JPH09328819A - Elasto-plastic damper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To display large plastic-deformation absorbing power to an earthquake motion by winding a steel plate on the outer circumference of the main body section of a laminated rubber, fixing a patch onto an upper-side flange, sticking a Teflon plate and holding the patch by a carrier on the structure side. SOLUTION: A steel plate 4 is wound on the outer circumference of the circular body section 1a of a laminated rubber 1, and a flange 2 on the lower side is fixed onto a certain section 10 in a structure by bolts 5. A patch 6, can which a Teflon plate 8 improving sliding is stuck, is fastened onto a flange 2 on the upper side by the bolts 5, and held by carriers 7 installed to another section 9 in the structure. When the two sections 9, 10 of the structure intend to be moved in the different directions in the horizontal direction at the time of an earthquake, etc., deformation in the horizontal direction is generated in the circular body section la of the laminated rubber 1 by force from the carriers 7, and the steel plate 4 follows up to the deformation of the circular body section 1a and shorn and yielded and a large plastic-deformation absorbing power is displayed. Since sliding is generated among the Teflon plate 8 and the carriers 7 to different movement in the vertical direction, on the other hand, no tensile force and deformation is also generated in the laminated rubber 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elasto-plastic damper used for improving vibration resistance and wind resistance of a building structure or tower structure.

[0002]

2. Description of the Related Art It is well known that laminated rubber is used in a seismic isolation structure effective as a measure for improving the seismic performance of a building structure. A cross section of a conventional general laminated rubber is shown in FIG. Steel plate 12 and rubber 1 between upper and lower flanges 2
It has a structure in which 3 are alternately stacked, and is extremely strong against the top loading pressure from above, and has the characteristics that it can be easily sheared and deformed against a horizontal force from the side.

In FIG. 4B, a plastic metal 14 such as lead is arranged in the center of the laminated rubber, which is usually L
It is called RB (laminated rubber with lead plug). The characteristic is that the plastic metal 14 has a certain level of horizontal rigidity until it shear-yields, and when a horizontal force that exceeds the load at which the plastic metal 14 shear-yields is applied, the original horizontal laminating ability of the laminated rubber can be exhibited. It is a thing.

In the seismic isolation structure which is one of the seismic resistant structures of buildings, as shown in FIG.
It is used by laying it between the lower foundation 16 and the base. As described above, the laminated rubber has the ability to support a large vertical load, so that the weight of a building can be easily supported. When an earthquake 17 occurs, as shown in Fig. 5,
Due to the large horizontal displacement occurring in the laminated rubber portion, the movement of the earthquake is absorbed by the laminated rubber portion, and the upper building is insulated from the movement of the earthquake by the upper building 15 To keep things healthy.

[0005]

However, the application of the laminated rubber has been almost limited to the application to the seismic isolation structure of this building until now. It is considered that this is because the laminated rubber is strong against the compressive force, but hardly expected against the tensile force, as described above.

Therefore, an object of the present invention is to devise a laminated rubber so that a tensile force does not act, and to use it as a measure for reducing an elasto-plastic seismic response other than seismic isolation.

[0007]

An elasto-plastic damper according to the present invention for achieving the above-mentioned object is obtained by winding a steel plate around the outer circumference of a laminated rubber body and attaching a metal plate to the upper flange of the laminated rubber. It is characterized in that a receiving metal is arranged from the side of the structure so as to sandwich it, and a fluorine resin plate for improving sliding is attached to at least one of contact surfaces of the metal and the receiving metal.

[Operation] The operation of the elasto-plastic damper having the above construction will be described with reference to FIG. In the figure, the lower flange 2 of the damper is fixed to a portion 10 of the structure with a bolt 5. On the other hand, the pad 6 is still attached to the upper flange 2 by the bolt 5
And a Teflon (trademark of poly-tetra-fluoro-ethylene) plate 8 for improving sliding is attached to the contact surface of the backing metal 6 with the backing metal 7. A steel plate 4 is wound around the laminated rubber so as to surround the laminated rubber body.

In this state, if the two parts 9 and 10 of the structure try to move differently in the left-right direction of the paper surface during an earthquake or the like, a force P is generated on the base plate 7 and a broken line is formed on the laminated rubber part. A lateral deformation δ occurs as shown by. At this time, the steel plate 4 wrapped around the laminated rubber follows the shear deformation of the laminated rubber and undergoes shear yield.

An example of the relationship between the load P and the shear deformation δ at this time is shown in FIG. 3. Since the steel plate 4 is wound around the periphery, the relationship between P and δ becomes a large loop. A large plastic deformation absorption capacity can be exhibited.

On the other hand, two parts 9 and 10 of the structure are shown in FIG.
When different movements are performed in the direction perpendicular to the paper surface and in the vertical direction, slippage occurs between the teflon plate 8 or the like attached to the backing pad 6 for improving the slip and the receiving metal 7, and Does not generate tensile force and does not deform.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the elasto-plastic damper according to the present invention will be described in detail with reference to Examples.

"Embodiment" FIG. 1 is a structural explanatory view of an elasto-plastic damper, FIG. 1 (a) is a front view, and FIG. 1 (b) is a sectional view taken along the line AA of FIG. 1 (a).

As shown, the circular main body 1 of the laminated rubber 1
A steel plate 4 is wound around the outer peripheral surface of a. Then, one flange (lower side in the figure) 2 of the laminated rubber 1 is fixed to the portion 10 where the structure is provided by the bolt 5. In the figure, 3 is a bolt hole.

On the other flange (upper side in the figure) 2, a backing metal 6 is fixed with bolts 5, and a receiving metal 7 is arranged so as to sandwich the corresponding gold 6 from another portion 9 of the structure. .
Then, a Teflon plate 8 for improving sliding is attached to the contact surface of the pad 6 with the receiving plate 7.

With such a structure, when the two parts 9 and 10 of the structure try to move differently in the horizontal direction at the time of an earthquake or the like, the force exerted by the base metal 7 causes the laminated rubber 1 to move.
Lateral deformation occurs in the circular main body 1a. At this time, the steel plate 4 wound around the circular main body 1a shears and yields following the shear deformation of the circular main body 1a, and exhibits a large plastic deformation absorbing capacity.

On the other hand, when the two parts 9 and 10 of the structure are to move differently in the vertical direction, the pad 6
Since slippage occurs between the Teflon plate 8 attached to and the receiving metal 7, neither tensile force nor deformation is generated in the laminated rubber 1.

In the above embodiment, a normal laminated rubber is used as the laminated rubber 1. However, when a laminated rubber containing a lead plug as shown in FIG. The steel plate 4 wound around the laminated rubber 1 may be omitted if an alternative action of the steel plate 4 wound around the laminated rubber can be expected. Further, instead of the Teflon plate 8, another fluorine resin plate or a low friction resin plate may be used.

[0019]

As described above, according to the present invention, it is possible to greatly reduce the vibration response of the entire structure during an earthquake due to the large plastic energy absorption due to the large plastic deformation capacity of the elasto-plastic damper. Further, due to the structure having the backing plate and the backing plate, no tensile force acts on the elasto-plastic damper.

[Brief description of drawings]

FIG. 1 is a structural explanatory view of an elasto-plastic damper according to an embodiment of the present invention.

FIG. 2 is an explanatory view of the action of the elasto-plastic damper of the present invention.

FIG. 3 is a relationship diagram of load and deformation of the elasto-plastic damper of the present invention.

FIG. 4 is a structural explanatory view of a conventional laminated rubber.

FIG. 5 is an explanatory view of the operation when a laminated rubber is used as a seismic isolation structure.

[Explanation of symbols]

 1 Laminated rubber 2 Flange 4 Steel plate 5 Bolt 6 Cover metal 7 Receiving metal 8 Teflon plate 9, 10 Structure

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Yoshiaki Itakura 4-6-22 Kannon Shinmachi, Nishi-ku, Hiroshima City, Hiroshima Prefecture Mitsubishi Heavy Industries, Ltd. Hiroshima Research Institute (72) Inventor Hiroshi Kondo 4 Kannon Shinmachi, Nishi-ku, Hiroshima City, Hiroshima Prefecture 6-22 No. 22 Hiroshima Factory of Mitsubishi Heavy Industries, Ltd.

Claims (1)

[Claims] 1. A steel plate is wound around the outer circumference of the laminated rubber body, a backing metal is attached to the upper flange of the laminated rubber, and a receiving metal is arranged from the structure side so as to sandwich the corresponding gold,
An elasto-plastic damper characterized in that a fluororesin plate that improves sliding is attached to at least one of the contact surfaces of the metal and the metal receiving member.