JP2551215B2 - Beam frame - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a beam frame structure capable of constructing a large span / multi-storey building.

[Conventional technology]

In the case of a manufacturing factory that requires fine processing such as semiconductor manufacturing, it is necessary to minutely control the vibration level of the floor of the manufacturing line unlike a general building.

Further, in recent years, due to reasons such as difficulty in securing a large factory site, there has been a tendency to multi-layer factories for the purpose of such fine processing.

Heretofore, by using a frame having a structure as shown in FIGS. 4 to 6 for a building of this type, a multi-story manufacturing factory has been constructed for the purpose of fine processing.

[Problems to be Solved by the Invention]

Of these, the structural frame shown in Fig. 4 is used in the lower manufacturing line.
This is a method of installing many columns to control the vibration of the upper layer production line, but there is a drawback that the work space of the lower layer production line is significantly restricted because many columns are scattered on the lower layer production line. .

In addition, the structural frame shown in Fig. 5 is a method of controlling the vibration of the upper floor by installing truss beams or beam members with high beam rigidity on the upper floor, but in the case of a factory that generally performs fine processing, Since a space is required under the floor of the manufacturing line, it is difficult to effectively use the underfloor in the direction perpendicular to the beam in such a structural frame.

Further, the structural frame shown in Fig. 6 secures an effective space under the floor in the direction perpendicular to the beam by removing the middle span of the truss beam shown in Fig. 5, but the rigidity of the central part of the beam is insufficient. However, the vibration of the upper floor cannot be improved so much.

[Means for solving the problem]

In order to achieve the above object, the beam frame according to the present invention is
A number of bundles are vertically installed at predetermined intervals between the upper chord member and the lower chord member of the beam to form a lattice beam, and between the fulcrums of the lattice beam, an arch member protruding upward in a substantially parabolic shape is formed. Set up,
Moreover, both ends of the arch material are fixed to the ends of the lower chord member, the top portion of the arch material is fixed so as to overlap with the upper chord member, and the intersection portion of the arch material and the bundle is fixed.

〔Example〕

The present invention will be described below with reference to an embodiment shown in the drawings.

FIG. 1 shows a beam frame according to the present invention.
In the figure, reference numeral A is a beam, 1 is an upper chord member, 2 is a lower chord member, 3 is a bundle member, and 4 is an arch member.

Among the above members, for the upper chord member 1, the lower chord member 2, the bundle member 3, and the arch member 4, H-section steel, I-section steel, L-section steel, steel pipe, or the like is used.

The arch material 4 is continuously installed between the left and right fulcrums of the beam A,
The central portion projects upward in a substantially parabolic shape. Then, the top of the arch material 4 is connected so as to overlap with the upper chord material 1. That is, the top portion of the arch member 4 can be used as a single member for the upper chord member 1 or as a joining member.

Further, both ends of the arch member 4 are joined to both ends of the lower chord member 2, the arch member 4 and the bundle member 3 are fixed at intersections, and the top of the bundle member 3 is joined to the upper chord member 1 and the bundle member 3 is joined. The lower part is joined to the lower chord member 2.

Further, by making each joint of the arch member 4 and the upper chord member 1, the lower chord member 2 and the bundle member 3 rigid, the stress due to the eccentric load applied to the floor is uniformly processed.

In addition, the diagonal members 5b and 5b are provided on both sides of the bundle 3 to form the gusset plate 5
By using c to install in a substantially Y shape (see FIG. 2), the vibration property between the arches is improved. Reference numerals 1 ′ and 2 ′ are horizontal members connecting the upper and lower chord members 1 and 2.

The cross-sectional size and installation interval of these members are determined by the span size of the beam A and the like.

〔The invention's effect〕

Since the present invention is configured as described above, it has the following effects.

The long-term load applied to the floor on the upper floor can be almost entirely borne by the axial force of the arch material, and in addition to this, the beam frame structure can be constructed by the upper and lower chord members and the bundle material.

By rigidly joining the bundle material and the arch material, the stress due to the eccentric load applied to the floor can be uniformly treated.

The shaft of the lattice beam consisting of upper and lower chords and bundles resists short-term loads such as earthquakes, and the arch stiffness, the upper and lower chords, and the bundles combine to increase the beam rigidity and cope with minute vibrations.

It is possible to economically construct a large-span building not only for a building that requires fine vibration control but also for a general building.

[Brief description of drawings]

1 to 3 show one embodiment of the present invention. FIG. 1 is a frame assembly view of a frame, FIG. 2 is an enlarged sectional view taken along the line EE in FIG. 1, and FIG. The drawing is a partially enlarged view of the beam of the frame shown in FIG. 2, and FIGS. 4, 5, and 6 are frame diagrams of the conventional structural frame. A: Beam, 1 ... Upper chord, 2 ... Lower chord, 3 ... Bunch,
4 ... arch material, 5a ... auxiliary diagonal material, 5b ... diagonal material.

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Yasuo Ogawa 1-2-7 Moto-Akasaka, Minato-ku, Tokyo Kashima Construction Co., Ltd. Kashima Construction Co., Ltd. Nagoya Branch (72) Inventor Ken Saito Ken Akasaka 1-3-8 Tokyo Kashima Construction Co., Ltd. Kanto Branch (72) Inventor Kei Kei Ando 2-19-1 Tobita, Chofu-shi, Tokyo Issue Kashima Construction Co., Ltd. Technical Research Institute (56) References Jikkou 26-8550 (JP, Y1)

Claims (1)

(57) [Claims] 1. An arch projecting a plurality of bundles vertically at predetermined intervals between upper chord members and lower chord members to form a lattice beam, and arches projecting upward in a substantially parabolic shape between fulcrums of the lattice beams. Material is installed, both ends of the arch material are fixed to the lower chord material, and the top of the arch material is configured to be fixed so as to overlap with the upper chord material, and the intersection of the arch material and the bundle material is fixed. Beam frame characterized by becoming.