JP2022109759A - roof structure - Google Patents

Abstract

To provide a roof structure capable of easily securing an effective space below a roof body.SOLUTION: A roof structure comprises: a roof body 10 inclined to both sides of a top part (a ridge line 10E); a support pole 20 supporting the roof body 10; and a plurality of tension materials 40 stretched from an upper end of the support pole 20 to a plurality of parts of a tip of the roof body 20.SELECTED DRAWING: Figure 2

Description

The present invention relates to roof construction.

Patent Literature 1 below discloses a roof beam reinforcing structure that reinforces mountain-shaped roof beams and tie bars stretched over the roof beams.

JP 2014-122465 A

As in the roof beam reinforcement structure of Patent Document 1, in a roof structure in which tie bars, which are tension members, are bridged between the tips of the roof beams, the tie bars cross the space, so the effective space below the roof body is Limited to below tie bars.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a roof structure that facilitates securing an effective space below the roof body.

The roof structure of claim 1 comprises a roof body inclined to both sides of a top portion, support columns supporting the roof body, and a plurality of roof columns extending from the upper end of the support columns to a plurality of points at the tip of the roof body. tension members; and

In the roof structure of claim 1, the roof body slopes to both sides of the top. For this reason, the roof main body is subjected to a thrust force due to its own weight and load, and the roof main body tends to open outward.

Here, in this roof structure, a plurality of tension members are laid across from the upper ends of the support columns that support the roof body to a plurality of points at the tip of the roof body. Therefore, the thrust force acting on the roof main body is handled by the tensile member bearing the tensile force.

As a result, it is not necessary to provide a tie bar or the like for connecting the leading ends of the roof bodies. Therefore, it is easy to secure an effective space under the roof body.

The roof structure according to claim 2 is the roof structure according to claim 1, wherein the support columns are provided at two portions of the roof main body near the gable surface, and between the upper ends of the support columns, , compression material is bridged.

In the roof structure of claim 2, two support columns are provided. Therefore, the tensile force acting on the support column from the tensile member can be dispersed. This makes it possible to reduce the size of the support column.

Also, the two support columns are provided at the ends of the roof body, respectively. For this reason, the upper end of each support column is pulled toward the central portion of the roof body by the tension member, that is, in a direction in which the upper ends of each support column approach. However, since the compression member is bridged between the upper ends of the support columns, the tensile force acting on the upper ends of the support columns can be resisted.

The roof structure of claim 3 is the roof structure of claim 1 or claim 2, wherein the tension member includes bundle members protruding downward from the roof body and lower chords connected to lower ends of the bundle members. It is provided with a material and has a convex shape on the lower side.

In the roof structure according to claim 3, the tension member has a downward convex shape with bundle members and lower chord members. As a result, a tensile force due to the bending of the beam also acts on the lower chord beam of the tensile member. Therefore, the thrust force can be efficiently processed.

According to the present invention, it is possible to provide a roof structure that facilitates securing an effective space below the roof body.

1 is an exploded perspective view showing a roof structure according to an embodiment of the invention; FIG. 1 is a perspective view showing a roof structure according to an embodiment of the invention; FIG. 1 is an elevation cross-sectional view showing a roof structure according to an embodiment of the present invention; FIG. FIG. 5 is an elevation cross-sectional view showing a modification of tie bars in the roof structure according to the embodiment of the present invention; (A) is a perspective view showing a modification in which support columns are arranged near the end of the roof body in the roof structure according to the embodiment of the present invention; It is a perspective view which shows the modification formed with the book, (C) is a perspective view which shows the modification which has arrange|positioned the support column in places other than the location below the ridgeline of a roof main body. (A) is a perspective view showing a modification in which the roof body is supported by constructing walls in the roof structure according to the embodiment of the present invention, and (B) is a modification using backstays instead of struts. (C) is a perspective view showing a modification in which the roof body is formed in a half-cylinder shape.

Hereinafter, a roof structure according to an embodiment of the present invention will be described with reference to the drawings. Components shown using the same reference numerals in each drawing mean the same components. However, unless otherwise specified in the specification, each component is not limited to one, and a plurality of components may exist. In addition, descriptions of configurations and reference numerals that are duplicated in each drawing may be omitted. It should be noted that the present invention is not limited to the following embodiments, and can be carried out with appropriate modifications, such as omitting the configuration or replacing with a different configuration, within the scope of the purpose of the present invention.

The directions indicated by arrows X and Y in each figure are directions along the horizontal plane and are orthogonal to each other. Also, the direction indicated by the arrow Z is the direction along the vertical direction (vertical direction). It is assumed that the directions indicated by arrows X, Y, and Z in each figure match each other.

<Roof structure>
As shown in the exploded perspective view of FIG. 1, a roof structure according to an embodiment of the present invention is formed with a roof body 10, support columns 20, struts 30 and tie bars 40. As shown in FIG.

(roof body)
The roof main body 10 is a roof (a so-called gable roof) having two flat surfaces that slope downward from a ridgeline 10E along the Y direction to both sides in a direction perpendicular to the ridgeline 10E (X direction). The roof body 10 is formed using truss beams 12 along the X direction in order to reduce the number of pillars in the X direction. Also, the truss beams 12 that are adjacent to each other in the Y direction are connected by a connecting beam 14 . Furthermore, a brace 16 spans the rectangular structural surface surrounded by the truss beams 12 and the connecting beams 14 .

(support column)
The support columns 20 are structural members arranged at both ends (so-called end surfaces) in the Y direction below the ridgeline 10</b>E of the roof body 10 and support the load of the roof body 10 . As the support column 20, various structural forms such as steel frame, reinforced concrete, and steel reinforced concrete can be applied.

The pillars that support the load of the roof body 10 are not limited to these two support pillars 20. For example, like the pillar 20A indicated by the dashed line, it can be appropriately arranged below the roof body 10. can. In the present embodiment, the support pillar 20 is the outermost pillar in the Y direction among the pillars that support the roof body 10 below the ridgeline 10E.

(strut)
The strut 30 is a beam that spans between the upper ends of the support columns 20 . A tensile force T acts on the support column 20 from a tie bar 40 which will be described later. As a result, the upper ends of the two support columns 20 try to move toward each other. As a result, a compressive force C from the support column 20 acts on the strut 30 . The struts 30 function as compressive members that resist this compressive force C.

As an example, the strut 30 is formed using H-section steel. In order to suppress buckling due to the compressive force C, the strut 30 may be formed of a steel pipe, or the H-section steel strut 30 may be surrounded by a steel pipe. can be stiffened. Also, the struts 30 are preferably formed using steel reinforced concrete or the like.

Note that if another pillar (e.g., pillar 20A) that supports the roof body 10 is arranged between the support pillars 20, the strut 30 can be connected to this pillar 20A. The pillars 20A arranged between the support pillars 20 may be studs.

(tie bar)
As shown in FIGS. 2 and 3 , the tie bars 40 are tension members that extend from the upper ends of the support columns 20 to a plurality of locations at the tip of the roof body 10 at an angle. Various steel materials such as PC steel bars, wires, H-shaped steel, T-shaped steel, channel materials, and angle materials can be used as the tie bar 40 . 2, 5 and 6, the illustration of the roof body 10 is simplified in order to make the arrangement of the tie bars 40 easier to understand.

Here, the “upper end portion” of the support column 20 is a portion included in a range (1/3) of the length of the support column 20 from the upper end of the support column 20, and at least , the portion higher than the height H1 of the tip of the roof body 10. As shown in FIG. Also, the "upper end portion" is preferably a portion included in the upper half range E1 of the vertical dimension H2 of the roof (the dimension in the Z direction from the tip of the roof body 10 to the ridgeline 10E of the roof body 10). It's about.

Also, the "tip" of the roof body 10 refers to the tip of the roof body 10 in the X direction, but does not necessarily refer to the "most tip" of the roof body 10 in the X direction, and includes the entire eaves portion. This “eaves portion” includes, for example, a range E2 from the centerline of the outermost pillar 20B provided below the roof body 10 in the X direction or the outer wall to the tip of the roof body 10 in the X direction. The pillar 20B is a pillar that supports the vertical force acting from the roof body 10. As shown in FIG. The pillar 20B may be provided at the bottom of the most extreme point of the roof body 10 (that is, a configuration without eaves).

In addition, "multiple points" at the tip of the roof body 10 refer to multiple points along the Y direction at the tip of the roof body, as shown in FIG. In this embodiment, the tie bars 40 extend from the upper ends of the respective support columns 20 to three points (three points on one side in the X direction and six points on both sides) of the roof main body. The number is not particularly limited.

Here, at least one of the tie bars 40 extending from each support column 20 is preferably bridged at a position close to the center in the Y direction (the position indicated by the center line CLY) at the tip of the roof body 10. . “A position near the center” is a range included in approximately 1/3 of the center of the span of the support column 20 .

The thrust force at positions “other than” near the center of the roof body 10, that is, at positions near the ends, is transmitted to the structural framework (not shown) near the gable surface via horizontal braces (brace 16) forming the roof body. be. Therefore, the thrust force generated at a position near the center is greater than the thrust force generated at other portions.

As shown in FIG. 3, tie bars 40 extend from each support column 20 to both sides in the X direction. As a result, the tensile force T acting on the support column 20 in the X direction is canceled, and deformation or movement of the support column 20 in the X direction is suppressed.

<Action and effect>
In the roof structure according to the embodiment of the present invention, as shown in FIG. 3, the roof body 10 is inclined to both sides of the top (ridgeline 10E). Therefore, the roof body 10 is subjected to a thrust force F due to its own weight and load, and the roof body 10 tries to open outward.

Here, in this roof structure, as shown in FIG. 2, a plurality of tie bars 40 as tension members are provided from the upper end of the support column 20 that supports the top of the roof body 10 to a plurality of locations at the tip of the roof body 10. It is bridged. Therefore, as shown in FIG. 3 , the thrust force F acting on the roof body 10 is handled by bearing the tensile force T by the tie bars 40 .

As a result, there is no need to provide a tie bar that connects the front ends of the roof body 10, that is, the tie bar 100 or the like, which is a comparative example and is indicated by a chain double-dashed line in FIG. Therefore, it is easy to secure an effective space below the roof body 10 .

Moreover, in the roof structure according to the embodiment of the present invention, two support columns 20 are provided as shown in FIG. Therefore, the tensile force T acting on the support column 20 from the tie bar 40 can be dispersed. As a result, the dimension of each supporting column 20 can be reduced.

Also, the two support columns 20 are provided at both ends of the roof body 10 in the Y direction. Therefore, the upper ends of the respective support columns 20 are pulled by the tie bars 40 toward the central portion of the roof body 10, that is, in a direction in which the respective upper ends approach.

However, since the strut 30, which is a compression member, is bridged between the upper ends of the support columns 20, the tensile force T acting on the upper ends of the support columns 20, that is, the compressive force C acting between the support columns 20 is reduced. can resist.

<Modification>
(Modification of tie bar)
In the above embodiment, the tie bar 40 extends from the upper end of the support column 20 to the tip of the roof body 10, but the embodiment of the present invention is not limited to this. For example, instead of this tie bar 40, a string beam 50 shown in FIG. 4 may be provided.

The tension string beam 50 includes bundles 52 protruding downward from the roof body 10 and lower chords 54 connected to the lower ends of the bundles 52, and has a downwardly convex shape. The lower chord member 54 spans from the upper end of the support column 20 to the tip of the roof body 10 .

With this configuration, tensile force is generated in the lower chord member 54 due to deformation of the roof body 10 when a load is applied to the roof body 10 . This tensile force can resist thrust forces. It should be noted that the tensile force PT may be introduced in advance to the lower chord members 54 at the stage of assembling the tensioned chord beams 50 .

(Modified example of support column)
In the above embodiment, the two support columns 20 are arranged at both ends of the roof body 10 in the Y direction and below the ridge line 10E, but the embodiment of the present invention is not limited to this.

For example, like the support columns 22 shown in FIG. 5A, the support columns according to the present invention can be arranged near both ends of the roof body 10 in the Y direction (positions closer to the end surface).

Here, “near” both ends means a portion included in a range E3 within about (0.25 W) from the ends in the Y direction, where W is the dimension of the roof body 10 in the Y direction. It's about. By arranging the support pillars 20 in this range E3, the support pillars can support the roof body 10 stably.

Also, for example, like the support column 24 shown in FIG. 5B, only one support column (the support column over which the tie bar 40 is spanned) may be provided. In this case, the tie bars 40 extend from the support column 24 to both sides in the Y direction and both sides in the X direction. This distributes the directions of the tensile force acting from the tie bars 40 on the support posts 24 . Also, a configuration in which the strut 30 is not provided can be employed.

Furthermore, two supporting columns may be provided at a portion other than below the ridgeline 10E in the X direction, like the supporting columns 26 shown in FIG. 5(C), for example. In this case, a tie bar 40 is bridged from the upper end of each support column 26 to one end of the roof body 10 in the X direction.

Further, in this case, in addition to the struts 32 that span the upper ends of the support columns 26 along the Y direction, it is preferable to provide struts 34 that span the X direction. The struts 34 may be replaced by walls formed between the support columns 26 adjacent in the X direction, for example. Thereby, it is possible to suppress the deformation or movement of the support columns 26 adjacent to each other in the X direction in directions away from each other.

(Other modifications)
In the above embodiment, the roof body 10 is supported by two support columns 20 or other columns including two support columns, but the support structure for the roof body 10 is not limited to this.

For example, as shown in FIG. 6A, a wall 60 may be arranged on the gable surface of the roof body 10 on which the support pillars 20 are installed.

Further, in the above embodiment, the tensile force T acting on the support column 20 is resisted by the strut 30, but the embodiment of the present invention is not limited to this. For example, instead of the strut 30, a backstay 62 may be used as shown in FIG. 6(B).

The backstay 62 is a tensile member whose one end is joined to the upper end of the support column 20, extends along the Y direction and to the outside of the two support columns 20, and has the other end fixed to the foundation G or the like. be done.

Further, in the above-described embodiment, the shape of the roof body 10 is described as a roof (so-called gable roof) having two planes inclined to both sides from the ridgeline 10E, but the embodiment of the present invention is limited to this. do not have.

For example, the roof main body has a half-cylindrical shape (the roof main body 18 shown in FIG. 6C) curvedly inclined to both sides from the apex 18E (the uppermost linear portion of the roof main body 18). It is good also as a roof of a vault shape, a kiln shape). Even in such a shape, if the tie bar 40 or the like is applied, it is easy to secure an effective space below the roof body 18 while processing the thrust force.

Furthermore, the roof bodies 10 and 18 described above may be integrally connected to a roof having the same shape as the roof bodies 10 and 18 continuously in the Y direction. At this time, the roof substructure connected to the roof bodies 10, 18 does not necessarily have the support columns 22 and the tie bars 40, and various structures that can support the roof can be selected.

10 Roof body 18 Roof body 20 Support column 22 Support column 24 Support column 26 Support column 30 Strut (compression material)
40 tie bar (tension material)
50 tension string beam 52 bundle material 54 lower chord material

Claims (3)

a roof body sloping to both sides of the top;
a support column for supporting the roof body;
a plurality of tension members spanning from the upper end of the support column to a plurality of locations at the tip of the roof body;
roof structure with The support pillars are provided at two portions of the roof main body near the gable surface,
2. The roof structure of claim 1, wherein a compression member spans between said upper ends of said support posts. The tension member is
a bundle member protruding downward from the roof body;
a lower chord member connected to the lower end of the bundle;
It has a convex shape on the lower side with
A roof structure according to claim 1 or claim 2.

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