JP2004263383A - X type crossing chord beam string structure body - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a novel chord beam string structure body capable of satisfactorily ensuring rigidity on a horizontal face and performing assembly work safely and easily by using a three-dimensional crossing beam and a chord beam string structure together. <P>SOLUTION: A framed structure of a roof face of a large-sized building having a rectangular shape when viewed in front is composed of a top chord 2, a bottom chord 3, a bracing member 4, and a top chord width retaining small beam 5. The top chord 2 forms an arch shape, and each of both end parts is stretched over an upper end part of a support body 6 diagonally opposite to span direction. Each top chord is crossed and connected in X shape in its central part. End parts of each adjacent top chord are fixed to one section in an upper end part of the support body. The bottom chord 3 is stretched between opposing top chord fixing parts in the upper end part of the support body. The bracing members 4 are arranged along the bottom chord at a predetermined interval and are stretched between the top chord and the bottom chord. The top chord width retaining small beam 5 is stretched between adjacent top chords. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a structure of a roof frame (roof girder) suitable for a long-span building having a rectangular shape in plan view such as a gymnasium.
[0002]
[Prior art]
Conventionally, it is well known that when a roof girder of a long span structure such as a gymnasium has a stringed beam structure, it is lightweight, has high safety, and has a small required cross-section of a member, thereby enabling economical design.
Thus, as a stringed beam structure suitable for a long span building, as shown in FIG. 14, a lower chord member 60 is stretched between both ends of an arched upper chord member 50, and between the upper chord member and the lower chord member. A “bow-shaped stringed beam” on which a staff member 70 is stretched and a “top straight beam” on which the upper chord 50 is horizontal as shown in FIG. 15 are known. As shown in FIG. 16, a pair of upper chord members 50, 50 connected by a width stop beam 80 at predetermined intervals in the horizontal direction is known. It is also known that two upper chords are arranged at an interval, and the two are connected by a connecting material to form a ladder-like upper chord, and both ends of the lower chord are joined to both ends. (See, for example, JP-A-2000-129859)
[Prior art]
[Patent Document 1] Japanese Patent Application Laid-Open No. 2000-129859
[Problems to be solved by the invention]
However, the beam string structure shown in FIGS. 14 and 15 has drawbacks in that the string material may be mechanically flipped out of plane, and measures must be taken to prevent this.
Further, the beam string structure shown in FIG. 16 is an improvement of the above-mentioned difficulties, but has a drawback that the stability at the time of assembling is poor, and it is easy to fall down, and the burden of preventing the behavior at the time of an earthquake is large. there were.
[0004]
SUMMARY OF THE INVENTION In view of the above-mentioned conventional drawbacks, the present invention uses a three-dimensional crossed beam and a string structure to ensure good horizontal rigidity and to perform a safe and easy assembling work. It is intended to provide.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, a beam string structure of the present invention is a frame structure of a roof surface of a large building having a rectangular shape in plan view, and includes an upper chord material, a lower chord material, a brace material, and an upper chord stop small beam. The upper chord material is in the shape of an arch, each end of which is laid over the upper end of the support body facing the span direction, and each upper chord material is cross-coupled in an X shape at the center thereof, The ends of each adjacent upper chord material are fixed to the same location on the upper end of the support.
Thus, the lower chord material is stretched between the upper chord material fixing portions at the upper end portion of the opposing support, and the brace material is disposed at predetermined intervals along the lower chord material, The upper chord width stop beam is stretched between adjacent upper chord members.
[0006]
The upper chord material may be cross-coupled in an X-shape with a connection fitting provided on the top.
Further, the brace member may be configured such that both lower end portions of a pair of rod-shaped members are fixed to the same location of the lower chord member, and each upper end portion is fixed to the adjacent upper chord member.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
Embodiment 1
Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.
In FIG. 1, reference numeral 1 denotes a roof beam main body formed in a rectangular shape in a plan view, and is composed of an upper chord material 2, a lower chord material 3, a staff member 4, and an upper chord width stop girder 5.
Reference numeral 6 denotes a support, which is provided with a predetermined span L and a required number of uprights at a predetermined interval M in a direction orthogonal to the span, and a girder beam 7 is installed between its upper ends. .
Reference numeral 8 denotes a connecting member protruding from the upper end of each column 6. A flange 10 is provided on one side of the upper end of the vertical rod 9, and a mounting hole 11 for a tightening line W is provided on the upper end of the vertical rod 9. It is provided.
[0008]
The upper chord material 2 is formed by bending a steel pipe in an arch shape, each end of the upper chord is spanned over the upper ends of struts 6, 6, and each end is bolted to the flange 10. It is fixed to the part.
The upper chords 2 cross each other in an X shape at the center of the span, and the crossing portions 14 are connected by connecting members 15.
Further, both ends of the tightening lines W respectively inserted into the upper chord material 2 are fixed to the mounting holes 11 respectively.
[0009]
The lower chord material 3 is stretched between opposing columns 6 and 6, and both ends thereof are fixed to the vertical rod 9 by fixing members 20 so that a compressive force can be applied to the upper chord material 2. It is.
A required number of the brace members 4 are arranged at equal intervals along each lower chord member 3, and the lower ends of a pair of rod-shaped members are fixed to the same location of the lower chord member 3, and the respective upper ends thereof are fixed. The upper chord 2 and the lower chord 3 are connected by fixing the parts to the connecting members 30 and 30 or the connecting members 15 and 15 fitted to the adjacent upper chord 2 respectively.
[0010]
Further, the upper chord width stopping small beam 5 is disposed along the upper chord material 2 in a direction orthogonal to the span, and between the connecting members 15 of the adjacent chord material 2 and between the connecting members 30, 30. Each of them is stretched to prevent the upper chord 2 from spreading in the horizontal direction.
[0011]
Next, a process of assembling the beam string structure of the present invention will be described with reference to FIGS.
(A) First, as shown in FIG. 10, four columns 6 are erected at a predetermined span L and at a predetermined interval M in a direction orthogonal to the span, and between the upper ends of the columns 6. The girder beam 7 is erected respectively.
(B) Next, as shown in FIG. 11, the upper chord members 2 and 2 that are curved in an arc shape are lifted up, and each end thereof is fixed to the upper end of the strut 6 facing the streaks, and is formed into an X shape at the center of the span. After the intersection, the intersection is connected by the connecting member 15.
(C) Next, as shown in FIG. 12, a new support column 6 is erected at a predetermined interval M from the existing support column 6, and a girder beam 7 is erected. 2 and 2 are installed.
(D) Next, as shown in FIG. 13, after arranging the upper chord width stopping small beams 5 between the adjacent upper chord members 2, the lower chord members 3 are respectively stretched between the upper ends of the opposing columns 6. At the same time, the hook 4 is stretched between the upper chord 2 and the lower chord 3.
(E) The steps (b) to (d) are repeated to complete the assembly.
[0012]
In the above embodiment, a steel pipe having a circular cross section was used as the upper chord material 2, but a material having an arbitrary cross section such as an H-shaped steel, an L-shaped steel, or a steel rod may be used. The same applies to material 4. Also, as the lower chord material 3, a material such as a wire, a steel bar, and a steel plate can be used. Thus, the coupling member 15 provided at the center of the upper chord 2 can be of various shapes depending on the cross-sectional shape of the upper chord used.
Further, the upper chord material 2 is made to cross in an X shape after being lifted up. However, there is a case where the upper chord material is lifted up and erected between the struts 6 in an X shape. Also, a case has been described in which a support pillar is erected as a support and a girder beam is erected between its upper ends. However, a support wall made of reinforced concrete or the like having a required thickness may be used.
[0013]
【The invention's effect】
As described above, since the beam string structure according to the present invention is configured as in claim 1, in a building having a large span length, the rigidity of the horizontal plane is extremely good, and the structure is suitable for earthquakes and the like. Since the horizontal movement can be received three-dimensionally, a solid roof structure can be realized.
Further, according to the present invention, when steel pipes are used as the upper chord material, the cross connection is easy and the construction work can be performed safely.
In addition, according to the third aspect, there is an advantage that the attaching work of the brace material is easy and the roof girder of the long span building can be quickly constructed.
Furthermore, the beam string structure according to the present invention has an advantage that it can be used for a wide range of long-span structures from small to medium-sized ones such as atriums and gymnasiums to large-scaled ones such as arenas.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a roof girder of a gymnasium or the like using the beam string structure of the present invention.
FIG. 2 is a partial cross-sectional view taken along line XX in FIG.
FIG. 3 is a partial sectional view taken along line YY in FIG. 1;
4 is a plan view of a portion A in FIG. 1; FIG. 5 is an upper side view of the same.
FIG. 6 is a plan view of a portion B in FIG. 1;
FIG. 7 is a sectional view of the same.
FIG. 8 is a side view of a portion C in FIG. 1;
FIG. 9 is a sectional view of a portion D in FIG. 1;
FIG. 10 is a perspective view showing a part of an assembling process.
FIG. 11 is a perspective view showing a part of an assembling process.
FIG. 12 is a perspective view showing a part of an assembling process.
FIG. 13 is a perspective view showing a part of the assembling process.
FIG. 14 is a front view showing a conventional example of a beam string structure.
FIG. 15 is a front view showing a conventional example of a beam string structure.
FIG. 16 is a perspective view showing a conventional example of a beam string structure.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Roof beam 2 Upper chord material 3 Lower chord material 4 Cross stick material 5 Upper chord stop small beam 6 Prop 7 Girder beam 8 Connection member 15 Connection member

Claims (3)

It is a frame structure of the roof surface of a large building having a rectangular shape in a plan view, comprising upper chord material, lower chord material, brace material and upper chord width stop girder, and the upper chord material has an arch shape. Each end is laid over the upper end of the support facing the span direction, and each upper chord is cross-coupled in an X shape at the center thereof, and the end of each adjacent upper chord is connected to the upper end of the support. The lower chord material is fixed at the same location, and the lower chord material is stretched between the upper chord material fixing portions at the upper end of the opposing support, and the brace material is arranged at predetermined intervals along the lower chord material. An X-shaped crossed strut beam structure, wherein each of the struts is stretched between adjacent upper and lower chord materials, and the upper chord width stop beam is stretched between adjacent upper chord materials. 2. The X-shaped crossed beam structure according to claim 1, wherein the upper chord members are cross-linked in an X-shape by a metal fitting provided at a central portion thereof. The said each staff | stick material fixes the both lower ends of a pair of bar-shaped member to the same location of a lower chord, and fixes the upper end to each adjacent upper chord. The X-shaped crossed string beam structure as described in the above.

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