JP2015224760A - Seismic isolator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To change the characteristics of a seismic isolator supporting the building according to the characteristics of disturbance acting on the building and the increase or decrease of the weight of the building.SOLUTION: A seismic isolator includes a seismic isolation supporter including a laminated rubber supporting a structure, and rigidity change means which changes the rigidity characteristics of the seismic isolation supporter according to the characteristics of disturbance acting on the structure, or the increase or decrease of the weight of the building.

Description

  The present invention relates to a seismic isolation device provided in a seismic isolation building.

  In order to cope with a large earthquake that may occur in the near future, seismic isolation buildings that support the seismic isolation of structures by seismic isolation devices have become widespread. For example, Patent Literature 1 discloses a base-isolated building in which a building body is supported by base isolation using a plurality of laminated rubbers installed on a building foundation.

  In addition, seismic isolation buildings are required to have higher safety and comfort, and the characteristics of external forces temporarily received by the seismic isolation buildings due to earthquakes, typhoons, etc., extension, reduction, reconstruction, It is desired that the characteristics of the seismic isolation device can be changed in accordance with the increase or decrease of the building weight due to changes in usage.

JP 2009-121043 A

  This invention considers the fact which concerns, and makes it a subject to change the characteristic of the seismic isolation apparatus which supports this building according to the characteristic of the disturbance which acts on a building, or the weight increase / decrease of a building.

  The first aspect of the invention is to change the rigidity characteristics of the seismic isolation bearing according to the seismic isolation bearing including the laminated rubber that supports the structure and the characteristics of the disturbance acting on the structure or the weight increase / decrease of the structure. A seismic isolation device.

  In the invention of the first aspect, the seismic isolation device that supports the structure according to the characteristics of the disturbance acting on the structure and the weight increase / decrease of the structure by changing the rigidity characteristics of the seismic isolation bearing by the rigidity changing means. The characteristics of can be changed.

  The invention of a second aspect is the seismic isolation device of the first aspect, wherein the seismic isolation bearing is an elastic sliding bearing configured by providing a sliding bearing on an upper surface or a lower surface of the laminated rubber, and the rigidity changing means is The connecting member is disposed around the laminated rubber and connects the upper flange and the lower flange of the laminated rubber to restrain the relative movement in the horizontal direction of the upper flange and the lower flange.

  In the second aspect of the invention, by connecting the upper flange and the lower flange of the laminated rubber with the connecting member, the seismic isolation bearing that functions as an elastic sliding bearing can function as a sliding bearing. Thereby, the characteristic of the seismic isolation apparatus before providing a connection member and the seismic isolation apparatus after providing a connection member can be changed.

  Since the present invention has the above-described configuration, the characteristics of the seismic isolation device that supports the building can be changed according to the characteristics of the disturbance acting on the building and the weight increase / decrease of the building.

It is an elevation view which shows the building which concerns on 1st Embodiment of this invention. It is a front view which shows the seismic isolation apparatus which concerns on 1st Embodiment of this invention. It is a plane sectional view showing the seismic isolation device concerning a 1st embodiment of the present invention. It is a diagram which shows the effect of the seismic isolation apparatus which concerns on 1st Embodiment of this invention. It is a front view which shows the variation of the seismic isolation apparatus which concerns on 1st Embodiment of this invention. It is a front view which shows the variation of the seismic isolation apparatus which concerns on 1st Embodiment of this invention. It is a plane sectional view showing the variation of the seismic isolation device concerning a 1st embodiment of the present invention. It is a front view which shows the variation of the seismic isolation apparatus which concerns on 1st Embodiment of this invention. It is a front view which shows the seismic isolation apparatus which concerns on 2nd Embodiment of this invention. It is a plane sectional view showing the seismic isolation device concerning a 2nd embodiment of the present invention. It is front sectional drawing which shows the variation of the seismic isolation apparatus which concerns on 2nd Embodiment of this invention. It is a diagram which shows the effect of the seismic isolation apparatus which concerns on 2nd Embodiment of this invention. It is an elevation view which shows the building which concerns on 3rd Embodiment of this invention. It is the front view and front sectional view which show the seismic isolation apparatus which concerns on 3rd Embodiment of this invention. It is plane sectional drawing which shows the seismic isolation apparatus which concerns on 3rd Embodiment of this invention. It is a diagram which shows the effect of the seismic isolation apparatus which concerns on 3rd Embodiment of this invention. It is front sectional drawing which shows the variation of the seismic isolation apparatus which concerns on 3rd Embodiment of this invention. It is the front view and front sectional view which show the seismic isolation apparatus which concerns on 4th Embodiment of this invention. It is a diagram which shows the effect of the seismic isolation apparatus which concerns on 4th Embodiment of this invention. It is front sectional drawing which shows the variation of the seismic isolation apparatus which concerns on 4th Embodiment of this invention. It is the front view and front sectional drawing which show the seismic isolation apparatus which concerns on 5th Embodiment of this invention. It is a plane sectional view showing the seismic isolation device concerning a 5th embodiment of the present invention. It is a diagram which shows the effect of the seismic isolation apparatus which concerns on 5th Embodiment of this invention. It is front sectional drawing which shows the variation of the seismic isolation apparatus which concerns on 5th Embodiment of this invention.

  Embodiments of the present invention will be described with reference to the drawings. First, the seismic isolation device according to the first embodiment of the present invention, and its operation and effect will be described.

  As shown in the elevation view of FIG. 1B and the front view of FIG. 2B, the seismic isolation device 10 of the first embodiment is attached to and detached from the laminated rubber 12 as a seismic isolation bearing and the laminated rubber 12. And an annular member 14 as rigidity changing means attached in a possible manner.

  In the elevation view of FIG. 1 (a) and the front view of FIG. 2 (a), the seismic isolation device 10 with the annular member 14 removed is shown in FIGS. 1 (b) and 2 (b). Shows the seismic isolation device 10 with the annular member 14 attached thereto.

  As shown in FIG. 2 (a), the laminated rubber 12 includes a laminated rubber body 16 formed by alternately laminating rubber layers and steel plates, an upper flange 18 provided on the upper surface of the laminated rubber body 16, and a laminated rubber body. 1 and a lower flange 20 provided on the lower surface of the rubber body 16, and is installed on a building foundation 24 that constitutes a lower structure of the building 22 as shown in FIG. The building main body 26 as a structure constituting the upper structure is isolated from the earthquake.

  In the first embodiment, as shown in FIG. 1 (b), by attaching an annular member 14 to the laminated rubber 12 in the state of FIG. 1 (a), the laminated rubber 12 as a seismic isolation bearing according to the trigger information T. The characteristic of the seismic isolation device 10 is changed.

  As the trigger information T, information on the typhoon approaching the building 22 (for example, the expected magnitude of wind load), which is a characteristic of the disturbance acting on the building 22, and the extension, reduction, reconstruction, use of the building 22 For example, information on the weight of the building body 26 that increases or decreases due to a change or the like can be given.

  For example, when it is predicted that a typhoon will reach the building 22 a few days later, the horizontal rigidity of the laminated rubber 12 is increased by the annular member 14 to change the characteristics of the seismic isolation device 10, and the seismic isolation cycle of the building body 26 is changed. To shorten. Thereby, the shaking of the building main body 26 at the time of a typhoon can be made small, and living property can be improved.

  Further, for example, the annular rubber member 14 can be used to increase the seismic isolation cycle of the building body 26 with respect to the weight of the building body 26 that increases or decreases due to extension, reduction, reconstruction, application change, or the like. The characteristic of the seismic isolation device 10 is changed by changing the horizontal rigidity.

  As shown in FIG. 2 (b) and FIG. 3 (a), which is a cross-sectional view taken along the line AA of FIG. 2 (b), the annular member 14 is constituted by a cylindrical member 28 made of steel. The constraining members 30A and 30B, which are substantially equally divided into two parts, are joined together by bolts 32 and nuts 34 to integrate the constraining members 30A and 30B. The cylindrical member 28 may be formed by integrating three or more constraining members.

  As shown in FIG. 3A, the annular member 14 has the restraining members 30 </ b> A and 30 </ b> B disposed so as to surround the outer peripheral portion of the laminated rubber main body 16, and both ends of the restraining members 30 </ b> A and 30 </ b> B are connected with bolts 32 and nuts 34. Are attached to the laminated rubber 12 by integrating the restraining members 30A and 30B.

  Thereby, the horizontal rigidity of the laminated rubber 12 can be increased by constraining the lower portion of the laminated rubber body 16 by the cylindrical member 28 and reducing the shear deformation region of the laminated rubber body 16. Therefore, the characteristic of the seismic isolation device 10 is changed, and the seismic isolation cycle of the building body 26 can be shortened.

  For example, as shown in the graph of FIG. 4, the value 36 in the seismic isolation device 10 in FIG. 2B can be set to 38 as opposed to the value 36 in the seismic isolation device 10 in FIG. The vertical axis Y of the graph in FIG. 4 indicates the horizontal force acting on the building body 26, and the horizontal axis X indicates the amount of movement of the building body 26 relative to the building foundation 24. That is, the horizontal rigidity (slope of value 38) of the seismic isolation device 10 in FIG. 2 (b) can be made larger than the horizontal rigidity (slope of value 36) of the seismic isolation device 10 in FIG. 2 (a).

  As described above, the seismic isolation device 10 according to the first embodiment changes the rigidity characteristics of the laminated rubber 12 as the seismic isolation bearing by the annular member 14, so that the characteristics of the disturbance acting on the building main body 26 and the building main body are changed. The characteristics can be changed according to the weight increase / decrease of 26.

  The first embodiment of the present invention has been described above.

  In the first embodiment, an example in which one annular member 14 is attached to the laminated rubber 12 as in the seismic isolation device 10 shown in FIG. 2B is shown, but a plurality of annular members 14 are arranged in the vertical direction. You may arrange and attach so that it may pile up. For example, like the seismic isolation device 42 shown in the front view of FIG. 2C, the two annular members 14 may be arranged to be stacked in the vertical direction and attached to the laminated rubber 12. In this way, since the shear deformation region of the laminated rubber body 16 can be further reduced, the value 40 can be set in the seismic isolation device 42 of FIG. 2C as shown in the graph of FIG. That is, the horizontal stiffness (inclination of value 40) of the seismic isolation device 10 in FIG. 2 (c) can be made larger than the horizontal rigidity (inclination of value 38) of the seismic isolation device 10 in FIG. 2 (b). In this case, stress transmission between the annular members 14 arranged above and below is not essential, and it is only necessary to suppress the shear deformation of the laminated rubber body 16 in the portion surrounded by the annular member 14.

  Further, as in the seismic isolation device 44 shown in the plan sectional view of FIG. 3B, the compression force P is applied from the restraining members 30A, 30B to the laminated rubber body 16 in the radial direction by tightening the bolts 32. May be. In this way, the portion of the laminated rubber body 16 surrounded by the annular member 14 is compressed and restrained without play, and the horizontal rigidity of the laminated rubber body 16 can be reliably changed.

  Furthermore, in the first embodiment, the example in which the annular member 14 is configured by the steel cylindrical member 28 has been shown. However, like the annular member 48 included in the seismic isolation device 46 shown in the front view of FIG. It may be formed by winding a belt-like rubber 50 around the outer peripheral surface of the main body 16.

  Moreover, like the annular member 54 provided in the seismic isolation device 52 shown in the front views of FIGS. 6A and 6B, an annular tube 56 disposed and attached so as to surround the outer peripheral portion of the laminated rubber body 16. It may be configured by.

  In the state of FIG. 6A and FIG. 7A which is a BB cross-sectional view of FIG. 6A, the tube 56 is in a deflated state. When the tube 56 is filled with a fluid such as air, oil or water by a pump or the like, it is shown in FIG. 6B and FIG. 7B which is a cross-sectional view taken along the line CC in FIG. As such, the tube 56 is in a fully expanded state. As a result, a compressive force P is applied from the tube 56 in the radial direction of the laminated rubber body 16 to compress and restrain the laminated rubber body 16 in the portion surrounded by the annular member 54, thereby increasing the horizontal rigidity of the laminated rubber body 16. . When the horizontal rigidity of the laminated rubber body 16 is reduced, fluid such as air, oil, and water filled in the tube 56 is discharged by a pump or the like so that the tube 56 is deflated.

  Furthermore, like the seismic isolation device 58 shown to the front view of Fig.8 (a)-(d), you may arrange | position so that the several tube 56 may be piled up and down, and may attach it to the laminated rubber 12. FIG. FIG. 8A shows a state in which all the tubes 56 are deflated, and FIG. 8B shows a state in which the lowermost tube 56 is completely swollen, and FIG. FIG. 8 shows a state where the tubes 56 of the lowermost layer and the intermediate layer are completely expanded, and FIG. 8D shows a state where all the tubes 56 are completely expanded. Since the shear deformation region of the laminated rubber body 16 is smaller in the state of FIG. 8C than in the state of FIG. 8B, the laminated rubber body 16 of FIG. 8C is more than that of FIG. 8B. The horizontal rigidity of the laminated rubber body 16 is smaller in the state of FIG. 8 (d) than in the state of FIG. 8 (c), so that the shear deformation region of the laminated rubber body 16 is smaller than that of FIG. 8 (c). It is possible to increase the horizontal rigidity of the laminated rubber body 16 shown in FIG.

  In the first embodiment, the trigger information T is an example of the typhoon information or the weight information of the building body 26. However, the trigger information T is a characteristic of disturbance acting on the building body 26 as a structure or a building. Any information on the weight increase / decrease of the main body 26 may be used. For example, the trigger information T is information on input earthquake motion, building response (response acceleration, response displacement) at the time of an earthquake obtained by a sensor installed in the building 22 or around the building 22, and predominance of earthquake motion that can reach the building 22. Information such as an earthquake early warning that informs characteristics such as frequency and scale may be used.

  For these trigger information T, it is necessary to change the characteristics of the seismic isolation device in a short time or in real time, but in the case of the seismic isolation devices 52 and 58 shown in FIGS. Correspondingly, the characteristics of the seismic isolation devices 52 and 58 can be changed in a short time or in real time, and the building body 26 can be seismically isolated with an optimal seismic isolation cycle.

  Next, the seismic isolation device according to the second embodiment of the present invention, and its operation and effect will be described. In the description of the second embodiment, components having the same configurations as those of the first embodiment are denoted by the same reference numerals and are appropriately omitted.

  As shown in FIG. 10 which is a front view of FIG. 9 and a DD cross-sectional view of FIG. 9, the seismic isolation device 60 of the second embodiment includes a laminated rubber 12 as a seismic isolation bearing, and rigidity changing means. A plurality of wall members 62 are included.

  The wall member 62 is arranged in a circle in plan view so as to surround the laminated rubber body 16. The wall member 62 is disposed so as to have a gap G between the wall member 62 and the outer peripheral surface of the laminated rubber body 16, and is provided so as to be movable in the radial direction of the laminated rubber 12.

  In the second embodiment, as shown in FIG. 9, by attaching a wall member 62 to the seismic isolation device 60, the rigidity characteristic of the laminated rubber 12 as the seismic isolation bearing is changed according to the trigger information T, and the seismic isolation device Change 60 properties.

  In the seismic isolation device 60, the lower part of the laminated rubber body 16 is restrained by the wall member 62 in a state where the shear deformation of the laminated rubber body 16 proceeds and the outer peripheral surface of the laminated rubber body 16 contacts the wall member 62.

  Thereby, the shear deformation region of the laminated rubber body 16 is reduced, and the horizontal rigidity of the laminated rubber 12 is increased as indicated by a value 64 in the graph of FIG. Therefore, the characteristic of the seismic isolation device 60 is changed, and the seismic isolation cycle of the building body 26 can be shortened. In the graph of FIG. 11, the vertical axis Y indicates the horizontal force acting on the building body 26, and the horizontal axis X indicates the amount of movement of the building body 26 relative to the building foundation 24. Further, when the wall member 62 is moved to change the size of the gap G, the timing at which the horizontal rigidity of the laminated rubber 12 increases can be changed.

  As described above, the seismic isolation device 60 according to the second embodiment has the characteristics of the disturbance acting on the building body 26 by changing the rigidity characteristics of the laminated rubber 12 as the seismic isolation bearing by providing the wall member 62. The characteristics can be changed according to the weight increase or decrease of the building body 26.

  The second embodiment of the present invention has been described above.

  In the second embodiment, an example in which a plurality of wall members 62 are arranged has been described. However, if the shear deformation of the laminated rubber main body 16 can be restrained by the wall members 62, the number, shape, and size of the wall members 62 are not limited. It may be something like this.

  In the second embodiment, the wall member 62 is movably provided. However, the wall member 62 may not be moved. In this case, the wall member 62 may be an annular member disposed so as to surround the laminated rubber main body 16.

  Furthermore, as shown in the front sectional view of FIG. 12, a curved or refracted piezoelectric element 68 may be disposed between the inner wall surface of the wall member 62 and the outer peripheral surface of the laminated rubber body 16. In this way, when the piezoelectric element 68 is energized, the piezoelectric element 68 is pressed against the inner wall surface of the wall member 62 and behaves like an elastic member. As in 66, it can be changed continuously.

  Next, the seismic isolation device according to the third embodiment of the present invention, and its operation and effect will be described. In the description of the third embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and are appropriately omitted.

  As shown in the elevation view of FIG. 13 (b) and the front sectional view of FIG. 14 (b), the seismic isolation device 70 of the third embodiment is detachably attached to an elastic sliding bearing 72 as a seismic isolation bearing. And a connecting member 74 as rigidity changing means.

  In the elevation view of FIG. 13 (a) and the front view of FIG. 14 (a), the seismic isolation device 70 with the connecting member 74 removed is shown in FIGS. 13 (b) and 14 (b). Shows the seismic isolation device 70 with the connecting member 74 attached thereto.

  As shown in FIG. 14A, the elastic sliding bearing 72 is configured by providing a sliding bearing 76 on the upper surface or the lower surface of the laminated rubber 12 (FIG. 14A shows a sliding bearing on the lower surface of the laminated rubber 12. As shown in FIG. 13A, the upper structure of the building 78 is configured by being installed on the building foundation 80 that forms the lower structure of the building 78. The building body 82 is supported as a seismic isolation structure.

  As shown in FIG. 14 (a), the sliding bearing 76 is attached to the sliding plate 84 provided on the upper surface of the building foundation 80 and the lower surface of the lower flange 20 of the laminated rubber 12 and is slidable on the upper surface of the sliding plate 84. And a material 86.

  14 (b) and FIG. 15 which is an EE cross-sectional view of FIG. 14 (b), the connecting member 74 is disposed around the laminated rubber body 16, and is connected to the upper flange 18 of the laminated rubber 12. The lower flange 20 is constituted by a steel cylindrical member 90 that restrains the relative movement of the upper flange 18 and the lower flange 20 in the horizontal direction by connecting the lower flange 20 with bolts 88. The cylindrical member 90 is a member that can be divided into two substantially equally. The cylindrical member 90 may be divided into three or more.

  In the third embodiment, as shown in FIG. 13 (b), by attaching a connecting member 74 to the elastic sliding bearing 72 in the state of FIG. The rigidity characteristic of the support 72 is changed, and the characteristic of the seismic isolation device 70 is changed.

  Specifically, by connecting the upper flange 18 and the lower flange 20 of the laminated rubber 12 by the connecting member 74, the elastic sliding bearing 72 can function as a sliding bearing. Thereby, the characteristic of the seismic isolation apparatus 70 before providing the connection member 74 and the seismic isolation apparatus 70 after providing the connection member 74 can be changed.

  For example, as shown in the graph of FIG. 16, the value 92 can be set to 94 in the seismic isolation device 70 of FIG. 13B as opposed to the value 92 in the seismic isolation device 70 of FIG. The vertical axis Y in the graph of FIG. 16 indicates the horizontal force acting on the building body 82, and the horizontal axis X indicates the amount of movement of the building body 82 relative to the building foundation 80. That is, the initial stiffness (inclination of value 94) of the seismic isolation device 70 in FIG. 13 (b) can be made larger than the initial stiffness (inclination of value 92) of the seismic isolation device 70 in FIG. 13 (a). Moreover, the timing which the seismic isolation apparatus 70 slides and deforms can be advanced.

  As described above, the seismic isolation device 70 according to the third embodiment changes the rigidity characteristics of the elastic sliding bearing 72 as the seismic isolation bearing by the connecting member 74, so that the characteristics of the disturbance acting on the building body 82 and the building The characteristics can be changed according to the weight increase / decrease of the main body 82.

  The third embodiment of the present invention has been described above.

  In the third embodiment, the connecting member 74 is a cylindrical member 90. However, the connecting member 74 connects the upper flange 18 and the lower flange 20 of the laminated rubber 12 to connect the upper flange 18 and the lower flange. What is necessary is just to be able to restrain the relative movement of 20 in the horizontal direction. For example, a plurality of connecting members 74 may be arranged as rod-like members or plate-like members.

  Moreover, in 3rd Embodiment, although the example which connected the upper flange 18 and the lower flange 20 of the laminated rubber 12 with the volt | bolt 88 was shown, front sectional drawing of Fig.17 (a) and front sectional drawing of FIG.17 (b) are shown. Like the seismic isolation device 96 shown in the drawing, the pin member 100 that moves up and down by the actuator 98 or manually is passed through the through hole 140 formed in the lower flange of the cylindrical member 90 and the insertion hole 102 formed in the lower flange 20. You may connect the upper flange 18 and the lower flange 20 of the laminated rubber 12 by inserting.

  Next, a seismic isolation device according to a fourth embodiment of the present invention, and its operation and effects will be described. In the description of the fourth embodiment, components having the same configurations as those of the third embodiment are denoted by the same reference numerals and are appropriately omitted.

  As shown in the front view of FIG. 18A and the front sectional view of FIG. 18B, the seismic isolation device 104 of the fourth embodiment is detachably attached to an elastic sliding bearing 72 as a seismic isolation bearing. And an auxiliary friction member 106 as a rigidity changing means.

  18A shows the seismic isolation device 104 with the auxiliary friction member 106 removed, and FIG. 18B shows the seismic isolation device 104 with the auxiliary friction member 106 attached. ing.

  As shown in FIG. 18B, the auxiliary friction member 106 is provided with a sliding material 108 made of the same material as the sliding material 86 on the lower surface, and the auxiliary friction member 106 is fixed to the lower flange 20 by a bolt 110. Accordingly, the sliding material 108 is arranged in an annular shape around the sliding material 86 in a plan view so that the lower surface of the sliding material 86 and the lower surface of the sliding material 108 are flush with each other. That is, by attaching the auxiliary friction member 106 to the elastic sliding support 72, the area of the sliding material (sliding material 86, 108) sliding on the sliding plate 84 is increased, and the frictional resistance is increased.

  In the fourth embodiment, as shown in FIG. 18B, a sliding material (sliding material) that slides on the sliding plate 84 by attaching the auxiliary friction member 106 to the elastic sliding bearing 72 in the state of FIG. 86, 108), the characteristic of the elastic sliding bearing 72 as the seismic isolation bearing is changed according to the trigger information T, and the characteristic of the seismic isolation device 104 is changed.

  For example, as shown in the graph of FIG. 19, the value 112 can be set to 114 in the seismic isolation device 104 in FIG. In the graph of FIG. 19, the vertical axis Y indicates the horizontal force acting on the building body 82, and the horizontal axis X indicates the amount of movement of the building body 82 relative to the building foundation 80. That is, the sliding deformation timing of the seismic isolation device 104 in FIG. 18B can be delayed (that is, the sliding load is increased) as compared with the seismic isolation device 104 in FIG.

  As described above, the seismic isolation device 104 of the fourth embodiment changes the rigidity characteristics of the elastic sliding bearing 72 as the seismic isolation bearing by the auxiliary friction member 106, thereby providing the characteristics of the disturbance acting on the building body 82. The characteristics can be changed according to the weight increase / decrease of the building body 82.

  The fourth embodiment of the present invention has been described above.

  In the fourth embodiment, the sliding material 108 of the auxiliary friction member 106 is made of the same material as that of the sliding material 86. However, the sliding material 108 is made of a material having a friction coefficient larger than that of the sliding material 86. May be.

  Moreover, in 4th Embodiment, although the auxiliary | assistant friction member 106 was fixed to the lower flange 20 with the volt | bolt 110, the front sectional drawing of Fig.20 (a) and the front sectional drawing of FIG.20 (b) show. Like the seismic isolation device 116, the auxiliary friction member 106 may be moved up and down by the actuator 118 or manually.

  Next, a seismic isolation device according to a fifth embodiment of the present invention, and its operation and effects will be described. In the description of the fifth embodiment, the same components as those in the third embodiment are denoted by the same reference numerals, and are appropriately omitted.

  As shown in the front view of FIG. 21A and the front view of FIG. 21B, the seismic isolation device 120 of the fifth embodiment is detachably attached to an elastic sliding bearing 72 as a seismic isolation bearing. It has a fixing member 122 as rigidity changing means.

  FIG. 21 (a) shows the seismic isolation device 120 with the fixing member 122 removed, and FIG. 21 (b) shows the seismic isolation device 120 with the fixing member 122 attached. .

  As shown in FIG. 21B and FIG. 22 which is a sectional view taken along line FF in FIG. 21B, the fixing member 122 is configured by a steel ring member 124, and a steel pin member 126. Are provided to protrude downward. By sandwiching the lower flange 20 between sandwiching members 128A and 128B obtained by equally dividing the ring member 124 into two parts, both ends of the sandwiching members 128A and 128B are joined to each other with bolts 32 and nuts 34. The ring member 124 is integrated with the lower flange 20, and the fixing member 122 is attached to the elastic sliding bearing 72. The ring member 124 may be formed by integrating three or more clamping members.

  As shown in FIG. 21 (b), the fixing member 122 is attached to the elastic sliding support 72 such that the pin member 126 is inserted into the insertion hole 130 provided in the building foundation 24. Thereby, the lower flange 20 is fixed to the building foundation 80 with respect to the horizontal direction.

  In the fifth embodiment, as shown in FIG. 21 (b), the fixing member 122 is attached to the elastic sliding support 72 in the state of FIG. 21 (a) so that the elastic sliding support 72 functions as a laminated rubber that does not slide. Can do. Thereby, the characteristic of the seismic isolation apparatus 120 before providing the fixing member 122 and the seismic isolation apparatus 120 after providing the fixing member 122 can be changed.

  For example, as shown in the graph of FIG. 23, the value 132 in the seismic isolation device 120 in FIG. 21B can be set to the value 134 in the seismic isolation device 120 in FIG. The vertical axis Y of the graph of FIG. 23 indicates the horizontal force acting on the building body 82, and the horizontal axis X indicates the amount of movement of the building body 82 relative to the building foundation 80.

  As described above, the seismic isolation device 120 of the fifth embodiment changes the characteristics of the elastic sliding bearing 72 as the seismic isolation bearing by the fixing member 122, thereby allowing the characteristics of the disturbance acting on the building main body 82 and the building main body to be changed. The characteristics can be changed according to the weight increase / decrease of 82.

  The fifth embodiment of the present invention has been described above.

  In addition, in 5th Embodiment, although the example which attached the fixing member 122 to the lower flange 20 was shown, the seismic isolation apparatus 136 shown to front sectional drawing of Fig.24 (a) and front sectional drawing of FIG.24 (b) is shown. As described above, the lower flange 20 is fixed to the building foundation 80 with respect to the horizontal direction by inserting the actuator 138 or the pin member 126 that moves up and down manually into the insertion hole 130 formed in the sliding plate 84 and the building foundation 80. May be.

  The first to fifth embodiments of the present invention have been described above.

  In the first to fifth embodiments, the seismic isolation devices 10, 42, 44, 46, 52, 58, 60, 70, 96, 104, 116, 120, 136 are replaced with the foundation exemption on the building foundations 24, 80. Although the example installed in the seismic layer was shown, the seismic isolation devices 10, 42, 44, 46, 52, 58, 60, 70, 96, 104, 116, 120, 136 of the first to fifth embodiments are buildings. It may be installed in the middle seismic isolation layer.

  The first to fifth embodiments of the present invention have been described above. However, the present invention is not limited to these embodiments, and the first to fifth embodiments may be used in combination. Needless to say, the present invention can be implemented in various forms without departing from the gist of the invention.

10, 42, 44, 46, 52, 58, 60, 70, 96, 104, 116, 120, 136 Seismic isolation device 12 Laminated rubber (Seismic isolation bearing)
14 annular member (rigidity changing means)
18 Upper flange 20 Lower flange 26, 82 Building body 48, 54 Annular member (rigidity changing means)
62 Wall member (rigidity changing means)
72 Elastic sliding bearing (Seismic isolation bearing)
74 Connecting member (rigidity changing means)
76 Sliding bearing 106 Auxiliary friction member (rigidity changing means)
122 Fixing member (rigidity changing means)

Claims (2)

Seismic isolation bearings with laminated rubber to support the structure;
Stiffness changing means for changing the stiffness characteristics of the seismic isolation bearing according to the characteristics of disturbance acting on the structure or the weight increase or decrease of the structure;
Seismic isolation device. The seismic isolation bearing is an elastic sliding bearing configured by providing a sliding bearing on the upper surface or the lower surface of the laminated rubber,
The rigidity changing means is a connecting member that is disposed around the laminated rubber and connects the upper flange and the lower flange of the laminated rubber to restrain relative movement of the upper flange and the lower flange in the horizontal direction. Item 1. The seismic isolation device according to item 1.

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