Movement control device

Abstract

To provide a movement regulating device capable of inhibiting damage of a building and a retaining wall as a result of collision of an upper structure with the retaining wall.SOLUTION: A movement regulating device comprises a first bundle material, a pair of second bundle materials 23, a buffer member, a deformation member 24, and a pin joining part 25 that joins the second bundle materials 23 and the deformation member 24. The deformation member 24 is pressed against, when a relative movement amount of an upper structure to a lower structure is a predetermined amount or larger, the first bundle material or the second bundle material 23 via the buffer member to be deformed, absorbs kinetic energy and also regulates the movement amount to limiting displacement or less of a base isolation layer. The pin joining part 25 has a splice plate 252 fixed to the second bundle material 23 and in which bolt holes 252a are formed, long holes 243 formed on the deformation member 24 and are long in the opposing direction where the pair of second bundle materials 23 are opposed to each other, and bolts inserted into the bolt holes 252a and the long holes 243a and fastened with nuts.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present invention relates to a movement control device.

Background Art

[0002] In the foundation of a building or in the intermediate layer of a building having an upper structure and a lower structure, a support structure called a seismic isolation layer that greatly deforms during an earthquake is provided. The seismic isolation layer is configured using, for example, laminated rubber or springs. By providing the seismic isolation layer, during an earthquake, the seismic isolation layer deforms greatly, reducing the response of the building above the seismic isolation layer and suppressing damage to the building. In the design of a building, usually, the deformation of the seismic isolation layer against the assumed seismic motion is calculated, and the necessary clearance is set.

[0003] In a seismic isolation building with a seismic isolation layer provided in the foundation, an appropriate clearance is ensured between the building and a retaining wall provided on the foundation side, preventing the building from colliding with the retaining wall. In a seismic isolation building with a seismic isolation layer provided in the intermediate layer, it is necessary to ensure an appropriate clearance for the elevator shaft and equipment piping in the intermediate layer.

[0004] In recent years, the need for a fail-safe mechanism against seismic motion exceeding the assumption has been increasing. Especially in seismic isolation buildings, an excessive deformation suppression mechanism is required to prevent collision with the retaining wall when the seismic isolation layer is excessively deformed and to prevent the seismic isolation device from breaking.

[0005] To prevent excessive deformation of the seismic isolation layer, for example, a technique related to a fail-safe mechanism described in Patent Document 1 is known. This fail-safe mechanism includes a plate-like member fixed in parallel with a damper. One end side of the plate-like member is pin-jointed to a circular hole, and the other end side is pin-jointed to a long hole. Also, a technique related to shock buffering using rubber or the like is known for alleviating the shock to the building due to the collision of the retaining wall of the building (see, for example, Patent Documents 2 to 4).

Prior Art Documents

Patent Documents

[0006]

Patent Document 1

Patent Document 2

Patent Document 3

Patent Document 4

Summary of the Invention

Problems to be Solved by the Invention

[0007] The fail-safe mechanism described in Patent Document 1 is often provided separately from the damper designed for seismic isolation of a building, and has a complicated mechanism such as a rod-shaped member provided separately to suppress excessive deformation, resulting in an increase in cost. Further, in order to suppress excessive deformation by using a collision buffer material such as rubber as in the technology described in Patent Document 2 and the like, a very large number of units are required, and it becomes difficult to arrange the collision buffer material when the building scale is large. Furthermore, according to this technology, there is a risk that the retaining wall will yield after excessive deformation, which may hinder the continuous use of the building.

[0008] Therefore, the present invention has been made in view of the above circumstances, and provides a movement restriction device capable of suppressing damage to a building or a retaining wall when an upper structure collides with a retaining wall or the like.

Means for Solving the Problems

[0009] In order to achieve the above object, the present invention employs the following means. That is, the movement restriction device according to the present invention is a movement restriction device installed in a seismic isolation layer between an upper structure and a lower structure disposed below the upper structure, Provided below the upper structure a first bundle member that moves in conjunction with the upper structure, Provided above the lower structure a pair of second bundle members that move in conjunction with the lower structure and are arranged opposite to each other with a space therebetween, and , a deformation member, the first bundleOn the surface of the material facing the deformation member side A fixed buffer member and a pin joint for joining the second bundle member and the deformable member, wherein the deformable member, when the relative movement amount of the upper structure with respect to the lower structure reaches a predetermined amount or more, is the first bundle via the buffer member In the material Pressed and deformed to absorb kinetic energy, and regulating the movement amount to be equal to or less than the limit displacement of the seismic isolation layer. The pin joint includes a splice plate fixed to the second bundle member and having bolt holes, formed in the deformable member, a long hole that is long in the facing direction in which a pair of the second bundle members face each other, and a bolt inserted through the bolt hole and the long hole and having a nut fastened thereto.

[0010] In the movement restricting device configured as described above, when a relative movement amount occurs between the upper structure and the lower structure, the deformable member joined by the second bundle member and the pin joint rotates, and the deformable member restricts the movement amount to be equal to or less than the limit displacement of the seismic isolation layer. Therefore, it is possible to prevent the seismic isolation device from being damaged or broken due to excessive deformation and the upper structure from colliding with a retaining wall or the like and damaging the building or the retaining wall.

[0011] Further, in the movement restricting device according to the present invention, the deformable member may include a long member extending in the facing direction and having both ends joined to the second bundle member, and a plurality of rib plates fixed to the long member at intervals in the facing direction.

[0012] In the movement restricting device configured as described above, a plurality of rib plates are fixed to the deformable member at intervals in the facing direction (the extending direction of the long member). Therefore, local deformation of the long member can be suppressed.

[0013] Further, in the movement restricting device according to the present invention, the long member may be an H-shaped steel with the web plate surface arranged in the vertical direction, and the rib plate may be arranged with the plate surface facing in the facing direction.

[0014] In the movement restricting device configured as described above, since a rib plate is provided between the flanges of the H-shaped steel, a deformation member is formed, and thus the deformation member can be easily manufactured.

[0015] Further, in the movement restricting device according to the present invention, the deformation member may be replaceable.

[0016] In the movement restricting device configured as described above, when residual deformation occurs in the deformation member, the deformation member can be replaced.

[0017] Further, in the movement restricting device according to the present invention, the deformation member may plastically deform to absorb the kinetic energy.

[0018] In the movement restricting device configured as described above, when the deformation member bends and plastically deforms, it is possible to absorb the kinetic energy when a relative movement amount between the lower structure and the upper structure occurs.

Advantages of the Invention

[0019] According to the movement restricting device of the present invention, it is possible to suppress damage to a building or a retaining wall when the upper structure collides with a retaining wall or the like.

Brief Description of the Drawings

[0020]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Mode for Carrying Out the Invention

[0021] Hereinafter, an embodiment of the movement restricting device according to the present invention will be described with reference to the drawings.

[0022] As shown in FIG. 1, the building 1 includes an upper structure 2, a lower structure 3 disposed below the upper structure 2, and a movement restricting device (fail-safe stopper) 20. An earthquake isolation layer 10 is provided between the upper structure 2 and the lower structure 3. The earthquake isolation layer 10 supports the upper structure 2 so as to be movable with respect to the lower structure 3. The building 1 is, for example, a seismic isolation building provided with the earthquake isolation layer 10 on the foundation side. The building 1 may be a seismic isolation building provided with the earthquake isolation layer 10 on an intermediate floor.

[0023] The upper structure 2 is, for example, a building having multiple floors. The lower structure 3 is a structure integrated with the foundation of the building 1 when the building 1 is a seismic isolation building provided with the earthquake isolation layer 10 on the foundation side. The lower structure 3 is a building having multiple floors when the building 1 is a seismic isolation building provided with the earthquake isolation layer 10 on an intermediate floor.

[0024] In the seismic isolation layer 10, for example, laminated rubber in which rubber plates, which are elastic members, and steel plates are alternately laminated is installed. The seismic isolation layer 10 is configured to elastically deform when a relative displacement occurs between the superstructure 2 and the substructure 3 during an earthquake, making it difficult for the displacement of the substructure 3 to be transmitted to the superstructure 2. As the laminated rubber, other elastic members such as metal springs may be used in addition to the rubber plates.

[0025] In the seismic isolation layer 10, a movement restricting device 20 is installed that restricts the relative movement amount of the superstructure 2 with respect to the substructure 3. The seismic isolation layer 10 and the movement restricting device 20 together constitute a seismic isolation structure 30.

[0026] As shown in FIG. 2, the movement restricting device 20 includes a first tie member 21, a buffer member 22, a pair of second tie members 23, a deformation member 24, and a pin joint portion 25. Here, the direction along the horizontal plane of the pair of second tie members 23 that are arranged to face each other with an interval is defined as the X direction (opposing direction). The direction along the horizontal plane and orthogonal to the X direction is defined as the Y direction.

[0027] The first tie member 21 is provided at the lower part of the superstructure 2 (see FIG. 1). The first tie member 21 is formed to protrude downward from the lower part of the superstructure 2. The first tie member 21 is, for example, integrally formed with the lower part of the superstructure 2. When the first tie member 21 is separate from the lower part of the superstructure 2, it is fixed to the lower part of the superstructure 2 so as to ensure sufficient strength. The first tie member 21 moves in conjunction with the superstructure 2.

[0028] The first tie member 21 is formed of, for example, H-shaped steel. The first tie member 21 has a pair of first flanges 211, a first web 212, and a lower rib 213.

[0029] The first flange 211 is formed in a plate shape. The plate surface of the first flange 211 faces the Y direction. The pair of first flanges 211 are arranged to face each other in the Y direction.

[0030] The first web 212 connects a pair of first flanges 211. The first web 212 is formed in a plate shape. The plate surface of the first web 212 faces the X direction.

[0031] The lower ribs 213 are provided on both sides of the plate surface of the first web 212 at the lower part of the first web 212. The lower ribs 213 are provided so as to connect a pair of first flanges 211. The lower ribs 213 are joined to a pair of first flanges 211 and the first web 212 by welding or the like. The lower ribs 213 are formed in a plate shape. The lower ribs 213 are formed in a substantially rectangular shape in plan view. The plate surface of the lower ribs 213 faces the vertical direction. A plurality of lower ribs 213 are provided at intervals in the vertical direction. In this embodiment, three lower ribs 213 are provided.

[0032] Note that another first bundle member 21 may be arranged at a position facing in the Y direction with the deformation member 24 (to be described later) interposed therebetween.

[0033] The buffer member 22 is fixed to the surface of the first bundle member 21 facing the deformation member 24 side. In this embodiment, the buffer member 22 is fixed to the surface 211a of the first flange 211 of the first bundle member 21 facing the deformation member 24 side. The buffer member 22 is formed of an elastic member such as rubber, for example.

[0034] The second bundle member 23 is provided on the upper part of the lower structure 3 (see FIG. 1). The second bundle member 23 is formed to protrude upward from the upper part of the lower structure 3. The second bundle member 23 is formed integrally with the upper part of the lower structure 3. When the second bundle member 23 is separate from the upper part of the lower structure 3, it is fixed to the upper part of the lower structure 3 so as to ensure sufficient strength. The second bundle member 23 moves in conjunction with the lower structure 3.

[0035] A pair of second bundle members 23 are arranged at intervals in the X direction. The second bundle member 23 is formed of, for example, H-shaped steel. The second bundle member 23 has a pair of second flanges 231, a second web 232, and a pair of cover plates 233 and 234.

[0036] The second flange 231 is formed in a plate shape. The plate surface of the second flange 231 faces in the Y direction. The pair of second flanges 231 are arranged to face each other in the Y direction.

[0037] The second web 232 connects the pair of second flanges 231 to each other. The second web 232 is formed in a plate shape. The plate surface of the second web 232 faces in the X direction.

[0038] The cover plate 233 connects the ends of the pair of second flanges 231 on the central side in the X direction (the side closer to the other second beam member 23). The cover plate 234 connects the ends of the pair of second flanges 231 on the end side in the X direction (the side farther from the other second beam member 23). The cover plates 233 and 234 are joined to the pair of second flanges 231 by welding or the like. The cover plates 233 and 234 are formed in a plate shape. The cover plates 233 and 234 are formed in a substantially rectangular shape. The plate surfaces of the cover plates 233 and 234 face in the X direction. The cover plates 233 and 234 can resist the torsional stress of the second beam member 23 and the beam axial force during an oblique collision. A handle hole 233a penetrating in the plate thickness direction is formed in the cover plate 233.

[0039] As shown in FIG. 3, an attachment plate 235 is provided above the cover plate 233. The attachment plate 235 is provided so as to connect the pair of second flanges 231. The attachment plate 235 is joined to the pair of second flanges 231 and the second web 232 by welding or the like. The attachment plate 235 is formed in a plate shape. The attachment plate 235 is formed in a substantially rectangular shape in plan view. The plate surface of the attachment plate 235 faces in the vertical direction.

[0040] The mounting plate 235 is formed with a plurality of bolt holes 235a that penetrate in the plate thickness direction. The bolt holes 235a are substantially circular in plan view. The diameter of the bolt holes 235a corresponds to the diameter of the bolts 256 (see FIG. 2) to be inserted. The plurality of bolt holes 235a are arranged at intervals in the Y direction.

[0041] As shown in FIG. 2, the deformable member 24 is joined to the second bundle member 23 by a pin joint portion 25 described later. The deformable member 24 has a long member 241 and a plurality of rib plates 246.

[0042] The long member 241 is formed of, for example, an H-shaped steel. The long member 241 has a shape that is long in the X direction. The long member 241 has a pair of flanges 242 and a web 243.

[0043] The flange 242 is formed in a plate shape. The plate surface of the flange 242 faces the Y direction. The pair of flanges 242 are arranged to face each other in the Y direction.

[0044] The web 243 connects the pair of flanges 242. The web 243 is formed in a plate shape. The plate surface of the web 243 faces the vertical direction.

[0045] The rib plate 246 is provided on the upper surface of the web 243. The rib plate 246 is provided so as to connect the pair of flanges 242. The rib plate 246 is joined to the pair of flanges 242 and the web 243 by welding or the like. The rib plate 246 is formed in a plate shape. The rib plate 246 is formed in a substantially rectangular shape when viewed from the X direction. The plate surface of the rib plate 246 faces the X direction. A plurality of rib plates 246 are provided at intervals in the X direction. The local deformation of the deformable member 24 is suppressed by the rib plates 246.

[0046] The pin joint 25 joins the second bundled member 23 and the deformable member 24. The pin joint 25 has an upper splice plate 251, a lower splice plate 252 (see Fig. 4), a long hole (loose hole) 243a formed in the web 243 of the deformable member 24 (see Fig. 4), and a bolt 253.

[0047] As shown in Fig. 3, the upper splice plate 251 is arranged so as to span the upper surface of the mounting plate 235 of the second bundled member 23 and the upper surface of the end portion in the X direction (length direction) of the web 243 of the deformable member 24.

[0048] The upper splice plate 251 is formed in a plate shape. The plate surface of the upper splice plate 251 faces the vertical direction. The upper splice plate 251 is formed in a rectangular shape when viewed from the vertical direction.

[0049] A plurality of bolt holes 251a and 251b penetrating in the plate thickness direction are formed in the upper splice plate 251. A plurality of bolt holes 251a are formed at intervals in the Y direction. A plurality of bolt holes 251b are formed at intervals in the Y direction. The row of the plurality of bolt holes 251a and the row of the plurality of bolt holes 251b are arranged at intervals in the X direction. The diameter of the bolt hole 251a is a diameter corresponding to the diameter of a bolt 253 (see Fig. 5) described later. The diameter of the bolt hole 251b is a diameter corresponding to the diameter of a bolt 256 (see Fig. 2) described later.

[0050] As shown in FIG. 4, the lower splice plate 252 is joined to the second bundle member 23. For example, the lower splice plate 252 is joined to the second flange 231 or the cover plate 233 of the second bundle member 23 by welding or the like. The lower splice plate 252 has substantially the same shape as the upper splice plate 251. The lower splice plate 252 is formed in a plate shape. The plate surface of the lower splice plate 252 faces the vertical direction. The lower splice plate 252 has a substantially rectangular shape when viewed from the vertical direction. A part of the lower splice plate 252 is disposed below the mounting plate 235, and the remaining portion of the lower splice plate 252 protrudes toward the central side in the X direction from the second bundle member 23.

[0051] A plurality of bolt holes 252a penetrating in the plate thickness direction are formed in the lower splice plate 252 at positions corresponding to the bolt holes 251a of the upper splice plate 251. A plurality of bolt holes 252a are formed with intervals in the Y direction. A plurality of bolt holes (not shown) penetrating in the plate thickness direction are formed in the lower splice plate 252 at positions corresponding to the bolt holes bolt holes 251b of the upper splice plate 251.

[0052] The bolt 256 (see FIG. 2) is inserted through the bolt hole 251b of the upper splice plate 251, the bolt hole 235a of the mounting plate 235, and the bolt hole (not shown) of the lower splice plate 252 and fastened to a nut (not shown). Thereby, the upper splice plate 251 is fixed to the mounting plate 235 and the lower splice plate 252 of the second bundle member 23.

[0053] Long holes 243a penetrating in the plate thickness direction are formed at both ends in the X direction (length direction) of the web 243 of the deformation member 24. The long holes 243a are long holes that are long in the X direction.

[0054] The bolt 253 (see Fig. 5) is inserted through the bolt hole 252a from below the lower splice plate 252, the long hole 243a formed in the web 243 of the deformation member 24, and the bolt hole 251a (see Fig. 3) of the upper splice plate 251, and the nut 254 is fastened (see Fig. 2). The joining of the second bundled material 23 and the deformation member 24 is a double shear joint through the upper splice plate 251 and the lower splice plate 252. As shown in Fig. 5, the deformation member 24 can rotate and deform with respect to the second bundled material 23.

[0055] To prevent the bolt 253 from interfering in the Y direction when the deformation member 24 rotates, the bolts 253 are arranged in a single row, and the bolts 253 are not fully tightened but only initially tightened to make them slippery.

[0056] When the relative movement amount of the upper structure 2 with respect to the lower structure 3 exceeds a predetermined value, the deformation member 24 is pressed against the first bundled material 21 via the buffer member 22. The deformation member 24 is pressed near the center against the first bundled material 21 via the buffer member 22 and bends, and plastically deforms when it exceeds the elastic deformation range. Since the deformation member 24 is joined to the second bundled material 23 by the pin joint 25, the deformation member 24 can undergo large plastic deformation. The deformation member 24 absorbs the kinetic energy generated by the relative movement of the upper structure 2 with respect to the lower structure 3 during plastic deformation. The deformation member 24 receives the first bundled material 21 during deformation and restricts the relative movement amount of the upper structure 2 with respect to the lower structure 3 to within the limit displacement of the seismic isolation layer.

[0057] The limit displacement is, for example, the displacement amount at which the laminated rubber of the seismic isolation layer 10 stretches to the limit and breaks. The limit displacement is set to be about several tens of centimeters, for example. Thereby, when a large deformation occurs in which the relative movement amount of the upper structure 2 with respect to the lower structure 3 is several tens of centimeters or more, the movement restricting device 20 restricts the relative movement of the upper structure 2 with respect to the lower structure 3, and can prevent the seismic isolation layer 10 from being destroyed. The movement restricting device 20 may be further provided in a direction orthogonal to the deformation member 24 or in other directions. A plurality of movement restricting devices 20 may be provided. The movement restricting device 20 may be retrofitted to a building in which the seismic isolation layer 10 is provided in an intermediate layer or a foundation.

[0058] Next, a method for replacing the deformation member 24 will be described. The deformation member 24 plastically deforms when it collides with the first bundled material 21, and residual deformation occurs. The deformation member 24 in which residual deformation has occurred needs to be replaced in order to ensure the energy absorption capacity again.

[0059] When replacing the deformation member 24, first, as shown in FIG. 3, remove the bolts 253, nuts 254, bolts 256 for joining the second bundled material 23 and the deformation member 24, and nuts (not shown), and remove the upper splice plate 251.

[0060] Next, as shown in FIG. 4, replace the deformation member 24 and attach the upper splice plate 251. When removing and attaching the upper splice plate 251, bolt construction can be performed from the hand hole 233a of the cover plate 233 of the second bundled material 23. The lower splice plate 252 is joined to the second bundled material 23 and is utilized as a support for the self-weight of the deformation member 24 during replacement.

[0061] FIG. 6 shows a relational diagram of the position of the bolt 253 during the rotation of the long hole and the energy absorption member (hereinafter, the "deformation member" may be referred to as the "energy absorption member"). Here, the outermost bolt core distance is D, the plastic strain μ is (the maximum plastic deformation amount of the energy absorption member / the elastic deformation amount of the energy absorption member) + 1, and the end rotation amount during the elastic deformation of the energy absorption member is defined as θ.

[0062] In the case of both - end pin joints, assuming the Young's modulus of the energy - absorbing member is E, the second - moment of area is I, the central concentrated load is P, and the span is L, the end rotation amount θ is expressed by the following formula (1).

[0063]

Equation

[0064] Also, assuming the full - plastic moment of the energy - absorbing member is M P then M P is expressed by the following formula (2).

[0065]

Equation

[0066] Therefore, from formula (1) and formula (2), the end rotation amount θ can be transformed into the following formula (3).

[0067]

Equation

[0068] Since the deformation amount at the center of the energy - absorbing member is very small with respect to the span L, assuming that the deformation amount at the center of the energy - absorbing member and the end rotation angle are in a proportional relationship, the end rotation angle θ P at the maximum plastic deformation of the energy - absorbing member is expressed by the following formula (4).

[0069]

Equation

[0070] As shown in Fig. 6, the horizontal displacement δ h of the outermost bolt at the maximum plastic deformation of the energy - absorbing member is expressed by the following formula (5), and the vertical displacement δ V is expressed by the following formula (6).

[0071]

Number

[0072]

Number

[0073] The length of the slotted hole (hereinafter, the "elongated hole" may be referred to as the "slotted hole") is set so that there is no interference when the bolt is deformed. Also, since the bolt hole size is usually the bolt diameter + 2m, if δ h is 1 mm or less, interference can be prevented in the direction perpendicular to the slotted hole (Y direction). To prevent interference in the direction perpendicular to the slotted hole, the maximum value of the geometrically determined plastic ratio μ is as shown in the following formula (7). V

[0074]

Number

[0075] As an example, the length of the slotted hole under the conditions of Table 1 is calculated. Note that a structural experiment has been carried out under these conditions, and the results will be described later.

[0076]

Table 1

[0077] From formula (3), the end rotation amount θ = 0.0061 is obtained. From formula (7), the maximum value of geometrically determined μ is 14.6.

[0078] From formula (5), when μ = 14.6, the horizontal displacement δ h of the outermost bolt is 11.3 mm, and the required length of the straight part of the slotted hole is 22.6 mm, which is twice that. Therefore, under this condition where the length L 孔 of the straight part of the slotted hole is set to 30 mm, it can be judged that the bolt movement amount is not a problem.

[0079] ​Next, the plastic deformation performance of the energy absorption member and the rotational deformation amount of the simple pin joint are confirmed by a structural experiment. The experimental conditions are as shown in Table 1, and a jack is used to gradually increase the load at the center of the energy absorption member.

[0080] Figure 7 shows the relationship between the central deformation amount and the load of the energy absorption member. In the figure, the calculated yield load is the value of P (central concentrated load) calculated by Equation (2). Due to the influence of strain hardening and the fact that the end simple pin joint is not a perfect pin and has a certain degree of fixity, etc., the load increased beyond the calculated yield load and then yielded. The maximum deformation amount was 101 mm. The elastic deformation amount δ = PL 3 / 48EI = 4.9 mm, and the plastic ratio could be confirmed up to about 20.

[0081] Figure 8 shows the relationship between the end rotation amount and the load of the energy absorption member. The maximum end rotation amount was 0.111 rad. Although it exceeds the geometrically determined maximum end rotation amount μθ = 0.09, the cause is the influence of the indentation deformation of the loose part and the bolt shear deformation.

[0082] As described above, through the structural experiment, it was confirmed that the plastic deformation amount of the energy absorption member and the rotational deformation amount of the simple pin joint exceed the designed deformation amount and the designed rotational deformation amount, and that it has the predetermined energy absorption performance.

[0083] Next, the analysis results will be described. As shown in Figure 9, a model in which a seismic isolation layer 10 is provided in the middle layer of Building 1 is exemplified. Building 1 is set to 46 floors, for example. The seismic isolation layer 10 is provided between the 34th and 35th floors of Building 1. The first natural period of Building 1 is 6.85 seconds in the X direction and 6.77 seconds in the Y direction.

[0084] The seismic wave input to Building 1 is, for example, the notification wave set to the Kobe phase level 2. The notification wave is a simulated seismic wave used for time history calculation. The notification wave is defined in the Ministry of Construction Notification No. 1461 in 2000. The notification wave has an acceleration response spectrum (notification spectrum) with a damping constant of 5%.

[0085] First, the response of Building 1 is analyzed in a state where there is no movement restriction device 20. The seismic waves input to Building 1 are set to waves scaled 1.575 times so that the maximum deformation of the intermediate layer seismic isolation is 75 cm in a state where there is no movement restriction device 20.

[0086] Below, for three types of models, namely the "no stopper" model without a seismic isolation fail-safe stopper, the "with stopper" model with this seismic isolation fail-safe stopper (movement restriction device 20) installed, and the "stopper rigid" model with the stopper as a rigid body (modeling the collision with the retaining wall), the maximum inter-story deformation and maximum acceleration when seismic motion is input are shown respectively. Note that for both the "with stopper" model and the "stopper rigid" model, the maximum deformation of the seismic isolation layer is set to 700 mm.

[0087] From FIGS. 10 and 11, in the "stopper rigid" model, a large acceleration is generated in the seismic isolation layer due to the collision of the seismic isolation layer, and the inter-story deformation angle and acceleration response above the seismic isolation layer increase. On the other hand, in the "with stopper" model, although the inter-story deformation angle and acceleration response above the seismic isolation layer increase slightly compared to the "no stopper" model, the increase amount is small compared to the "stopper rigid" model. Therefore, the collision load is reduced by the effects of the collision buffer rubber and the energy absorption member, and the effect as an effective seismic isolation fail-safe stopper is exerted.

[0088] In the movement restriction device 20 configured as described above, when a relative movement amount occurs between the upper structure 2 and the lower structure 3, the deformation member 24 joined by the second tie member 23 and the pin joint 25 rotates, and the deformation member 24 restricts the movement amount to be below the limit displacement of the seismic isolation layer 10, so it is possible to prevent the seismic isolation device from being damaged or broken due to excessive deformation and the upper structure 2 from colliding with a retaining wall or the like and damaging Building 1 or the retaining wall.

[0089] Also, a plurality of rib plates 246 are fixed to the deformation member 24 at intervals in the X direction. Therefore, local deformation of the long member 241 can be suppressed.

[0090] In addition, if a rib plate 246 is provided between the flanges 242 of the H-shaped steel, a deformation member 24 can be formed, so that the deformation member 24 can be easily manufactured.

[0091] In addition, when residual deformation occurs in the deformation member 24 after it has functioned as a seismic isolation fail-safe stopper, the deformation member 24 can be replaced.

[0092] In addition, when the deformation member 24 bends and undergoes plastic deformation, it can absorb the kinetic energy when a relative movement amount occurs between the deformation member 24 and the lower structure 3.

[0093] In addition, by joining the end of the deformation member 24 to the second tie member 23 with a simple pin joint 25, a large rotational deformation ability can be ensured at low cost without using a clevis or a pin.

[0094] In addition, it is possible to prevent an increase in the interlayer deformation response and the acceleration response above the seismic isolation layer 10 compared to the case where the stopper is a rigid body (assuming a collision with a retaining wall).

[0095] Note that the assembly procedures shown in the above-described embodiments, or the various shapes and combinations of the respective constituent members, are examples, and various modifications can be made based on design requirements and the like without departing from the gist of the present invention.

Explanation of Reference Numerals

[0097] 2 Upper structure 3 Lower structure 10 Seismic isolation layer 20 Movement restricting device 21 First tie member 22 Buffer member 23 Second tie member 24 Deformation member 25 Pin joint 241 Long member 242 Flange 243 Web 243a Long hole 246 Rib plate 251 Upper splice plate (splice plate) 252 Lower splice plate (splice plate) 253 Bolt 254 Nut

Claims

1. A movement restricting device installed in a seismic isolation layer between an upper structure and a lower structure disposed below the upper structure, a first tie member provided at the lower part of the upper structure and moving in conjunction with the upper structure, a pair of second tie members provided at the upper part of the lower structure, moving in conjunction with the lower structure, and arranged opposite to each other with a space therebetween, a deformation member, a buffer member fixed to the surface of the first tie member facing the deformation member side, and a pin joint portion joining the second tie member and the deformation member, and comprising: when the relative movement amount of the upper structure with respect to the lower structure reaches a predetermined amount or more, the deformation member is pressed against the first tie member via the buffer member and deformed to absorb kinetic energy, and the movement amount is restricted to within the limit displacement of the seismic isolation layer, the pin joint portion, a splice plate fixed to the second tie member and having bolt holes formed therein, a long hole formed in the deformation member and long in the facing direction in which the pair of second tie members face each other, and a bolt inserted through the bolt hole and the long hole and having a nut fastened thereto. A movement restricting device.

2. The deformation member, a long member extending in the facing direction and having both ends joined to the second tie member, and a plurality of rib plates fixed to the long member with a space therebetween in the facing direction. The movement restricting device according to claim 1.

3. The long member is an H-shaped steel with the web plate surface arranged in the vertical direction, and the rib plates are arranged with the plate surfaces facing in the facing direction. The movement restricting device according to claim 2.

4. The deformation member is replaceable. The movement restricting device according to any one of claims 1 to 3.

5. The deformation member plastically deforms to absorb the kinetic energy. The movement restricting device according to any one of claims 1 to 4.

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