is fixed.