JP4154472B2 - Deformation suppression device - Google Patents

Description

  The present invention relates to a deformation suppressing device for a seismic isolation device.

  Conventionally, this type of seismic isolation device supports a building because it is required to avoid resonance with the seismic wave and extend the period of the building when the building receives a horizontal force such as an earthquake. And a supporting part that moves horizontally, a restoring part that has a function of returning the original position even if the horizontal movement is stored at a constant displacement, and an attenuating part that has a function of attenuating the generated deformation. As a rolling bearing type, sliding bearing type, etc., as a restoring device, a mortar gradient type, a rubber type using an elastic body, a coil spring type, etc., as a damping device, those that make the bearing friction, oil damper, friction There are dampers.

  By the way, when applying to a seismic isolation device of a lightweight structure with a small load to be supported such as a detached house, it is necessary to reduce the restoring force of the seismic isolation. This is because the building that vibrates in response to a horizontal force such as an earthquake is intended to have a longer period and to avoid resonance with seismic waves. However, the seismic isolation device having a low restoring force requires some deformation suppression device (horizontal displacement suppression mechanism). When a large earthquake occurs and the horizontal displacement of the building becomes too large, not only the seismic isolation device but also the horizontal displacement of the superstructure of the building itself is too large, for example, it hits an adjacent building and destroys it Because there is. In addition, there is a problem that leads to a deterioration in comfort. That is, the seismic isolation layer is deformed under the influence of wind or the like, and the structure continuously shakes. This is because if the restoring force is low, the building will easily react to a relatively small horizontal force and the building will easily shake.

  For this reason, in Patent Document 1, the upper structure and the foundation are connected by a long body having a predetermined strength and length, and the relative displacement between the upper structure and the foundation is fixed within a certain range so that the support portion stops at a recoverable displacement. A method of suppressing the above is disclosed. However, the long material type deformation suppressing device is intended to suppress displacement exceeding the limit of restoration, and has no function of suppressing deformation when a relatively small horizontal force acts on the building. .

  On the other hand, it is difficult to connect the upper structure and the foundation with the long material. That is, it is necessary to devise how to bond the long material to the upper structure and the foundation. This is because the long material does not deviate from the upper structure or the foundation and exhibits predetermined performance and function. In addition, it is necessary to individually adjust the lengths of the long materials installed at a plurality of locations in consideration of construction errors such as unevenness of the foundation surface. The maximum relative horizontal displacement between the steel foundation beam and the foundation surface in the limit extension state of the long members at the maximum deformation of the building (the position of the upper structure and the lower foundation relative to the position where the long members are connected) This is to prevent the horizontal force from concentrating on the long material installation position at a specific location and to prevent harmful damage to the building by making the displacement) substantially the same.

JP 2000-230342 A

  It is an object of the present invention to provide a deformation suppressing device for a seismic isolation device that can suppress deterioration of habitability due to the occurrence of shaking in the upper structure under the influence of wind or the like even during normal times.

  A deformation suppression device for a seismic isolation device according to the present invention is a deformation suppression device in a seismic isolation device installed in a seismic isolation layer of a building, and a pair of blocks installed on a base and a foundation surface of the building, It consists of a long member that loosely connects blocks and a fixture that connects the pair of blocks so as to maintain a predetermined distance. When the horizontal force during an earthquake is less than or equal to a predetermined value, the fixture is The relative displacement between the foundation and the foundation surface is regulated, and when the horizontal force exceeds a predetermined value, the fixture breaks to release the restriction of the relative displacement, and the long material is the long material. It is the deformation | transformation suppression apparatus of the seismic isolation apparatus characterized by the above-mentioned.

  If the deformation suppressing device of the present invention is used, normally, the deterioration of the habitability is suppressed by the presence of the fixture constituting the deformation suppressing device, that is, the upper structure is continuously affected by the influence of wind or the like. In addition to suppressing the occurrence of micro-vibration, if the horizontal force exceeds a specified value due to the occurrence of an earthquake, the deformation suppression function of the fixture is released, and the bearing is not restrained by the deformation suppression device. When the support part moves or deforms beyond a certain range while freely displacing within a certain range, further deformation can be prevented by the long material reaching the extension limit.

  Moreover, the deformation | transformation suppression apparatus of this invention is provided with the block, and is previously connected with the fixing tool so that the said blocks may hold | maintain predetermined spacing at the manufacture stage. In addition, the length of the long material is adjusted so that all the deformation suppressing devices are substantially equal to the maximum horizontal displacement of the building. Therefore, it is not necessary to adjust the position of the blocks, the distance between the blocks, the length of the long material, etc., when attaching to the foundation beam surface and the foundation surface. That is, for example, if the deformation suppressing device is fixed in advance to a plurality of locations of the steel foundation beam, and then the concrete is placed in correspondence with the block on the foundation surface side, the foundation beam surface and the foundation surface are fixed to a predetermined position. It is possible to easily connect the foundation and the foundation integrally while maintaining the interval. Furthermore, even at the maximum deformation, the long material at a specific location and the long material installation site are not damaged.

  Further, the fixture of the present invention can be easily replaced after being broken by attaching it from the outside. The setting of the breaking load is determined by the building scale, building shape, and site conditions, but the deformation suppressing device of the present invention can be easily adapted to individual design depending on the setting of the shape, strength, etc. of the fixture.

  In addition, by providing bolt insertion holes at the four corners of the block, for example, superposed on the bolt insertion holes on the foundation beam provided in advance at an equal pitch (for example, about 300 mm to 500 mm) to ensure the strength, , You can tie up with the basics. Especially in industrialized houses, etc., where the joint positions of members are defined in advance by a module (for example, a set of four bolt holes in the flange described in JP-A-08-311990 is based on the module dimension P). Further, it is advantageous in terms of construction to use a beam member or the like having an H-shaped cross section drilled at a constant pitch P as a base beam.

  In addition, by making the long material to be inserted into the box as a box, the central cavity is loosely inserted over the length of the side of the box, making it easy to adjust the mounting during construction, and long in maintenance management after construction. Deterioration of the scale material is prevented, and cracks do not occur without applying a load to a part of the long material during horizontal behavior during an earthquake, so that it is possible to exhibit the required performance and functions.

  The best mode of the present invention will be specifically described below.

  Embodiments of the present invention will be described below with reference to the drawings.

(Structure of deformation control device, suitable material, shape)
FIG. 1 is an elevation view (a) showing a deformation suppressing device for a seismic isolation device according to a first embodiment of the present invention,
They are (b), a perspective view (c), and component drawing (d), (e) of a fixture.
A deformation suppressing device 1 for a seismic isolation device according to a first embodiment of the present invention includes a pair of blocks (hereinafter, block 2 and block 3), a long material (hereinafter, wire rope 4), and a pair of fixtures 5 (hereinafter, plates). ).

  The blocks 2 and 3 have four bolt insertion holes 2c and 3c at the four corners of the box 2b and 3b having a substantially square shape in plan view, and 2 at the center of the boxes 2b and 3b sandwiched between the bolt insertion holes. Cavities 2d and 3d are provided at some locations. The four bolt insertion holes 2c and 3c provided at the four corners of the blocks 2 and 3 are arranged so as to overlap the insertion holes previously drilled in the steel base beam at an equal pitch (for example, about 300 mm to 500 mm), This is because a predetermined anchor bolt can be inserted and fixed on the foundation concrete surface of the foundation so that the predetermined bolt and nut can be inserted and fixed. The reason why the two hollow portions 2d and 3d are provided in the central portions of the boxes 2b and 3b is to allow the wire rope 4 to be inserted loosely over the length of the sides of the box. Here, in the boxes 2b and 3b of the blocks 2 and 3, two plate materials 2a and 3a each having a substantially rectangular shape in plan view are further fixed to each of the two, and in the hollow portions 2d and 3d at the center of the blocks 2 and 3, It is comprised so that the wire rope 4 can be penetrated. That is, when the blocks 2 and 3 are bolted by contact with the flange surface (not shown) of the steel foundation beam (cross-section H-shaped steel, etc.), the notches are formed on the side surfaces of the blocks 2 and 3 so as not to prevent the wire rope 4 from being inserted. Is formed. Accordingly, the fixing positions of the plate members 2a and 3a correspond to the bolt holes of the steel foundation beam, and the thickness of the plate member is larger than the diameter of the wire rope 4. A suitable material for the blocks 2 and 3 is a steel plate, but other than this, hard plastics such as metal, ceramics, and FRP may be used.

  The wire rope 4 is connected in a ring shape by adjusting a predetermined length after caulking one long material through the two hollow portions at the center of the pair of upper and lower blocks 2, 3. The length of the wire rope 4 is set according to the maximum allowable value of the horizontal movement distance. In addition, the material of the wire rope 4 should just be long and intensity | strength is ensured, Steel materials, a plastic material, a synthetic fiber material natural raw material, etc. are mentioned.

The plate 5 in FIG. 1 (d) is a thin plate having a substantially rectangular shape in plan view, and has bolt holes 5a at upper and lower ends so that it can be fixed to the side surfaces of the upper and lower blocks 2 and 3 with bolts. This is to maintain the positional relationship between the blocks 2 and 3 in the horizontal direction so that slight vibration does not occur when a horizontal force of a predetermined value or less is applied to the building. At the same time, since the positional relationship in the vertical direction is also maintained, it is advantageous in that the adjustment work of the distance between the blocks and the adjustment work of the length of the wire rope can be omitted when the deformation suppressing device is installed.
Furthermore, a rupture portion (neck) 5b is provided at the center of the plate 5 so that the portion is broken when a horizontal force exceeding a predetermined value is applied to the deformation suppressing device. This break breaks the fixed connection between the blocks 2 and 3 and allows the steel foundation and the foundation surface to move freely within the allowable range of the length of the wire rope 4. This is so that it can be demonstrated. Here, the plate 5 breaks early because the plate 5 is weaker than the strength of the wire rope 4 itself, the joint between the blocks 2 and 3 and the base beam, and the joint between the blocks 2 and 3 and the foundation. This is because the breakage is manifested at an early stage, and the constriction is introduced because it is easy to manage the position of the fracture portion 5b. Thus, if only the plate after the break is replaced, it can be reused.
The plate 7 shown in FIG. 1 (e) replaces the plate 5 and is provided with a portion that is perforated at equal intervals in the center of the plate as a broken portion 7b. The part breaks when a horizontal force exceeding a predetermined value is applied.

FIG. 2 is an elevation view (a) showing a deformation suppressing device for a seismic isolation device according to a second embodiment of the present invention,
They are (b), a perspective view (c), and component drawing (d), (e) of a fixture. This is another embodiment for maintaining the positional relationship between the pair of upper and lower blocks 12 and 13. By holding the blocks 12 and 13 and the plates 15 and 17 directly between the bolts and nuts 16 and inserting the protrusions 15c and 17c on both ends into the block, the vertical positional relationship between the blocks 12 and 13 is maintained. , 13 and the adjustment work of the length of the wire rope 14 are omitted.

  In addition, although the steel plate is the most suitable material for the plates 5, 7, 15, and 17 in the first and second embodiments, hard plastics such as metal, ceramics, and FRP may be used. .

(Seismic isolation layer structure, joint structure of each part)
FIG. 3 is a cross-sectional view (a) showing an apparatus of a base isolation part and a deformation suppression part of a base isolation in a base isolation layer using a deformation suppression apparatus for a base isolation apparatus according to a first embodiment of the present invention, It is AA arrow directional view (b) and sectional drawing (c) at the time of the maximum deformation | transformation of a building (when the relative displacement of a superstructure and a foundation becomes the maximum). Here, the seismic isolation layer refers to a portion between layers having a cross section of approximately GL to Z0.

  3A and 3B, the structure of the support portion is such that the slide receiving plate 106 is fixed to the gantry concrete 102 provided on the base bottom plate 101 with the nut 106a via the anchor bolt 106b. On the other hand, a support device 107 is installed on the steel frame beam 103, and a slide support 107b is provided via a support column 107a. The support 107 b is placed on the substantially central portion of the slide receiving plate surface 106 and supports the steel foundation beam 103 on which the upper structure 104 is placed. In addition, the decorative board 103a is attached through the connecting member 103b attached to the web of the steel frame base beam (cross-section H-shaped steel) over the entire outer periphery (Y0: module core) of the building.

  The gantry concrete 105 has a 915 mm square and a height of 168 mm in plan view, and is provided on the basis of the top end surface of the base bottom plate 101. The sliding plate 106 is 3 mm thick and is laid on the entire top end surface of the gantry concrete 105. The surface has a certain amount of frictional resistance. This is to prevent the sliding support 107b from being detached from the top end surface of the gantry concrete 105 by horizontal movement. The height of the column 107a is 150 mm, the thickness of the sliding bearing 107b is approximately 32 mm, and the steel base beam 103 is 300 mm. The top edge of the foundation rising portion 102 is 300 mm from the ground surface (GL), and the distance from the ground surface (GL) to the top edge (Z0) of the steel foundation beam 103 is 600 mm.

The structure of the deformation suppressing portion is that a base concrete 108 having a height of 100 mm provided on the bottom slab 101 of the foundation is provided, and the deformation suppressing portion according to the present invention is provided at the center of the lower plate 109 embedded and driven in the base concrete 108. The device (see FIG. 1) 110 is fixed.
That is, in the deformation suppressing device 110, the lower block is bolted (109a, 109b) to the gantry concrete 108 via the lower plate 109, and the upper block is bolted (109c, 109d) to the steel frame beam 103. This is to prevent the base bottom plate 101 and the steel base beam 103 from coming off even during horizontal behavior.

The gantry concrete 108 is 450 mm square in plan view and 100 mm in height, and is provided on the basis of the top end surface of the base bottom plate 101. The lower plate 109 is 250 mm square in plan view,
It has a thickness of 16mm and is fixed integrally by placing concrete on the platform. In the deformation suppressing device 110 (height 250 mm), the distance between the steel foundation beam 103 and the gantry concrete is 250 mm, and is accommodated therebetween.

  FIG. 3C shows an example of a state in which the building is maximally deformed by breaking the fixture of the deformation suppressing device when a horizontal force exceeding a predetermined value of the building is applied. Since the fixture is broken, the upper structure moves horizontally to the left with reference to the installation position of the lower foundation deformation suppressing device. Here, the limit of deformation of the building is adjusted by the length of the long material (wire rope) of the deformation suppressing device 110, and in this embodiment, the movement range of the support device 107 of the support portion is within the region of the slip plate 106. It is set to fit.

  FIG. 4 is a perspective view of the restoration device of the restoration unit used in the embodiment of FIG. 3 according to the present invention. The restoring device 21 is provided with an upper plate 23 for joining with a steel foundation beam on the upper part of a cylindrical restoring elastic body 22, and a lower plate 24 to be placed on or embedded in the gantry concrete at the lower part. It is. As the restoring elastic body, various vulcanized rubbers, unvulcanized rubbers, urethane rubbers, thermoplastic rubbers and the like may be used. The shape of the restoring elastic body is not limited to a circle but may be a square or a polygon. In the restoring device 21, the lower plate 24 is bolted to the pedestal concrete, and the upper plate is bolted to the steel base beam, so that it does not come off from the bottom plate of the foundation and the steel base beam even during horizontal behavior.

  The structure of the damping part used in the first embodiment according to the present invention is based on frictional damping between the support part 107 and the sliding plate 106 without providing a separate device. Although not specifically shown, a known oil damper mechanism may be installed.

(Effects of deformation suppression device)
The deformation suppressing device of FIG. 1 in the seismic isolation device of FIG. 3 configured as described above is such that the pair of plates 5 and 7 that connect and fix the pair of upper and lower blocks 2 and 3 have a horizontal force at the time of an earthquake or less In this case, the displacement of the horizontal movement is restricted, and when the horizontal force exceeds a predetermined value, the displacement of the sliding bearing of the bearing portion is allowed. That is, the plate 5 is formed with rupture portions 5b and 7b (necking and drilling in the central portion) and is connected to the upper and lower blocks 2 and 3, so that the horizontal force during an earthquake exceeds a predetermined value. First, the shear stress concentrates on the fracture portions 5b and 7b, and the fracture occurs. The same function is exhibited even when the deformation suppressing device of FIG. 2 is used.

(Effect of building on horizontal force)
Further, the deformation suppressing device of FIG. 1 in the building having the seismic isolation layer of FIG. 3 configured as described above is the normal state where the deformation suppressing device including the plates 5 and 7 is not generating an earthquake, or the occurrence of an earthquake. Even if the horizontal force input to the foundation side is less than the predetermined value, the plate 5 and 7 will prevent the upper structure from shaking due to the influence of wind, etc. When the horizontal force input to the foundation side with the occurrence of an earthquake exceeds a predetermined value, the fracture portions 5b and 7b of the plates 5 and 7 (necking of the center portion, drilling processing) When the rupture breaks, it will exhibit the specified seismic isolation performance. That is, the displacement is allowed within a certain range set by the wire rope 4, the support part moves horizontally, the restoring part takes the restoring function, and the damping part absorbs the vibration energy by reducing the displacement. . The same function is exhibited even when the deformation suppressing device of FIG. 2 is used.

(Installation procedure of seismic isolation layer and installation procedure of the device of the present invention)
FIG. 5 is a perspective view showing a construction procedure of a support portion, a deformation suppression portion, and a restoration portion of the base isolation using the deformation suppression device of the base isolation device according to the embodiment of FIG. For convenience, this is one of the corners of the building.

In FIG. 5- (1), first, the foundation of the entire building is constructed. A bottom plate 201 is placed in accordance with the construction area of the building. As a solid foundation, a foundation rising 202 is provided on the outer periphery. At this time, the base concrete 205 for receiving the support part is simultaneously placed, and the parts for embedding and fixing the restoration unit 211 and the deformation restraining unit 210 (see FIG. 5- (3)) are cast concrete. It is preferable that the openings 201a and 201b are provided in the base bottom plate 201 in advance. This is to ensure positional accuracy.
Next, the support part of the whole building is constructed. In each support portion, a sliding plate 206 is fixed to an anchor bolt 206b provided on the mount concrete 205 with a nut 206a. This is to form the sliding surface of the sliding bearing.

In FIG. 5- (2), after placing and fixing the slide plate 206 of the gantry concrete, the support device 207 is disposed at a predetermined position. This is because the main steel foundation beam 203 is first supported by the support device 207 in order to form the foundation of the entire building.
Next, the steel base beam 203 is placed on the support device 207 arranged at the important point of the entire building, and the steel frame is joined to the support 207 b of the support device 207 in the vertical direction (bolt connection). The base beams 203 are connected in the horizontal direction to form a main base of the entire building. Furthermore, the surrounding steel foundation beam 203a is connected in the horizontal direction. In this way, the above work is performed in all the support portions of the building, and the foundation of the entire building is formed.

  In FIG. 5- (3), each apparatus 210, 211 of a deformation | transformation suppression part and a decompression | restoration part is attached. A deformation | transformation suppression part bolts the upper block of the deformation | transformation suppression apparatus 210 of this invention to the steel foundation beam 203 in a predetermined position first, and makes it the state where it hung down from the steel foundation beam 203. FIG. Next, the lower block and the lower plate of the deformation suppressing device 210 are inserted into the bolt hole of the block from the lower plate side and joined with a nut from the block side (not shown). Subsequently, anchor bolts are inserted into the holes at the four corners of the lower plate, dropped into the opening 201a of the base bottom plate previously provided at a predetermined position, and a mold having a predetermined height is provided around the opening, and the lower plate The base concrete 208 is placed using the top end surface of the base as a reference plane.

As a result, as shown in FIG. 5- (4), the base bottom plate 201, the base concrete 208, the deformation suppressing device 210 of the present invention, and the steel foundation beam 203 can be integrally connected and fixed.
In the present embodiment, an example in which the lower block is joined to the lower plate of the deformation suppressing device at the construction site has been described. However, if an assembly assembled in advance at a factory or the like is used, the on-site construction can be further omitted.

  In installing the restoration device 211 in the restoration unit, the method for fixing to the steel base 203 and the method for fixing to the bottom plate 201 of the foundation can be performed in substantially the same manner as the deformation suppressing device 210.

  In particular, it can be suitably used for a lightweight structure such as a detached house.

FIG. 1 is an elevation view (a), (b), a perspective view (c), and a component diagram (d) of a fixture, showing a deformation suppressing device for a seismic isolation device according to a first embodiment of the present invention. e). 2 is an elevation view (a), (b), a perspective view (c), and a component diagram (d) of a fixture, showing a deformation suppressing device for a seismic isolation device according to a second embodiment of the present invention. e). FIG. 3 shows an apparatus of a base isolation part and a deformation suppression part in a base isolation layer in a base isolation layer using the deformation suppression apparatus of the base isolation apparatus according to the first embodiment of the present invention, and (a) is a sectional view. (B) is an AA arrow line view. It is sectional drawing at the time of the maximum deformation | transformation of a building (when the relative displacement of a superstructure and a foundation becomes the maximum). 4 is a perspective view of a restoring device used in the seismic isolation device according to the embodiment of FIG. 3 of the present invention. FIG. 5 shows a construction procedure of a support part, a deformation suppressing part, and a restoring part in the base isolation using the deformation suppressing apparatus of the base isolation apparatus according to the first embodiment of the present invention. FIG. 3 is a perspective view showing a construction state of the foundation of the entire building. It is a perspective view which shows the installation state of a support part. It is a perspective view which shows the attachment state of a deformation | transformation suppression part and a decompression | restoration part. It is a perspective view which shows a construction completion state.

Explanation of symbols

1, 11, 110, 210 Deformation suppression device 2, 12 Block (upper part)
3, 13 blocks (bottom)
2a, 3a block plate material 2b, 3b block box 2c, 3c block bolt insertion hole 2d, 3d block center cavity 4, 14 long material (wire rope)
5, 7, 15, 17 Fixing (plate)
5a, 7a, 15a, 17a Fixing device bolt holes 5b, 15b Fixing device breakage (necking)
7b, 17b Fracture part of fixture (drilling)
15c, 17c Protrusion 6, 16b Bolt, 16a Nut 21, 211 Restoring device 22 Cylindrical restoring elastic body 23 Upper plate 24 Lower plate 101, 201 Foundation bottom plate concrete, 201a, 201b Foundation bottom plate openings 102, 202 Foundation Rising concrete,
103, 203 Steel base beam, 103a decorative plate, 103b Steel base 104 around connecting member 203a Upper structure 105, 205 Mounting concrete 106, 206 Slide receiving plate, 106a Nut, 106b Anchor bolt 107, 207 Bearing device, 107a, 207a Props,
107b, 207b Sliding support, 107c nut, 107d bolt 108, 208, 212 Lower concrete 109 Lower plate, 109a nut, 109b Anchor bolt 109c Nut, 109d bolt

Claims (1)

A deformation suppressing device for a seismic isolation device installed in a seismic isolation layer of a building,
It consists of a pair of blocks installed on the foundation and the foundation surface of the building, a long material that loosely connects the pair of blocks, and a fixture that connects the pair of blocks so as to maintain a predetermined interval, When the horizontal force at the time of an earthquake is less than a predetermined value, the fixture regulates the relative displacement between the foundation and the foundation surface, and when the horizontal force exceeds a predetermined value, the fixture breaks. An apparatus for suppressing deformation of a seismic isolation device, wherein the restriction of the relative displacement is released, and the long material is configured to prevent relative displacement exceeding an extension limit of the long material.

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