JP7071897B2 - Multi-sided slide bearing device for structures - Google Patents

Description

The present invention relates to a multi-sided slide bearing device for structures arranged between an upper structure and a lower structure of a structure such as a building or a bridge.

As a seismic isolation or vibration control bearing device for structures, a slide member with upper and lower surfaces as slide surfaces is placed between the upper structure and lower structure, and multi-sided slides for structures that reduce seismic energy by friction damping of the upper and lower slide surfaces. Bearings have been proposed.

Patent Document 1: Japanese Unexamined Patent Publication No. 2001-140976

Conventional multi-sided slide bearings for structures have problems that the structure is complicated, the number of parts is large, and the manufacturing cost is high. In addition, the reaction force at the start of sliding with respect to the relative displacement at the time of an earthquake increases by 20 to 30% as compared with the continuous slide character. The increased reaction force at the start of the slide causes a problem that parts such as mounting bolts designed by the reaction force at the time of continuous sliding are damaged.

In addition, there is a demand for stable seismic energy reduction effects for low-seismic earthquakes that occur frequently, and multi-faceted slide bearings for structures that can provide large seismic isolation against large earthquakes.

Further, there is a demand for multi-faceted slide bearings for structures capable of reducing the response acceleration by giving a time lag in the transmission of seismic energy to the superstructure or the substructure with respect to the relative displacement during an earthquake.

The present invention solves the problems of the prior art, has a simple structure, is slidable with respect to horizontal displacement in all directions acting during an earthquake, reduces the reaction force at the start of sliding of the sliding surface, and is low. It is an object of the present invention to provide a multi-faceted slide bearing device for structures, which has a stable seismic energy reduction effect for earthquakes of seismic intensity and a large brake is applied even for a large earthquake.

In the multi-sided slide support device for a structure of the present invention, in order to solve the above-mentioned problems, an upper member arranged on the lower side of the upper structure of the structure and a lower member arranged on the upper side of the lower structure of the structure , A rotational absorption elastic member in which an upper connecting steel plate and a lower connecting steel plate are integrated vertically and vertically arranged between the upper member and the lower member, and one of the upper member or the lower member is on the upper structure side or the lower structure side. The upper or lower connecting steel plate of the rotational absorption elastic member is fixed to the fixed upper or lower member, and the upper or lower connecting steel plate of the rotational absorption elastic member is not fixed. A first slide surface that can slide horizontally and omnidirectionally is formed between the member or the lower member, and can slide horizontally and omnidirectionally between the upper structure or the lower structure that comes into surface contact with the unfixed upper member or the lower member. It is characterized in that a second slide surface is formed and the friction coefficients of the first slide surface and the second slide surface are set differently.

Further, the multi-sided slide support device for structures of the present invention includes a first slide limiting member that constantly limits the horizontal omnidirectional slide of the slide surface having a small friction coefficient among the first slide surface and the second slide surface. It is characterized in that a second slide limiting member is provided, which restricts the slide in all horizontal directions of the slide surface having a large friction coefficient among the first slide surface and the second slide surface to a certain level.

Further, in the multi-sided slide bearing device for structures of the present invention, a cushioning member made of an elastic material for alleviating an impact due to a collision between an upper member or a lower member is arranged on the inner wall of the first slide limiting member and the second slide limiting member. It is characterized by.

Further, the multi-sided slide bearing device for structures of the present invention is characterized in that the friction coefficient between the first slide surface and the second slide surface surface is set in the range of 0.005 to 1.00.

An upper member arranged on the lower side of the upper structure of the structure, a lower member arranged on the upper side of the lower structure of the structure, and upper and lower upper connecting steel plates and lower connecting members arranged between the upper member and the lower member. A rotation-absorbing elastic member integrated with a steel plate is provided, and one of the upper member or the lower member is fixed to the upper structure side or the lower structure side, and the rotation-absorbing elastic member is upwardly connected to the fixed upper member or lower member. The steel plate or the lower connecting steel plate is fixed, and a horizontal omnidirectional slideable first slide surface is formed between the upper connecting steel plate or the lower connecting steel plate which is not fixed and which is in surface contact with the upper connecting steel plate or the lower connecting steel plate which is not fixed. A second slide surface that can slide horizontally in all directions is formed between the upper or lower member that is not fixed and the upper structure or the lower structure that comes into surface contact with each other, and the friction coefficient between the first slide surface and the second slide surface. By setting differently, the first slide surface and the second slide surface start sliding with a time lag with respect to the horizontal displacement at the time of an earthquake, so it is possible to reduce the reaction force at the start of the slide. , It is possible to reduce the response acceleration. In addition, a stable seismic energy reduction effect for low-seismic earthquakes and a large braking effect for large earthquakes are possible.
A first slide limiting member is provided to limit the horizontal omnidirectional slide of the slide surface having a small friction coefficient between the first slide surface and the second slide surface, and the friction between the first slide surface and the second slide surface is provided. By providing a second slide limiting member that constantly limits the slide in all horizontal directions on the slide surface with a large coefficient, it is possible to stably attenuate seismic energy even for small earthquakes and large earthquakes. Become.
By arranging a cushioning member made of an elastic material that cushions the impact caused by the collision of the upper member or the lower member on the inner walls of the first slide limiting member and the second slide limiting member, damage to the slide limiting member due to the collision is prevented.
By setting the coefficient of friction between the first slide surface and the second slide surface in the range of 0.005 to 1.00, it is possible to correspond to the required reduction range of the response acceleration.

It is a figure which shows the embodiment of this invention. It is a figure which shows the embodiment of this invention. It is a figure which shows the embodiment of this invention. It is a figure which shows the embodiment of this invention.

The mobile phone for carrying out the present invention will be described with reference to the drawings. 1, FIG. 2, and FIG. 3 are views showing an embodiment of the multi-sided slide bearing device for structures of the present invention.

The multi-sided slide bearing device 1 for a structure is arranged between the lower structure 2 and the upper structure 3 of a structure such as a building or a bridge.

In the embodiment shown in the figure, the lower member 4 is fixed on the lower structure 2 by the anchor bolt 5. The superstructure 6 is arranged under the superstructure 3 without being fixed.

Between the upper member 6 and the lower member 4, a rotational absorption elastic member 7 formed of a material such as rubber in which an upper connecting steel plate 8 is integrated on the upper portion and a lower connecting steel plate 9 is integrated on the lower portion by vulcanization molding is arranged.

The lower connecting steel plate 9 of the rotational absorption elastic member 7 is fixed to the lower member 4 with a fixing bolt 10. The upper connecting steel plate 8 of the rotational absorption elastic member 7 and the lower surface of the upper member 6 which is not fixed are in surface contact with each other to form a first slide surface 11 in which the upper member 6 slides with respect to displacement in all horizontal directions.

The upper surface of the unfixed upper member 6 and the lower surface of the upper structure 3 are in surface contact with each other to form a second sliding surface 12 on which the upper member 6 is slidable with respect to displacement in all horizontal directions.

A low friction material 13 such as polytetrafluoroethylene is arranged on the lower surface and the upper surface of the upper member 6. It is desirable to dispose a low friction material such as stainless steel on the lower surface of the superstructure 3 and the surface of the upper connecting steel plate 8.

The coefficient of friction between the first slide surface 11 and the second slide surface 12 is set in the range of 0.005 to 1.00. For the friction coefficient between the first slide surface 11 and the second slide surface 12, the friction coefficient on the side where the response acceleration is desired to be reduced is set to be larger than the friction coefficient on the other slide surface. For example, when it is desired to reduce the response acceleration of the superstructure 3, the friction coefficient of the second slide surface 12 is set to be larger than the friction coefficient of the first slide surface 11. The difference in the magnitude of the coefficient of friction between the first slide surface 11 and the second slide surface 12 is set by the required reduction range of the response acceleration.

In the embodiment shown in the figure, the upper member 6 is not fixed and is slidable in all directions. However, the upper member 6 is fixed under the upper structure 3 with a set bolt or the like, and the upper connecting steel plate of the rotational absorption elastic member 7 is formed. 8 may be fixed to the upper member 6 and slidable in all horizontal directions without fixing the lower member 4.

When the lower member 4 is not fixed and is slidable in all horizontal directions, the upper surface of the lower member 4 and the lower connecting steel plate 9 of the rotational absorption elastic member 7 are in surface contact with each other and the first slide surface 11 is slidable in all horizontal directions. Is formed, and the lower surface of the lower member 4 and the upper surface of the lower structure 2 are in surface contact with each other to form a second slide surface 12 that can slide in all horizontal directions.

In order to limit the horizontal omnidirectional slide of the upper member 6 on the first slide surface 11 having a small friction coefficient to a certain range, the horizontal omnidirectional slide of the upper member 6 to the lower member 4 or the lower structure 2 is limited to a certain range. The first slide limiting member 14 to be restricted is fixed so as to surround the entire circumference of the upper member 6. A cushioning member 15 made of a material such as rubber that absorbs the impact caused by the collision of the upper member 6 is arranged on the inner wall of the first slide limiting member 14.

In order to limit the horizontal omnidirectional slide of the upper member 6 on the second slide surface 12 having a large friction coefficient to a certain range, the upper structure 3 limits the horizontal omnidirectional slide of the upper member 6 to a certain range. The slide limiting member 16 is fixed as a set so as to surround the entire circumference of the upper member 6. A cushioning member 15 made of a material such as rubber that absorbs the impact caused by the collision of the upper member 6 is arranged on the inner wall of the second slide limiting member 16.

As shown in FIG. 3, the second slide limiting member 16 that restricts the horizontal omnidirectional slide of the upper member 6 on the second slide surface 12 having a large friction coefficient is mounted on the upper part of the first slide surface 11 having a small friction coefficient. Member 6 Arranged outside the first slide limiting member 14 that limits sliding in all horizontal directions.

The operation of the multi-sided slide bearing device 1 for a structure configured as described above will be described.

During an earthquake, when horizontal stress is applied to the multi-sided slide support device 1 for structures during an earthquake, the upper member 6 starts sliding relative to the lower member 4 via the first slide surface 11 having a small coefficient of friction. Then, when the upper member 6 reaches the first slide limiting member 14, the upper member 6 relatively starts sliding through the second slide surface 12 having a large friction coefficient.

In the case of small and medium-sized earthquakes that occur frequently, the seismic energy is attenuated by sliding the upper member 6 in all horizontal directions on the first slide surface 11 having a small coefficient of friction. Since the superstructure 3 moves integrally with the superstructure 6 until the slide on the second slide surface 12 having a large coefficient of friction of the superstructure 6 starts, seismic energy is not transmitted to the superstructure 3.

In the case of a level 2 class large earthquake, the upper member 6 collides with the first slide limiting member 14. Since the cushioning member 15 for alleviating the impact caused by the collision of the upper member 6 is arranged on the inner wall of the first slide limiting member 14, the first slide limiting member 14 is not destroyed by the collision of the upper member 6.

When the upper member 6 reaches the first slide limiting member 14, the upper member 6 starts to slide in all horizontal directions via the second slide surface 12 having a large coefficient of friction, and the seismic energy can be significantly alleviated. It will be possible.

Since the slide of the upper member 6 via the first slide surface 11 and the second slide surface 12 is started with a time lag with respect to the horizontal displacement at the time of an earthquake, the upper member 6 has the first slide surface 11 and the upper member 6. It is possible to reduce the reaction force at the start of the slide as compared with the case where the slide is started at the same time via the second slide surface 12.

Further, since the upper member 6 starts sliding via the first slide surface 11 and the second slide surface 12 with a time lag, it is possible to reduce the response acceleration of the upper structure 3.

According to the multi-sided slide bearing device 1 for structures of the present invention, a stable seismic energy reduction effect for low seismic intensity earthquakes and a large braking effect for large earthquakes are possible.

FIG. 4 is a diagram illustrating the operation and effect of the multi-sided slide bearing device for structures. During an earthquake, when horizontal stress is applied to the multi-sided slide support device 1 for structures during an earthquake, the upper member 6 starts sliding relative to the lower member 4 via the first slide surface 11 having a small coefficient of friction. Then, when the upper member 6 reaches the first slide limiting member 14, the upper member 6 relatively starts sliding through the second slide surface 12 having a large friction coefficient. For a level 1 class small displacement earthquake, the upper member 6 is absorbed by the slide at a distance of L1 reaching the first slide limiting member 14 by the relative slide on the first slide surface 11 having a small friction coefficient.

For the displacement of a large-scale earthquake of level 2 class, the upper member 6 reaches the first slide limiting member 14 by sliding through the first slide surface 11 having a small friction coefficient, and the second slide surface 12 having a large friction coefficient. The relative slide starts through the slide, and the upper member 6 absorbs the slide at a distance of L2 reaching the second slide limiting member 16.

As described above, according to the multi-sided slide bearing device 1 for structures of the present invention, the slides via the first slide surface 11 and the second slide surface 12 slide with a time lag with respect to the horizontal displacement at the time of an earthquake. Since it starts, it is possible to reduce the reaction force at the start of the slide, and it is possible to reduce the response acceleration. In addition, a stable seismic energy reduction effect for low-seismic earthquakes and a large braking effect for large earthquakes are possible.

1: Multi-sided slide support device for structures 2: Lower structure 3: Upper structure 4: Lower member 5: Anchor bolt, 6: Upper member, 7: Rotational absorption elastic member, 8: Upper connecting steel plate, 9: Lower connecting steel plate, 10: fixing bolt, 11: first slide surface, 12: second slide surface, 13: low friction material, 14: first slide limiting member, 15: cushioning material, 16: second slide limiting member, 17: Set bolt

Claims (4)

The superstructure placed under the superstructure of the structure and the superstructure
The lower member placed above the lower structure of the structure and the lower member
A rotational absorption elastic member in which an upper connecting steel plate and a lower connecting steel plate are integrated vertically, which are arranged between the upper member and the lower member.
Equipped with
One of the upper member or the lower member is fixed to the upper structure or the lower structure, and the upper connecting steel plate or the lower connecting steel plate of the rotational absorption elastic member is fixed to the fixed upper member or the lower member, and the upper connecting steel plate or the lower connecting steel plate of the rotational absorption elastic member is fixed. An upper structure that forms a horizontal omnidirectional slidable first sliding surface between a non-fixed upper member or lower member that comes into surface contact with a connecting steel plate or a lower connecting steel plate, and makes surface contact with an unfixed upper member or lower member. Alternatively, a multi-sided slide support for structures is characterized in that a second slide surface that can slide in all directions horizontally is formed between the lower structure and the first slide surface and the second slide surface are set to have different friction coefficients. Device. A first slide limiting member is provided to limit the horizontal omnidirectional slide of the slide surface having a small friction coefficient between the first slide surface and the second slide surface, and the friction between the first slide surface and the second slide surface is provided. The multi-sided slide support device for a structure according to claim 1, further comprising a second slide restricting member that constrains the slide in the horizontal omnidirectional direction of the slide surface having a large coefficient to be constant. The structure according to claim 1 or 2, wherein a cushioning member made of an elastic material that cushions an impact due to a collision between an upper member or a lower member is arranged on an inner wall of a first slide limiting member and a second slide limiting member. Multi-sided slide bearing device for use. The multi-faceted slide bearing device for a structure according to any one of claims 1 to 3, wherein the friction coefficient between the first slide surface and the second slide surface is set in the range of 0.005 to 1.00. ..

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