JP7025988B2 - Building damping system and building - Google Patents

Description

The present invention relates to a building vibration damping system and a building equipped with the same.

Conventionally, in multi-story buildings such as condominiums and office buildings, it has been proposed to install a tuned mass damper (hereinafter referred to as "TMD") on the roof of the building to reduce the shaking of the building due to an earthquake or wind. ..

For example, in Patent Document 1, a multi-stage TMD having a moving frame and a vibrating body, which are coaxially interpolated inside a fixed frame having a large diameter cylinder and suspended via a suspending material, is proposed. ing.

However, since TMDs that respond to earthquakes are large, buildings that can be installed in a limited area on the rooftop floor are rare, and ordinary TMDs cannot respond to earthquakes. Such a TMD is used exclusively for improving the habitability in a strong wind, and it is general that the weight of the TMD is fixed and does not exert a vibration damping effect in the event of an earthquake.

Japanese Unexamined Patent Publication No. 7-34720

Therefore, an object of the present invention is to provide a vibration control system for a building that is small in size and capable of responding to wind and earthquake, and a building equipped with the vibration control system.

The present invention has been made to solve at least a part of the above-mentioned problems, and can be realized as the following aspects or application examples.

[1] One aspect of the building vibration damping system according to the present invention is
A fixed support fixed to the building and
A movable support supported by the fixed support via the first spring element, and
A weight supported by the movable support via a second spring element,
An actuator connected to the fixed support and the movable support,
A control device that operates the actuator and
Including
The control device operates the actuator based on the acquired seismic information to limit the vibration of the first spring element and set the vibration cycle of the weight to any one of the secondary or higher natural cycles of the building. It is characterized by matching with one.

According to one aspect of the vibration control system of the building, in the event of an earthquake, the vibration cycle of the weight is adjusted to any one of the secondary or higher natural cycles of the building to suppress the increase in size of the system and to cause an earthquake. It can also exert a vibration damping function at times.

[2] In one aspect of the vibration control system of the building,
The actuator is a damping means for damping the vibration of the movable support with respect to the fixed support.
The control device outputs a command to increase or decrease the damping force of the actuator, and the vibration of the first spring element can be limited by increasing the damping force of the actuator.

According to one aspect of the vibration damping system of the building, by using the actuator as a damping means, the vibration between the fixed support and the movable support is damped, and the damping force of the actuator is increased. The vibration of the spring element can be limited.

[3] In one aspect of the vibration damping system of the building.
The actuator is an oil damper provided with a normally closed relief valve.
The control device can open the relief valve in a strong wind and keep the relief valve closed in the event of an earthquake.

According to one aspect of the vibration control system of the building, by using an oil damper provided with a normally closed relief valve as the actuator, it is possible to cope with shaking during strong winds and earthquakes only by opening and closing the relief valve. ..

[4] In one aspect of the vibration damping system of the building,
The first spring element is a plurality of first suspending materials for suspending the movable support from the fixed support.
The second spring element can be a plurality of second suspension members that suspend the weight from the movable support.

According to one aspect of the vibration damping system of the building, by using the first spring element and the second spring element as the first suspension material and the second suspension material, the configuration can be simplified and the price can be reduced. ..

[5] In one aspect of the vibration damping system of the building,
The actuator is the first actuator.
A second actuator connected to the movable support and the weight is further included.
The second actuator can be a rotary inertia mass damper.

According to one aspect of the vibration damping system of the building, by using the second actuator as a rotary inertial mass damper, it is possible to cope with the shaking of an earthquake without increasing the size of the weight.

[6] In one aspect of the vibration damping system of the building.
Further equipped with an accelerometer installed in the building
The control device determines whether or not the acceleration data acquired from the acceleration sensor exceeds the first threshold value and the second threshold value, and determines whether or not the acceleration data has exceeded the first threshold value and the second threshold value.
The control device is
When it is determined that the acceleration data exceeds the first threshold value, the actuator is operated so as to match the vibration cycle of the weight with the primary natural cycle of the building.
When it is determined that the acceleration data exceeds the second threshold value, the actuator can be operated so as to match the vibration cycle of the weight with any one of the secondary or higher natural cycles of the building.

According to one aspect of the vibration damping system of the building, it is possible to switch between the primary natural period and the secondary or higher natural period based on the acceleration data of the acceleration sensor installed in the building.

[7] One aspect of the building according to the present invention is characterized in that one aspect of the vibration damping system of the building is provided on the rooftop or the middle floor.

According to one aspect of the building, it is possible to provide a vibration control system for the building, which is small in size and can cope with wind and earthquake.

According to the present invention, it is possible to provide a vibration control system for a building that is small in size and capable of responding to wind and earthquake, and a building equipped with the vibration control system.

It is a schematic diagram of the building which concerns on this embodiment. It is a vertical sectional view of the vibration damping system of the building which concerns on this embodiment. It is a cross-sectional view of AA of the vibration damping system of the building which concerns on this embodiment. It is sectional drawing of the 1st actuator. It is a flowchart which shows the processing procedure of the vibration damping system of a building which concerns on this embodiment.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. The embodiments described below do not unreasonably limit the content of the present invention described in the claims. Moreover, not all of the configurations described below are essential constituent requirements of the present invention.

A building vibration damping system according to an embodiment of the present invention includes a fixed support fixed to the building, a movable support supported by the fixed support via a first spring element, and the movable support. The control device includes a weight supported via the second spring element, an actuator connected to the fixed support and the movable support, and a control device for operating the actuator, and the control device is based on the input of seismic information. The actuator is operated to limit the vibration of the first spring element so that the vibration cycle of the weight is adjusted to any one of the secondary or higher natural cycles of the building.

1. 1. Building The building 1 according to the present embodiment will be described with reference to FIG. FIG. 1 is a schematic view of a building 1 according to the present embodiment.

As shown in FIG. 1, in a building 1, a building damping system 10 (hereinafter referred to as “system 10”) is provided on any layer of the building 1, for example, a rooftop RF or an intermediate floor. Placing the system 10 on the roof RF is most effective in damping.

Building 1 is a multi-layered building such as a condominium or an office building, and is a so-called high-rise building. In the building 1, a system 10 having a vibration damping structure is provided on the roof RF in order to reduce shaking due to wind or an earthquake. The system 10 may be installed at a place other than the rooftop RF. When the system 10 is installed on the middle floor, it can be installed in an area other than the living room, for example, a machine room. The building 1 may be provided with a seismic isolation mechanism 2 underground in order to cope with the shaking of an earthquake.

It is desirable that the installation area of the system 10 is smaller because various devices are arranged on the roof RF of the building 1 and the place where the system 10 can be installed is limited on the middle floor. As will be described later, since the system 10 is small and can cope with wind and earthquake, the degree of freedom in designing the system installation floor in the building 1 is improved by adopting the system 10.

As the seismic isolation mechanism 2, known laminated rubber bearings, elastic sliding bearings, rolling bearings, oil dampers and the like can be adopted. The seismic isolation mechanism 2 does not exert a large response control effect on the shaking of the building 1 due to the wind, but acts on the shaking of the building 1 due to the earthquake. Since the building 1 is provided with the seismic isolation mechanism 2 and the primary natural period of the building 1 changes according to the earthquake level, it is particularly difficult to adjust the TMD to the primary natural period.

2. 2. Vibration control system for buildings The system 10 according to this embodiment will be described with reference to FIGS. 2 and 3. 2 is a vertical cross-sectional view of the system 10 according to the present embodiment, FIG. 3 is a cross-sectional view taken along the line AA in FIG. 2 of the system 10 according to the present embodiment, and FIG. 4 is a cross-sectional view taken along the line of the first actuator 24. be.

As shown in FIGS. 2 and 3, the system 10 has a fixed support 20 fixed to the building 1 and a movable support supported by the fixed support 20 via a first suspension member 22 as a first spring element. A body 30, a weight 40 supported by the movable support 30 via a second suspension member 32 as a second spring element, a first actuator 24 connected to the fixed support 20 and the movable support 30, and a first actuator 24. 1 Includes a control device 50 for operating an actuator.

The system 10 is a so-called TMD (Tured Mass Damper). The system 10 attaches a mass (additional weight) to the building 1 whose vibration is to be controlled via a damper and a spring to adjust the natural frequency (Tuned), so that the vibration of the wind or earthquake received by the building 1 is shaken by the mass. It is a device that suppresses the vibration of the building 1 by absorbing it with.

The fixed support 20 is fixed to a place where the system 10 is installed in any layer of the building 1, for example, a rooftop RF. The fixed support 20 supports the movable support 30 inside the fixed support 20. The fixed support 20 has a strength to support the movable support 30 and the weight 40 supported by the movable support 30. The fixed support 20 constitutes the outermost side of the housing of the system 10 and is arranged so as to surround the movable support 30. The fixed support 20 is, for example, four pillars erected on the roof RF so as to form the vertices of the plane-viewing quadrangle, and a lower frame that connects the pillars below the pillars to form the plane-viewing quadrangle. And an upper frame that connects the pillars to each other at the upper end of the pillars to form a quadrangle in a plan view.

The first spring element is a plurality of first suspension members 22 that suspend the movable support 30 from the fixed support 20. By using the first hanging material 22, the configuration becomes simple and the price can be reduced. The first suspending member 22 hangs from the upper frame of the fixed support 20, and the movable support 30 is suspended and held at the lower end thereof. The first suspension member 22 functions as a first spring element that exerts a horizontal restoring force of the weight 40 and the movable support 30. The first suspending member 22 is, for example, four, and is formed of a wire having a length L2 between the fixed support 20 and the movable support 30.

The movable support 30 is supported by the fixed support 20 via a first suspension member 22 as a first spring element. The movable support 30 is arranged inside the fixed support 20, and the movable support 30 is arranged inside the movable support 30 so as to surround the weight 40. The movable support 30 includes a lower frame of a quadrangular view fixed to the lower end of the first suspending member 22 extending downward from the upper frame of the fixed support 20, and four pillars extending upward from the lower frame. Includes an upper frame of a plan-viewing quadrangle that connects the pillars.

The second spring element is a plurality of second suspending members 32 that suspend the weight 40 from the movable support 30. By using the second hanging material 32, the configuration becomes simple and the price can be reduced. The second suspending member 32 hangs from the upper frame of the movable support 30, and the weight 40 is suspended and held at the lower end thereof. The second suspending member 32 functions as a second spring element that exerts a horizontal restoring force of the weight 40. The second suspending member 32 passes through the inside of the weight 40 from the upper surface of the weight 40 and is fixed at the lower end of the weight 40. The second suspending member 32 is configured as a length L2 pendulum from the lower surface of the upper frame of the movable support 30 to the upper end of the weight 40, and the weight 40 can be swayed like a pendulum having a length L2. A pendulum of length L1 + length L2 synchronizes with the primary natural period of building 1, and a pendulum of length L2 synchronizes with any one of the secondary or higher natural periods of building 1, for example, the secondary natural period. do. Since the second-order natural period is the longest among the second-order and higher-order natural periods, it is preferable to match it with the second-order natural period from the viewpoint of damping effect. The second suspending member 32 is, for example, four, and is formed of a wire having a length from the movable support 30 to the lower end of the weight 40. In the present embodiment, the first spring element and the second spring element use a suspending material, but the present invention is not limited to this, and for example, other known spring elements used for TMD may be adopted, for example, an end. A steel column or the like whose portion is supported by a pin may be used. As the first suspension material 22 and the second suspension material 32, wires are used, but other known suspension materials used for TMD may be used, for example, steel columns or the like.

The weight 40 is supported by the movable support 30 via a second suspending member 32 as a second spring element. The weight 40 is arranged inside the movable support 30. The weight 40 is fixed to the lower end of the second suspending member 32 extending downward from the upper frame of the movable support 30. The weight 40 can move horizontally like a pendulum.

As the fixed support 20, the first suspension 22, the movable support 30, the second suspension 32, and the weight 40, those adopted in known TMDs can be adopted, and for example, JP-A-7-34720 can be adopted. Anything as disclosed in the issue can be adopted.

Both ends of the first actuator 24 are connected to the fixed support 20 and the movable support 30. The first actuator 24 may be a damping means for damping the vibration of the movable support 30 with respect to the fixed support 20.

As shown in FIG. 4, the first actuator 24 can be an oil damper provided with a normally closed relief valve 26. The first actuator 24 includes a piston 25, an oil tank 27, a relief valve 26, and a constant orifice 28 inside the cylinder. The relief valve 26 is a solenoid valve. The oil tank 27 is an oil passage connecting the left and right oil chambers of the piston 25, and oil can be moved by a constant orifice. By opening and closing the relief valve 26, the amount of oil movement between the left and right oil chambers of the piston 25 can be adjusted, and as a result, the damping force as an oil damper can be adjusted. If the relief valve 26 is closed, the movement of oil in the first actuator 24 is restricted to generate a damping force, and in this embodiment, the damping force becomes infinite and the first actuator 24 does not expand and contract with the fixed support 20. The movable support 30 is fixed. As the first actuator 24 provided with the relief valve 26, a commercially available oil damper with a relief function can be adopted. If the damping force of the first actuator 24 can be controlled, another damping means such as an air damper may be used.

The system 10 may further include a second actuator 34 connected to the movable support 30 and the weight 40. The second actuator 34 may be a rotary inertia mass damper. The rotary inertia mass damper has a ball screw mechanism and an additional weight that is given rotation by a nut. By using the second actuator 34 as a rotary inertial mass damper having an additional weight, the system 10 can be made to cope with the shaking of an earthquake without increasing the size of the weight 40.

The control device 50 can operate the first actuator 24. The control device 50 includes, for example, an arithmetic unit such as a CPU (Central Processing Unit), a storage device such as a memory, an interface for inputting / outputting data and the like.

For example, the control device 50 operates the first actuator 24 based on the seismic information acquired from the outside to limit the vibration of the first suspension member 22 which is the first spring element, and set the vibration cycle of the weight 40 in the building 1. Match with any one of the secondary and higher natural cycles, for example, the secondary natural period. By matching the vibration cycle of the weight 40 to any one of the secondary or higher natural cycles of the building 1 in the event of an earthquake, it is possible to suppress the increase in size of the system 10 and to exert the vibration damping function even in the event of an earthquake. .. In general, the building 1 will shake greatly during an earthquake, but other external factors such as wind and vibration caused by nearby transportation will not cause as much shaking as an earthquake. In order for the TMD, which absorbs vibrations other than earthquakes, to absorb large vibrations during an earthquake, it is usually necessary to increase the mass and the spring element. Since the system 10 absorbs the vibration of any one of the secondary and higher natural cycles of the building 1 by the vibration of the second suspending material 32, the earthquake does not increase in size like the TMD adjusted to the primary natural cycle. It can absorb a part of the vibration of time. Further, in a state where the vibration of the first suspension material 22 is not restricted, the system 10 can absorb the vibration of the building 1 with a long cycle by the first suspension material 22 and the second suspension material 32, so that the vibration is caused by a factor such as wind. Can also be handled.

Further, when the building 1 is equipped with the seismic isolation mechanism 2, for example, the primary natural period of a certain building 1 has a different period of 3 to 7 seconds depending on the earthquake level, but the secondary of the building 1 is provided. The natural period is, for example, 1.2 seconds to 1.7 seconds depending on the seismic level, and is further shortened in the third or higher natural period. Therefore, if the period of the system 10 can be adjusted to any one of the secondary or higher natural periods of the building 1, the shaking of the building 1 can be efficiently suppressed at the time of an earthquake.

The control device 50 outputs a command to increase or decrease the damping force of the first actuator 24, and increases the damping force of the first actuator 24 to limit the vibration of the first suspension member 22 which is the first spring element. The vibration of the first suspension member 22 can be limited by increasing the damping force of the first actuator 24 according to the command of the control device 50. The vibration of the first suspension member 22 may be stopped by increasing the damping force of the first actuator 24. If the first suspension member 22 is fixed, the cycle of the weight 40 in the system 10 is only the vibration due to the second suspension member 32, and it is sure to be one of the secondary or higher natural cycles shorter than the primary natural cycle. Can be adapted to.

More specifically, the control system 10 keeps the relief valve 26 of the first actuator 24 open during a strong wind and the relief valve 26 closed during an earthquake. According to the system 10, it is possible to cope with shaking during strong winds and earthquakes only by opening and closing the relief valve 26. The relief valve 26 is a solenoid valve and can be opened and closed by receiving a signal from the control device 50. Not limited to the relief valve 26, other hydraulic valves can also be adopted.

As shown in FIG. 2, the system 10 may further include an accelerometer 60 installed in the building 1. The acceleration sensor 60 measures the acceleration of the building 1 when the building 1 receives vibration. The accelerometer 60 may be installed on the roof RF of the building 1. As the acceleration sensor 60, for example, a sensor using a MEMS (Micro Electro Electro Mechanical Systems) technology can be adopted.

The control device 50 determines whether or not the acceleration data acquired from the acceleration sensor 60 exceeds the first threshold value and the second threshold value. The first threshold value and the second threshold value are set in advance and stored in the storage unit of the control device 50. The first threshold value can correspond to, for example, the acceleration of the building 1 due to a strong wind having a predetermined wind speed, and the second threshold value can correspond to, for example, the acceleration of the building 1 due to a predetermined earthquake level.

When the control device 50 determines that the acceleration data exceeds the first threshold value, the control device 50 operates the first actuator 24 so as to match the vibration cycle of the weight 40 with the primary natural cycle of the building 1. When the control device 50 determines that the acceleration data exceeds the second threshold value, the control device 50 operates the first actuator 24 so as to match the vibration cycle of the weight 40 with any one of the secondary or higher natural cycles of the building 1. The system 10 can switch between a primary natural period and a secondary or higher natural period based on the acceleration data (data in line with reality) of the acceleration sensor 60 installed in the building 1. Even if the system 10 does not have the acceleration sensor 60, the control device 50 determines the vibration cycle of the weight 40 based on the seismic information and the wind speed information from the outside as the primary natural period of the building 1 and the natural period of the second or higher. You may switch to any one of the natural periods.

3. 3. Building Vibration Control Method The vibration control method of the building 1 by the system 10 according to the present embodiment will be described with reference to FIGS. 1 to 5. FIG. 5 is a flowchart showing a processing procedure of the system 10 according to the present embodiment.

As shown in FIG. 5, the system 10 performs the processes of S10 to S50.

S10: The control device 50 acquires acceleration data from the acceleration sensor 60 installed in the building 1.

S20: The control device 50 determines whether or not the acquired acceleration data exceeds the second threshold value. If the second threshold is exceeded (YES), S40 is executed. If it is equal to or less than the second threshold value (NO), the control device 50 executes S30.

S30: The control device 50 determines whether or not the acquired acceleration data exceeds the first threshold value. When the first threshold value is exceeded (YES), the control device 50 executes S50. If it is equal to or less than the first threshold value (NO), S40 is executed.

S40: The control device 50 outputs a signal for closing the relief valve 26. The relief valve 26 is kept closed by the signal from the control device 50, or the valve is closed if the valve is already open. When the relief valve 26 is closed, the movement of oil in the first actuator 24 is restricted, the damping force of the first actuator 24 is increased, and the relief valve 26 is locked, for example. When the first actuator 24 is locked, the movable support 30 cannot move in the horizontal direction with respect to the fixed support 20, so that the weight 40 vibrates in a cycle of the length L2 of the second suspension member 32. Since this cycle is synchronized with any one of the second or higher natural cycles of the building 1, the system 10 can attenuate the vibration of any one of the second or higher natural cycles of the building 1. By setting the second threshold value for the acceleration corresponding to a large shaking such as an earthquake, it is possible to attenuate the vibration of any one of the secondary and higher natural periods of the building 1.

S50: The control device 50 outputs a signal for opening the relief valve 26. When the relief valve 26 opens the valve by the signal from the control device 50, the damping force of the first actuator 24 becomes small, and the first suspension member 22 and the movable support 30 vibrate. Since the vibration of the weight 40 is synchronized with the primary natural period of the building 1 in the state where the relief valve 26 is open, the vibration of the building 1 can be damped by the system 10. By setting the first threshold value for the acceleration corresponding to a wind having a smaller sway than an earthquake, the sway of the building 1 can be attenuated according to the primary natural period of the building 1.

The present invention is not limited to the above-described embodiment, and various modifications are possible. For example, the present invention includes configurations that are substantially identical to the configurations described in the embodiments (eg, configurations with the same function, method, and result, or configurations with the same purpose and effect). The present invention also includes a configuration in which a non-essential part of the configuration described in the embodiment is replaced. Further, the present invention includes a configuration having the same action and effect as the configuration described in the embodiment or a configuration capable of achieving the same object. Further, the present invention includes a configuration in which a known technique is added to the configuration described in the embodiment.

1 ... building, 2 ... seismic isolation mechanism, 10 ... system, 20 ... fixed support, 22 ... first suspension material, 24 ... first actuator, 25 ... piston, 26 ... relief valve, 27 ... oil tank,
28 ... constant orifice, 30 ... movable support, 32 ... second suspension material, 34 ... second actuator, 40 ... weight, 50 ... control device, 60 ... acceleration sensor

Claims (7)

A fixed support fixed to the building and
A movable support supported by the fixed support via the first spring element, and
A weight supported by the movable support via a second spring element,
An actuator connected to the fixed support and the movable support,
A control device that operates the actuator and
Including
The control device operates the actuator based on the acquired seismic information to limit the vibration of the first spring element and set the vibration cycle of the weight to any one of the secondary or higher natural cycles of the building. A vibration control system for buildings, which is characterized by matching with each other. In the vibration damping system of the building according to claim 1,
The actuator is a damping means for damping the vibration of the movable support with respect to the fixed support.
A building vibration damping system, wherein the control device outputs a command to increase or decrease the damping force of the actuator, and limits the vibration of the first spring element by increasing the damping force of the actuator. In the building vibration damping system according to claim 1 or 2.
The actuator is an oil damper provided with a normally closed relief valve.
The control device is a vibration control system for a building, characterized in that the relief valve is opened in a strong wind and the relief valve is maintained in a closed state in the event of an earthquake. In the building vibration damping system according to any one of claims 1 to 3.
The first spring element is a plurality of first suspending materials for suspending the movable support from the fixed support.
The second spring element is a vibration damping system for a building, characterized in that the second spring element is a plurality of second suspending materials for suspending the weight from the movable support. In the building vibration damping system according to any one of claims 1 to 4.
The actuator is the first actuator.
A second actuator connected to the movable support and the weight is further included.
The second actuator is a vibration damping system for a building, characterized in that it is a rotary inertial mass damper. In the building vibration damping system according to any one of claims 1 to 5.
Further equipped with an accelerometer installed in the building
The control device determines whether or not the acceleration data acquired from the acceleration sensor exceeds the first threshold value and the second threshold value, and determines whether or not the acceleration data has exceeded the first threshold value and the second threshold value.
The control device is
When it is determined that the acceleration data exceeds the first threshold value, the actuator is operated so as to match the vibration cycle of the weight with the primary natural cycle of the building.
When it is determined that the acceleration data exceeds the second threshold value, the actuator is operated so as to match the vibration cycle of the weight with any one of the secondary or higher natural cycles of the building. Vibration control system for buildings. A building, characterized in that the vibration damping system of the building according to any one of claims 1 to 6 is provided on the rooftop or an intermediate floor.

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