JP2002227305A - Roof frame - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hardly deformable roof frame having a simple structure. SOLUTION: In this roof frame, a plurality of first arc-shaped structural long parts 6 curved upward are arranged in parallel at some intervals in its width direction from one end of a roof to the other end, while a plurality of second structural long parts 7 crossing the first structural long parts 6 at right angles or at right angles substantially on the roof surface are arranged in parallel at some intervals. In respective rectangular roof frameworks 8 each constructed of a pair of adjacent first structural long parts 6 and a pair of adjacent second structural long parts 7, at least the rectangular roof framework 8A positioned in the corner of the roof is provided with a brace 9 arranged on the diagonal line passing the roof angle among a pair of diagonal lines of the rectangular roof frameworks 8A positioned in the corners.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a structure in which a plurality of arc-shaped first structural elongated portions projecting upward from one end to the other end of a roof are spaced apart in the width direction of the first structural elongated portion. At the same time, it is perpendicular to the first structural long part on the roof surface,
Alternatively, the present invention relates to a roof frame in which a plurality of second structural elongated portions are arranged side by side at a distance in a substantially orthogonal state.

[0002]

2. Description of the Related Art In a building having a large space such as a gymnasium or a swimming pool, the roof of the building may be formed in a kamaboko shape.
As shown in FIG. 3, a lower structure B1 that supports the roof and a roof structure B2 that forms the roof are provided, and the roof structure B2 is installed on the lower structure B1 by roller support or the like. There is an advantage that the roof support load in the lower structure B1 can be simplified, and the lower structure B1 can have a simple structure. As a construction method of such a building, a lower structure B1 is formed first, and a temporary gantry 11 is provided in a large inner space portion, and a roof structure B2 is formed on the lower structure B1. In some cases, the roof frame B2 is temporarily received by the temporary rack 11, and after the roof structure B2 is completed, the temporary rack is removed. With the removal of the temporary gantry, the roof structure receives its own weight, and therefore tends to bend in the direction in which it expands in a plane. Forming the structure is preferable for reducing the mounting portion of the lower structure. Conventionally, as this kind of roof frame, as shown in FIG. 10, both ends of a roof structure B2 having a semi-cylindrical shape are connected by tension rods 20 to prevent the roof structure B2 from spreading ( For example, Japanese Patent No. 2,630,328
And Japanese Patent No. 2740874).
As a roof frame different from this, as shown in FIG. 5, in order to increase the rigidity of the roof structure, the first structural long part 6 and the second structural long part are obliquely crossed on the roof surface. 7 are arranged, and their contact points are configured to be rigid contact points (for example, see JP-A-2-300436).

[0003]

According to the former conventional roof frame, since the tension rods are exposed in the space below the roof structure, the interior space is restricted, and the construction space is restricted. However, there is a problem that the flexibility of the process is easily reduced. In addition, there is also a problem that the aesthetic appearance is easily deteriorated due to the exposure of the tension rod to the indoor space. On the other hand, according to the latter conventional roof frame, the first and second structural long portions, which are main structural members, are provided in a state of obliquely intersecting on the roof surface. There is a risk of twisting each structural long part. In particular, when the structural long part has a truss structure, the tendency is severe, and in order to prevent this, measures such as shifting the center of gravity of the truss upper and lower chord materials are required, and the production and processing are troublesome. Easy to hang. In the case where a plurality of short members are joined at the intersection of the two long structural portions as the structural long portions, the structure of the rigid contact points tends to be complicated.
As a result, there is a problem that the material cost and the assembly cost tend to be high.

Accordingly, it is an object of the present invention to provide a roof frame which can solve the above-mentioned problems and can provide a roof structure having a simple structure and a small bending.

[0005]

According to the first aspect of the present invention, as shown in FIGS. 2, 7, 8, and 9, the first structure has an arc-shaped first projecting upward from one end to the other end of the roof. A plurality of the elongated portions 6 are arranged side by side at intervals in the width direction of the first structural elongated portion 6, and are orthogonal to or substantially orthogonal to the first structural elongated portions 6 on the roof surface. In a roof frame in which a plurality of second structural elongate portions 7 are juxtaposed at intervals, a pair of adjacent first structural elongate portions 6 and a pair of adjacent second structural elongate portions 7 are provided. Of the rectangular roof frames 8 composed of the following, at least at the corner position rectangular roof frame 8A located at the roof corner, on the diagonal line that passes through the roof angle of the pair of diagonal lines of the corner position rectangular roof frame 8A. Where the brace 9 is provided.

According to the characteristic structure of the first aspect of the present invention, the temporary support of the temporary gantry with respect to the roof structure is released, and the structural elongate portion of the roof outer peripheral portion bears the tensile axial force. It is possible to efficiently bear the internal stress of the roof structure by each of the structural long portions and each brace, and it is possible to reduce the bending of the roof structure. In particular, the brace provided radially along the direction from the roof center side to the roof corner side can effectively bear the internal stress of the roof frame, and the action of the tensile axial force on each structural long part of the roof outer peripheral part. As a result, the horizontal displacement at the end of the roof structure and the vertical displacement at the center of the roof can be reduced to about 0.7 times as compared with a roof frame without a brace. And as the structure of the roof structure,
Unlike the former conventional roof frame, it is not necessary to use tension rods, so the interior space below the roof structure can be fully utilized, and the freedom in architectural planning is improved, and the roof structure is improved. Also, it is possible to prevent the indoor scene of the body from being lowered by the tension rod. In addition, compared to the latter conventional roof frame, the structure of the roof structure can be made extremely simple in the form of a parallel frame composed of the first structural long part, the second structural long part, and the brace. ,
Material costs and assembly costs can be reduced.

[0007] The characteristic structure of the invention of claim 2 is shown in FIG.
As exemplified in 8.9, the brace 9 is also provided to extend along the longitudinal direction of the brace 9 to another rectangular roof frame 8 adjacent to the brace 9 in the longitudinal direction.

[0008] According to the characteristic configuration of the second aspect of the invention, the operation and effect of the first aspect of the invention can be achieved in a more preferable state. That is, the braces separately provided on each of the rectangular roof frameworks are positioned along the material axis, and the stress transmission between them is
The displacement of the roof structure can be further suppressed by being performed without waste and without imposing an extra burden on other members.

A characteristic feature of the third aspect of the present invention is that, as exemplified in FIG. 2, the brace 9 extends so as to extend over a rectangular roof frame 8A at both corners located at diagonal sides of the roof. .

According to the characteristic configuration of the third aspect of the present invention, in addition to the effect of the first or second aspect of the present invention, the number of the braces can be minimized and the efficiency can be improved. A good roof displacement suppressing action can be exhibited. As a result, the amount of material used for the entire building,
In addition, the construction labor can be reduced, and the cost can be reduced.

Note that, as described above, reference numerals have been written for convenience of comparison with the drawings, but the present invention is not limited to the configuration shown in the accompanying drawings.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. In the drawings, portions denoted by the same reference numerals as those of the conventional example indicate the same or corresponding portions.

[First Embodiment] FIG. 1 shows an example of a building B employing a roof frame according to the present invention. The building B has a large space such as an indoor stadium and the like. It is formed in a kamaboko type. The building structure includes a lower structure B1 that supports the roof, and a roof structure B2 that forms the roof.

The lower structure B1 includes a lower body 1, an outer peripheral wall 2, a passenger seat 3, an arena 4, and a foundation 5, and the upper structure of the lower body 1 is provided with the roof structure B2. A supporting portion 1a for supporting the mounting is formed.

As described above, the roof structure B2 is formed as a semi-cylindrical roof, and as shown in FIG. 2, a first structural length having a circular arc shape protruding upward from one end to the other end of the roof. A plurality of long sections 6 are juxtaposed at intervals in the longitudinal direction of the building, and the second structural long sections 7 are orthogonal to or substantially orthogonal to the first structural long sections 6 on the roof surface. A plurality is arranged side by side in the building width direction at intervals. Therefore, a lattice is formed on the roof surface by the first structural long part 6 and the second structural long part 7. A rectangular frame composed of a pair of adjacent first structural long portions 6 and a pair of adjacent second structural long portions 7 is formed into a parallel frame (corresponding to a rectangular roof frame).
8, a number of parallel frames 8 are formed on the roof surface. Of the parallel frames 8, rectangular frames located at the four corners of the roof are referred to as corner-position parallel frames (corresponding to corner-position rectangular roof frames) 8A. The roof structure B2 of the present embodiment is configured such that the number of parallel frames 8 located on the short side and the long side of the roof is the same. And in each parallel frame 8 located on the diagonal of the roof,
A brace 9 is provided in a direction along the roof diagonal to stiffen the roof structure. That is, from the roof angle of the parallel frame 8A at one corner of the roof diagonal to the roof angle of the parallel frame 8A at the other corner of the roof diagonal, each brace 9 is arranged in a vertically continuous state, First structural long part 6
-Together with the second structural long part 7, the bending of the roof structure B2 can be suppressed by the stress load by these braces 9. Incidentally, a finishing material 10 for forming a roof surface is attached to the upper surface side of the roof structure B2 (see FIG. 1). Further, the outer peripheral portion of the roof structure B2 itself is supported by the support portion 1a of the lower structure B1. However, the lower structure B is assembled by assembling the roof structure B2.
Immediately after the roof structure B2 is supported by the roller 1, the roof structure B2 is fixed to the support portion 1a in a state where the bending of the roof structure B2 is settled down.

Further, the lower structure B1 and the roof structure B2 are not particularly limited in their architectural structures, and may be freely selected from, for example, steel structures, reinforced concrete structures, steel reinforced concrete structures, and the like. It is possible.

Next, the construction procedure will be described. [1] The lower structure B1 is formed. [2] A plurality of temporary mounts 11 for forming the roof structure B2 are formed at appropriate locations in the lower structure B1. [3] Each of the temporary mounts 11 and each of the support portions 1a
Over the first structural long part 6, the second structural long part 7,
The roof structure B2 is formed by assembling the braces 9 (see FIG. 3A). [4] The temporary gantry 11 is removed (see FIG. 3B). [5] With the horizontal / vertical displacement of the roof structure B2 settled down, the roof structure B2 is supported by the support portion 1a of the lower structure B1.
(See FIG. 3C).

Next, the horizontal displacement of the roof structure B2 described in the present embodiment and the roof structure shown in FIGS. The result obtained by analyzing the amount of vertical displacement to the side will be described. The roof structure shown in FIG. 4 has a configuration (hereinafter simply referred to as a first comparative example) in which only a parallel frame including a first structural long part 6 and a second structural long part 7 is provided.
In the roof structure shown in FIG. 1, the first structural long part 6 and the second structural long part 7 are arranged in a state of obliquely intersecting on the roof surface described as the prior art, and the mutual contact points are configured as rigid contact points. (Hereinafter, simply referred to as a second comparative example). In the analysis, the amount of flexure when each roof structure flexes due to its own weight immediately after removing the temporary mount of the roof structure is obtained.
The above result is as shown in FIG. 6, and according to the roof structure B2 described in the present embodiment, from the first comparative example,
The amount of deflection is small for both horizontal displacement and vertical displacement,
The amount of bending is suppressed to approximately the same level as in the second comparative example, which has a complicated structure and is likely to be expensive.

[Second Embodiment] The description of the configuration common to the first embodiment will be omitted, and different configurations will be mainly described. The roof frame of the embodiment is, as shown in FIG.
Parallel frames 8 located on the short side and long side of the roof, respectively
And the number of the parallel frames 8 on the long side is one less than the number of the parallel frames 8 on the short side. Accordingly, there are four columns of braces 9 whose one end is located at the roof angle. In the roof frame of the second embodiment, as in the previous embodiment, both the horizontal displacement and the vertical displacement of the roof structure B2 can be suppressed to be smaller than those of the first comparative example.

[Another Embodiment] Another embodiment will be described below.

<1> The roof frame is not limited to the one described in the above embodiment. For example, as shown in FIG. 8, a structure in which the brace 9 at the center of the roof is omitted,
When the building plane is long and thin, as shown in FIG. 9, a configuration in which the columns of the braces 9 whose ends are positioned diagonally to the roof do not intersect on the roof surface may be used. <2> The first structural long part 6, the second structural long part 7, and the brace 9 are not limited to the configuration of the single member described in the above embodiment, but may be, for example, a combination of a plurality of members. The formed truss structure may be used.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing a building according to an embodiment.

FIG. 2 is a conceptual perspective view showing a roof frame of the first embodiment.

FIG. 3 is an explanatory view showing a procedure for forming a roof frame.

FIG. 4 is a conceptual perspective view showing a roof frame of a first comparative example.

FIG. 5 is a conceptual perspective view showing a roof frame of a second comparative example.

FIG. 6 is a diagram showing an analysis result of a deflection amount of a roof frame.

FIG. 7 is a conceptual roof plan view showing a roof frame according to a second embodiment.

FIG. 8 is a conceptual roof plan view showing a roof frame according to another embodiment.

FIG. 9 is a conceptual diagram of a roof cover showing a roof frame of another embodiment.

FIG. 10 is a side sectional view showing a conventional roof frame.

[Explanation of symbols]

 6 First structural long part 7 Second structural long part 8 Rectangular roof framing 8A Corner position rectangular roof framing 9 Brace

Claims (3)

[Claims] 1. A plurality of arc-shaped first structural elongated portions projecting upward from one end to the other end of the roof are juxtaposed at intervals in the width direction of the first structural elongated portion. A roof frame in which a plurality of second structural elongate portions are orthogonally arranged on the roof surface, or substantially orthogonal to each of the first structural elongate portions, at intervals, and are adjacent to each other. Among the rectangular roof frameworks composed of the first structural long part and the pair of adjacent second structural long parts, at least the corner position rectangular roof frame located at the roof corner, the corner position rectangular roof A roof frame in which braces are provided on the diagonal line that passes through the roof angle of the pair of diagonal lines of the framework. 2. The roof frame according to claim 1, wherein the brace also extends along another longitudinal roof frame adjacent to the brace in the longitudinal direction along the longitudinal direction of the brace. 3. The roof frame according to claim 1, wherein the brace extends so as to extend over a rectangular roof framework at both corners located at a diagonal of the roof.