JP6414271B2 - Seismic isolation structure for pillars constituting the structure - Google Patents

Description

  The present invention relates to a seismic isolation structure for a column constituting a structure that is applied to a structure such as a three-dimensional warehouse, boiler steel frame, three-dimensional parking, and cargo handling equipment to reduce the shaking of the structure.

  The three-dimensional warehouse has a configuration in which a plurality of racks (shelves) are three-dimensionally assembled by providing a plurality of steel columns and a plurality of stages of steel beams. If a large-scale earthquake occurs, the three-dimensional warehouse may be damaged, and the load stored in the three-dimensional warehouse may fall and be damaged. In this way, it is considered to increase the safety against earthquakes by providing a seismic isolation structure for the pillars of a three-dimensional warehouse.

  As a base isolation structure of a three-dimensional warehouse, there is one having a base isolation structure made of laminated rubber between each lower end portion and a foundation of a plurality of columns constituting the three-dimensional warehouse (Patent Document 1). In addition, as a structure in which the pillars of the three-dimensional warehouse are cut at the upper and lower middle positions, the lower ends of the upper two pillars are connected by a horizontal first horizontal member, and the lower two parts corresponding to the upper two pillars By connecting the upper end of the column with a horizontal second horizontal member engageable with the first horizontal member, the second horizontal member and the second horizontal member are slid in the longitudinal direction via a low friction member. There is one in which the first horizontal member and the second horizontal member are connected by a viscoelastic body (Patent Document 2).

JP 2006-104883 A JP 2013-039989 A

  However, as in Patent Document 1, when a base-isolated structure with laminated rubber is provided at the lower end of each column of a three-dimensional warehouse provided with a large number of columns, it is necessary to add a foundation or the laminated rubber is relatively expensive. Therefore, there is a problem that the equipment cost of the three-dimensional warehouse increases. Also in Patent Document 2, since it is necessary to provide the first horizontal member and the second horizontal member, and further to provide a viscoelastic body for connecting the first horizontal member and the second horizontal member, the structure is There is a problem that the equipment cost of the three-dimensional warehouse increases due to the complexity. Furthermore, in Patent Document 2, the direction of base isolation is limited to the longitudinal direction in which the first horizontal member and the second horizontal member slide, and cannot be isolated from the direction perpendicular to the direction of the slide. There is a problem.

  The present invention has been made in view of the above-described conventional problems, and provides a seismic isolation structure that can effectively isolate a vibration acting on a column constituting a structure with a simple configuration. is there.

The base isolation structure of the structure is
A plurality of pillar members having connection portions at the ends and constituting pillars of the structure;
It has a connection part that connects to the end part of the pillar member at both ends, is connected between the two pillar members, is connected at the connection part, and is isolated from the pillar constituting the structure by tilting. Seismic isolation columns,
A restraining member that restrains the pillar member and the seismic isolation column while having a seismic isolation function;
A protruding portion that protrudes outward is formed only at the connection portion of either the column member or the seismic isolation column,
The other connecting portion of the column member and the seismic isolation column is a side surface of the column that fixes the restraint member,
The restraining member includes a base portion that extends vertically from a fixed position of the side surface of said post, and a pinching portion formed bent from the base,
The sandwiching portion sandwiches the protruding portion between the column member and the end portion of the column located on the other side of the base isolation column , and the sandwiching portion tilts the base isolation column with respect to the protruding portion. It is characterized by having a gap that enables it.

  It is preferable that the sandwiching portion arranged with a gap is inclined inward.

  According to the seismic isolation structure of the column that constitutes the structure of the present invention, it is possible to effectively isolate the vibration that acts on the column that constitutes the structure with a simple configuration.

(A) is a side view of a three-dimensional warehouse. (B) is a front view of a three-dimensional warehouse, and is an IB-IB arrow view of FIG. 1 (a). (A) is the figure which showed the normal time in the reference example of the pillar which comprises a structure. (B) is the figure which showed a mode that the seismic isolation pillar inclines and the pillar which comprises a structure is isolated. (A) is the top view which showed the example of arrangement | positioning of a restraint member, and is a IIIA-IIIA arrow directional view of Fig.2 (a). (B) is the top view which showed the other modification of the restraint member. (C) is the figure which showed the other modification of the restraint member. (A) is a side view which shows the side of the three-dimensional warehouse of normal times. (B) is the figure which showed a mode that the seismic isolation pillar inclines and the pillar which comprises a three-dimensional warehouse is isolated. (A) is a side view which shows the normal time in the pillar which comprises the structure further provided with the trigger mechanism. (B) is a side view which shows the time of the earthquake in the pillar which comprises the structure further provided with the trigger mechanism. (A) is the figure which showed the normal time in the 1st example of the pillar which comprises a structure. (B) is the figure which showed a mode that the seismic isolation pillar inclines and the pillar which comprises a structure is isolated. (A) shows a three-dimensional warehouse without a seismic isolation structure, (b) shows the case of a three-dimensional warehouse with a base isolation structure, (c) shows a three-dimensional warehouse with a base isolation structure in two stages. Shows the case.

  Hereinafter, an example of a mode for carrying out the present invention (hereinafter referred to as the present embodiment) will be described.

  A three-dimensional warehouse 100 will be described as an example of a structure to which the seismic isolation structure 5 of the pillar 1 constituting the structure of the present invention is applied with reference to FIG. FIG. 1A is a side view of the three-dimensional warehouse 100. FIG.1 (b) is a front view of the three-dimensional warehouse 100, and is a IB-IB arrow line view in Fig.1 (a).

  The three-dimensional warehouse (structure) 100 includes a plurality of racks 3 (shelf) three-dimensionally assembled by including a plurality of steel columns (columns constituting the structure) 1 and a plurality of steel beams 2. It has a configuration. The three-dimensional warehouse 100 is erected with a required height at a position sandwiching the stacker crane 4, has a length extending along the traveling direction of the stacker crane 4, and is orthogonal to the traveling direction of the stacker crane 4. Is a narrow width corresponding to the load to be stored. The plurality of pillars 1 constituting the three-dimensional warehouse 100 have high strength for supporting the weight of the load of the rack 3.

  The base isolation structure 5 of the reference example in the pillar 1 which comprises a structure is demonstrated referring FIG. 2 (a) and FIG. Fig.2 (a) is the figure which showed the normal time of the pillar 1 which comprises a structure. Fig.3 (a) is the top view which showed the example of arrangement | positioning of a restraint member, and is a IIIA-IIIA arrow line view of Fig.2 (a). (B) is the top view which showed the other example of arrangement | positioning of the restraint member 6. FIG. (C) is the figure which showed the other example of arrangement | positioning of the restraint member 6. FIG.

  The seismic isolation structure 5 of the reference example in the column 1 constituting the structure includes a plurality of column members 7, a seismic isolation column 8 disposed between the two column members 7, a column member 7 and the seismic isolation column 8. And a restraining member 6 that restrains the seismic isolation function. The column 1 constituting the structure has a plurality of column members 7 and a seismic isolation column 8 disposed between the two column members 7.

  The column member 7 is, for example, a square steel material and constitutes the column 1 of the structure. The pillar member 7 is formed with a flange 7a (protruding portion) having a rectangular planar shape protruding outward from one end portion or both end portions. The flange 7 a becomes a connection portion when connecting to the seismic isolation column 8 at the end of the column member 7.

  The seismic isolation column 8 is, for example, a square steel material. The seismic isolation column 8 is formed with rectangular flanges 8a and 8b projecting outward at both ends. Hereinafter, for convenience of explanation, the flange formed on the upper side in the drawing is called the upper flange 8a, and the flange formed on the lower side is called the lower flange 8b. The upper flange 8 a and the lower flange 8 b serve as connection portions when connecting to the column member 7 at both ends of the seismic isolation column 8.

  The upper flange 8 a and the lower flange 8 b have the same shape as the flange 7 a formed on the column member 7 and serve as a connection portion with the column member 7. When the seismic isolation column 8 is connected, the upper and lower flanges 8a and 8b are connected to the flange 7a of the column member 7 having the same shape, with their surfaces overlapped. The seismic isolation column 8 is disposed between the two column members 7. And the seismic isolation column 8 insulates the column 1 which comprises a structure by inclining with respect to the two column members 7. FIG.

  Here, in the seismic isolation column 8, the upper flange 8 a and the lower flange 8 b are overlapped with the flange 7 a of the column member 7. At this time, the flange surfaces of the overlapped flanges 8 a (8 b) and 7 a are brought into close contact with the seismic isolation column 8 and the weight of the column member 7. Thereby, the seismic isolation column 8 has a trigger function which does not tilt with a small load.

  In addition, although the column member 7 and the seismic isolation column 8 were demonstrated with the square steel material, it is not limited to this. It is only necessary to have a columnar shape and a flange at the end. For example, a round steel material with a flange, an H-type steel material, an I-type steel material, or a Z-type steel material may be used. Further, the flanges 7a and 8a (8b) of the column member 7 and the seismic isolation column 8 have been described in a rectangular shape, but the present invention is not limited to this. For example, a circular shape may be used.

  The restraining member 6 restrains the column member 7 and the seismic isolation column 8 while providing the seismic isolation function. In FIG. 2A, the restraining member 6 disposed on the front is omitted. The restraining member 6 is a groove steel having a U-shaped cross section formed by bending both sides of a band-shaped member, and has a base portion 6a having a flat surface and a pair of sandwiching portions 6b and 6c. The restraining member 6 is configured such that the surface of one sandwiched portion 6b is orthogonal to the plane of the base portion 6a.

  The other sandwiching portion 6c is inclined inward so as to approach one sandwiching portion 6b toward the tip. That is, the other sandwiching portion 6 c is inclined inward so as to narrow the groove width of the restraining member 6.

  Here, the inclination of the other sandwiching portion 6c is an inclination that makes surface contact with the flange 8a (8b) when the seismic isolation column 8 is inclined. The inclination of the other sandwiching portion 6c limits the inclination of the seismic isolation column 8 to a predetermined inclination.

  The restraining member 6 is arranged so as to sandwich the flange 7a of the column member 7 and the flange 8a (or the flange 8b) of the seismic isolation column 8 that are overlapped. Specifically, in the restraining member 6, one sandwiching portion 6 b is fixed to the flange 7 a of the column member 7, and the other sandwiching portion 6 c is positioned with a predetermined gap from the flanges 8 a and 8 b of the seismic isolation column 8. Arranged.

  The restraining member 6 is arranged so that the other sandwiching portion 6c is fixed to the flange 7a of the column member 7 and the one sandwiching portion 6b is positioned with a predetermined gap from the flanges 8a and 8b of the seismic isolation column 8. It may be an embodiment. That is, one of the pair of sandwiching portions 6b and 6c is fixed to either the flange 7a of the column member 7 or the flanges 8a and 8b of the seismic isolation column 8, and the flange 7a of the column member 7 and the flange of the seismic isolation column 8 You may arrange | position so that the other of a pair of clamping part 6b, 6c may be located in a gap between either one of 8a and 8b.

  For example, as shown in FIG. 3A, the restraining member 6 is a two-dimensional shape having a rectangular planar shape on each side of the flanges 7a and 8a (8b) where the column member 7 and the seismic isolation column 8 are overlapped. Eight are arranged. When the restraining member 6 is arranged in this manner, the seismic isolation column 8 restrains the horizontal movement with respect to the column member 7, and the seismic isolation column 8 tilts in the horizontal biaxial direction with respect to the column member 7. Is acceptable. Here, having a predetermined gap means having a gap that allows the seismic isolation column 8 to tilt with respect to the column member 7. The restraining member 6 allows the seismic isolation column 8 to slightly move in the horizontal direction with respect to the column member 7 because the seismic isolation column 8 is inclined.

  In this embodiment, the constraining member 6 is a groove-shaped steel having a rectangular planar shape and a U-shaped cross section, and flanges 7a and 8a (8b) in which the column member 7 and the seismic isolation column 8 are overlapped. However, the present invention is not limited to this, and the seismic isolation column 8 is restrained from moving horizontally with respect to the column member 7 so that the seismic isolation column 8 It suffices to allow the column member 7 to tilt to a predetermined position.

  For example, the restraining member 6 may be an integrated object, or the base portion 6a, one sandwiching portion 6b, and the other sandwiching portion 6c may be separate bodies. Further, the restraining member 6 is not limited to a U-shaped cross section, and may be, for example, a U shape. In addition, the restraining member 6 may form a pair of sandwiching portions 6b and 6c by forming a groove in a rectangular parallelepiped block.

  With reference to FIG.3 (b) and FIG.3 (c), the modification of the restraint member 6 and another modification are demonstrated. FIG. 3B is a plan view showing another modification of the restraining member. FIG.3 (c) is the figure which showed the other modification of the restraint member.

  A modification of the restraining member 6 is an L-shaped planar shape. Further, in the modified example of the restraining member 6, the cross-sectional shape is a U-shape. That is, a modification of the restraining member 6 is L-shaped channel steel. A total of four modified examples of the restraining member 6 are arranged at the four corners of the overlapping rectangular flange 7a and flange 8a.

  Another modification of the restraining member 6 has a U-shaped planar shape. Moreover, the other modified example of the restraint member 6 has a U-shaped cross section. That is, another modification of the restraining member 6 is a U-shaped groove steel. As another modification of the restraining member 6, a pair of rectangular flanges 7a and 8a are disposed. The above restraining member 6 restrains the seismic isolation column 8 from moving horizontally with respect to the column member 7, allows the seismic isolation column 8 to tilt in the horizontal biaxial direction with respect to the column member 7, and At least a pair of seismic isolation columns 8 and column members 7 are disposed so as not to come off.

  With reference to FIG.2 (b), a mode that the seismic isolation column 8 inclines and insulates is demonstrated. FIG. 2 (b) shows a state in which the seismic isolation column 8 is tilted to isolate the column 1 constituting the structure, and shows a case where an earthquake shakes in the right direction as indicated by an arrow in the figure. .

  As shown in FIG. 2 (b), it is assumed that a shake due to an earthquake occurs in the right direction as indicated by an arrow in the figure. In the pillar 1 constituting the structure, the lower pillar member 7 moves to the right, and the upper pillar member 7 tries to stay in place due to inertia.

  Then, the seismic isolation column 8 rotates with the upper flange 8a as a fulcrum at the corner formed by the flange 7a of the column member 7 and the base 6a of the upper right restraint member 6, and the lower flange 8b is the flange 7a of the column member 7. And a corner portion formed by the base portion 6a of the lower left restraining member 6 is rotated as a fulcrum. At this time, in the seismic isolation column 8, the upper flange 8 a is in surface contact with the other sandwiched portion 6 c of the upper left restraining member 6, and the lower flange 8 b is in surface contact with the other sandwiched portion 6 c of the lower right restraining member 6. Rotate until The seismic isolation column 8 is inclined with respect to the column member 7 as a whole.

  As described above, even if an earthquake occurs and the shaking acts on the pillar 1 constituting the structure as an external force, the pillar 1 constituting the structure is isolated from the earthquake by tilting the seismic isolation pillar 8 to constitute the structure. A large stress is no longer acting on the pillar 1 to be applied. Further, the inclination of the seismic isolation column 8 is restored by its own weight, but even when an external force exceeding it is applied, it is limited by the other sandwiching portion 6c of the restraining member 6, so that the column 1 constituting the structure is There is no collapse.

  With reference to FIG. 4, a state in which the seismic isolation column 8 is tilted and the column 1 constituting the three-dimensional warehouse 100 is isolated will be described. FIG. 4A is a side view showing a side surface of the three-dimensional warehouse 100 in a normal state. FIG. 4B is a diagram illustrating a state where the seismic isolation column 8 is tilted and the column 1 constituting the three-dimensional warehouse 100 is isolated. FIG. 4 is illustrated with the restraining member 6 omitted.

  As shown in FIG. 4, the three-dimensional warehouse 100 includes a plurality of seismic isolation columns 8 at the same height position. From the state of FIG. 4 (a), for example, suppose that it shook rightward due to an earthquake as shown by the arrow in FIG. 4 (b). In the three-dimensional warehouse 100, the lower rack 3b moves rightward with the seismic isolation column 8 interposed therebetween. At this time, the upper rack 3a tries to stay in place due to inertia.

  Then, the plurality of seismic isolation columns 8 are inclined in the same manner so that the upper side is left and the lower side is right. That is, the three-dimensional warehouse 100 allows the horizontal displacement of the lower rack 3b while keeping the upper rack 3a in place by the seismic isolation column 8 being inclined.

  As described above, even if an earthquake occurs and the shaking acts on the three-dimensional warehouse 100 as an external force, the column 1 constituting the structure is seismically isolated by tilting the seismic isolation column 8, and the column 1 constituting the structure Large stresses are not working.

  In addition, although the case where a shake due to an earthquake occurred in the right direction has been described, in the figure, when a shake due to an earthquake occurs in the left direction, the seismic isolation columns 8 are arranged such that the upper side is on the right and the lower side is on the left. Each of them tilts in the same way, and the pillars 1 constituting the structure are isolated.

  In addition, in the figure, when shaking occurs in the direction from the back to the front, the plurality of seismic isolation columns 8 are inclined in the same manner so that the upper side is the back and the lower side is the front, respectively, and the columns constituting the structure Isolate 1 Similarly, in the figure, when a vibration occurs in the direction from the front to the back, the plurality of seismic isolation columns 8 are inclined in the same manner so that the upper side is the front and the lower side is the back, thereby constituting the structure. Seismic isolation of pillar 1. As described above, according to the seismic isolation structure 5 of the column 1 constituting the structure of the present invention, the vibration acting on the column 1 constituting the structure with a simple configuration can be effectively isolated in the horizontal biaxial direction. it can. The seismic isolation column 8 has an upper flange 8 a and a lower flange 8 b overlapped with the flange 7 a of the column member 7. Thereby, the seismic isolation column 8 has a trigger function which does not tilt with a small load.

  Further, the restraining member 6 has the other sandwiching portion 6c inclined inward. As a result, the other sandwiched portion of the restraining member 6 is in contact with the flanges 8a and 8b of the seismic isolation column 8 when the seismic isolation column 8 is tilted. Therefore, the contact stress between the other sandwiched portion 6c of the restraining member 6 and the flanges 8a and 8b of the seismic isolation column 8 can be reduced, and the durability can be increased.

  The modification in the seismic isolation structure 5 of the pillar 1 which comprises the structure of this invention is demonstrated referring FIG. FIG. 5A is a side view showing a normal state in the pillar 1 constituting the structure further including the trigger mechanism 10. FIG. 5B is a side view showing an earthquake in the pillar 1 constituting the structure further including the trigger mechanism 10.

  This modified example has the same basic configuration as the above example except that it further includes a through hole 11 formed in the flanges 7a, 8a (8b) and the trigger mechanism 10. The same reference numerals are given to the same components, and the description that overlaps the description of the above embodiment is omitted.

  As shown in FIG. 5A, the seismic isolation structure 5 of the pillar 1 constituting the structure further includes a trigger mechanism 10. For example, eight trigger mechanisms 10 are arranged so as to correspond to the positions (see FIG. 3A) where the restraining members 6 are arranged. The trigger mechanism 10 includes a connecting bolt member 12, a disc spring 13, a nut 14, and a washer 15. FIG. 5A shows only one pair of trigger mechanisms 10 for convenience of explanation.

  A through hole 11 is formed in the flange 7a of the column member 7 and the upper flange 8a (lower flange 8b) of the seismic isolation column 8 so as to penetrate in the vertical direction while being overlapped with each other. For example, eight through holes 11 are formed so as to correspond to positions where the restraining members 6 are disposed. The connecting bolt material 12 is passed through the through-hole 11 from the lower side to the upper side, and a disc spring 13 as an elastic member is passed through the overlapping flanges 7 a and 8 a, and the nut 14 is passed through the washer 15. Connected.

  The trigger mechanism 10 acts to elastically press the surfaces of the flange 7a of the column member 7 and the upper flange 8a (lower flange 8b) of the seismic isolation column 8 against each other. Further, the disc spring 13 is not tilted by opening the flange 7a of the column member 7 and the upper flange 8a (lower flange 8b) of the seismic isolation column 8 due to the shaking caused by the occurrence of a small-scale earthquake. A certain degree of spring force is applied.

  As shown in FIG. 5B, when the seismic isolation column 8 is tilted, the flange 7a of the column member 7 and the flange 8a of the seismic isolation column 8 are opened, and the disc spring 13 of the trigger mechanism 10 is crushed. Then, the trigger mechanism 10 acts so as to close the flange 7 a of the column member 7 and the flange 8 a of the seismic isolation column 8 by the restoring force of the disc spring 13. Here, instead of the disc spring 13, a coil spring may be selected as the elastic member. However, the disc spring 13 is preferably used because it has a high deformation rigidity and a damping effect.

  As described above, according to the seismic isolation structure 5 of the column that constitutes the structure further including the trigger mechanism 10, the upper side of the flange 7 a of the column member 7 and the seismic isolation column 8 due to the shaking caused by the occurrence of a small-scale earthquake. The trigger function set so that the flange 8a (lower flange 8b) opens and the seismic isolation column 8 does not tilt can be provided. Moreover, since the trigger mechanism 10 uses the disc spring 13 as an elastic member, it can attenuate the load caused by shaking.

  Further, according to the column seismic isolation structure 5 constituting the structure further including the trigger mechanism 10, the flange 7a of the column member 7 and the upper flange 8a (lower flange 8b) of the seismic isolation column 8 are opened. In addition, the tilted seismic isolation column 8 can be actively restored to the original state.

  A first example of the pillar 1 constituting the structure will be described with reference to FIG. Fig.6 (a) is the figure which showed the normal time in the 1st example of the pillar which comprises a structure. The seismic isolation structure 5 in the first example of the column 1 constituting the structure includes a plurality of column members 27, a seismic isolation column 28 disposed between the two column members 27, a column member 27, and the seismic isolation column. And a restraining member 26 for restraining 28 while providing a seismic isolation function. The column 1 constituting the structure has a plurality of column members 27 and a seismic isolation column 28 disposed between the two column members 27.

  The column member 27 is, for example, a prismatic steel material and constitutes the column 1 of the structure. The column member 27 becomes a connection portion when the end portion 27 a is connected to the seismic isolation column 28. The end 27a is, for example, a flat surface.

  The seismic isolation column 28 is, for example, a square steel material having a smaller width and depth than the column member 27. The seismic isolation column 28 is formed with rectangular flanges 28a and 28b projecting outward at both ends. Hereinafter, for convenience of explanation, a flange formed on the upper side in the drawing is referred to as an upper flange 28a, and a flange formed on the lower side is referred to as a lower flange 28b.

  The upper flange 28 a and the lower flange 28 b serve as connection portions when connecting to the column member 27 at both ends of the seismic isolation column 28. The seismic isolation column 28 is disposed between the two column members 27. And the seismic isolation column 28 insulates the pillar 1 which comprises a structure by inclining with respect to the two column members 27. FIG.

  Here, in the seismic isolation column 28, the upper flange 28 a and the lower flange 28 b are in surface contact with the end portion 27 a which is a flat surface of the column member 27. At this time, the contact surface is brought into close contact with the seismic isolation column 28 and the weight of the column member 27. As a result, the seismic isolation column 28 has a trigger function that does not tilt with a small load.

  The restraining member 26 restrains the column member 27 and the seismic isolation column 28 while providing the seismic isolation function. In FIG. 6A, the restraining member 26 disposed on the front is omitted. The constraining member 26 has a cross-section formed by bending one side of a belt-like member in a letter (L) shape, and has a base portion 26a having a flat surface and a sandwiching portion 26c. The restraining member 26 has a base portion 26 a fixed to the side surface of the column member 27.

  When the restraining member 26 is fixed to the column member 27, the sandwiching portion 26 c becomes a portion that sandwiches the flange 28 a of the seismic isolation column 28 with the end portion 27 a of the column member 27. When the flange 27a (27b) of the column member 27 is disposed at this portion, the sandwiching portion 26c is positioned with a predetermined gap with respect to the flange 27a (27b). Here, having a predetermined gap means having a gap that allows the seismic isolation column 8 to tilt with respect to the column member 7.

  The restraining member 26 is disposed, for example, on four sides of the column member 27. When the restraining member 26 is arranged in this manner, the seismic isolation column 28 is restrained from moving horizontally with respect to the column member 27, and the seismic isolation column 28 is allowed to tilt with respect to the column member 27. The restraining member 26 allows the seismic isolation column 28 to slightly move in the horizontal direction with respect to the column member 27 because the seismic isolation column 28 is inclined.

  The sandwiching portion 26c of the restraining member 26 is inclined inward so as to approach one sandwiching portion 6b toward the tip. That is, the sandwiching portion 26c is inclined inward so as to narrow the gap. Here, the inclination of the sandwiching portion 26c is such that when the seismic isolation column 28 is inclined, it comes into surface contact with the flange 28a (28b). The inclination of the sandwiching portion 26c limits the inclination of the seismic isolation column 28 to a predetermined size.

With reference to FIG.6 (b), a mode that the seismic isolation column 28 inclines and insulates is demonstrated. FIG. 6B shows a state in which the seismic isolation column is tilted to isolate the column constituting the structure, and shows a case where an earthquake shakes in the right direction as indicated by an arrow in the figure.
As shown in FIG. 6B, it is assumed that a shake due to an earthquake occurs in the right direction as indicated by an arrow in the figure. In the pillar 1 constituting the structure, the lower pillar member 27 moves to the right, and the upper pillar member 27 tries to stay in place due to inertia.

  Then, the seismic isolation column 28 rotates with the upper flange 28 a as a fulcrum at the corner formed by the end portion 27 a of the column member 27 and the base portion 26 a of the upper right restraining member 26, and the lower flange 28 b is the end of the column member 27. The corner portion formed by the portion 27a and the base portion 26a of the lower left restraint member 26 is rotated as a fulcrum. At this time, the seismic isolation column 28 rotates until the upper flange 28a is in surface contact with the sandwiching portion 6c of the upper left restraining member 26 and the lower flange 8b is in surface contact with the sandwiching portion 26c of the lower right restraining member 26. . The seismic isolation column 28 is inclined with respect to the column member 27 as a whole.

  As described above, even if an earthquake occurs and the shaking acts on the pillar 1 constituting the structure as an external force, the pillar 1 constituting the structure is isolated from the earthquake by tilting the seismic isolation pillar 28 to constitute the structure. A large stress is no longer acting on the pillar 1 to be applied. Further, the inclination of the seismic isolation column 28 is restored by its own weight, but even when an external force exceeding it is applied, it is limited by the other sandwiching portion 26c of the restraining member 26. There is no collapse. Further, as compared with the previous embodiment, since the column member 27 does not have a flange, the outward protrusion can be suppressed, and space saving can be achieved.

  The other modification in the seismic isolation structure 5 of the pillar 1 which comprises the structure of this invention is demonstrated referring FIG. FIG. 7 (a) shows a three-dimensional warehouse 100 without the seismic isolation structure 5, FIG. 7 (b) shows the case of the three-dimensional warehouse 100 with the seismic isolation structure 5 in one stage, and FIG. 7 (c) shows the seismic isolation. The case of the three-dimensional warehouse 100 provided with the structure 5 in two stages is shown.

  Since this modification has the same basic configuration as that of the above embodiment except that a plurality of seismic isolation structures 5 are provided, the same components as those in the above embodiment are denoted by the same reference numerals, and the above embodiment is implemented. A description that overlaps with the description of the example is omitted. Further, FIG. 7 is schematically shown for easy understanding.

  As shown in FIG. 7A, in the three-dimensional warehouse 100 without the seismic isolation structure 5, when the foundation is shaken due to the earthquake, the vibration transmitted to the three-dimensional warehouse 100 becomes a shake with a larger acceleration toward the upper part.

  On the other hand, as shown in FIG. 7B, in the three-dimensional warehouse 100 including the one-stage seismic isolation structure 5, for example, the deformation amount δ can be absorbed by the seismic isolation function of the seismic isolation structure 5. Thereby, the transmission of the vibration to the upper part rather than the seismic isolation structure 5 can be reduced. Thereby, the shaking of the upper part of the three-dimensional warehouse 100 can be reduced.

  Further, as shown in FIG. 7 (c), when a two-stage seismic isolation structure 5 is provided on the pillar 1 constituting the structure, for example, a deformation amount 2δ is generated by the seismic isolation action of the two-stage seismic isolation structure 5. Therefore, the shaking of the three-dimensional warehouse 100 above the upper seismic isolation structure 5 can be further reduced. Therefore, as shown in FIG. 7 (c), when the seismic isolation structure 5 is provided in multiple stages on the pillar 1 constituting the structure, it is possible to absorb a shake that greatly deforms the structure during the seismic isolation.

  In addition, the seismic isolation structure for the pillars constituting the structure of the present invention is applied to pillars constituting the structures such as boiler steel frames, three-dimensional parking, cargo handling facilities, etc. in addition to the pillars of the three-dimensional warehouse 100 shown in the above-described embodiment. Various modifications can be made without departing from the scope of the present invention.

1 pillar 5 seismic isolation structure 26 restraint member 26a base 26c sandwiching part 27 pillar member 27a end 28 seismic isolation pillar 28a flange 28b flange 100 three-dimensional warehouse (structure)

Claims (2)

A plurality of pillar members having connection portions at the ends and constituting pillars of the structure;
It has a connection part that connects to the end part of the pillar member at both ends, is connected between the two pillar members, is connected at the connection part, and is isolated from the pillar constituting the structure by tilting. Seismic isolation columns,
A restraining member that restrains the pillar member and the seismic isolation column while having a seismic isolation function;
A protruding portion that protrudes outward is formed only at the connection portion of either the column member or the seismic isolation column,
The other connecting portion of the column member and the seismic isolation column is a side surface of the column that fixes the restraint member,
The restraining member includes a base portion that extends vertically from a fixed position of the side surface of said post, and a pinching portion formed bent from the base,
The sandwiching portion sandwiches the protruding portion between the column member and the end portion of the column located on the other side of the base isolation column , and the sandwiching portion tilts the base isolation column with respect to the protruding portion. Seismic isolation structure for pillars that make up structures that have gaps that enable them.   2. The seismic isolation structure for a column constituting the structure according to claim 1, wherein the sandwiching portions arranged with a gap are inclined inward.

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