JPS6143894Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an earthquake-resistant structure of a building, and more particularly to a frame structure of an earthquake-resistant structure.

In general, earthquake-resistant structures for buildings include so-called brace structures in which beams and columns are joined by diagonal members, or earthquake-resistant structures in which walls are built within a frame surrounded by beams and columns. However, since high-rigidity diagonal members are used to resist horizontal forces, the natural period of the building is shortened, resulting in large seismic stresses. In addition, in the case of the latter shear wall structure, in order to avoid the occurrence of large seismic stress, joint members are interposed between the beams, columns, and beams and bolted together to ensure high rigidity against small and medium earthquakes, and in the case of large earthquakes. has a complex structure that absorbs energy and reduces deformation by yielding the bonded members. Another disadvantage was that the effective space inside the building was reduced because it was partitioned with diagonal members or face members.

In order to solve the problems of the above-mentioned conventional method, the present applicant previously filed Utility Application No. 171959 (filed on November 20, 1981) (see Utility Model Application No. 78348/1983). Consisting of a chevron-shaped frame with horizontal parts parallel to the beams, and connecting members that connect the chevron-shaped frame and the beams, the purpose is to reduce the deformation of the building in the event of a major earthquake and to secure effective space inside the building. An application was filed for an earthquake-resistant structure for the building.

FIG. 1 shows the earthquake-resistant structure according to the above application. In FIG. 1, reference numeral 5 indicates a chevron-shaped frame consisting of a horizontal portion 4 and inclined portions 3, 3a, and numeral 6 indicates a shear stress of a web 6a in response to a horizontal force received from the beam 2 or the horizontal portion 4 of the chevron-shaped frame. It is a connecting member that resists, and a chevron-shaped frame 5 is arranged within a frame surrounded by columns 1, 1a and beams 2, 2a, and its horizontal part 4 and beam 2 are bolted together via a connecting member 6. be. When this structure is hit by a major earthquake, the connecting members 6
This structure is expected to absorb seismic energy by yielding and shearing the web 6a, and as a result, to receive a large damping capacity.

However, as shown in FIG. 2, when a horizontal force P is applied to this structure due to an earthquake, rotational deformation occurs in the horizontal direction of the chevron frame 5, and half of the webs 6a of the joining member 6 undergo shear deformation and tensile deformation. causing deformation,
The remaining half undergoes shear and compression deformations. As a reaction to the tensile or compressive deformation of the joining member 6, the beam 2 receives a force Q in the direction perpendicular to the material axis from the joining member 6, resulting in a problem in which the stress in the beam 2 becomes excessive.

The present invention provides an earthquake-resistant structure for buildings that eliminates the drawbacks of conventional structures.The present invention will be explained below with reference to the drawings.

FIG. 3 is a front view of an embodiment of the present invention, and FIG. 4 is a detailed view of the joining member 6 based on the present invention. 1st
The same parts as in FIGS. In FIGS. 3 and 4, the joining member 6 is divided into two T-shaped cross-sectional members 7a and T-shaped cross-sectional members 7b, and the members 7a and 7b are vertically connected through long holes 10 with a long diameter. They are connected with bolts 8. Further, the member 7a and the member 7b are each connected to a bolt 8.
A packing material, for example, a packing material 9 made of polyfluorinated ethylene fiber with a relatively small coefficient of friction, is interposed on the contact surface between the members 7a and 7b, and the members 7a and 7b are connected to the beam 2 and the horizontal part 4 of the chevron-shaped frame 5, respectively, by bolts. Join. By adopting such a configuration, the member 7a
and member 7b have a structure in which they can freely slide relative to each other in the vertical direction.

According to the present invention configured as described above, when horizontal force P due to an earthquake acts and interstory displacement occurs, the horizontal portion 4 of the mountain-shaped frame 5 shown in FIG. 5 undergoes rotational deformation. Accordingly, in approximately half of the joining members 6, the members 7a and 7b slide toward each other in the vertical direction, and in the remaining half of the joining members 6, the members 7a and 7b slide away from each other in the vertical direction. The force Q that occurs in the case of FIG. 2 due to sliding does not occur in the earthquake-resistant structure of the building of the present invention. Therefore, beam 2
This has the advantage that the cross section of steel materials such as H-shaped steel, channel steel, and trusses can be made smaller.

As is clear from the above description, according to the present invention, the following remarkable effects can be obtained.

(1) Since the chevron-shaped frame 5 having the horizontal portion 4 is used, the space under it can be used effectively.

(2) By appropriately setting the slopes of the inclined portions 3 and 3a of the chevron-shaped frame 5, appropriate rigidity can be imparted to the structure.

(3) In the case of a major earthquake, the structure of the joint member 6 is divided into two members 7a and 7b, and the parts can be slid freely in the vertical direction through a loose long hole and packing material. , the beam 2 is not subjected to force in the direction perpendicular to the material axis, and great damping performance can be obtained.

(4) Since the joining member 6 is connected to the beam 2 and the horizontal portion 4 of the chevron-shaped frame 5, and the members 7a and 7b are connected by bolts, replacement is easy.

[Brief explanation of the drawing]

Fig. 1 is a front view showing an example of a conventional earthquake-resistant structure of a building, Fig. 2 is an explanatory diagram of its operation, Fig. 3 is a front view of an embodiment of the present invention, and Fig. 4 is a detail of a joint member based on the present invention. FIG. 5 is an explanatory view of its operation. 1, 1a: Column, 2, 2a: Beam, 3, 3a: Inclined part, 4: Horizontal part, 5: Chevron frame, 6: Joint member,
7a, 7b: T-shaped cross-section member, 8: Bolt, 9:
Packing material made of polyfluorinated ethylene fiber.

Claims (1)

[Scope of utility model registration request] In the earthquake-resistant structure of a building, a mountain-shaped frame consisting of a horizontal part and an inclined part is arranged within a frame surrounded by columns and beams, and the horizontal part of the mountain-shaped frame and the beam are connected with bolts via connecting members, The joining member is divided into two T-shaped cross-sectional members, one of which is bolted to the beam and the other to the horizontal part of the chevron-shaped frame, and both of the joining members are plugged into a long diameter hole in the vertical direction. An earthquake-resistant structure for buildings that is characterized by being joined by bolts through materials.