JP6107955B2 - Seismic isolation structure and structure of pillars constituting the structure - Google Patents

Description

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

  A three-dimensional warehouse, which is an example of a structure, has a configuration in which a plurality of racks (shelves) are three-dimensionally assembled using a plurality of steel pillars and a plurality of steel beams. When a large-scale earthquake occurs, it is considered that the three-dimensional warehouse will be damaged, and the load stored in the rack of the three-dimensional warehouse may fall due to the earthquake and the load may be damaged. It is considered to increase the safety against earthquakes by installing a seismic isolation structure in a three-dimensional warehouse.

  As a seismic isolation structure of a three-dimensional warehouse, there is one having a seismic isolation structure made of laminated rubber between a plurality of pillars and a foundation constituting the three-dimensional warehouse (Patent Document 1). In addition, as the structure in which the columns of the three-dimensional warehouse are cut at the upper and lower halfway positions, the lower ends of the two upper columns are connected by a horizontal first horizontal member, and the two lower columns corresponding to the two upper columns are connected. The upper ends are connected by a horizontal second horizontal member engageable with the first horizontal member so that the first horizontal member and the second horizontal member can slide in the longitudinal direction, and further, the first horizontal member And a 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 between the lower end and the foundation of each supporting leg of a three-dimensional warehouse provided with a large number of supporting legs, the laminated rubber is expensive. Therefore, there is a problem that the equipment cost of the three-dimensional device 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 apparatus increases due to the complexity. Further, in Patent Document 2, the direction in which the support legs are isolated is limited to the longitudinal direction, which is the direction in which the first horizontal member and the second horizontal member slide, and the direction perpendicular to the direction of the slide is limited. Has the problem that it cannot be isolated.

  On the other hand, a three-dimensional warehouse, which is an automatic warehouse, has a length that extends along the traveling direction of the stacker crane, and a narrow width corresponding to the size of the load stored in the direction perpendicular to the traveling direction of the stacker crane. And has an elongated rectangular shape when seen in a plan view.

  Thus, the three-dimensional warehouse having a rectangular shape in plan view has a relatively high rigidity strength in the longitudinal direction, whereas the rigidity strength in the narrow width direction is relatively low. For this reason, in order to protect a three-dimensional warehouse from an earthquake, it is necessary to set the seismic isolation characteristics low in the narrow width direction and to flex-isolate flexibly. Furthermore, in a three-dimensional warehouse, the front surface of the rack facing the stacker crane is opened in order to store and unload luggage with respect to the rack by the stacker crane. Therefore, if a swing occurs in the narrow width direction of the three-dimensional warehouse, the load may fall from the rack. From this point as well, the seismic isolation is flexible in the narrow width direction of the three-dimensional warehouse. There is a need.

  This problem is not limited to three-dimensional warehouses, but because the reinforcements such as braces cannot be installed on the pillars of the structure by equipment or piping provided in the structure, the rigidity strength in the horizontal biaxial direction is high. In the case of different structures, it is desired that the seismic isolation characteristics can be changed according to the direction of the rigidity strength of the structure.

  The present invention has been made in view of the above-described conventional problems. The load applied to the column of the structure with a simple configuration can be isolated with different seismic isolation characteristics in the horizontal biaxial directions. It provides a seismic structure.

The seismic isolation structure for a column constituting the structure of the present invention has two column members constituting a column arranged so that the flat end surfaces face each other, and a flat contact surface facing the flat end surface at one end. And a seismic isolation column disposed between the two column members having the other end,
When the two column members are moved relative to each other in the horizontal direction, one end and the other end of the seismic isolation column are in relation to the two column members. A stopper member for preventing movement to the outside in the horizontal direction, and an elastic body that closely contacts the flat end surfaces of the two column members and the flat contact surfaces of one end and the other end of the seismic isolation column. A trigger mechanism in which the base isolation column starts to tilt around a fulcrum by the stopper member;
The elastic body is arranged such that a trigger load when the inclination of the base isolation column starts is different in the horizontal biaxial direction.

  In the seismic isolation structure of the column constituting the structure, different numbers of elastic bodies can be arranged on the side in the width direction and the side in the depth direction between the two column members and the seismic isolation column.

  In the seismic isolation structure of the column constituting the structure, the stopper member is preferably formed so as to protrude from one of the two column members and one end and the other end of the seismic isolation column and surround the other. .

  In the seismic isolation structure of the column constituting the structure, the fulcrum is formed by an edge of the flat end surface of the two members and an edge of the flat contact surface of the seismic isolation column. preferable.

  In the seismic isolation structure for a column constituting the structure, the elastic body is disposed inside a fulcrum formed by the flat end surfaces of the two members or the flat contact surfaces of the seismic isolation columns. It is preferable.

  In the seismic isolation structure of the column constituting the structure, it is preferable to provide a displacement limiting mechanism that limits the displacement of the seismic isolation column when the seismic isolation column is tilted.

  In the seismic isolation structure for the columns constituting the structure, a convex stopper member provided at the center of one of the end surfaces of the two column members and the contact surface of the seismic isolation column, and the convex stopper You may have the concave stopper member with which the other end center of the said end surface of the said two column members and the said contact surface of the said seismic isolation column was equipped so that it might fit with a member.

  The structure of the present invention is a structure in which different seismic isolation effects are required in the horizontal biaxial direction, and the seismic isolation structure is a trigger load in the horizontal biaxial direction generated by the elastic body provided in the seismic isolation structure. The lower side is arranged on the pillar of the structure so as to coincide with the direction in which the seismic isolation effect of the structure is desired to be enhanced.

  According to the present invention, when an earthquake occurs, the two column members move relative to each other in the horizontal direction so that the seismic isolation column is tilted with respect to the two column members. Since the trigger load in the horizontal biaxial direction when tilting in the direction can be set separately, the load acting on the column of the structure can be isolated with different seismic isolation characteristics with respect to the horizontal biaxial direction with a simple configuration An excellent effect can be achieved.

It is a front view which shows one Example of the seismic isolation structure of the pillar which comprises the structure of this invention. It is explanatory drawing which shows the state which the two pillar members of FIG. It is a top view of the seismic isolation column which shows the state which arrange | positions the elastic body of FIG. It is the front view which looked at FIG. 2a from the IIB-IIB direction. It is the side view which looked at FIG. 2a from the IIC-IIC direction. It is an effect | action figure for demonstrating the characteristic of the width direction (X-axis direction) which is a horizontal biaxial direction. It is an effect | action figure for demonstrating the characteristic of the depth direction (Y-axis direction) which is a horizontal biaxial direction. It is explanatory drawing which shows the example of attachment of an elastic body. It is explanatory drawing which shows the modification of FIG. It is explanatory drawing which shows another example of attachment of an elastic body. It is explanatory drawing which shows the modification of FIG. It is a perspective view which shows the example of a shape of a stopper member. It is a perspective view which shows another example of a shape of a stopper member. It is a perspective view which shows another example of a shape of a stopper member. It is a perspective view which shows another example of a shape of a stopper member. It is a front view which shows the other Example of the trigger mechanism which has in the seismic isolation structure of FIG. It is a front view which shows the Example which deform | transformed FIG. It is explanatory drawing which shows the example of a shape of the displacement limitation mechanism which restrict | limits the inclination of a seismic isolation column. It is explanatory drawing which shows another example of a shape of the displacement limitation mechanism which restrict | limits the inclination of a seismic isolation column. It is explanatory drawing which shows another example of a shape of the displacement limitation mechanism which restrict | limits the inclination of a seismic isolation column. It is a side view of the three-dimensional warehouse which is an example of the structure to which the seismic isolation structure of this invention is applied. It is the front view which looked at Drawing 7a from the FF direction.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  7a and 7b show a three-dimensional warehouse as an example of a structure to which the seismic isolation structure of the present invention is applied. The three-dimensional warehouse 100 (structure) has a configuration in which a plurality of racks 3 (shelves) are three-dimensionally assembled by including a plurality of steel pillars 1 and a plurality of steel beams 2. The three-dimensional warehouse 100 is erected with the stacker crane 4 interposed therebetween, and the three-dimensional warehouse 100 has a length V extending in the longitudinal direction along the traveling direction of the stacker crane 4 as shown in FIG. In the width direction orthogonal to the traveling direction of the stacker crane 4, as shown in FIG. 7B, the stacker crane 4 has a narrow width W corresponding to the size of the load to be stored. The plurality of pillars 1 constituting the three-dimensional warehouse 100 have high strength to support the weight of the load stored in the rack 3.

  The seismic isolation structure 5 of the present invention is provided on each of the plurality of pillars 1 constituting the three-dimensional warehouse 100 of FIGS. 7a and 7b. As shown in FIGS. 7 a and 7 b, the seismic isolation structure 5 is provided at the same height position of each pillar 1 provided in the three-dimensional warehouse 100. The seismic isolation structure 5 can be provided at an arbitrary height position of the pillar 1, or may be provided between the lower end of the pillar 1 and the foundation T.

  FIG. 1a shows an embodiment of a seismic isolation structure for a column constituting the structure of the present invention. The seismic isolation structure 5 provided on the pillar 1 constituting the three-dimensional warehouse 100 is, for example, a lower pillar member that is erected on the foundation T of FIGS. 7a and 7b and has a horizontal flat end face 6 formed at the upper end. 1A and two column members 1A and 1B having an upper column member 1B disposed on the extension of the column member 1A and having a horizontal flat end surface 7 formed at the lower end. Between the opposing flat end faces 6 and 7 of the two column members 1A and 1B, the seismic isolation column is provided with flat contact surfaces 8 and 9 that contact the end faces 6 and 7 at one end 10a and the other end 10b. 10 is arranged. The two column members 1A and 1B and the seismic isolation column 10 show a case where the horizontal cross section is made of a square steel material having a rectangular shape. The column members 1A and 1B and the seismic isolation column 10 are not limited to square steel materials, but may be H-type steel materials, I-type steel materials, Z-type steel materials, and cylindrical steel materials.

  A trigger mechanism 11 is provided between an end portion where the two column members 1 </ b> A and 1 </ b> B are opposed to one end 10 a and the other end 10 b of the seismic isolation column 10. The trigger mechanism 11 has a trigger function for keeping the end surfaces 6 and 7 and the contact surfaces 8 and 9 in close contact with each other by its own weight, and when the two column members 1A and 1B are relatively moved in the horizontal direction. And a stopper member 13 for preventing the seismic isolation column 10 from starting to be tilted by preventing the one end 10a and the other end 10b of the seismic isolation column 10 from moving outward in the horizontal direction with respect to the two column members 1A and 1B. . The trigger mechanism 11 shown in FIG. 1a protrudes from one of the two column members 1A, 1B and one end 10a and the other end 10b of the seismic isolation column 10, and the two column members 1A, 1B and one end 10a of the seismic isolation column 10. And a stopper member 13 that surrounds the other end 10b. Note that the trigger mechanism 11 shown in FIG. 1a is provided with a trigger adding device 18 using an elastic body 19 described later to increase the trigger load.

  In the embodiment shown in FIG. 1a, the one end 10a and the other end 10b of the seismic isolation column 10 are provided with contact flanges 17 projecting outward in the horizontal direction to form the contact surfaces 8 and 9. On the upper end of the lower column member 1A and the lower end of the upper column member 1B, a pressing flange 12 that forms the end faces 6 and 7 is provided so as to protrude outward in the horizontal direction. The pressing flange 12 is provided with a stopper member 13 that surrounds the outer periphery of the contact flange 17 provided on the seismic isolation column 10. The stopper member 13 of FIG. 1a extends from the pressing flange 12 to the inner side in the longitudinal direction of the seismic isolation column 10 so as to be separated from the seismic isolation column 10 and to have a required length. Between the inner surface and the outer surface of the seismic isolation column 10, a gap 14 is formed that opens inward in the longitudinal direction of the seismic isolation column 10. When the two column members 1A and 1B move relative to each other in the horizontal direction, the seismic isolation column 10 has its contact surfaces 8 and 9 abutting against the corner portion between the inner surface of the stopper member 13 and the end surfaces 6 and 7, respectively. The contact prevents the two pillar members 1A and 1B from moving outward in the horizontal direction. In other words, the inner surface of the stopper member 13 and the corner portions of the end surfaces 6 and 7 serve as fulcrums E so that the seismic isolation column 10 starts to tilt. Instead of the configuration of FIG. 1 a, a stopper member 13 may be provided on the contact flange 17, and the stopper member 13 may be formed so as to surround the outer periphery of the pressing flange 12.

  Here, since the cross sections of the two column members 1A and 1B are rectangular, the fulcrum E is formed by the horizontal and straight edges of the flat contact surfaces 8 and 9 of the seismic isolation column 10. .

  4a, 4b, 4c, and 4d show examples of the shape of the stopper member 13 constituting the trigger mechanism 11 provided on the two column members 1A and 1B. Since the trigger mechanism 11 provided between the two column members 1A, 1B and the seismic isolation column 10 has a vertically symmetrical shape, the lower column member in FIGS. 4a, 4b, 4c, and 4d. Only the stopper member 13 provided in 1A is shown.

  FIG. 4 a shows a case where a stopper member 13 protruding so as to surround the entire outer periphery of the one end 10 a of the seismic isolation column 10 is provided as in FIG. 1 a. FIG. 4 b shows a case where stopper members 13 ′ are provided only at the four corners of the pressing flange 12. FIG. 4 c shows a case where stopper members 13 ″ are provided only on the four sides of the pressing flange 12. FIG. 4 d shows a case where the stopper member 13 by the protrusion 15 that is a stud member is provided on the pressing flange 12 so as to surround the outer periphery of the one end 10 a of the seismic isolation column 10.

  5a and 5b show another embodiment of the trigger mechanism 11, which is convex on one of the end surfaces 6 and 7 of the two column members 1A and 1B and the contact surfaces 8 and 9 of the seismic isolation column 10. FIG. A case is shown in which a stopper member 20 is provided and a concave stopper member 21 is provided on the other side. The trigger mechanism 11 shown in FIG. 5a is provided with a convex stopper member 20 protruding vertically on the contact flange 17 of the seismic isolation column 10, and the convex stopper member 20 is formed by column members 1A and 1B made of square pipes. It has the structure fitted to the concave stopper member 21 to be formed. Further, the trigger mechanism 11 of FIG. 5b is provided with a convex stopper member 20 on the pressing flange 12 of the column members 1A and 1B, and the convex stopper member 20 is formed by a seismic isolation column 10 made of a square pipe. It has a configuration fitted to the concave stopper member 21.

  As described above, the flat end surfaces 6 and 7 of the two column members 1A and 1B, the flat contact surfaces 8 and 9 of the seismic isolation column 10 in close contact with the end surfaces 6 and 7, and the seismic isolation column 10 The trigger mechanism 11 is constituted by the stopper members 13, 20, 21 for forming the fulcrum E for starting the inclination.

  1a and 1b, the seismic isolation column 10 is displaced in the horizontal direction with respect to the two column members 1A and 1B between the seismic isolation column 10 and the two column members 1A and 1B. An alignment mechanism 16 is provided to prevent this. The alignment mechanism 16 of FIGS. 1a and 1b has a conical or pyramidal convex portion 16a protruding toward the seismic isolation column 10 at the center position of the end faces 6 and 7 of the two column members 1A and 1B. A conical or pyramidal concave portion 16b that fits into the convex portion 16a is formed on the contact surfaces 8 and 9 of the one end 10a and the other end 10b of the seismic isolation column 10. When the alignment mechanism 16 is provided, the tilted seismic isolation column 10 is restored even when a horizontal displacement occurs between the two column members 1A, 1B and the seismic isolation column 10. The two column members 1A and 1B and the seismic isolation column 10 are adjusted to a fixed position and restored.

  As shown in FIGS. 1a, 1b, 5a, and 5b, an elastic body is provided between the pressing flange 12 provided on the two column members 1A and 1B and the contact flange 17 provided on the seismic isolation column 10. A trigger adding device 18 is provided. The elastic body 19 contacts the pressing flange 12 so that the end surfaces 6 and 7 of the two column members 1A and 1B and the contact surfaces 8 and 9 of the one end 10a and the other end 10b of the seismic isolation column 10 are in close contact with each other with a required force. The outer peripheral part of the contact flange 17 is elastically connected. The elastic body 19 can be provided inside a fulcrum E formed by the end surfaces 6 and 7 and the contact surfaces 8 and 9. The trigger adding device 18 by the elastic body 19 can be adjusted so as to increase the trigger load when the seismic isolation column 10 starts tilting by the trigger mechanism 11 by selecting the number of the devices. As the elastic body 19, a restoring spring such as a disc spring or the like can be used.

  The elastic body 19 may be provided below the pressing flange 12 as shown in FIG. 3a, or may be provided above the contact flange 17 as shown in FIG. 3b. At this time, the tension rod 19a for applying a compressive force to the elastic body 19 made of a disc spring passes through the opening 19b provided in the pressing flange 12 and the contact flange 17, and the opening 19b is larger than the diameter of the tension rod 19a. It is loosely fitted by having a caliber. Further, as shown in FIG. 3c, the elastic body 19 may be arranged so as to elastically connect between the column members 1A and the mounting members 22 and 23 provided to protrude outside the seismic isolation column 10, or As shown in FIG. 3d, the elastic body 19 may be arranged so as to elastically connect between the column member 1A and the mounting members 22 ′ and 23 ′ provided so as to protrude inside the seismic isolation column 10. In this case as well, the elastic body 19 is provided on the inner side of the fulcrum E formed by the end surfaces 6 and 7 and the contact surfaces 8 and 9.

  2a, 2b, and 2c show an example of an arrangement method of the elastic body 19 arranged for the seismic isolation column 10. FIG. Four elastic bodies 19 are arranged at a mutual distance L1 on two sides 24x extending in the width direction (X-axis direction) of the contact surfaces 8 and 9 of the seismic isolation column 10 having a rectangular shape, and the depth direction (Y-axis) The case where the elastic body 19 is not provided in the two sides 24y extending in the direction) is shown.

  As shown in FIGS. 2a, 2b, and 2c, an arbitrary number of elastic bodies 19 provided on the side 24x in the width direction and the side 24y in the depth direction can be selected and installed. As a result, as shown in FIG. 1B, the trigger load when the outer periphery of the contact flange 17 contacts the stopper member 13 and the seismic isolation column 10 starts to tilt around the fulcrum E is set to the horizontal biaxial directions X, Any value can be set for Y. The elastic bodies 19 having the same elastic force can be used by changing the number of installations, or elastic bodies 19 having different elastic forces can be provided.

  6a, 6b, and 6c show a displacement limiting mechanism 25 that limits the displacement between the base isolation column 10 and the two column members 1A and 1B when the base isolation column 10 is tilted. Yes. In each figure, the installation of the elastic body 19 is omitted. The displacement limiting mechanism 25 in FIG. 6A shows a case where a locking piece 26 extending from the stopper member 13 of the column member 1A to the upper side of the seismic isolation column 10 with a gap G is provided. 6b shows a case where the pressing flange 12 of the column member 1A and the contact flange 17 of the seismic isolation column 10 are connected by a connecting bolt 27 having a length having a gap G. . Further, the displacement limiting mechanism 25 in FIG. 6c is provided with a locking member 28 that extends from the pressing flange 12 of the column member 1A to the upper side of the pressing flange 12 of the column member 1B with a length having a gap G. Is shown. The displacement limiting mechanism 25 may have a shape that also serves as the stopper member 13 as described above, or may be provided with an independent configuration regardless of the stopper member 13.

  The above embodiment operates as follows.

  FIG. 1a shows the column 1 in a stationary state, and the load applied to the upper column member 1B is a flat contact surface 9 of the seismic isolation column 10 in close contact with the flat end surface 7 of the column member 1B. And, it is transmitted to the lower column member 1A via the flat end surface 6 of the column member 1A in close contact with the flat contact surface 8 of the seismic isolation column 10, and the column 1 is held in a straight state.

  Further, in FIG. 1a, even when a relatively small acceleration S1 in the horizontal direction is generated in the column 1 due to the occurrence of an earthquake, the column 1 is held in a straight state. That is, the holding force due to the close contact between the flat end surfaces 6 and 7 of the pressing flange 12 of the column members 1A and 1B and the flat contact surfaces 8 and 9 of the contact flange 17 at one end 10a and the other end 10b of the seismic isolation column 10. Thus, the pillar 1 is held in a straight state. At this time, since the flat end surfaces 6 and 7 and the flat contact surfaces 8 and 9 are in close contact with each other by the load, the holding force by the close contact is large, and the trigger load necessary to tilt the seismic isolation column 10 is large.

  Furthermore, since the flat end surfaces 6 and 7 and the flat contact surfaces 8 and 9 are attached to each other by the attraction by the elastic body 19, a relatively small acceleration S1 swings in the horizontal direction due to a small-scale earthquake. Even if this occurs, the contact surfaces 8 and 9 of the seismic isolation column 10 and the end surfaces 6 and 7 of the column members 1A and 1B are kept in close contact with each other.

  On the other hand, when a large earthquake S2 occurs in the horizontal direction as shown in FIG. 1b due to the occurrence of a large-scale earthquake, the column members 1A and 1B are relatively moved in the horizontal direction. At this time, the one end 10a and the other end 10b of the seismic isolation column 10 cannot move while contacting the inner surface of the stopper member 13 and the corners of the end surfaces 6 and 7, and thus the end surfaces 6 and 7 and the contact surfaces 8 and When a load exceeding the trigger load range due to the close contact of 9 is applied to the seismic isolation column 10, the seismic isolation column 10 has left and right edges (sides) of the contact surfaces 8, 9 as shown in FIG. The tilt starts with fulcrum E as the fulcrum E. As the seismic isolation column 10 is tilted in this way, a large acceleration S2 in the horizontal and horizontal directions is isolated. Further, even when a large acceleration S2 shakes in the horizontal depth direction, the seismic isolation column 10 is similarly tilted in the depth direction so that the large acceleration S2 shake in the horizontal depth direction is isolated. At this time, if the width B in the left-right direction and the depth length in the depth direction of the contact surfaces 8 and 9 are formed large, the seismic isolation column 10 becomes difficult to tilt in the left-right direction and the depth direction, so a large trigger load should be set. Can do.

  In this way, by providing the seismic isolation structure 5 with a simple configuration in the column 1 of the three-dimensional warehouse 100 (structure) shown in FIGS. 7a and 7b, the load acting on the column 1 due to the earthquake can be effectively immunized. Can shake. That is, by providing the trigger mechanism 11 in which the trigger loads in the horizontal biaxial directions X and Y are arbitrarily set, the seismic isolation characteristics required for the horizontal biaxial directions X and Y of the three-dimensional warehouse 100 are effectively exhibited. It can be isolated.

  As shown in FIGS. 2a, 2b, and 2c, when the elastic body 19 is disposed on the side 24x in the width direction and the side 24y in the depth direction of the base isolation column 10, the base isolation column 10 is deformed in the horizontal direction. From the horizontal rigidity of the horizontal axis, the influence of seismic isolation characteristics on the horizontal biaxial directions X and Y due to the difference in the arrangement of the elastic body 19 will be considered.

  First, consider the contribution of horizontal rigidity to the seismic isolation column 10 by the elastic body 19 arranged as shown in FIGS. 2a, 2b, and 2c. When a load in the horizontal biaxial direction is applied to the seismic isolation column 10, the seismic isolation column 10 tends to incline around the lower end fulcrum E (see FIG. 1b). At this time, since the elastic body 19 works so as to resist the inclination of the seismic isolation column 10, the restoring force works so that the seismic isolation column 10 that is about to tilt returns to a vertical state.

Ｌ１：弾性体の相互距離
Ｌ２：弾性体の設置範囲
ｋｏ：ばね定数The height of the seismic isolation column 10 is h, the width of the seismic isolation column is B, the depth length of the seismic isolation column is B ′, and as shown in FIG. The horizontal stiffness khoX when tilted in the axial direction X parallel to 24x is as shown in Equation 1 because the lever spring is proportional to the square of the length.

L1: Mutual distance between elastic bodies L2: Installation range of elastic bodies ko: Spring constant

Similarly, as shown in FIG. 2D, the horizontal rigidity khoY when the upper end portion of the seismic isolation column 10 is inclined in the axial direction Y parallel to the side 24y in the depth direction is as shown in Equation 2. .

となり、図２ｄに示す軸方向Ｘに対して、図２ｅに示す軸方向Ｙによると、水平剛性では１．７３倍、固有周期では１．３倍の異なる免震特性をえることができる。勿論、上記は一例であり、弾性体１９の配置によって水平二軸方向Ｘ，Ｙに任意の異なる免震特性を与えることができる。Here, if L1 = B / 4 and L2 = B / 2,

Thus, according to the axial direction Y shown in FIG. 2e with respect to the axial direction X shown in FIG. 2d, different seismic isolation characteristics of 1.73 times in the horizontal rigidity and 1.3 times in the natural period can be obtained. Of course, the above is an example, and the arrangement of the elastic body 19 can give any different seismic isolation characteristics in the horizontal biaxial directions X and Y.

  Accordingly, in the three-dimensional warehouse 100 shown in FIGS. 7 a and 7 b, the direction in which the trigger load and the natural period of the seismic isolation structure 5 are lowered is aligned with the direction in which the three-dimensional warehouse 100 wants to enhance the seismic isolation effect. That is, the direction in which the side 24x in the width direction in which the elastic body 19 in FIG. 2a is installed extends is aligned with the axial direction X that is the direction of the narrow width W in the three-dimensional warehouse 100 in FIG. 7b. Thereby, the seismic isolation effect of the direction of the narrow width W of FIG. 7b can be heightened. On the other hand, the direction in which the side 24y in the depth direction in FIG. 2a in which the trigger load increases is aligned with the direction in which the seismic isolation structure 5 is not desired to be operated with a small load.

  As shown in FIGS. 2a, 2b, and 2c, different numbers of elastic bodies 19 are arranged on the side 24x in the width direction and the side 24y in the depth direction between the two column members 1A and 1B and the seismic isolation column 10. By doing so, the trigger load in the horizontal biaxial directions X and Y can be easily and arbitrarily set with a simple configuration.

  As shown in FIGS. 1a, 1b, 4a, 4b, 4c, and 4d, the stopper member 13 surrounds one end 10a and the other end 10b of the seismic isolation column 10 from the two column members 1A and 1B. Therefore, the fulcrum E when the seismic isolation column 10 tilts can be formed with a simple configuration.

  As shown in FIGS. 1a, 1b, and 2a, the fulcrum is supported by the edges of the flat end surfaces 6 and 7 of the two column members 1A and 1B or the edges of the flat contact surfaces 8 and 9 of the seismic isolation column 10. Since E is formed, a large load when the seismic isolation column 10 is inclined can be supported by the straight fulcrum E.

  As shown in FIGS. 1 a, 1 b, 5 a, and 5 b, the elastic body 19 includes the flat end surfaces 6 and 7 of the two column members 1 </ b> A and 1 </ b> B and the flat contact surface 8 of the seismic isolation column 10, Since the trigger mechanism 11 does not overhang outside the column 1, the small seismic isolation structure 5 is formed. Can be achieved.

  As shown in FIGS. 5a and 5b, when a convex stopper member 20 and a concave stopper member 21 which are fitted to each other are provided between the two column members 1A and 1B and the seismic isolation column 10, a simple structure is obtained. Therefore, the seismic isolation column 10 can be prevented from moving in the horizontal direction with respect to the two column members 1A and 1B.

  As shown in FIGS. 6a, 6b, and 6c, since the displacement limiting mechanism 25 that limits the displacement between the base isolation column 10 and the two column members 1A and 1B due to the inclination of the base isolation column 10 is provided, The tilt of the base isolation column 10 can be limited by the displacement limiting mechanism 25 having a simple configuration.

  In the three-dimensional warehouse 100 having different rigidity and strength in the horizontal biaxial direction, it is desired to enhance the seismic isolation effect of the three-dimensional warehouse 100 on the side where the trigger load in the horizontal biaxial direction of the seismic isolation structure 5 is provided by the elastic body 19. Since it arrange | positions to the pillar 1 according to a direction, it has the outstanding seismic isolation effect and can reduce the problem that a load falls from the rack of the three-dimensional warehouse 100 by an earthquake.

  In addition, the seismic isolation structure 5 can be applied to pillars of various structures such as boiler steel frames other than the three-dimensional warehouse 100, three-dimensional parking, and cargo handling facilities.

  In addition, this invention is not limited to the above-mentioned Example, Of course, a various change can be added in the range which does not deviate from the summary of this invention.

DESCRIPTION OF SYMBOLS 1 Column 1A Column member 1B Column member 5 Seismic isolation structure 6 End surface 7 End surface 8 Contact surface 9 Contact surface 10 Base isolation column 10a One end 10b The other end 11 Trigger mechanism 13 Stopper member 18 Trigger addition device 19 Elastic body 20 Convex shape Stopper member 21 Concave stopper member 24x Side in width direction 24y Side in depth direction 100 Three-dimensional warehouse (structure)

Claims (8)

Two pillar members constituting a pillar arranged so that the flat end faces face each other, and a flat abutting face facing the flat end face at one end and the other end, and between the two pillar members Seismic isolation columns,
When the two column members are moved relative to each other in the horizontal direction, one end and the other end of the seismic isolation column are in relation to the two column members. A stopper member for preventing movement to the outside in the horizontal direction, and an elastic body that closely contacts the flat end surfaces of the two column members and the flat contact surfaces of one end and the other end of the seismic isolation column. A trigger mechanism in which the base isolation column starts to tilt around a fulcrum by the stopper member;
The said seismic isolation structure of the said column which comprises the structure characterized by the said elastic body arrange | positioning so that the trigger load at the time of the inclination of the said seismic isolation column may differ in a horizontal biaxial direction.   2. The structure according to claim 1, wherein a different number of the elastic bodies are arranged on a side in a width direction and a side in a depth direction between the two column members and the base isolation column. Seismic isolation structure of the pillar.   2. The structure according to claim 1, wherein the stopper member is formed so as to protrude from one of the two column members and one end and the other end of the seismic isolation column and surround the other. Seismic isolation structure of the column.   2. The structure according to claim 1, wherein the fulcrum is formed by an edge of the flat end surface of two members and an edge of the flat contact surface of the seismic isolation column. Seismic isolation structure for the column.   The said elastic body is arrange | positioned inside the said fulcrum formed by the flat said end surface of two said members, or the said flat contact surface of the said seismic isolation column of Claim 1 characterized by the above-mentioned. Seismic isolation structure of the pillar that constitutes the structure.   The seismic isolation structure for the column constituting the structure according to claim 1, further comprising a displacement limiting mechanism that limits the displacement of the seismic isolation column when the seismic isolation column is tilted.   The convex stopper member provided at the center of one of the end surfaces of the two column members and the abutment surface of the seismic isolation column, and the two column members so as to be fitted to the convex stopper member 2. The seismic isolation structure of the column constituting the structure according to claim 1, further comprising a concave stopper member provided at the other center of the end surface of the seismic isolation column and the contact surface of the seismic isolation column.   In a structure requiring different seismic isolation effects in the horizontal biaxial directions, the seismic isolation structure according to any one of claims 1 to 7 is a horizontal biaxial generated by the elastic body provided in the seismic isolation structure. A structure in which a side having a low trigger load in a direction is arranged on the column of the structure so as to coincide with a direction in which the seismic isolation effect of the structure is desired to be enhanced.

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