JP6123014B1 - Energy absorption type bearing - Google Patents

Abstract

[PROBLEMS] To freely control high initial rigidity and slip resistance, and furthermore, in the event of an earthquake or the like, a desired energy absorption performance can be obtained even when a vertical load from an upper structure composed of a roof frame or the like greatly fluctuates. To provide an energy absorbing bearing that can be used. An energy absorbing support 100 that connects a lower structure BF and an upper structure RF, and is disposed between a base plate 1 having two protrusions 2 and two protrusions 2 on the base plate 1. The slider 3, the base plate 1, the first anchor bolt 6 that connects the slider 3 and the lower structure BF, and the unsupported area Ca that is not supported by the lower structure BF, are disposed between the base plate 1 and the slider 3. It comprises a friction resistance plate 4 interposed therebetween, a second anchor bolt 7a that connects the base plate 1, the friction resistance plate 4 and the slider 3, and an axial force adjusting member 7b attached to the second anchor bolt 7a. [Selection] Figure 3

Description

  The present invention relates to an energy-absorbing support that connects a lower structure composed of an RC structure or an SRC structure such as a frame structure and an upper structure composed of an S structure roof structure supported by the lower structure. .

  In the Great East Japan Earthquake that occurred in 2011, there were many damages such as damage to the support parts of the S-structure roof frame (upper structure) and RC support frame (lower structure) that supported the gymnasium. It was. When seismic waves are input to the lower structure, an excessive out-of-plane response occurs in the lower structure in the direction where the horizontal rigidity is low, and this out-of-plane response propagates to the roof structure, which is the upper structure. As a result, one of the causes is that the alternating load is applied to the bearing.

  Public facilities with a large capacity, such as gymnasiums, play an important role as evacuation facilities for natural disasters such as typhoons and earth and sand disasters, in addition to the original function of indoor exercise areas. . Therefore, it is extremely important to continue the role and function as an evacuation facility during the recovery and reconstruction period of the local infrastructure and damaged houses after a natural disaster without being damaged during a natural disaster.

  Currently, research is being conducted to reduce the response during earthquakes by using an elasto-plastic type energy absorbing bearing for RC cantilever frame bearings such as gymnasium roofs. With this technology, the initial stiffness of the bearing is increased, and a higher response reduction effect is expected when the slip strength (static friction force) is in a limited range. Therefore, the initial stiffness is high and the impact resistance can be freely controlled. Development of a plastic energy absorbing bearing is desired in the art.

  Here, turning to the public technology, Patent Document 1 has a function of allowing relative horizontal displacement between the roof frame and the support structure and a function of generating a damping force at the time of relative horizontal displacement. A seismic isolation device is installed, causing at least a certain amount of relative displacement between the roof frame and the support structure in the direction where the horizontal rigidity of the support structure is low, and the roof frame and the support structure in a direction where the horizontal rigidity is high. A seismic isolation structure is disclosed in which a horizontal force is applied to the seismic isolation device and a damping force is generated while allowing relative displacement between them. In this seismic isolation structure, a steel rod damper or a curved steel plate damper is applied as an energy absorbing material.

  According to the seismic isolation structure disclosed in Patent Document 1, it is possible to reduce the transmission of the horizontal force in the direction of low horizontal rigidity input to the support structure to the roof frame and to avoid forced deformation to the roof frame. It is said.

  However, the rigidity and proof stress of a steel rod damper or a curved steel plate damper applied as an energy absorbing material are closely related to the shape of the damper. Therefore, it is extremely difficult to freely control the slip strength under the above-described problem, that is, the condition that the initial rigidity is high.

  Further, Patent Document 2 discloses a sliding support composed of a sliding material in which a polyamide resin containing a filler is inserted into a holding plate and a coated sliding plate.

  According to the sliding bearing disclosed in Patent Document 2, the friction coefficient can be controlled within the optimum range, and the earthquake resistance is improved.

  By the way, the above-mentioned sliding bearing generates a frictional force by the vertical load shared by the bearing and absorbs seismic energy by this frictional force. For example, the sliding bearing is loaded on the sliding bearing, for example, by a roof frame such as a gymnasium. Since the vertical load varies greatly depending on the seismic response, it is difficult to stably absorb the seismic energy by generating a stable friction force during an earthquake, and there is a big difference between the design value and the actual energy absorption performance. Is considered to exist.

JP 2005-344508 A JP 2006-161840 A

  The present invention has been made in view of the above-described problems, and enables high initial rigidity and free control of slip strength. Further, in the event of an earthquake or the like, a vertical load from an upper structure composed of a roof frame or the like is generated. An object of the present invention is to provide an energy absorption type bearing that can exhibit desired energy absorption performance even when greatly fluctuating.

  In order to achieve the above object, an energy absorbing bearing according to the present invention is an energy absorbing bearing that connects a lower structure and an upper structure, a part of which is supported by the lower structure, and two protrusions on the upper surface. A base plate having a plurality of bolt holes, a first bolt long hole and a second bolt long hole, disposed on the base plate and between the two convex portions, A slider on which the load of the structure is directly loaded, the bolt hole of the base plate and the first bolt long hole of the slider, and a part of the slider is embedded in the lower structure so that the base plate and the slider And a first anchor bolt that connects the lower structure, and a bolt hole, and is disposed in an unsupported region of the base plate that is not supported by the lower structure, A friction resistance plate interposed between a base plate and the slider, a second anchor bolt inserted through a corresponding bolt hole of the base plate and the friction resistance plate, and a second bolt long hole of the slider; An axial force adjusting member attached to two anchor bolts, and the movement of the slider toward the convex portion is restricted by the two convex portions, and the base plate and the slider are controlled by the axial force adjusting member. The compression force of the frictional resistance plate is adjusted.

  In the energy absorption type support of the present invention, a friction resistance plate is disposed in an unsupported region (that is, a region in which there is no reaction force from below) of the base plate that is not supported by the lower structure. By compressing the frictional resistance plate with the compressive force, a constant frictional resistance force can be expected in the event of an actual earthquake or the like without depending on the weight fluctuation from the upper structure.

  In addition, since the movement of the slider toward the convex portion side is regulated by the two convex portions, the slider moves toward the convex portion side during an earthquake, and the reaction force is transmitted from the side surface of the slider to the convex portion. Therefore, it is eliminated that the first anchor bolt bites into the side surface of the first bolt long hole of the slider and the first anchor bolt and the slider are damaged.

  Note that the two protrusions and the side surface of the slider may be a metal touch, and although a slight clearance is provided, this clearance is greater than the clearance between the first bolt elongated hole and the first anchor bolt. By making it small, it can suppress that a 1st anchor bolt collides with the side surface of a 1st bolt long hole, and is damaged by an action reaction force.

  Here, the lower structure is composed of RC frame (steel reinforced concrete) or SRC frame (steel reinforced concrete structure), and the upper structure is composed of S frame (steel frame) roof frame fixed to the slider. Thus, the roof is constructed by laying plate materials such as steel and metal and sheet materials of various materials on the roof frame. Further, examples of the structure to which the energy absorption type support of the present invention having these structures is installed include a gymnasium as described above, a library, a public building of a local government, various amusement facilities, and the like. A bridge in which the lower structure is a bridge pier or an abutment and the upper structure is a bridge girder can also be a structure to which the energy absorbing bearing of the present invention is installed.

  Further, by adjusting the compression force of the frictional resistance plate by the base plate and the slider as desired with the axial force adjusting member, an energy absorption type bearing capable of freely controlling high initial rigidity and slip resistance can be obtained.

  In addition, since the slip resistance with high initial rigidity and the plastic behavior that absorbs energy by moving horizontally while exhibiting dynamic friction force in the region exceeding the slip resistance, the energy absorption of the present invention is performed. The mold support can also be referred to as an elastoplastic damper or a rigid plastic damper having a high initial rigidity.

  When an out-of-plane response occurs to an energy absorbing bearing during an earthquake, both the slider that supports the weight of the upper structure and the frictional resistance plate located below the slider both cause vibrations in the lower structure. Vibrates in response.

  At this time, the energy absorption type bearing has only a slight horizontal movement in the static friction region up to the sliding resistance of the frictional resistance, and the frictional resistance plate moves horizontally while generating a dynamic frictional force in the region exceeding the sliding resistance. become. That is, in the energy absorption type support composed of the base plate and the slider and the friction resistance plate sandwiched between them by a predetermined compressive force, the entire support behaves integrally from the static friction region to the dynamic friction region.

  The first anchor bolt embedded in the lower structure and connecting the base plate and the slider to the lower structure is inserted into the first bolt long hole of the slider. It arrange | positions in the aspect orthogonal to the structural surface of a structure. Since the horizontal direction of the lower structure has high horizontal rigidity, there is almost no horizontal movement of the base plate, and the energy absorption type bearing is structurally a pin bearing with respect to the lower structure.

  On the other hand, since the horizontal rigidity is low in the direction perpendicular to the surface of the lower structure, only a slight horizontal movement occurs in the static friction region in this direction due to the frictional force of the frictional resistance plate, exceeding the slip resistance. In the region, it is possible to effectively absorb energy by horizontally moving the slider.

  Here, a disc spring, a leaf spring, a coil spring, a hard rubber, or the like can be applied to the axial force adjusting member. By applying these members, a high-performance energy-absorbing bearing can be achieved at a relatively low cost. Can be produced.

  Further, in a preferred embodiment of the energy absorption type support according to the present invention, the convex portion is provided with a bolt hole, and a third anchor bolt is inserted into the corresponding bolt hole of the base plate and the convex portion, so that the base plate On the other hand, the convex portion is fixed.

  When installing a slider between convex parts, since both generally become a metal touch, it takes time and effort to insert and install the slider between two convex parts fixed to the base plate. Therefore, after arranging the slider on the base plate, it is possible to easily install the slider between the convex portions by bolting the two convex portions to the base plate later.

  In addition, another embodiment of the energy absorption type support according to the present invention includes a bolt hole, and further includes a connecting material that connects the convex portion and the slider, and the correspondence between the base plate, the convex portion, and the connecting material. The third anchor bolt is inserted into each bolt hole to fix the connecting material to the convex portion, and the bolt hole is formed between the slider and the connecting material at a position corresponding to the friction resistance plate. Provided with a separate friction resistance plate, and the second anchor bolt is inserted into the corresponding bolt holes of the base plate, the friction resistance plate, the slider, the additional friction resistance plate, and the connecting material. And the axial force adjusting member compresses the friction resistance plate with the base plate and the slider, and the slider and the connection. Wherein those which are adjusted both compressive force of additional frictional resistance plates by wood.

  In the energy absorption type support of the present embodiment, two types of friction resistance plates (a friction resistance plate and a separate friction resistance plate) are arranged in the vertical direction, and one friction resistance plate is sandwiched between a base plate and a slider, while the other Energy that can exert even greater frictional resistance by sandwiching the separate frictional resistance plate between the slider and the connecting material fixed to the convex part, and compressing both frictional resistance plates with a predetermined compression force Absorption type bearing.

  An energy absorption type in which three or more types of friction resistance plates are arranged in the vertical direction by projecting a plurality of connecting materials from the convex portion and disposing a friction resistance plate between the connecting material and other components. A bearing can also be formed.

  Any of the first anchor bolt, the second anchor bolt, and the third anchor bolt described above can be mounted on site. For this reason, for example, the anchor bolts are left on the site from the start of the construction of the lower structure to the construction of the upper structure such as the roof frame, and the problem of rusting and rusting does not occur.

  As can be understood from the above description, according to the energy absorption type support of the present invention, the friction resistance plate is disposed in the non-supporting region of the base plate that is not supported by the lower structure, and the slider and the base plate are desired. By compressing the frictional resistance plate with the compressive force, a desired energy absorption performance can be exhibited in the event of an actual earthquake or the like without depending on the weight fluctuation from the upper structure. Furthermore, by applying a configuration in which a friction resistance plate, which is expected to have frictional resistance with the lower structure, is pressed against the lower structure with a desired compression force by the axial force adjusting member, a high initial Free control of rigidity and slip strength becomes possible.

It is an external appearance structural view of the gymnasium to which the energy absorption type support of this invention is applied. (A) is the schematic diagram explaining the composition direction in the wife's face of a gymnasium, and a perpendicular direction of a composition, (b) is the schematic diagram explaining the composition direction in the girder plane of a gymnasium, and a composition orthogonal direction. . It is a disassembled perspective view of Embodiment 1 of the energy absorption type bearing of this invention. It is the perspective view seen from diagonally upward of Embodiment 1 of an energy absorption type support. It is the perspective view seen from diagonally downward of Embodiment 1 of an energy absorption type support. It is a disassembled perspective view of Embodiment 2 of the energy absorption type bearing of this invention. It is the perspective view seen from diagonally upward of Embodiment 2 of an energy absorption type support. It is the perspective view seen from diagonally downward of Embodiment 2 of an energy absorption type support. It is a longitudinal cross-sectional view of Embodiment 3 of the energy absorption type bearing of this invention.

  Hereinafter, Embodiments 1 to 3 of the energy absorption type support of the present invention will be described with reference to the drawings. In the illustrated example, the energy absorption type support is applied between the support frame and the roof frame of the gymnasium. However, the energy absorption type support of the present invention is a structure other than the gymnasium, particularly various types of roof frames. It can be applied to public facilities, competition facilities, amusement facilities, and can also be applied to bridges. Moreover, although the example of illustration has shown the form by which a convex part is bolt-fixed with respect to a base plate, you may apply what formed the base plate and the convex part integrally.

(Embodiment 1 of energy absorption type bearing)
First, the structure of a gymnasium will be described as a structure to which the energy absorption type support of the present invention is applied with reference to FIGS.

  The illustrated gymnasium has six RC pillars C (which may be SRC pillars) on the wife's face (numbered 1 to 6 in FIG. 1), and two RC pillars in the horizontal direction perpendicular to each RC pillar C. An RC frame having a beam B (which may be an SRC beam) and having a plurality of rectangular openings is composed of the plurality of RC columns C and the RC beam B, and earthquake resistant walls W are arranged in some of the rectangular openings. The support structure BF which is the lower structure of the end face is constituted by the RC column C, the RC beam B, and the seismic wall W.

  On the other hand, the girder face of the gymnasium has eight RC pillars C ′ (which may be SRC pillars) with a predetermined interval between the end faces (RC pillars C located at both ends) (FIG. 1). , The alphabetical parts B to I), and two RC beams B (which may be SRC beams) in the horizontal direction orthogonal to each RC column C ′, and a plurality of these RC columns C ′ and RC beams B The RC-RC frame with rectangular openings is constructed, and some of the rectangular openings have a structure in which the seismic walls W are arranged. The RC column C ′, the RC beam B, and the seismic wall W The support frame BF which is the lower structure of the girder surface is constructed.

  Thus, in the gymnasium, the support frame BF (lower structure) that supports the roof frame RF (upper structure) is made of RC or SRC. In the illustrated gymnasium, RC floors are arranged on the first floor (1FL) and the second floor (2FL), respectively.

  As shown in FIGS. 1 and 2a, the wife surface has a high horizontal rigidity in the direction of the surface (X direction in FIG. 1) and a low horizontal rigidity in the direction perpendicular to the surface (in FIG. 1). As shown in FIGS. 1 and 2b, the horizontal plane has a high horizontal rigidity in the plane direction (Y direction in FIG. 1) and a low horizontal rigidity in the direction perpendicular to the plane of the plane (Y direction). (X direction in FIG. 1).

  On the other hand, the roof frame RF supported by the support frame BF includes an S structure frame having a plurality of rectangular openings from a steel large beam BB and a steel small beam SB, and a steel brace BR is provided in each rectangular opening. The roof frame RF is composed of the S-shaped large beam BB, the small beam SB, and the brace BR. In addition, although illustration is abbreviate | omitted, a steel plate and a sheet | seat material are laid by the roof frame RF, and a roof is comprised. Thus, the roof frame is relatively lightweight due to the S-structure frame structure.

  As shown in FIG. 1, FIG. 2a, b, the energy absorption type support is placed on the RC beam B of the roof frame RF, which is the upper structure constituting the girder surface and the girder surface of the support frame BF, which is the lower structure. Installed. Hereinafter, in the description of the energy absorption type support, a mode in which the energy absorption type support according to each embodiment is disposed between the column C constituting the lower structure and the upper structure will be described.

  Next, with reference to FIGS. 3-5, Embodiment 1 of the energy absorption type support of this invention is demonstrated. Here, FIG. 3 is an exploded perspective view of the first embodiment of the energy absorbing bearing according to the present invention, and FIG. 4 is a perspective view of the first embodiment of the energy absorbing bearing as viewed from diagonally above. These are the perspective views seen from diagonally downward of Embodiment 1 of an energy absorption type support.

  As shown in FIG. 3, the energy absorption type support 100 includes a base plate 1 partially supported by a column C constituting the lower structure, two convex portions 2 fixed to the base plate 1, and a base plate 1. The slider 3 is disposed between the two convex portions 2 and directly loaded with the load of the upper structure, and the two left and right frictional resistance plates 4 interposed between the base plate 1 and the slider 3. It is configured. It should be noted that a hollow sphere (not shown) constituting the upper structure RF is fitted into the sphere 3c disposed in the center of the slider 3 so that the slider 3 and the upper structure RF can be connected movably.

  The base plate 1 includes a plurality of bolt holes 1 a, 1 b, 1 c, the slider 3 includes a first bolt long hole 3 a and a second bolt long hole 3 b, and the first anchor bolt 6 is the first bolt of the slider 3. The bolt long hole 3a and the bolt hole 1a of the base plate 1 are inserted, and a part of the first anchor bolt 6 is embedded in the column C to connect the base plate 1 and the slider 3 to the column C.

  The friction resistance plate 4 includes a bolt hole 4a, is interposed between the base plate 1 and the slider 3, and is disposed in an unsupported region Ca that is not supported by the column C in the base plate 1.

  A second anchor bolt 7a is inserted into the corresponding bolt holes 1b and 4a of the base plate 1 and the friction resistance plate 4 and the second bolt long hole 3b of the slider 3, and a shaft is attached to the head of the second anchor bolt 7a. A force adjusting member 7b is attached to fix these three kinds of members.

  More specifically, stainless plates 5A and 5B and a PTFE plate 5C are disposed between the friction resistance plate 4 and the slider 3, and the bolt holes 5Aa of the stainless plate 5A and the bolt holes 5Ca of the PTFE plate 5C are formed on the slider 3. Corresponding to the first bolt long hole 3a, the bolt long hole 5Ba of the stainless steel plate 5B corresponds to the second bolt long hole 3b of the slider 3.

  The convex part 2 has a bolt hole 2a, and the third anchor bolt 8a is inserted into the corresponding bolt hole 1c, 2a of the base plate 1 and the convex part 2 and is tightened with a nut 8b. Part 2 is fixed.

  When installing the slider 3 between the convex portions 2, since both are generally metal touches, it takes time to insert the slider between the two convex portions 2 fixed to the base plate 1. Therefore, by arranging the slider 3 on the base plate 1 and then bolting the two convex portions 2 to the base plate 1 later, the slider 3 can be easily installed between the convex portions 2.

  As shown in FIG. 3, since the first anchor bolt 6, the second anchor bolt 7a, and the third anchor bolt 8a are all attached at the site, the roof frame and the like from the start of the frame construction of the lower structure BF Each anchor bolt is left on site until the construction of the upper structure RF, and there is no problem of rusting and rusting.

  Since the slider 3 is disposed between the two convex portions 2 on the base plate 1, the movement of the slider 3 toward the convex portion 2 is restricted. On the other hand, since the first anchor bolt 6 is inserted through the first bolt elongated hole 3a of the slider 3, the movement of the slider 3 in the longitudinal direction of the first bolt elongated hole 3a is guaranteed.

  Further, since the movement of the slider 3 toward the convex portion 2 side is regulated by the two convex portions 2, the slider 3 moves toward the convex portion 2 side at the time of an earthquake, and the reaction force is transmitted from the side surface of the slider 3 to the convex portion 2. The Therefore, the problem that the first anchor bolt 6 bites into the side surface of the first bolt elongated hole 3a of the slider 3 and the first anchor bolt 6 and the slider 3 are damaged does not occur.

  In addition, an energy absorbing type capable of freely controlling high initial rigidity and slip resistance by adjusting the compression force of the friction resistance plate 4 by the base plate 1 and the slider 3 as desired by an axial force adjusting member 7b made of a disc spring. A bearing 100 can be formed. As the axial force adjusting member 7b, a plate spring, a coil spring, hard rubber or the like can be applied in addition to the disc spring.

  The energy absorption type support 100 is disposed in the lower structure BF such that the longitudinal direction of the first bolt long hole 3a of the slider 3 is perpendicular to the surface of the lower structure BF. Is done. Since the horizontal structural direction of the lower structural body BF is high, the base plate 1 hardly moves horizontally, and the energy absorbing support 100 is a pin support in terms of structure with respect to the lower structural body BF. On the other hand, since the horizontal rigidity is low in the direction perpendicular to the surface of the lower structural body BF, only a slight horizontal movement occurs in this direction until the slip strength due to the frictional force of the frictional resistance plate 4, and the region exceeds the slip strength. In, energy can be effectively absorbed by moving the slider 3 horizontally.

  Moreover, according to the energy absorption type support 100, the friction resistance plate 4 is not supported in the unsupported area Ca (that is, the area where there is no reaction force from below) that is not supported by the column C constituting the lower structure BF. By compressing the frictional resistance plate 4 with a desired compression force by the slider 3 and the base plate 1, it is constant during an actual earthquake or the like without depending on the weight fluctuation from the upper structure RF. The frictional resistance can be expected.

(Embodiment 2 of energy absorption type bearing)
FIG. 6 is an exploded perspective view of the second embodiment of the energy absorbing bearing according to the present invention, FIG. 7 is a perspective view of the second embodiment of the energy absorbing bearing as seen from diagonally above, and FIG. It is the perspective view seen from diagonally downward of Embodiment 2 of type | mold support.

  The energy absorbing support 100A according to the second embodiment enables generation of a larger frictional resistance force by arranging two frictional resistance plates 4 and 4A on the upper and lower sides (a total of four frictional resistance plates). Is.

  Specifically, a bolt 9 is provided with a connecting member 9 that connects the convex portion 2 and the slider 3 with the bolt holes 9a, 9b, and the corresponding bolt holes 1c, 2a, 9b of the base plate 1, the convex portion 2, and the connecting member 9 are provided. The third anchor bolt 8 a is inserted, and the connecting material 9 is fixed to the convex portion 2.

  A separate friction resistance plate 4A having a bolt hole 4Aa is disposed between the slider 3 and the connecting material 9 at a position corresponding to the lower friction resistance plate 4, and the base plate 1, the friction resistance plate 4 and the slider 3 are disposed. The second anchor bolt 7a is inserted into the corresponding bolt holes 1b, 4a, 3b, 4Aa, 9a of the separate friction resistance plate 4A and the connecting material 9, and the axial force adjusting member 7b is used by the base plate 1 and the slider 3. Both the compression force of the friction resistance plate 4 and the compression force of the separate friction resistance plate 4A by the slider 3 and the connecting material 9 are adjusted.

(Embodiment 3 of energy absorbing bearing)
FIG. 9 is a longitudinal sectional view of Embodiment 3 of the energy absorbing bearing of the present invention, and is an enlarged view of only the right end portion of the energy absorbing bearing. In the energy absorption type support 100B according to the third embodiment, the central connecting material 9A is disposed between the convex portions 2A divided in the vertical direction, and the additional connecting material 9 is disposed on the upper surface of the upper convex portion 2. These are fixed together with the base plate 1 with a third anchor bolt 8a and a nut 8b.

  On the other hand, a slider is formed from two upper and lower divided pieces 3A and another divided piece 3B that is interposed between these divided pieces 3A and is relatively receded from the convex portion 2A side, and a connecting material 9, 9A and the divided piece 3A are wrapped, and friction resistance plates 4, 4A, 4B, and 4C are interposed in four spaces formed between the members, and joined by the second anchor bolt 7a and the axial force adjusting member 7b. Yes.

  According to the energy absorption type support 100B, by arranging the four friction resistance plates 4, 4A, 4B, 4C on the upper and lower sides (a total of eight friction resistance plates), it is possible to generate an even greater frictional resistance force. it can.

  The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and there are design changes and the like without departing from the gist of the present invention. They are also included in the present invention.

  DESCRIPTION OF SYMBOLS 1 ... Base plate, 1a, 1b, 1c ... Bolt hole, 2, 2A ... Convex part, 2a ... Bolt hole, 3 ... Slider, 3A, 3B ... Divided piece (slider), 3a ... First bolt long hole, 3b ... 2nd bolt long hole, 3c ... sphere, 4, 4A, 4B, 4C ... friction resistance plate, 4a, 4Aa ... bolt hole, 6 ... first anchor bolt, 7a ... second anchor bolt, 7b ... axial force Adjustment member (disc spring), 8a ... third anchor bolt, 8b ... nut, 9, 9A ... tie material, 100, 100A, 100B ... energy absorption type support (support), RF ... upper structure (roof frame), BF ... Lower structure (supporting frame), C ... Column, Ca ... Unsupported area

Claims (4)

An energy absorbing bearing connecting the lower structure and the upper structure,
A part of the lower structure is supported, a base plate having two protrusions on the upper surface, and a plurality of bolt holes;
A slider having a first bolt elongated hole and a second bolt elongated hole, disposed on the base plate and between the two convex portions, and on which a load of the upper structure is directly loaded;
A first anchor bolt that is inserted into the bolt hole of the base plate and the first bolt long hole of the slider, and a part of which is embedded in the lower structure to connect the base plate and the slider to the lower structure. When,
A friction resistance plate provided with a bolt hole, disposed in an unsupported region of the base plate that is not supported by the lower structure, and interposed between the base plate and the slider;
A second anchor bolt inserted into each corresponding bolt hole of the base plate and the frictional resistance plate and a second bolt long hole of the slider;
An axial force adjusting member attached to the second anchor bolt,
The movement of the slider toward the convex portion is restricted by the two convex portions,
An energy absorption type support in which a compression force of the friction resistance plate by the base plate and the slider is adjusted by the axial force adjusting member. The convex part is provided with a bolt hole;
2. The energy absorbing support according to claim 1, wherein a third anchor bolt is inserted into each bolt hole corresponding to the base plate and the convex portion, and the convex portion is fixed to the base plate. A bolt hole, further comprising a connecting material connecting the convex portion and the slider;
The third anchor bolt is inserted into each bolt hole corresponding to the base plate, the convex portion, and the connecting material, and the connecting material is fixed to the convex portion,
A separate friction resistance plate provided with a bolt hole at a position corresponding to the friction resistance plate between the slider and the connecting material,
The second anchor bolts are inserted through the corresponding bolt holes of the base plate, the friction resistance plate, the slider, the separate friction resistance plate, and the connecting material,
The compression force of the frictional resistance plate by the base plate and the slider and the compression force of the separate frictional resistance plate by the slider and the connecting material are adjusted by the axial force adjusting member. Energy-absorbing support as described in 1.   The energy absorption type support according to any one of claims 1 to 3, wherein the axial force adjusting member is made of any one of a disc spring, a leaf spring, a coil spring, and a hard rubber.

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