JPH0493432A - Vibration resistant frame - Google Patents

Abstract

PURPOSE:To reduce cost by forming a beam with the arrangement of a plurality of clustering members between upper and lower chord members at the predetermined intervals, and positioning an arch member between the support points of the beam. CONSTITUTION:An arch member 4 is continuously extended between right and left support points of a beam A, and the center portion thereof is made to project up or down roughly in the form of a parabola. Also, both ends of the arch member 4 is jointed to both ends of an upper chord member 1, and the intermediate section thereof is jointed to a clustering member 3 and a lower chord member 2. Furthermore, the joints of the arch member 4 and the upper chord member 1, and the lower chord member 2 and the clustering member 3 are respectively made rigid, thereby uniformly treating stress acting on a floor due to an eccentric load. Furthermore, slant plates 5 and 5 are arranged at both sides of the clustering member 3 approximately in a Y-form for improving vibration properties between arches.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a vibration-resistant frame that makes it possible to construct large-span, multi-story buildings.

[Prior art]

In the case of manufacturing factories that require minute processing, such as semiconductor manufacturing, it is necessary to minutely control the vibration level of the floor of the manufacturing line, unlike in general buildings.

In addition, in recent years, due to the difficulty of securing a large factory site, there has been a tendency to build factories with multiple layers for the purpose of such microfabrication.

Conventionally, in this type of building, a multi-story manufacturing factory for the purpose of microfabrication has been constructed by using a bridge structure as shown in FIGS. 5 to 7.

[Intelligence B to be Solved by the Invention] Of these, the structural frame shown in Figure 1 is a method in which many columns are installed on the lower production line in order to control vibrations in the upper production line. Since there are many columns on the line, there is a drawback that the work space on the lower production line is severely restricted.

In addition, the structural frame shown in Figure 2 is a method of controlling the vibration of the upper floor by installing truss beams or beam materials with high beam rigidity on the upper floor. Since space is required under the floor of the production line, such structural bridges make it difficult to effectively utilize the space under the floor in the dyeing direction.

Furthermore, the structural frame shown in Figure 3 secures effective space under the floor in the direction of dyeing by taking the slope of the middle span of the truss beam shown in Figure 2, but the rigidity of the central part of the beam is insufficient. However, the vibration properties of the upper floor cannot be improved much.

[Means to solve the problem]

In order to achieve the above object, the anti-vibration frame according to the present invention includes a plurality of bundled members installed at predetermined intervals between the upper chord member and the lower chord member of the beam, and an arch member installed between the fulcrums of the beam. It consists of:

〔Example〕

Hereinafter, the present invention will be explained with reference to an illustrated embodiment.

Figures 1 and 2 show a vibration-resistant frame according to the present invention. In the figures, A is a beam, number 1 is an upper chord member, 2 is a lower chord member, 3 is a bundle member, and number 4 is an arch member. It is.

Among the members, the upper chord material 1, the lower chord material 2, and the bundle material 3,
L-shaped steel, I-shaped steel, L-shaped steel, circular steel pipes, etc. are used, and the arch material 4 includes circular steel pipes in addition to the above-mentioned steel materials, and furthermore,
PC steel wire etc. are used.

The arch material 4 is installed continuously between the left and right fulcrums of the beam A, and its central portion protrudes downward or upward in a substantially parabolic shape.

Further, both ends of the arch material 40 are joined to both ends of the upper chord material 10, and the intermediate portion is joined to the bundle material 3 and the lower chord material 2.

Furthermore, by rigidly connecting the arch material 4, the upper chord material 1, the lower chord material 2, and the bundle material 3, stress caused by eccentric loads applied to the floor is evenly treated.

Further, by installing diagonal members 5, 5 in a substantially Y-shape on both sides of the bundle material 3 (see FIG. 3), the vibration characteristics between the arches are improved.

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

〔Effect of the invention〕

Since the present invention has the above configuration, it has the following effects.

■ It is possible to construct a large span floor with economical vibration control.

■ Generally speaking, a manufacturing factory for microfabrication requires space under the floor for manufacturing purposes, but with this structure, the space under the floor in the dyeing direction can be effectively used, reducing the floor height. , the space under the floor can be effectively used, which means cost reduction can be achieved.

■ Since there are no pillars on the production line on the lower floor, the lower floor can be used effectively.

■ Since the load applied to the upper floor can be handled almost entirely by axial force,
It is possible to economically construct a floor with controlled undulation, that is, a floor with controlled vibration.

■ By using a rigid connection between the bundle material and the arch material, stress caused by eccentric loads applied to the floor can be evenly treated.

■ It is possible to economically construct large-span buildings, not only for buildings that require micro-vibration control, but also for general buildings.

[Brief explanation of the drawing]

Figures 1 to 4 show an embodiment of the present invention, Figures 1 and 2 are frame diagrams of the frame, Figure 3 is an enlarged cross-sectional view taken along line E in Figure 1, FIG. 4 is a partially enlarged view of the beam of the frame shown in FIG. 2, and FIGS. 5, 6, and 7 are frame diagrams of the conventional structural frame. A...beam, work...upper chord, 2...lower chord, 3...
- Bundle material, 4... arch material, 5... diagonal material.

Claims (1)

[Claims] (1) A vibration-resistant frame characterized in that a beam is constructed by installing a plurality of bundles at predetermined intervals between an upper chord member and a lower chord member, and installing an arch member between the fulcrums of the beams. .