Wind resistant device

Abstract

To provide a wind resistant device capable of handling large wind loads and achieving miniaturization of the device.SOLUTION: A wind resistant device comprises an oil damper 2 that is provided between an upper structure 14 and a lower structure 13 which are horizontally movable and damps relative movement of the upper structure 14 and the lower structure 13, a hydraulic motor 3 that converts flow of working oil 24 of the oil damper 2 to rotation movement, a rotation weight 4 that is connected to a rotation shaft 31 of the hydraulic motor 3, and a braking device 5 that restricts the rotation of the rotation weight 4, and the braking device 5 has a rotation unit 51 that is attached to the rotation weight 4 and rotates together with the rotation weight 4, a rotation restriction unit 52 that restricts the rotation of the rotation unit 51 by friction force with the rotation unit 51, and a control unit 53 that controls the rotation restriction unit 52.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a wind resistant device. [Background technology]

[0002] In recent years, buildings have tended to become more complex and larger due to redevelopment, and this trend is expected to continue in the future. Large-scale complex buildings require high disaster prevention capabilities, and the structures are required to have high standards in both earthquake-resistance and wind-resistance design. The adoption of a seismic isolation structure is considered as a means of improving the earthquake resistance grade. In the past, in the case of super-high rise buildings, the wind-receiving surface area is large and the wind load is large, so adopting a seismic isolation structure with low horizontal rigidity is disadvantageous in terms of wind-resistant design, and so the adoption of a seismic isolation structure was rare. However, in recent years, due to the experience of earthquake damage, there has been a strong need for seismic isolation structures, and as a countermeasure against wind in super-high rise seismic isolated buildings, the rigidity and damping amount of the seismic isolation layer have been increased, and in the event of a storm, wind-resistant shear pins such as metal pins are inserted to physically fix the displacement of the seismic isolation layer (for example, see Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2016-84624 A Summary of the Invention [Problem to be solved by the invention]

[0004] The wind loads that super-high-rise buildings are subjected to are expected to be very large and repeated for long periods of time. For this reason, if wind-resistant devices alone were to be used to handle the wind loads, the devices would have to be very large. This has an impact on the buildings in which the wind-resistant devices are installed, such as the need to secure space for installing the devices and the need to enlarge the components that support the devices.

[0005] Therefore, an object of the present invention is to provide a wind-resistant device that can withstand large wind loads while being compact in size. [Means for solving the problem]

[0006] In order to achieve the above-mentioned object, the wind-resistant device of the present invention comprises an oil damper that is provided between an upper structure and a lower structure that are capable of relative movement in the horizontal direction and that damps the relative movement between the upper structure and the lower structure, a hydraulic motor that converts the flow of hydraulic oil in the oil damper into rotational motion, a rotor connected to the rotating shaft of the hydraulic motor, and a braking device that regulates the rotation of the rotor, wherein the braking device comprises a rotating part that is attached to the rotor and rotates together with the rotor, a rotation regulating part that regulates the rotation of the rotating part by frictional force between the rotating part and the rotating part, and a control part that controls the rotation regulating part.

[0007] In the present invention, the hydraulic oil in the oil damper flows due to the horizontal relative movement between the upper structure and the lower structure, and the flow of the hydraulic oil causes the rotary weight connected to the rotary shaft of the hydraulic motor to rotate. That is, the wind-resistant device can be constructed with a mechanism in which the rotary weight is amplified and rotates when the horizontal relative movement between the upper structure and the lower structure occurs. By controlling the rotation restriction part with the control part and restricting the rotation of the rotating part, the rotation of the rotary weight is restricted and the flow of the hydraulic oil is also restricted, so that the oil damper can exert a large reaction force and restrict the horizontal relative movement between the upper structure and the lower structure. That is, even if the friction force between the rotating part and the rotation restriction part is small, a large reaction force can be obtained and a large wind load can be handled. Since there is no need to make the braking device a large structure, the wind-resistant device can be made smaller. The braking device is a so-called friction brake that regulates the rotation of the rotating part by the frictional force between the rotating part and the rotation regulating part. Therefore, even if the rotation regulating part is operating and regulating the rotation of the rotating part, if the wind load acting on the upper structure is large and the load is overloaded, the rotation of the rotating part is allowed while the rotating part is regulated (with the friction brake in effect), the rotor also rotates, and the relative movement between the upper structure and the lower structure is permitted. As a result, in the case of overload, the wind-resistant device can release the wind load, and the upper structure and the lower structure move relative to each other. Therefore, if a seismic isolation device or a damper is provided in addition to the wind-resistant device in the building, the seismic isolation device or the damper can bear the wind load. In other words, a configuration can be constructed in which the wind-resistant device and the seismic isolation device or the damper share the wind load. This allows the wind-resistant device to be made smaller in size.

[0008] The wind-resistant device according to the present invention may further include a rotation operation unit that is connected to a rotating shaft of the hydraulic motor and enables an operator to rotate the rotating shaft of the hydraulic motor.

[0009] With this configuration, an operator can use the rotary operating unit to rotate the rotary shaft of the hydraulic motor to operate the flow of hydraulic oil in the oil damper, and the oil damper can be used as a jack to move the upper structure and the lower structure relative to each other. For example, if residual displacement occurs between the upper structure and the lower structure after an earthquake or typhoon, the operator can use the rotary operating unit to rotate the rotary shaft of the hydraulic motor to move the upper structure and the lower structure relative to each other, and the upper structure and the lower structure can be easily restored to their initial positions.

[0010] In the wind-resistant device according to the present invention, the braking device may be a disk brake in which the rotating portion is disk-shaped and the rotation restricting portion restricts rotation of the rotating portion by clamping the rotating portion.

[0011] With this configuration, the braking device can exhibit stable braking performance.

[0012] In the wind-resistant device of the present invention, the control unit may be configured to drive the rotation regulating unit to regulate the rotation of the rotating unit when the wind load received by the upper structure and the lower structure exceeds a predetermined value.

[0013] With this configuration, the oil damper can be regulated as necessary during strong winds, etc., to restrict the relative movement between the upper structure and the lower structure. Effect of the Invention

[0014] According to the present invention, it is possible to cope with a large wind load and to reduce the size of the device. [Brief description of the drawings]

[0015] [Figure 1] FIG. 2 is a front view of a seismic isolation layer of a building provided with a wind-resistant device according to an embodiment. [Diagram 2] FIG. 2 is a front view of a wind resistant device according to an embodiment. [Diagram 3] FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] Hereinafter, a wind-resistant device according to an embodiment of the present invention will be described with reference to Figs. 1 to 3. As shown in FIG. 1, the wind-resistant device 1 according to this embodiment is installed in a seismic isolation layer 11 of a high-rise or super-high-rise building 12 in which a seismic isolation layer 11 is provided in the middle layer. A seismic isolation device 15 separate from the wind-resistant device 1, a damper (not shown), and the like are installed in the seismic isolation layer 11. The part of the building below the seismic isolation layer 11 is referred to as the lower structure 13, and the part above the seismic isolation layer 11 is referred to as the upper structure 14. The seismic isolation layer 11 connects the lower structure 13 and the upper structure 14 to allow relative displacement in the horizontal direction. The seismic isolation device 15 is a seismic isolation bearing such as a laminated rubber bearing or a sliding bearing. The wind-resistant device 1 is installed to regulate the relative displacement between the lower structure 13 and the upper structure 14 during a storm.

[0017] As shown in FIG. 2, the wind-resistant device 1 has an oil damper 2, a hydraulic motor 3, a rotary weight 4, a braking device 5, and a rotation operation unit 6. The oil damper 2 is provided between the lower structure 13 and the upper structure 14, and damps the relative movement between the lower structure 13 and the upper structure 14. The hydraulic motor 3 converts the flow of hydraulic oil 24 in the oil damper 2 into rotational motion. The rotary weight 4 is connected to a rotating shaft 31 of the hydraulic motor 3. The braking device 5 regulates the rotation of the rotary weight 4. The rotation operation unit 6 is attached to the rotary weight 4, and can be gripped by an operator to rotate the rotary weight 4.

[0018] The oil damper 2 has a cylinder 21, a piston rod 22, a piston 23, and hydraulic oil 24. The piston rod 22 is inserted into the cylinder 21 so as to be able to move back and forth. In explaining the oil damper 2, the direction in which the cylinder 21 and the piston rod 22 extend is referred to as the axial direction (the direction of arrow A in FIG. 2). The oil damper 2 is installed so that the axial direction is horizontal.

[0019] One end of the cylinder 21 is connected to the upper structure 14 (one structure) via a clevis 211. The axis of the clevis 211 extends in the vertical direction. The cylinder 21 is rotatable around the axis of the clevis 211. Hydraulic oil 24 is sealed in the cylinder 21. One end of the piston rod 22 is connected to the lower structure 13 (the other structure) via a clevis 221. The axis of the clevis 221 extends in the vertical direction. The piston rod 22 is rotatable around the axis of the clevis 221. The other end of the piston rod 22 is inserted into the cylinder 21 so as to be able to move forward and backward. The piston 23 is connected to a middle portion of the piston rod 22 in the axial direction, and divides the interior of the cylinder 21 into two oil chambers 25, 26. Of the two oil chambers 25, 26, the oil chamber on one side in the axial direction is referred to as the first oil chamber 25, and the oil chamber on the other side in the axial direction is referred to as the second oil chamber 26. In this embodiment, the piston 23 is formed with a communication passage 231 that penetrates in the axial direction and communicates between the first oil chamber 25 and the second oil chamber 26. A relief valve 232 is provided in the middle of the communication passage 231 in the axial direction. By providing the relief valve 232 in the piston 23, it is possible to suppress the occurrence of an excessive load force on the oil damper 2.

[0020] The hydraulic motor 3 is connected to the two oil chambers 25, 26 via connecting pipes 27, 28. The connecting pipe connecting the hydraulic motor 3 and the first oil chamber 25 is referred to as a first connecting pipe 27, and the connecting pipe connecting the hydraulic motor 3 and the second oil chamber 26 is referred to as a second connecting pipe 28. The hydraulic oil 24 flows through the first connecting pipe 27 and the second connecting pipe 28. The first connecting pipe 27 and the second connecting pipe 28 are provided with damping valves 271, 281, respectively. The hydraulic motor 3 has a rotating shaft 31 that rotates due to the flow of the hydraulic oil 24. In this embodiment, a rotation axis 31a of the rotating shaft 31 extends in the vertical direction. In the hydraulic motor 3, the rotary shaft 31 rotates due to the hydraulic pressure of the hydraulic oil 24 pushed out from either the first oil chamber 25 or the second oil chamber 26 by the forward and backward movement of the piston rod 22 caused by the relative movement between the lower structure 13 and the upper structure 14. At this time, the hydraulic oil 24 flowing through the connecting pipes 27, 28 is configured to generate viscous resistance due to the damping valves 271, 281.

[0021] The rotary weight 4 has a substantially disk shape. The rotary weight 4 is provided coaxially with and integrally with the rotary shaft 31 of the hydraulic motor 3. The rotary weight 4 is rotatable together with the rotary shaft 31 around a rotation axis 31a of the rotary shaft 31.

[0022] In the oil damper 2, when the lower structure 13 and the upper structure 14 move relative to each other in the horizontal direction, the piston rod 22 fixed to the lower structure 13 moves linearly in the axial direction (horizontal direction) relative to the cylinder 21 fixed to the upper structure 14. Hydraulic oil 24 corresponding to the volume of the oil chambers 25, 26 which changes with the movement of the piston 23 flows to the hydraulic motor 3, rotating the rotating shaft 31 of the hydraulic motor 3, and rotating weight 4 together with the rotating shaft 31. The rotation of the rotating weight 4 imparts inertial mass. The oil damper 2, hydraulic motor 3 and rotating weight 4 constitute a rotational inertial mass damper.

[0023] As shown in FIG. 2 and FIG. 3, the braking device 5 has a rotating unit 51, a rotation restricting unit 52, and a control unit 53. The rotating unit 51 is attached to the rotating weight 4 and rotates together with the rotating weight 4. The rotating unit 51, the rotating weight 4, and the rotating shaft 31 of the hydraulic motor 3 are arranged coaxially and rotate integrally. The rotation restricting unit 52 restricts the rotation of the rotating unit 51 by a frictional force between the rotating unit 51 and the rotating weight 4. The rotation restricting unit 52 is fixed to the oil damper 2. The control unit 53 controls the drive of the rotation restricting unit 52. The control unit 53 may be set to receive information on the wind load received by the building 12 and automatically control the drive of the rotation restricting unit 52 based on the information. The control unit 53 may be set to control the drive of the rotation restricting unit 52 in response to an operation of an administrator based on the information on the wind load received by the building 12. In either case, for example, the control unit 53 performs control to drive the rotation restriction unit 52 to restrict the rotation of the rotation unit 51 when the wind load received by the building 12 exceeds a predetermined value.

[0024] The braking device 5 of this embodiment is a disc brake. The rotating part 51 is disk-shaped and is attached to the outer periphery of the rotating weight 4. The plate surface of the rotating part 51 faces the vertical direction. The rotation restricting part 52 restricts the rotation of the rotating part 51 by sandwiching the rotating part 51 from above and below.

[0025] Even when the rotation restricting unit 52 is operating and restricting the rotation of the rotating part 51, if the wind load acting on the upper structure 14 is large and the load is overloaded, the braking device 5 allows the rotation of the rotating part 52 while restricting the rotation of the rotating part 51 (with the rotation restricting unit 52 pinching the rotating part 51), and the rotating weight 4 also rotates. In other words, in the case of an overload, the wind-resistant device 1 can release the wind load. Regarding the restriction of the rotation of the rotating part 51 by the rotation restricting unit 52, if the wind load acting on the upper structure 14 is small and the load on the braking device 5 is small, the rotation restricting unit 52 restricts the rotation of the rotating part 51, and if the wind load acting on the upper structure 14 is large and the load on the braking device 5 is large, the rotation restricting unit 52 pinches the rotating part 51 but allows the rotating part 51 to rotate.

[0026] The rotation operation unit 6 has an attachment part 61 that is detachably attached to the rotary spindle 4, a shaft part 62 that is fixed to the attachment part 61 and arranged coaxially with the rotary spindle 4 when the attachment part 61 is attached to the rotary spindle 4, and a grip part 63 that is connected to the shaft part 62 and can be gripped by an operator to rotate the shaft part 62. The attachment part 61 is fixed to the rotary spindle 4, for example, by fitting it into the rotary spindle 4. When an operator grips the grip part 63 and rotates the shaft part 62 around the axis of the rotary spindle 4, the attachment part 61 and the rotary spindle 4 rotate around the axis. This rotates the rotary shaft 31 of the hydraulic motor 3. The rotation operation unit 6 is connected to the rotary shaft 31 of the hydraulic motor 3 via the rotary spindle 4.

[0027] When an operator operates the rotation operation unit 6 to rotate the rotary weight 4, the rotary shaft 31 of the hydraulic motor 3 rotates, and the flow of the hydraulic oil 24 can be controlled. As a result, the flow of the hydraulic oil 24 in the oil damper 2 can be controlled, and the oil damper 2 can be used as a jack for moving the lower structure 13 and the upper structure 14 relative to each other.

[0028] In the wind-resistant device 1 according to this embodiment, the hydraulic oil 24 in the oil damper 2 flows due to the horizontal relative movement between the lower structure 13 and the upper structure 14, and the flow of the hydraulic oil 24 rotates the rotary weight 4 connected to the rotary shaft of the hydraulic motor. That is, the wind-resistant device 1 can construct a mechanism in which the rotary weight 4 is amplified and rotates when the horizontal relative movement between the lower structure 13 and the upper structure 14 occurs. By controlling the rotation restriction unit 52 with the control unit 53 and restricting the rotation of the rotating unit 51, the rotation of the rotary weight 4 is restricted and the flow of the hydraulic oil 24 is also restricted, so that the oil damper 2 can exert a large reaction force and restrict the horizontal relative movement between the lower structure 13 and the upper structure 14. That is, even if the friction force between the rotating unit 51 and the rotation restriction unit 52 is small, a large reaction force can be obtained and a large wind load can be handled. Since there is no need to make the braking device 5 a large-scale structure, the wind-resistant device 1 can be made smaller. By controlling the braking device 5, the damping force of the oil damper 2 can be semi-actively controlled.

[0029] The braking device 5 is a so-called friction brake that restricts the rotation of the rotating part 51 by the frictional force between the rotating part 51 and the rotation restricting part 52. Therefore, when the wind load acting on the upper structure 14 is large and the load is excessive, the rotation of the rotating part 51 is permitted while the rotating part 51 is restricted (with the friction brake in operation), the rotating weight 4 also rotates, and the relative movement between the lower structure 13 and the upper structure 14 is permitted. As a result, in the case of an overload, the wind-resistant device 1 can release the wind load, and the lower structure 13 and the upper structure 14 move relative to each other. Therefore, when a seismic isolation device, a damper, or the like is provided in addition to the wind-resistant device 1 in the building, the seismic isolation device, the damper, or the like can bear the wind load. In other words, a configuration can be constructed in which the wind-resistant device 1 and the seismic isolation device, the damper, or the like share the wind load. This allows the wind-resistant device 1 to be made smaller in size.

[0030] The wind-resistant device 1 is provided with a rotation operation unit 6 that is attached to the rotating weight 4 and enables an operator to rotate the rotating weight 4. With this configuration, an operator can rotate the rotating weight 4 with the rotation operation unit 6 to control the flow of the hydraulic oil 24 in the oil damper 2, and therefore the oil damper 2 can be used as a jack to move the lower structure 13 and the upper structure 14 relative to each other. For example, if residual displacement occurs between the lower structure 13 and the upper structure 14 after an earthquake or typhoon, the lower structure 13 and the upper structure 14 can be easily restored to their initial positions by rotating the rotating weight 4 with the rotation operation unit 6 to move the lower structure 13 and the upper structure 14 relative to each other.

[0031] The braking device 5 is a disc brake in which the rotating part 51 is disk-shaped and the rotation restricting part 52 restricts the rotation of the rotating part 51 by pinching the rotating part 51. With this configuration, the braking device 5 can exhibit stable braking performance.

[0032] When the wind load received by the building 12 exceeds a predetermined value, the control unit 53 drives the rotation restriction unit 52 to control the restriction of the rotation of the rotation unit 51. With this configuration, the oil damper 2 can be restricted as necessary during a strong wind or the like, and the relative movement between the upper structure 14 and the lower structure 13 can be restricted.

[0033] Although an embodiment of the wind-resistant device according to the present invention has been described above, the present invention is not limited to the above embodiment and can be modified as appropriate without departing from the spirit of the present invention. For example, in the above embodiment, the wind-resistant device 1 is provided with a rotation operating unit 6 that an operator can operate to rotate the rotating shaft 31 of the hydraulic motor 3, but the wind-resistant device 1 does not necessarily have to be provided with a rotation operating unit 6. In the above embodiment, the rotation operating unit 6 is connected to the rotating shaft 31 of the hydraulic motor 3 via the rotary spindle 4, but it may be directly connected to the rotating shaft 31 of the hydraulic motor 3, or it may be connected to the rotating unit 51 and connected to the rotating shaft 31 of the hydraulic motor 3 via the rotary spindle 4 and the braking device 5.

[0034] In the above embodiment, the braking device 5 is a disc brake, but it may also be a drum brake in which the rotating portion 51 is cylindrical and the rotation regulating portion 52 is pressed against the inner surface of the rotating portion 51 to regulate the rotation of the rotating portion 51.

[0035] In the above embodiment, the control unit 53 is configured to drive the rotation control unit 52 to control the rotation of the rotating unit 51 when the wind load received by the building 12 exceeds a predetermined value, but the control unit 53 may also be configured to drive the rotation control unit 52 to control the rotation of the rotating unit 51 based on wind load observed in the vicinity of the building 12, a forecast of a storm, etc.

[0036] In the above embodiment, the wind-resistant device 1 is installed in the seismic isolation layer 11 of a high-rise or ultra-high-rise building 12 having a seismic isolation layer 11 in the middle layer, but it may also be installed in the seismic isolation layer of a building with base isolation in which a seismic isolation layer is provided between the ground and the foundation. [Explanation of symbols]

[0037] 1 Wind-resistant device 3 Hydraulic motor 4 Oscillating weight 5 Braking device 6 Rotation control section 13 Undercarriage 14 Superstructure 51 Rotating part 52 Rotation restriction part 53 Control section 61 Mounting part 62 Shaft 63 Gripping part

Claims

1. an oil damper provided between an upper structure and a lower structure that are relatively movable in a horizontal direction and that damps the relative movement between the upper structure and the lower structure; A hydraulic motor that converts the flow of hydraulic oil in the oil damper into rotational motion; a rotary weight connected to a rotary shaft of the hydraulic motor; a braking device that restricts rotation of the rotary spindle, The braking device comprises: a rotating portion attached to the rotary spindle and rotating together with the rotary spindle; a rotation restricting portion that restricts rotation of the rotating portion by a frictional force between the rotating portion and the rotation restricting portion; A wind-resistant device having a control unit that controls the rotation regulating unit.

2. 2. The wind-resistant device according to claim 1, further comprising a rotation operation unit connected to a rotary shaft of the hydraulic motor, the rotation operation unit enabling an operator to rotate the rotary shaft of the hydraulic motor.

3. 3. The wind-resistant device according to claim 1, wherein the braking device is a disk brake in which the rotating portion is disk-shaped and the rotation restricting portion restricts rotation of the rotating portion by clamping the rotating portion.

4. 3. The wind-resistant device according to claim 1 or 2, wherein the control unit performs control to drive the rotation restricting unit to restrict rotation of the rotating unit when a wind load received by the upper structure and the lower structure exceeds a predetermined value.

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