A super high-rise wind-resistant tuned mass damper monitoring system of a variable friction device

Abstract

The application relates to a super-high variable-friction-device wind-resistant tuned mass damper monitoring system, which comprises the following parts: a variable-friction bearing device installed at a main structure vibration position, used for bearing a mass block and transmitting horizontal and vertical loads to the main structure; the variable-friction bearing device comprises a base, a sliding core, a sliding friction pair and a top base, and the variable switching of a friction coefficient is realized by establishing or removing a static pressure oil film between the base and the sliding core and between the top base and the sliding core; the mass block; a structure bottom layer foundation vibration monitoring sensor used for monitoring horizontal vibration of the ground; a structure vibration monitoring sensor used for monitoring vibration of a target controlled position of the main structure; a mass block vibration monitoring sensor used for monitoring vibration acceleration of the mass block; a mass block displacement monitoring sensor used for monitoring vibration displacement of the mass block; and a monitoring assembly. Compared with the prior art, the application reduces vertical space occupation, improves starting sensitivity under small wind load and has a self-adaptive variable-friction function.

Description

Technical Field

[0001] This invention relates to the field of structural vibration reduction technology, and in particular to a monitoring system for a variable friction device for a wind-resistant tuned mass damper in ultra-high-rise buildings. Background Technology

[0002] Tuned mass damping (TMD) technology is a relatively mature technology in structural vibration control. Due to its low requirements for control components and its ability to be directly installed at a single point on the main structure, it has been widely used in the vibration control of tall and long-span structures. Among tall structures, super high-rise buildings are a typical application scenario. Super high-rise buildings are prone to low-order horizontal vibrations under wind loads, and tuned mass dampers (TMDs) are often used to reduce structural vibrations and thus improve structural comfort. For low-frequency horizontal TMDs, pendulum structures have become the preferred solution for wind-resistant TMDs in super high-rise buildings due to their simple structure. When oscillating at a small angle, their pendulum length... (m), which is the same as the initial static deformation of the vertical TMD stiffness element. Taking the Shanghai Tower with f = 0.111 (Hz) as an example, the pendulum length is nearly 20 meters, requiring a large amount of on-site space. Therefore, another technical route is the load-bearing horizontal TMD, in which the mass block needs to be supported on a movable device. Due to the large friction coefficient of traditional load-bearing devices, the mass block installed on them is difficult to overcome the inertial force and generate relative motion with the structure when the absolute value of structural acceleration is small under 1-year and 10-year wind loads, thus failing to achieve the effect of improving structural comfort under these working conditions. The hydrostatic bearing technology allows the mass block to be supported on a high-stiffness oil film. During sliding, there is no solid contact between the relatively moving surfaces, so as to achieve an effect of almost no friction during movement, which can greatly improve the starting sensitivity of the product. The variable friction load-bearing device requires a hydraulic system when establishing the hydrostatic bearing.

[0003] CN202310918988.9 discloses a spherical hydrostatic bearing tuned mass damping system, relating to the field of structural vibration reduction technology. Installed on the main structure requiring vibration control, the system consists of a sliding friction pair, a sliding plate, a mass block of the spherical hydrostatic bearing sliding support unit, a damper, a frequency tuner, a limit buffer, and a sensor monitor. However, its oil film is always open or only activated by an acceleration switch, lacking variable friction limit functionality. The hydrostatic bearing structure is complex, requiring a spherical surface, a shaft, and dual friction pairs, and the secondary displacement section occupies a large area.

[0004] CN202310806514.5 discloses a tuned mass damper, which is integrally mounted on the main structure requiring vibration control. When the main structure vibrates under external load excitation, the tuned mass damper reduces vibration. The tuned mass damper includes an active tuned mass damper unit, a passive tuned mass damper unit, a sensing unit, and a control drive unit. When the amplitude of the main structure under external load excitation is less than a set threshold, only the passive tuned mass damper unit operates, while the active tuned mass damper unit remains inactive, thus meeting the vibration reduction requirements with almost no energy consumption. When the amplitude of the main structure under external load excitation exceeds the set threshold, the active tuned mass damper unit activates, achieving efficient vibration reduction and energy dissipation. However, it requires a main actuator and a high-power energy source, and the friction load makes it difficult to start under small wind loads, and it cannot adaptively adjust friction limit functionality.

[0005] In summary, existing technologies have drawbacks such as large vertical space occupation and vibration reduction failure under small wind loads. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a monitoring system for a high-rise wind-resistant tuned mass damper with variable friction device, which reduces vertical space occupation, improves the start-up sensitivity of TMD under small wind loads, has adaptive variable friction function, strong robustness, and extends service life.

[0007] The objective of this invention can be achieved through the following technical solutions: This invention enables real-time control of the hydraulic system associated with the variable friction bearing device based on real-time monitoring of the structure, product, and environment.

[0008] This invention provides a monitoring system for a wind-resistant tuned mass damper with a variable friction device in ultra-high-rise buildings. The monitoring system is installed on the main structure requiring vibration control and includes: A variable friction bearing device is installed at locations of high vibration in the main structure to support mass blocks and transfer horizontal and vertical loads to the main structure. The variable friction bearing device includes a base, a sliding core, a sliding friction pair, and a top seat. The coefficient of friction is variable by establishing or removing a hydrostatic oil film between the base and the sliding core, and between the top seat and the sliding core. The mass block is supported on the top seat of the variable friction bearing device; The foundation vibration monitoring sensor is installed on the foundation layer of the structure to monitor horizontal vibrations transmitted from the ground surface. A structural vibration monitoring sensor is installed at a point of significant vibration in the main structure and close to the variable friction bearing device to monitor the vibration at the controlled location of the main structure target. A mass block vibration monitoring sensor is installed on the mass block to monitor the vibration acceleration of the mass block. A mass block displacement monitoring sensor is installed between the mass block and the main structure to monitor the vibration displacement of the mass block. The monitoring component is installed near the variable friction bearing device and is connected to the sensors and the hydraulic system attached to the variable friction bearing device. The monitoring component is configured to: collect monitoring signals from each sensor in real time, and automatically control the opening and closing of the hydraulic system and the oil pressure adjustment based on structural vibration, mass block vibration and displacement signals, so as to switch the variable friction bearing device between the ultra-low friction coefficient state when establishing a static pressure oil film and the higher friction coefficient state when no static pressure oil film is established.

[0009] Furthermore, when the variable friction bearing device establishes hydrostatic support, a hydrostatic oil film is formed between the base and the sliding core, and between the top seat and the sliding core. The weight of the mass block is transferred to the main structure in sequence through the top seat, the hydrostatic oil film, the sliding core, the hydrostatic oil film, and the base.

[0010] Furthermore, the top seat slides horizontally relative to the mass block; the sliding core is located in the middle; the bottom of the base is connected to the part of the main structure with the greatest vibration, and is responsible for ultimately transferring the load to the main structure.

[0011] Furthermore, the sliding friction pairs are respectively disposed between the mating surfaces of the base and the sliding core and between the mating surfaces of the top seat and the sliding core, for providing solid friction contact surfaces when the hydrostatic oil film is removed.

[0012] Furthermore, the foundation vibration monitoring sensor, structural vibration monitoring sensor, mass block vibration monitoring sensor, and mass block displacement monitoring sensor are electrically connected to the input end of the monitoring component via signal cables, and the output end of the monitoring component is connected to the control end of the hydraulic system attached to the variable friction bearing device.

[0013] Furthermore, the monitoring component integrates a data processing module and a hydraulic control module. The data processing module is used to perform real-time calculations on the signals collected by the foundation vibration monitoring sensor, the structural vibration monitoring sensor, the mass block vibration monitoring sensor, and the mass block displacement monitoring sensor. The hydraulic control module is used to control the establishment and removal of the static pressure oil film based on the calculation results.

[0014] Furthermore, the mass block displacement monitoring sensor is a displacement sensor installed between the mass block and the main structure to measure the horizontal displacement of the mass block relative to the main structure.

[0015] Furthermore, the structural vibration monitoring sensor is an acceleration sensor, which is arranged on the main structure close to the variable friction bearing device to obtain the vibration acceleration response of the mounting layer.

[0016] Furthermore, the monitoring component has automatic closed-loop control logic, which determines in real time whether it is necessary to improve structural comfort and whether the vibration amplitude of the mass block has not reached the limit threshold. If so, the hydraulic system is automatically activated to establish a static pressure oil film; when it is determined that it is no longer necessary to improve structural comfort, the hydraulic system is automatically shut off to remove the static pressure oil film. After the hydrostatic oil film is established, when the mass block displacement monitoring sensor detects that the mass block's motion amplitude has reached the preset limit threshold, the monitoring component automatically shuts down the hydraulic system, causing the variable friction bearing device to switch to a high friction coefficient state and use the sliding friction pair for energy consumption limit.

[0017] Furthermore, the monitoring component is also configured to automatically turn on the hydraulic system at preset intervals to establish a static pressure oil film and maintain it for a set time before turning it off, in order to prevent the sliding friction pair from being deformed due to being in a fixed pressure state for a long time.

[0018] Except for three scenarios—automatic determination of the need to improve structural comfort, remote manual opening, and preset periodic opening—the hydrostatic support is always in a closed state, and the variable friction bearing device operates at a high friction coefficient.

[0019] The monitoring component has manual and remote control logic, allowing technicians to remotely and manually turn the hydraulic oil source on or off and adjust the working pressure of the hydraulic system via the network.

[0020] The mass block moves horizontally and is supported by a variable friction bearing device rather than suspended, in order to reduce the vertical space occupied by the super high-rise building.

[0021] Compared with the prior art, the present invention has the following advantages: (1) Reduce vertical space occupation. The low-order frequency of ultra-high-rise buildings is extremely low. If a traditional pendulum TMD is used, the requirements for building clearance and structural layout are extremely high. The present invention adopts a horizontal bearing TMD, in which the mass block is supported by a variable friction bearing device instead of being suspended; the long pendulum or long stroke elastic element is eliminated, which greatly reduces the vertical space occupied, making it more suitable for installation in the limited space of the top machine room or equipment floor of ultra-high-rise buildings.

[0022] (2) Improve the starting sensitivity of TMD under small wind loads. Ordinary load-bearing TMDs have a high coefficient of friction. Under small wind loads with a 1-year or 10-year return period, the mass block is unable to overcome static friction and cannot move relative to the main structure, resulting in vibration reduction failure under small wind conditions. This invention introduces hydrostatic support technology to form a high-rigidity hydrostatic oil film between the base, sliding core, and top seat; there is no solid contact on the sliding surface, and the coefficient of friction is reduced to almost zero. The mass block can start quickly under small wind-induced vibrations, achieving effective vibration reduction under all wind conditions.

[0023] (3) It has an adaptive variable friction function. It combines vibration reduction and limiting. Under normal working conditions, the hydrostatic support is opened and the mass block is freely tuned to improve structural comfort. Under extreme / over-limit working conditions, when the displacement reaches the limit threshold, the system automatically closes the hydrostatic support, restores a higher friction coefficient, and uses the sliding friction pair to dissipate energy, suppressing excessive displacement and preventing collision damage. One device can simultaneously achieve tuned vibration reduction and passive limiting, without the need for additional independent limit blocks or viscous dampers.

[0024] (4) Robust and efficient, balancing automation and reliability. Remote manual control: supports remote intervention by technicians, facilitating debugging, maintenance and emergency operation; Automatic environmental sensing control: based on multi-source sensor signals such as structural foundation, floor, mass block acceleration and displacement, automatically determines whether the static pressure support needs to be opened; Timed maintenance control: automatically opens the static pressure support for short periods according to preset cycles to prevent the friction pair from being deformed by long-term pressure.

[0025] (5) Extend service life. The hydrostatic bearing is closed during most non-working periods; through periodic unloading and oil film support, the sliding friction pair is prevented from being in a constant high-pressure contact state for a long time; effectively slowing down the creep, plastic deformation and wear of friction materials, and reducing the maintenance cost throughout the entire life cycle. Attached Figure Description

[0026] Figure 1 A schematic diagram of the monitoring system for a wind-resistant tuned mass damper with variable friction device in ultra-high-rise buildings; Figure 2 This is a schematic diagram of the variable friction bearing device. Figure 1 (Enlarged view of region I).

[0027] Reference numerals: 1. Variable friction bearing device; 2. Mass block; 3. Largest vibration point of the main structure; 4. Structural foundation layer; 5. Vibration monitoring sensor of the bottom foundation of the structure; 6. Structural vibration monitoring sensor; 7. Vibration monitoring sensor of the mass block; 8. Displacement monitoring sensor of the mass block; 9. Monitoring component. 1-1, Base; 1-2, Static pressure oil film; 1-3, Sliding core; 1-4, Sliding friction pair; 1-5, Top seat. Detailed Implementation

[0028] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. Component models, material names, connection structures, control methods, algorithms, and other features not explicitly described in this technical solution are considered common technical features disclosed in the prior art.

[0029] Example 1 This embodiment provides a monitoring system for a variable friction device-based wind-resistant tuned mass damper in ultra-high-rise buildings. The monitoring system is installed on the main structure requiring vibration control, such as... Figure 1, 2 As shown, it includes: The variable friction bearing device 1 is installed at the point of greatest vibration 3 of the main structure to support the mass block 2 and transfer horizontal and vertical loads to the main structure. The variable friction bearing device 1 includes a base 1-1, a sliding core 1-3, a sliding friction pair 1-4 and a top seat 1-5. The variable friction coefficient is achieved by establishing or removing a hydrostatic oil film 1-2 between the base 1-1 and the sliding core 1-3, and between the top seat 1-5 and the sliding core 1-3. Mass block 2 is supported on the top seat 1-5 of the variable friction bearing device 1; The foundation vibration monitoring sensor 5 is installed on the foundation layer 4 of the structure to monitor horizontal vibrations transmitted from the ground surface. The structural vibration monitoring sensor 6 is installed at the point of greatest vibration in the main structure 3 and close to the variable friction bearing device 1, and is used to monitor the vibration of the controlled position of the main structure target. Mass block vibration monitoring sensor 7 is installed on mass block 2 and is used to monitor the vibration acceleration of mass block 2; Mass block displacement monitoring sensor 8 is installed between mass block 2 and the main structure to monitor the vibration displacement of the mass block; The monitoring component 9 is installed near the variable friction bearing device 1 and is connected to the signals of each sensor and the hydraulic system attached to the variable friction bearing device 1. The monitoring component 9 is configured to: collect monitoring signals from each sensor in real time, and automatically control the opening and closing of the hydraulic system and the oil pressure adjustment based on structural vibration, mass block vibration and displacement signals, so that the variable friction bearing device 1 switches between an ultra-low friction coefficient state when a static pressure oil film is established and a higher friction coefficient state when a static pressure oil film is not established.

[0030] In a specific embodiment, when the variable friction bearing device 1 establishes a hydrostatic support, a hydrostatic oil film 1-2 is formed between the base 1-1 and the sliding core 1-3, and between the top seat 1-5 and the sliding core 1-3. The weight of the mass block 2 is transferred to the main structure in sequence through the top seat 1-5, the hydrostatic oil film 1-2, the sliding core 1-3, the hydrostatic oil film 1-2, and the base 1-1.

[0031] In a specific implementation, the top seat 1-5 slides horizontally relative to the mass block 2; the sliding core 1-3 is located in the middle; the bottom of the base 1-1 is connected to the main structure vibration point 3, which is responsible for ultimately transferring the load to the main structure.

[0032] In a specific embodiment, the sliding friction pair 1-4 is respectively disposed between the mating surfaces of the base 1-1 and the sliding core 1-3 and between the mating surfaces of the top seat 1-5 and the sliding core 1-3, and is used to provide a solid friction contact surface when the hydrostatic oil film 1-2 is removed.

[0033] In a specific implementation, the foundation vibration monitoring sensor 5, the structural vibration monitoring sensor 6, the mass block vibration monitoring sensor 7, and the mass block displacement monitoring sensor 8 are electrically connected to the input end of the monitoring component 9 via signal cables, and the output end of the monitoring component 9 is connected to the hydraulic system control end of the variable friction bearing device 1.

[0034] In a specific implementation, the monitoring component 9 integrates a data processing module and a hydraulic control module. The data processing module is used to perform real-time calculations on the signals collected by the structural foundation vibration monitoring sensor 5, the structural vibration monitoring sensor 6, the mass block vibration monitoring sensor 7, and the mass block displacement monitoring sensor 8. The hydraulic control module is used to control the establishment and removal of the static pressure oil film 1-2 according to the calculation results.

[0035] In a specific embodiment, the mass block displacement monitoring sensor 8 is a displacement sensor installed between the mass block 2 and the main structure to measure the horizontal displacement of the mass block 2 relative to the main structure.

[0036] In a specific embodiment, the structural vibration monitoring sensor 6 is an acceleration sensor, which is arranged on the main structure near the variable friction bearing device 1 to obtain the vibration acceleration response of the mounting layer.

[0037] In a specific implementation, the monitoring component 9 has an automatic closed-loop control logic that determines in real time whether it is necessary to improve structural comfort and whether the vibration amplitude of the mass block has not reached the limit threshold. If so, the hydraulic system is automatically activated to establish a static pressure oil film. When it is determined that there is no need to improve structural comfort, the hydraulic system is automatically shut down to remove the static pressure oil film. After the hydrostatic oil film is established, when the mass block displacement monitoring sensor 8 detects that the motion amplitude of the mass block 2 reaches the preset limit threshold, the monitoring component 9 automatically shuts down the hydraulic system, causing the variable friction bearing device 1 to switch to a high friction coefficient state, and using the sliding friction pair 1-4 for energy consumption limit.

[0038] In a specific implementation, the monitoring component 9 is also configured to automatically open the hydraulic system at preset intervals to establish a static pressure oil film and maintain it for a set time before closing it, so as to prevent the sliding friction pair 1-4 from being deformed due to being in a fixed pressure state for a long time.

[0039] Except for three scenarios—automatic determination of the need to improve structural comfort, remote manual opening, and preset periodic opening—the hydrostatic support is always in the closed state, and the variable friction bearing device 1 operates in a state with a high friction coefficient.

[0040] The monitoring component 9 has manual and remote control logic, allowing technicians to remotely and manually turn the hydraulic oil source on or off and adjust the working pressure of the hydraulic system via the network.

[0041] Mass block 2 moves in a horizontal direction and is supported by a variable friction bearing device 1 rather than suspended, so as to reduce the occupation of the vertical space of the super high-rise building.

[0042] Components not described in detail in this embodiment are all existing components that can be purchased through public channels.

[0043] The above description of the embodiments is provided to enable those skilled in the art to understand and use the invention. It will be apparent to those skilled in the art that various modifications can be made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present invention is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the invention should be within the protection scope of the present invention.

Claims

1. A monitoring system for a variable friction device for a wind-resistant tuned mass damper in ultra-high-rise buildings, wherein the monitoring system is installed on the main structure requiring vibration control, characterized in that... include: A variable friction bearing device (1) is installed at a location of high vibration in the main structure (3) to support a mass block (2) and transfer horizontal and vertical loads to the main structure. The variable friction bearing device (1) includes a base (1-1), a sliding core (1-3), a sliding friction pair (1-4), and a top seat (1-5). The variable friction coefficient is achieved by establishing or removing a hydrostatic oil film (1-2) between the base (1-1) and the sliding core (1-3) and between the top seat (1-5) and the sliding core (1-3). The mass block (2) is supported on the top seat (1-5) of the variable friction bearing device (1); The foundation vibration monitoring sensor (5) is installed on the foundation layer (4) of the structure to monitor the horizontal vibration transmitted from the ground surface; A structural vibration monitoring sensor (6) is installed at the point of greatest vibration in the main structure (3) and close to the variable friction bearing device (1) to monitor the vibration of the controlled position of the main structure target. A mass block vibration monitoring sensor (7) is installed on the mass block (2) to monitor the vibration acceleration of the mass block (2); Mass block displacement monitoring sensor (8) is installed between mass block (2) and the main structure to monitor the vibration displacement of mass block; The monitoring component (9) is installed near the variable friction bearing device (1) and is connected to the sensors and the hydraulic system attached to the variable friction bearing device (1) for signal connection. The monitoring component (9) is configured to: collect the monitoring signals of each sensor in real time, and automatically control the opening and closing of the hydraulic system and the oil pressure adjustment according to the structural vibration, mass block vibration and displacement signals, so that the variable friction bearing device (1) switches between the ultra-low friction coefficient state when establishing a static pressure oil film and the higher friction coefficient state when not establishing a static pressure oil film.

2. The monitoring system for a variable friction device for an ultra-high-rise wind-resistant tuned mass damper according to claim 1, characterized in that, When the variable friction bearing device (1) establishes a static pressure support, a static pressure oil film (1-2) is formed between the base (1-1) and the sliding core (1-3) and between the top seat (1-5) and the sliding core (1-3). The weight of the mass block (2) is transferred to the main structure in sequence through the top seat (1-5), the static pressure oil film (1-2), the sliding core (1-3), the static pressure oil film (1-2), and the base (1-1).

3. The monitoring system for a variable friction device for an ultra-high-rise wind-resistant tuned mass damper according to claim 1, characterized in that, The top seat (1-5) slides horizontally relative to the mass block (2); the sliding core (1-3) is located in the middle; the bottom of the base (1-1) is connected to the main structure where the vibration is greatest (3), and is responsible for ultimately transferring the load to the main structure.

4. A monitoring system for a variable friction device for an ultra-high-rise wind-resistant tuned mass damper according to claim 1, characterized in that, The sliding friction pairs (1-4) are respectively disposed between the mating surfaces of the base (1-1) and the sliding core (1-3) and between the mating surfaces of the top seat (1-5) and the sliding core (1-3), and are used to provide solid friction contact surfaces when the hydrostatic oil film (1-2) is removed.

5. A monitoring system for a variable friction device for an ultra-high-rise wind-resistant tuned mass damper according to claim 1, characterized in that, The foundation vibration monitoring sensor (5), structural vibration monitoring sensor (6), mass block vibration monitoring sensor (7) and mass block displacement monitoring sensor (8) are electrically connected to the input end of the monitoring component (9) via signal cables. The output end of the monitoring component (9) is connected to the hydraulic system control end of the variable friction bearing device (1).

6. The monitoring system for a variable friction device for an ultra-high-rise wind-resistant tuned mass damper according to claim 1, characterized in that, The monitoring component (9) integrates a data processing module and a hydraulic control module. The data processing module is used to perform real-time calculations on the signals collected by the structural foundation vibration monitoring sensor (5), structural vibration monitoring sensor (6), mass block vibration monitoring sensor (7), and mass block displacement monitoring sensor (8). The hydraulic control module is used to control the establishment and removal of the static pressure oil film (1-2) according to the calculation results.

7. A monitoring system for a variable friction device for an ultra-high-rise wind-resistant tuned mass damper according to claim 1, characterized in that, The mass block displacement monitoring sensor (8) is a displacement sensor installed between the mass block (2) and the main structure to measure the horizontal displacement of the mass block (2) relative to the main structure.

8. A monitoring system for a variable friction device for an ultra-high-rise wind-resistant tuned mass damper according to claim 1, characterized in that, The structural vibration monitoring sensor (6) is an acceleration sensor, which is arranged on the main structure near the variable friction bearing device (1) to obtain the vibration acceleration response of the mounting layer.

9. A monitoring system for a variable friction device for an ultra-high-rise wind-resistant tuned mass damper according to claim 1, characterized in that, The monitoring component (9) has an automatic closed-loop control logic, which determines in real time whether it is necessary to improve the structural comfort and whether the vibration amplitude of the mass block has not reached the limit threshold. If so, the hydraulic system is automatically turned on to establish a static pressure oil film. When it is determined that it is no longer necessary to improve the structural comfort, the hydraulic system is automatically turned off to remove the static pressure oil film. After the hydrostatic oil film is established, when the mass block displacement monitoring sensor (8) detects that the motion amplitude of the mass block (2) reaches the preset limit threshold, the monitoring component (9) automatically shuts down the hydraulic system, so that the variable friction bearing device (1) switches to the high friction coefficient state and uses the sliding friction pair (1-4) to limit energy consumption.

10. A monitoring system for a variable friction device for an ultra-high-rise wind-resistant tuned mass damper according to claim 1, characterized in that, The monitoring component (9) is also configured to automatically open the hydraulic system at preset intervals to establish a static pressure oil film and maintain it for a set time before closing it, so as to prevent the sliding friction pair (1-4) from being in a fixed pressure state for a long time and causing deformation.

Images