JP4318041B2 - Tower structure - Google Patents

Description

  The present invention relates to various tower-like structures, and particularly to a tower-like structure suitable for application as a steel tower or mast for installing communication devices such as antennas at high places.

  The structure of this kind of tower-like structure is generally a steel structure mainly composed of a frame made of steel, beams and braces. FIG. 4 to FIG. 5 show an example, and the one shown in FIG. 4 is mainly composed of a rigid frame structure that secures sufficient rigidity by itself by joining the pillar 1 and the beam 2 rigidly. 5 mainly includes a brace frame that secures rigidity by providing a wall brace 3 on the entire outer periphery instead of rigidly connecting the column 1 and the beam 2. It is usual to provide a horizontal brace 4 in each layer.

Further, for example, Patent Document 1 proposes a structure in which a pillar made of a pipe material, a horizontal brace, and a cross brace are assembled so as to be disassembled as a temporary structure provided as a support or a working scaffold in construction work. ing.
Japanese Patent Laid-Open No. 7-119290

  Since the temporary structure shown in Patent Document 1 is temporarily provided as a working scaffold or a supporting work, it is not directly applicable to a main tower structure such as a steel tower or mast in a communication facility. It is not something that can stand on its own.

  The rigid frame structure shown in FIG. 4 is rigidly connected to the column 1 and the beam 2 so that welding is indispensable, which is difficult in terms of workability and construction cost. The braced frame structure shown in FIG. Although it is possible to eliminate the need for welding, since a large number of wall surface braces 3 are provided on the outer peripheral portion, there is a concern that the openness is impaired and a communication failure occurs with respect to the device 5 installed therein. Further, in any case, since the vertical flow line is divided by the horizontal brace 4, it is difficult to install a maintenance staircase or the like inside, and usually only a simple trap 6 is provided. There is also difficulty in terms of maintainability.

  In view of the above circumstances, the present invention is not only capable of providing a sufficient rigidity and being able to stand by itself stably, but also can be constructed inexpensively and efficiently, and has an optimum structure particularly applicable to steel towers and masts in communication facilities. It aims at providing a tower-like structure.

The invention according to claim 1 is a tower-like structure constructed mainly of columns, beams, and braces, and the frame is formed inside a cubic or rectangular parallelepiped frame composed of columns and beams. Ri is provided a central three-dimensional brace bridges the respective disposed along a diagonal vertex through of the solid brace the joint member disposed at the center of the frame frame, one end to the joint member It is characterized by comprising eight brace members which are joined and extend radially around the other end and joined at the position of each apex of the frame .

Invention of Claim 2 is the tower-like structure of invention of Claim 1 , Comprising: A joint member consists of a gusset plate which consists of several steel plates integrally joined by the cross state, and each brace member is a back-to-back state The gusset plate and the gusset plate provided at the positions of the vertices of the frame frame, both ends of which are combined with each other at both vertices of the frame frame. The bolt is fastened in a state of being clamped from both sides.

The invention of claim 3 is the tower-like structure of the invention of claim 1 or 2 , wherein a plurality of frame frames are arranged adjacent to each other, and beams are omitted between the frame frames. It is characterized by providing a core frame incorporating stairs between three-dimensional braces.

  According to the present invention, by providing a three-dimensional solid brace inside the frame, the solid brace has the function of a normal planar (two-dimensional) wall brace and a horizontal brace by itself. Not only can the same or higher rigidity be ensured while reducing the required number of braces, but it is not necessary to provide a wall brace on the outer peripheral portion, so that openness can be naturally secured.

  And, since the three-dimensional brace has a configuration in which eight brace members are provided radially around the joint member, the three-dimensional brace can be assembled inexpensively and easily. The gusset plates made of a plurality of steel plates are integrally joined, and the brace member is made of a pair of channel steels, so that it can be manufactured at the lowest cost and is easy to construct. Furthermore, by providing a core frame in which frame frames are arranged side by side and steps are incorporated between them, maintainability can be greatly improved as compared with the case of a conventional turret.

  1 to 3 show an embodiment of the tower-like structure of the present invention. The tower-like structure of the present embodiment is basically a steel structure mainly composed of columns, beams, and braces as in the case of the brace frame shown in FIG. 5, but is based on the conventional brace frame. Is different from the installation form of braces.

  That is, the conventional brace frame shown in FIG. 5 is provided with a wall brace 3 on the outer periphery and a horizontal brace 4 on each layer. A three-dimensionally assembled solid brace 8 is provided inside a rectangular frame frame 7 and the solid brace 8 has both the functions of the conventional wall brace 3 and horizontal brace 4. .

  As shown in FIGS. 2 to 3, the three-dimensional brace 8 in the present embodiment is directed to each apex along the diagonal line of the frame frame 7 from the joint member 9 disposed at the center position of the frame frame 7 and the periphery thereof. Thus, it consists of eight brace members 10 extending radially. As shown in FIG. 3A, the joint member 9 is formed by integrally welding four gusset plates 9a to 9d at a desired angle so as to intersect with each other in an X shape in a side view. As shown in b), two brace members 10 are joined to each of the gusset plates 9a to 9d by bolt fastening.

  Each brace member 10 is composed of a pair of two channel steels 10a and 10b, and the channel steels 10a and 10b are combined in a back-to-back state as shown in FIG. The gusset plates 9a to 9d are fastened with bolts in a state of being clamped from both sides, and the other ends of the grooved steels 10a and 10b are in advance at the positions of the respective vertices of the frame 7 as shown in FIG. Bolts are fastened to the welded gusset plate 11.

  In addition, the tower-like structure of the present embodiment has a total of six pillars 1 positioned at each vertex of the rectangle and the middle part of the long side as shown in FIG. The two frame frames 7 are arranged side by side. However, the beam 2 is provided only on the outer peripheral portion, and the beam 2 is omitted between the two frame frames 7, so that both frames are provided. A space that is continuous in the vertical direction is naturally secured between the three-dimensional braces 8 provided inside the frame 7, and a core frame 12 is provided there, and a maintenance staircase 13 is incorporated outside the space. It is.

  According to the tower-like structure having the above structure, the functions of both the wall brace 3 and the horizontal brace 4 in the conventional brace frame shown in FIG. The required number of braces can be reduced while securing rigidity, and welding work can be omitted or greatly reduced compared to the case of the conventional rigid frame structure shown in FIG. Compared to a tower structure with a ramen frame or a brace frame, the workability is far superior and the construction cost can be reduced.

  Of course, the three-dimensional brace 8 is simply formed by radially joining eight brace members 10 around the joint member 9, and the joint member 9 welds four gusset plates 9a to 9d made of simple steel plates in an intersecting state. Since each brace member 10 is simply a combination of two channel steels 10a and 10b back to back, it can be assembled easily and inexpensively without requiring any special member or special work. In addition, the installation work inside the frame 7 is not troublesome. Therefore, installing this instead of the normal wall brace 3 and the horizontal brace 4 does not increase the cost. In addition, the present invention can be widely applied to the frame 7 having various forms and dimensions only by changing the shape and crossing angle of the joint member 9 and the length of the brace member 10 in accordance with the form and size of the frame 7.

  Further, since the three-dimensional brace 8 is only provided inside the frame 7, the openness of the outer peripheral portion is naturally secured, and the communication trouble with respect to the device 5 is reduced as in the case where a large number of wall braces 3 are provided as in the prior art. There is no concern that this will occur. It should be noted that it is not hindered to provide a wall material on the outer peripheral portion that does not adversely affect the communication function.

  Further, in the conventional general planar (two-dimensional) brace, the buckling length in the out-of-plane direction during compression is the distance between fulcrums, but in the three-dimensional solid brace 8 of the present embodiment, each brace member 10 is always stiffened from the out-of-plane direction by the other brace member 10 via the joint member 9, so that the design buckling length can be the member length of the brace member 10, and thus the normal planar Compared to a brace, the buckling length is substantially halved, and there is an advantage that a sufficient buckling strength can be secured even with a small cross section.

  Moreover, the tower-like structure of this embodiment has two frame frames 7 arranged side by side, the beam 2 is omitted between them, and the core frame 12 is provided there. In addition to having deformable performance, provision of the steps 13 in the core frame 12 enables much safer and more efficient maintenance work than in the case of the conventional wrapping 6.

  Note that the above embodiment is merely a preferred example, and the present invention is not limited as long as a three-dimensional solid brace is provided inside a cubic or cuboid frame with columns and beams. The form and scale of the entire tower-like structure, its use, the materials and forms of pillars and beams and three-dimensional braces, and other detailed configurations are arbitrary, and are limited to the above-described embodiments without departing from the scope of the present invention. It goes without saying that various design changes can be made without any problems.

For example, in the above-described embodiment, a pair of channel steel is adopted as the brace member 10, but the present invention is not limited thereto, and a steel material or a steel pipe having a suitable cross section can be adopted .

  In the above embodiment, the joint member 9 is configured by welding the four gusset plates 9a to 9d in an intersecting state. For example, the gusset plate 9a and the gusset plate 9b in the above embodiment are used as one gusset plate. The other two gusset plates 9c and 9d are welded to both sides, and if possible, the gusset plate 9c and the gusset plate 9d can be combined as a single gusset plate. It is conceivable to weld, and further, it is considered that the gusset plate 9a and the gusset plate 9c, the gusset plate 9b and the gusset plate 9d are respectively bent integrally in a V shape, and joined in an X shape. It is done. However, it is not preferable in terms of cost to make the joint member complicated or to use, for example, a special casting product as the joint member, and it is realistic to combine and weld a simple steel plate as in the above embodiment. is there.

  Furthermore, the installation of the core frame 12 and the stairs 13 is optional, and they may be omitted depending on the scale and use of the entire tower-like structure.

It is the elevation which shows schematic structure of the tower-like structure which is embodiment of this invention, and a top view. It is a perspective view showing a solid brace. The center part of a solid brace is shown, (a) is a side view, and (b) is a plan view. It is a figure which shows the tower-like structure by the conventional frame structure. It is a figure which shows the tower-like structure by the conventional brace frame.

Explanation of symbols

1 pillar 2 beam 7 frame 8 solid brace 9 joint member 9a to 9d gusset plate 10 brace member 10a, 10b channel steel 11 gusset plate 12 core frame 13 stairs

Claims (3)

A tower-like structure built mainly of columns, beams and braces,
Provided inside the cubic or rectangular parallelepiped frame composed of pillars and beams is a solid brace arranged along the diagonal passing through the center of the frame and constructed between the vertices .
The three-dimensional brace includes a joint member disposed at the center position of the frame, and one end joined to the joint member and extending radially around the joint, and the other end joined to each vertex of the frame 8. A tower-like structure comprising a brace member of a book. The tower-like structure according to claim 1 ,
The joint member is composed of a gusset plate composed of a plurality of steel plates joined together in an intersecting state, and each brace member is composed of a pair of channel steels combined back to back,
Both ends of the channel steels are bolted in a state of being sandwiched from both sides with respect to the gusset plate constituting the joint member and the gusset plate provided at each vertex of the frame. Characteristic tower structure. The tower-like structure according to claim 1 or 2 ,
A tower-like structure in which a plurality of frame frames are arranged adjacent to each other, beams are omitted between the frame frames, and a core frame incorporating a staircase is provided between three-dimensional braces in both frame frames. object.

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