JPH11303933A - Slide bearing structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain stable vibrating performance by improving manufacturing performance and workability. SOLUTION: The slide bearing structure is provided with a laminar rubber bearing body 1 to be fixed to a building 2 and in which rubber layers 13 and intermediate steel plates 14 are alternately laminated between an upper steel plate 11 and a lower steel plate 12, and a slide plate 5 to be fixed to a concrete foundation 3 and with which the laminar rubber bearing body 1 is to be brought into contact. A low friction material 6 is provided on the lower steel plate 12 of the laminar rubber bearing body 1, and a clad steel is used for the slide plate 5. Therefore, since a base plate is not required when the slide plate 5 is fixed to the concrete foundation 3, management of fastening work by bolts and quality control of adhesives are not required. Moreover, since machining or processing for maintaining the smoothness can be performed before the slide plate 5 is installed on the concrete foundation 3, management and handling in manufacturing and working are facilitated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sliding bearing structure used for seismic isolation, vibration isolation or vibration isolation of buildings and precision equipment.

[0002]

2. Description of the Related Art Conventionally, buildings and precision equipment have been seismically isolated.
For the purpose of vibration isolation or vibration isolation, for example, a sliding bearing structure as shown in FIG. 3 is employed. This sliding bearing structure
It comprises a laminated rubber bearing 80 fixed to the building 20 and a sliding plate 60 installed on a base plate 50 fixed in advance to the concrete foundation 30.

In the sliding bearing structure thus constructed, the laminated rubber bearing 80 normally supports the vertical load of the building 20 without buckling, and the laminated rubber bearing 80 horizontally deforms during a small or medium-sized earthquake. Absorb the seismic force, and in the event of a large earthquake, the laminated rubber bearing 80 exceeds the amount of horizontal deformation, and the horizontal load applied to the laminated rubber bearing 80 exceeds the frictional force. The fixed low friction material 70 slides on the slide plate 60. Therefore, the history curve of horizontal load-horizontal displacement indicates low rigidity and large damping, so that the period of seismic isolation or the like can be made longer.

[0004]

However, in such a sliding bearing structure, if a chemical bond such as an adhesive is used to install the sliding plate 60 on the base plate 50 fixed to the concrete foundation 30, the sliding will be difficult. It was difficult to secure the flatness of the plate 60 and to control the quality of the adhesive. this is,
In spite of using a thin sliding plate 60 in consideration of cost, weight, etc., the flatness is required to be about 1/1000 of the outer dimension, so management and handling at the time of manufacturing and construction Becomes very difficult.

A sliding plate 60 is placed on the base plate 50.
When mechanical coupling such as bolts is adopted to install
Since the fastening work had to be performed, assembly management was required. Further, since the slide plate 60 is mounted on the base plate 50, if the base plate 50 is deformed, it is deformed according to the deformed shape. there were.

SUMMARY OF THE INVENTION The present invention has been made to solve such a conventional problem, and an object of the present invention is to provide a sliding bearing structure capable of obtaining stable sliding performance by improving manufacturability and workability. And

[0007]

SUMMARY OF THE INVENTION A sliding bearing structure according to the present invention that achieves the above object is a sliding bearing structure in which an upper structure and a lower structure are vibrationally insulated so as to be relatively displaceable from each other. A bearing member fixed to the lower structure, and a sliding plate fixed to a structure opposite to any of the structures to which the bearing member is fixed and contacting the bearing member; One of the sliding surfaces is provided with a low friction material, and the other is made of clad steel.

Further, the sliding bearing structure of the present invention is a sliding bearing structure in which an upper structure and a lower structure are vibration-insulated so as to be relatively displaceable from each other. A laminated rubber bearing body, which is alternately laminated and fixed to the upper structure, and a sliding plate fixed to the lower structure and abutted by the laminated rubber bearing body. One of the sliding surfaces is provided with a low friction material, and the other is made of clad steel.

In such a sliding bearing structure, if clad steel is used for the sliding plate, accuracy control when fixing the sliding plate to the lower structure is facilitated. If a stud bolt with a head, an anchor bolt, or the like is attached to the back surface of the slide plate, the base plate is not required. Further, when it is difficult to provide a low friction material on the lower steel plate of the bearing or the laminated rubber bearing due to construction, clad steel may be used for the bearing or the lower steel plate.

In the sliding bearing structure of the present invention, suspension members are fixed to a plurality of predetermined positions of a sliding surface which is a surface of the sliding plate made of clad steel, and a predetermined portion of the back surface of the sliding plate is fixed. It is preferable that locking members for locking the slide plate to the lower structure are fixed to the plurality of positions. In this way, when a concrete foundation is used for the lower structure, suspending members such as stud bolts and anchor bolts with heads are buried in the fluid concrete foundation while the sliding plate is suspended by a crane or the like, and By simply embedding the plate at a predetermined depth, the installation of the slide plate on the lower structure can be completed.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the sliding bearing structure according to the present invention will be described below with reference to the drawings. The sliding bearing structure of the present invention is to insulate the upper structure and the lower structure so that they can be displaced relative to each other. As shown in FIG.
It has a laminated rubber bearing 1 fixed to a building 2 as an upper structure, and a sliding plate 5 fixed to a concrete foundation 3 as a lower structure.

The laminated rubber bearing 1 is formed by alternately laminating a rubber layer 13 as a rubber-like elastic material and an intermediate steel plate 14 as a rigid material between an upper steel plate 11 and a lower steel plate 12. The low friction material 6 slidable on the lower steel plate 12
Affixed or surface treated. In the rubber layer 13,
Synthetic rubber such as natural rubber or chloroprene rubber having excellent elasticity is used.
The steel plate 2 and the intermediate steel plate 14 are usually made of a steel plate because of the adhesion to the rubber layer 13, but a nickel plate, a copper plate, a brass plate or a steel plate plated with nickel, copper, or brass can also be used. . In addition, the laminated rubber support 1
Is preferably vulcanized adhesion, but may be non-adhesion, partial adhesion or post-adhesion. The low friction material 6 is formed by coating the laminated rubber support 1 with a fluororesin such as polytetrafluoroethylene, or a plate made of a fluororesin, or
A polyacetal plate may be attached.

The sliding plate 5 is made of clad steel in order to slide the laminated rubber bearing 1 provided with the low friction material 6 on the sliding surface. The clad steel refers to a clad made of steel as a base material, in which a certain metal is coated over the front surface with another metal, and a boundary surface thereof is joined in a metallographic manner. Among such clad steels, stainless steel clad steel is preferable as the slide plate 5. Stainless clad steel is mainly manufactured by a rolling method, an explosion bonding method or a diffusion bonding method, and has a shear strength of 2 between the base material and the composite material.
000 kgf / cm ² or more, it is possible to secure sufficient strength against the sliding motion of the laminated rubber support 1 that supports a building or the like.

As a base material of the stainless steel clad steel, a rolled steel material for general structure (JIS G3101), particularly SS4
00, rolled steel materials for welded structures (JIS G 3106), particularly SM400 and SM490, and hot rolled stainless steel plates (JISG 4304) and cold rolled stainless steel plates (JIS G 4305), particularly SUS30, as composite materials
4, SUS316 is preferred. These are excellent in workability such as anticorrosion property and surface finish, and are inexpensive as compared with other base materials. On the other hand, the composite material 5a serving as the sliding surface of the sliding plate 5 has been subjected to processing or processing for maintaining flatness and smoothness. The flatness is set to 1/500 or less, preferably 1/1000 or less of the outer dimension, and the smoothness is set to 30 μm or less, preferably 3 μm or less, or equivalent to buffing with an abrasive having a particle size of 400, thereby reducing the flatness. Wear of the friction material 6 can be suppressed and a stable coefficient of friction can be obtained.

At a plurality of predetermined positions of the mating material 5a serving as the surface of the sliding plate 5, eyebolts and eye nuts 7 as hanging members as shown in FIG. Anchor bolts 8 for locking the sliding plate 5 to the concrete foundation 3 are welded, welded, fastened, or the like at predetermined positions of the base material 5b. For example, when an eyebolt is used as the suspension member, a female screw hole (not shown) for screwing the eyebolt is threaded into the base material 5b of the slide plate 5, and an eyenut is used as the suspension member. , A stud bolt or the like is fixed.

Incidentally, a stainless steel clad steel sheet which can be used as the sliding plate 5 is usually not subjected to surface treatment on its side surface, so that at least the side surface of the base material 5b has zinc rich paint, epoxy resin paint or the like. It is preferable to carry out a rust-proofing treatment. This makes it possible to prevent deterioration due to rust or the like even when the slide plate 5 is installed outdoors.

In order to install the building 2 on the concrete foundation 3 with such a sliding bearing structure, for example, a frame (see FIG. 1) surrounded by a formwork (not shown) and provided in advance on the concrete foundation 3 (Not shown), the slide plate 5 is moved while being suspended by a crane or the like, and is seated on the frame. Then, the level is adjusted in advance with horizontal level adjusting screws (for example, reference numeral 4 shown in FIG. 3) provided at the four corners of the slide plate 5 to secure a predetermined flatness of the slide plate 5, and then the slide plate 5 is placed in the mold. Pour a fixed amount of concrete. Thereby, the anchor bolt can be embedded and the slide plate can be embedded to a predetermined depth. Since the sliding plate 5 must be embedded with fluid concrete, it is preferable to form the cross section into a square or a polygon, preferably a round or an octagon, in consideration of workability.

When the concrete is solidified, the building 2
The laminated rubber bearing 1 provided with the low-friction material 6 on the lower surface thereof is fixed, and the building 2 on which the laminated rubber bearing 1 is fixed is placed on the sliding plate 5 to complete the assembly work of the sliding bearing structure. . As described above, the sliding plate 5 can be subjected to processing or processing for maintaining smoothness before being installed on the concrete foundation 3, and should be installed on the concrete foundation 3 without using an adhesive or a bolt. Therefore, management and handling during manufacturing and construction are facilitated. Therefore, stable sliding performance can be obtained.

In such a sliding bearing structure, similarly to the conventional elastic sliding bearing, the laminated rubber bearing 1 normally supports the vertical load of the building 2 without buckling, and the laminated rubber bearing 1 during a small or medium-sized earthquake. Absorbs seismic force due to horizontal deformation, and in the event of a large earthquake, the laminated rubber bearing 1 exceeds the amount of horizontal deformation, and the horizontal load applied to the laminated rubber bearing 1 exceeds the frictional force. Since it slides on the sliding plate 5, the period of the seismic isolation or the like can be lengthened.

In one embodiment of the present invention,
Although the laminated rubber bearing 1 in which the rubber layers 13 and the intermediate steel plates 14 are alternately laminated between the upper steel plate 11 and the lower steel plate 12 has been used, the present invention is not limited to this, and is made of, for example, only a rigid body such as a steel material. The support body can be slid on the slide plate 5 in the same manner. Further, when it is difficult to provide a low friction material on the lower steel plate of the support or the laminated rubber support due to the construction, clad steel may be used for the support or the lower steel plate. In this case, a low friction material is provided on the sliding plate.

[0021]

As described above, according to the sliding bearing structure of the present invention, if clad steel is used for the sliding plate, the base plate is not required for fixing to the lower structure. Since there is no need to perform assembly control and adhesive quality control, manufacturability can be improved. In addition, since processing or processing for maintaining smoothness can be performed before installing on the lower structure, workability can be improved. Therefore, stable sliding performance can be obtained.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing one embodiment of a sliding bearing structure of the present invention.

FIG. 2 is a partial detailed view of the sliding bearing structure of FIG. 1.

FIG. 3 is an explanatory view showing a conventional sliding bearing structure.

[Explanation of symbols]

 1 ... Laminated rubber bearing 2 ... Building (upper structure) 3 ... Concrete foundation (lower structure) 5 ... Sliding plate 5a ... · · · · · · · · · · Low friction material 7 · · · · eye bolts and eye nuts (suspension members) 8 · · · anchor bolts 11 · · · · upper steel plate 12 ... Lower steel plate 13 ... Rubber layer (rubber-like elastic body) 14 ... Middle steel plate (rigid material)

Claims (3)

[Claims] 1. A sliding bearing structure for vibrationally insulating an upper structure and a lower structure so as to be relatively displaceable with respect to each other, wherein: a bearing fixed to the upper structure or the lower structure;
A sliding plate fixed to the structure opposite to any one of the structures to which the support is fixed, and to which the support is abutted, wherein one of the support and the slide is slipped. Sliding bearing structure characterized in that low friction material is provided on the surface and clad steel is used on the other side. 2. A sliding bearing structure in which an upper structure and a lower structure are vibration-insulated so as to be relatively displaceable relative to each other, wherein a rubber-like elastic body and a rigid material are alternately laminated between an upper steel plate and a lower steel plate. A laminated rubber bearing fixed to the body, and a sliding plate fixed to the lower structure and contacting the laminated rubber bearing, wherein the lower steel plate or the sliding plate of the laminated rubber bearing is provided. A sliding bearing structure characterized in that a low friction material is provided on one of the sliding surfaces and clad steel is used on the other. 3. A hanging member is fixed to a plurality of predetermined positions on the sliding surface, which is a surface of the sliding plate using the clad steel, and a plurality of predetermined members on a back surface of the sliding plate. 3. The sliding bearing structure according to claim 1, wherein a locking member for locking the sliding plate to the lower structure is fixed at a position.