A tuned mass damper device suitable for a plate column joint

Abstract

The application relates to a tuned mass damper device suitable for a slab-column joint, which is adjustable in mass / stiffness / damping and belongs to the technical field of structural vibration control. The device comprises a mass unit, a fixed-end component arranged at one end of the mass unit, a stiffness unit and a damping unit arranged between the mass unit and the fixed-end component; the tuned mass damper device further comprises a bottom plate connected with the fixed-end component, a slab-column joint connector and a slide rail system arranged between the bottom plate and the mass unit; the slab-column joint connector is connected with the bottom plate and arranged at the other end of the mass unit. The application can effectively solve the construction difficulty of the TMD system for the slab reconstruction and the problem that the mass of the TMD system easily generates a large additional bending moment at the column end, and can also solve the problem of working fluid of the traditional viscous damper. The application can be arranged at the tuned structural frequency of the slab-column joint of a structure to realize vibration control under wind-induced or human-induced response.

Description

Technical Field

[0001] This invention relates to a tuned mass damping device suitable for plate-column joints, which has adjustable mass / stiffness / damping and belongs to the field of structural vibration control technology. Background Technology

[0002] To meet people's individual needs for functionality, aesthetics, and economy in different structural forms of buildings, building structures are becoming increasingly diversified and complex, with tall structures and lightweight steel structures gaining popularity. However, these structures typically have long natural periods or exhibit flexible characteristics, and may experience significant vibrations under wind loads or even pedestrian loads, thus adversely affecting structural safety and comfort. To effectively control the dynamic response of the structure, the traditional solution is to increase its lateral stiffness. While this is an effective and relatively intuitive solution, it also significantly impacts the structure's economy, aesthetics, and spatial performance.

[0003] Without significantly impacting structural economy, aesthetics, or spatial performance, tuned mass dampers (TMDs) can effectively control wind-induced or anthropogenic vibrations of a structure. A TMD typically consists of a mass block, an elastic element, and a linear damper, providing inertial force, linear elastic restoring force, and damping force to the system, respectively. When the natural frequency of the TMD substructure is close to the fundamental frequency of the main structure, when the main structure vibrates in a certain direction, the TMD generates an opposite force relative to the structure, thereby suppressing the structure's dynamic response.

[0004] When existing supported or suspended tuned mass dampers are used for the reinforcement and renovation of existing buildings, they usually need to be fixedly connected to the upper and lower floor slabs. Sometimes, excessive mass can generate a large additional bending moment at the column ends, as seen in the speed-regulating tuned mass damper disclosed in CN101033628A and the floor slab damping structure disclosed in CN203961042U. The dampers in the TMD system are usually viscous dampers, but they are difficult to meet the technical requirements of low damping and have drawbacks such as fluid flow and regular maintenance. Therefore, there is an urgent need to propose a new tuned mass damping technology to solve the problems existing in the current technology. Summary of the Invention

[0005] To address the aforementioned deficiencies in the prior art, this application provides a tuned mass damping device suitable for slab-column joints, whose mass / stiffness / damping is adjustable. This device is used to solve the construction difficulties of TMD systems in floor slab modifications and the large additional bending moment that the mass can easily generate at the column end. In addition, it can also solve problems such as the working fluid flow of traditional viscous dampers.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0007] A tuned mass damping device for plate-column joints, wherein the mass / stiffness / damping is adjustable, includes a mass unit, a fixed-end member disposed at one end of the mass unit, and stiffness and damping units disposed between the mass unit and the fixed-end member; the tuned mass damping device further includes a base plate connected to the fixed-end member, a plate-column joint connector, and a slide rail system disposed between the base plate and the mass unit; the plate-column joint connector is connected to the base plate and disposed at the other end of the mass unit.

[0008] The mass unit includes multiple large-mass rectangular steel plates and multiple small-mass rectangular steel plates that are fixed and stacked together by screws and nuts; the multiple small-mass rectangular steel plates are fixed to the top of the large-mass rectangular steel plates by screws and nuts; and vertical steel plates are also provided on the side of the multiple large-mass rectangular steel plates and multiple small-mass rectangular steel plates near the fixed end member.

[0009] The stiffness unit includes a spring, the spring having a linear optical axis inside, and flange supports and flange linear bearings fixed at both ends of the spring by bushings. The flange supports are connected to the mass unit, and the flange linear bearings are connected to the fixed end member.

[0010] The damping unit includes a cylinder and a valve valve with a throttle orifice. The cylinder has a moving shaft inside. One end of the cylinder has a lug connector and is connected to the mass unit. One end of the moving shaft has an end plate and is connected to the fixed end member.

[0011] The slide rail system includes two sets of light rails, each with a limiting plate at both ends. A single-sided track pulley is tangent to the upper surface of the light rail, and the fixed bracket of the single-sided track pulley is connected to the mass unit.

[0012] Furthermore, the stiffness unit and the damping unit are two symmetrically arranged stiffness units and one damping unit, with the damping unit positioned between the two symmetrically arranged stiffness units.

[0013] Furthermore, in the mass unit, the symmetrical planes of the large-mass rectangular steel plate overlap and allow four sets of screws to pass through its internal holes simultaneously. The small-mass rectangular steel plate is used to pass through two sets of screws and is arranged symmetrically relative to the large-mass rectangular steel plate. All the steel plates can be arbitrarily combined according to the actual control effect to adjust the mass of the system. The connection positions of the vertical steel plate and the flange support and ear plate connector are on the same working plane and symmetrically arranged. The large-mass rectangular steel plate is connected to four sets of single-sided track pulleys and is arranged in a centrally symmetrical manner.

[0014] Furthermore, the spring is collinear with the central axis of the linear optical axis, the flange support, and the flange linear bearing. One end of the linear optical axis is inserted into the flange support and kept fixed, while the other end passes through the flange linear bearing.

[0015] Furthermore, both ends of the spring are respectively held and fixed to the flange support and the flange linear bearing through the bushing. The other end of the flange support is connected to the vertical steel plate in the mass unit, and the other end of the flange linear bearing is connected to the fixed end member. The springs are assembled using specifications with the same inner and outer diameters but different numbers of turns and lengths, and the bushing can adjust the holding depth of the spring to adjust the stiffness of the tuned mass damping device.

[0016] Furthermore, the two sets of light rails are arranged symmetrically and parallel to the base plate, and the two sets of light rails are provided with limiting plates at both ends to limit the displacement of the tuned mass damping device. The flange of the single-sided track pulley points to the outside of the base plate.

[0017] Furthermore, the effective stroke of the stiffness unit and the damping unit should be greater than the limiting distance of the limiting plates at both ends of the light rail, so as to avoid impact damage to the stiffness unit and the damping unit due to excessive stroke.

[0018] Furthermore, one end of the cylinder is hinged to the ear plate connector, the motion shaft is connected to the end plate, and the central axis of the cylinder and the plane of symmetry of the mass unit along the direction of motion are on the same working plane.

[0019] Furthermore, the valve containing the throttle orifice is kept in a sealed connection with the cylinder's air orifice, and valves with different throttle orifice diameters are selected to adjust the damping of the tuned mass damping device.

[0020] Furthermore, the plate-column node connector is radially connected to the semi-circular notch of the base plate, the plate-column node connector is provided with stiffening ribs to enhance rigidity, the semi-circular notch of the base plate is adapted to the diameter of the structural column, and the clamps provided between the plate-column node connectors are used to fix the plate-column node connector to the structural column.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] This invention provides a tuned mass damping device suitable for plate-column joints and with adjustable mass / stiffness / damping. The tuned mass damping device has the following advantages:

[0023] 1. This tuned mass damping device can be directly installed at the slab-column joint and can be mechanically connected only to the column end, avoiding secondary construction of structural components such as floor slabs. Simultaneously, this arrangement can control the additional bending moment generated at the column end to a low level. This device can be used for early-stage vibration reduction design of new buildings as well as for the reinforcement and reconstruction of existing buildings.

[0024] 2. The mass unit of this tuned mass damping device is composed of steel plates of different rectangles, which can control the actual weight of the system. Furthermore, the springs in this system are assembled, allowing for arbitrary replacement or adjustment of the bushing depth to regulate the effective stiffness. In other words, this tuned mass damping device allows for adjustable frequency characteristics of the system by adjusting its mass and stiffness.

[0025] 3. The damping unit of this tuned mass damping device provides a rate-dependent damping force through air damping. The damping unit uses air as a relatively stable damping medium, which can achieve a small and reliable damping force. The working principle is simple and requires no maintenance in the later stage. Furthermore, the damping force can be further adjusted by adjusting the size of the throttle orifice of the valve. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the embodiments will be briefly described below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. It should be understood that the specific shapes and structures shown in the drawings should not generally be regarded as limiting conditions for implementing this application. For example, based on the technical concepts disclosed in this application and the exemplary drawings, those skilled in the art are able to easily make conventional adjustments or further optimizations to the addition / reduction / classification, specific shapes, positional relationships, connection methods, and size ratios of certain units (components).

[0027] Figure 1 This is a three-dimensional structural schematic diagram of the tuned mass damping device for plate-column nodes provided by the present invention in one embodiment, viewed from one perspective.

[0028] Figure 2 This is a three-dimensional structural schematic diagram of the tuned mass damping device for plate-column nodes provided by the present invention in one embodiment, viewed from another perspective.

[0029] Figure 3 This is a schematic diagram of the structure of the tuned mass damping device for plate-column nodes provided by the present invention in one embodiment, showing the cooperation between the mass unit and the single-sided track pulley.

[0030] Figure 4This is an exploded structural diagram of the stiffness element in the tuned mass damping device for plate-column joints provided by the present invention in one embodiment.

[0031] Figure 5 This is a schematic diagram of the damping unit in a tuned mass damping device for plate-column nodes provided by the present invention in one embodiment;

[0032] Figure 6 This is a schematic diagram of the slide rail system in a tuned mass damping device for plate-column joints provided by the present invention in one embodiment;

[0033] Figure 7 This is a schematic diagram of the arrangement and assembly of the tuned mass damping device for plate-column nodes provided by the present invention in one embodiment.

[0034] Figure 8 The present invention provides test results of the damping unit in a tuned mass damping device for plate-column joints under different loading frequencies with a throttling orifice diameter of 2 mm, as described in one embodiment.

[0035] Figure 9 This is a comparison of the absolute acceleration time history curves of the tuned mass damping device for plate-column nodes provided by the present invention under artificial resonance excitation in one embodiment.

[0036] Figure label:

[0037] 1. Large-mass rectangular steel plate; 2. Small-mass rectangular steel plate; 3. Vertically mounted steel plate; 4. Screw rod; 5. Flange support; 6. Flange linear bearing; 7. Linear shaft; 8. Spring; 9. Bushing; 10. Ear plate connector; 11. Cylinder; 12. Motion shaft; 13. Valve; 14. End plate; 15. Fixed end component; 16. Light rail; 17. Single-sided track pulley; 18. Limiting plate; 19. Base plate; 20. Slab-column joint connector; 21. Clamp; 22. Structural column; 23. Structural floor slab. Detailed Implementation

[0038] In the description of this application: unless otherwise stated, "a plurality of" means two or more. The terms "first," "second," "third," etc., in this application are intended to distinguish the objects referred to and do not have any special meaning in terms of technical connotation (e.g., they should not be construed as an emphasis on importance or order). Expressions such as "comprising," "including," and "having" also mean "not limited to" (certain units, components, materials, steps, etc.).

[0039] The terms used in this application, such as "upper," "lower," "left," "right," and "middle," are generally used to facilitate intuitive understanding by referring to the accompanying drawings, and are not absolute limitations on the positional relationships in the actual product. Changes in these relative positional relationships, without departing from the technical concept disclosed in this application, should also be considered within the scope of this application.

[0040] The following is in conjunction with the appendix Figure 1-9 The present invention will be further described in detail below to facilitate a clear understanding of the invention, but these descriptions do not constitute a limitation thereof.

[0041] Example 1

[0042] As attached Figure 1-2 As shown in this embodiment, a tuned mass damping device suitable for plate-column joints is provided. Its mass / stiffness / damping is adjustable. It includes a mass unit, a fixed-end member 15 disposed at one end of the mass unit, and stiffness and damping units disposed between the mass unit and the fixed-end member 15. In this embodiment, the stiffness and damping units consist of two symmetrically arranged stiffness units and one damping unit, with the damping unit positioned between the two symmetrically arranged stiffness units. The tuned mass damping device also includes a base plate 19 connected to the fixed-end member, a plate-column joint connector 20, and a slide rail system disposed between the base plate 19 and the mass unit. The plate-column joint connector 20 is connected to the base plate 19 and disposed at the other end of the mass unit.

[0043] like Figure 3 As shown, the mass unit includes multiple large-mass rectangular steel plates 1 and multiple small-mass rectangular steel plates 2, which are fixed and stacked together by four sets of screws 4 and nuts. The multiple small-mass rectangular steel plates 2 are fixed to the top of the large-mass rectangular steel plates 1 by screws and nuts. A vertical steel plate 3 is also provided on the side of the multiple large-mass rectangular steel plates 1 and multiple small-mass rectangular steel plates 2 near the fixed-end member 15. In the mass unit, the symmetrical planes of the large-mass rectangular steel plates 1 overlap, allowing the four sets of screws 4 to pass through their internal holes simultaneously. The small-mass rectangular steel plates 2 are used to pass through two sets of screws 4 and are arranged symmetrically relative to the large-mass rectangular steel plates 1. All the steel plates can be arbitrarily combined to adjust the mass of the system according to the actual control effect. The vertical steel plates 3 are connected to the flange support 5 and the ear plate connector 10 on the same working plane and are symmetrically arranged. The large-mass rectangular steel plates 1 are connected to four sets of single-sided track pulleys 17 and are arranged in a centrally symmetrical manner.

[0044] like Figure 4As shown, the stiffness unit includes a spring 8, inside which is a linear optical axis 7. At both ends of the spring 8 are flange supports 5 and flange linear bearings 6, which are fixed by bushings 9. The flange supports 5 are connected to the mass unit, and the flange linear bearings 6 are connected to the fixed-end member 15. The central axes of the spring 8, the linear optical axis 7, the flange supports 5, and the flange linear bearings 6 are collinear. One end of the linear optical axis 7 is inserted into the flange support 1 and held fixed, while the other end passes through the flange linear bearing 6. Both ends of the spring 8 are fixed to the flange supports 5 and the flange linear bearings 6 respectively by bushings 9. The other end of the flange support 5 is connected to the vertically mounted steel plate 3 in the mass unit, and the other end of the flange linear bearings 6 is connected to the fixed-end member 15. In this embodiment, springs 8 are assembled using different numbers of coils and lengths with the same inner and outer diameters, and the bushings 9 can adjust the holding depth of the spring to adjust the stiffness of the tuned mass damping device.

[0045] like Figure 5 As shown, the damping unit includes a cylinder 11 and a valve 13 with a throttling orifice. The cylinder 11 has a motion shaft 12 inside. One end of the cylinder 11 has a lug connector 10 connected to the mass unit. One end of the motion shaft 12 has an end plate 14 connected to a fixed-end member 15. The lug at one end of the cylinder 11 is hinged to the lug connector 10. The motion shaft 12 is connected to the end plate 14. The central axis of the cylinder 11 and the plane of symmetry of the mass unit along the direction of motion are on the same working plane. The valve 13 with the throttling orifice maintains a sealed connection with the air orifice of the cylinder 11. Valve 13s with different orifice diameters are selected to adjust the damping of the tuned mass damping device.

[0046] like Figure 6 As shown, the slide rail system includes two sets of light rails 16. Each light rail 16 has a limiting plate 18 at both ends. A single-sided track pulley 17 is tangentially positioned to the upper surface of the light rail 16, and its fixed support is connected to the mass unit. The two sets of light rails 16 are arranged symmetrically and parallel to the base plate 19. The limiting plates 18 at both ends of the two sets of light rails 16 are used to limit the displacement of the tuned mass damping device. The flange of the single-sided track pulley 17 points outward from the base plate 19.

[0047] In this embodiment, the effective stroke of the stiffness unit and the damping unit should be greater than the limiting distance of the limiting plates 18 at both ends of the light rail 16, so as to avoid impact damage to the stiffness unit and the damping unit due to excessive stroke.

[0048] like Figure 7 As shown, the plate-column node connector 20 is radially connected to the semi-circular notch of the base plate 19. The plate-column node connector 20 is provided with stiffening ribs to enhance rigidity. The semi-circular notch of the base plate 19 is adapted to match the diameter of the structural column 22. The clamps 21 provided between the plate-column node connectors 20 are used to fix the plate-column node connector 20 and the structural column 22.

[0049] Example 2

[0050] like Figure 8-9 As shown, the test results of the damping unit in the tuned mass damping device with adjustable mass / stiffness / damping for plate-column joints provided in this embodiment at different loading frequencies with a throttling orifice diameter of 2mm are as follows. Figure 9 As shown, its absolute acceleration time history curve under a certain artificial resonance excitation is compared to... Figure 9 As shown. Experimental results indicate that the air damping of the damping unit in the tuned mass damping device of this embodiment can provide relatively stable low-damping characteristics.

[0051] The above are merely preferred embodiments of the present invention and do not constitute any limitation on the structure of the present invention. The arrangement and quantity of the present invention are not limited to this example and can be optimized according to actual engineering conditions. Any modifications, equivalent changes, and decorations made to the above embodiments based on the technical principles of the present invention, without departing from the scope of the present invention, are still within the scope of the present invention.

Claims

1. A tuned mass damping device suitable for plate-column joints, wherein the mass / stiffness / damping is adjustable, characterized in that: The device includes a mass unit, a fixed-end member (15) disposed at one end of the mass unit, and a stiffness unit and a damping unit disposed between the mass unit and the fixed-end member (15); the tuned mass damping device also includes a base plate (19) connected to the fixed-end member, a plate-column node connector (20), and a slide rail system disposed between the base plate (19) and the mass unit; the plate-column node connector (20) is connected to the base plate (19) and disposed at the other end of the mass unit; The mass unit includes multiple large-mass rectangular steel plates (1) and multiple small-mass rectangular steel plates (2) that are fixed and stacked by screws (4) and nuts; the multiple small-mass rectangular steel plates (2) are fixed to the top of the large-mass rectangular steel plates (1) by screws and nuts; the multiple large-mass rectangular steel plates (1) and the multiple small-mass rectangular steel plates (2) are also provided with vertical steel plates (3) on the side near the fixed end member (15); The stiffness unit includes a spring (8), and the spring (8) has a linear optical axis (7) inside. At both ends of the spring (8), there are flange supports (5) and flange linear bearings (6) that are fixed by bushings (9). The flange supports (5) are connected to the mass unit, and the flange linear bearings (6) are connected to the fixed end member (15). The damping unit includes a cylinder (11) and a valve (13) with a throttle orifice. The cylinder (11) has a motion shaft (12) inside. One end of the cylinder (11) is provided with an ear plate connector (10) and connected to the mass unit. One end of the motion shaft (12) is provided with an end plate (14) and connected to the fixed end member (15). The slide rail system includes two sets of light rails (16), each of which is provided with a limiting plate (18) at both ends. A single-sided track pulley (17) is provided tangentially to the upper surface of the light rail (16), and the fixed bracket of the single-sided track pulley (17) is connected to the mass unit. The two ends of the spring (8) are respectively held and fixed to the flange support (5) and the flange linear bearing (6) through the bushing (9). The other end of the flange support (5) is connected to the vertical steel plate (3) in the mass unit, and the other end of the flange linear bearing (6) is connected to the fixed end member (15). The spring (8) is assembled with different numbers of turns and lengths of the same inner and outer diameter, and the bushing (9) can adjust the holding depth of the spring to adjust the stiffness of the tuning mass damping device. The valve (13) containing the throttle orifice is sealed to the air hole of the cylinder (11), and valves (13) with different throttle orifice diameters are selected to adjust the damping of the tuned mass damping device. The plate-column node connector (20) is radially connected to the semi-circular notch of the base plate (19). The plate-column node connector (20) is provided with stiffening ribs to enhance rigidity. The semi-circular notch of the base plate (19) is adapted to match the diameter of the structural column (22). The clamps (21) provided between the plate-column node connectors (20) are used to fix the plate-column node connector (20) and the structural column (22).

2. The tuned mass damping device for plate-column joints according to claim 1, characterized in that: The stiffness unit and the damping unit consist of two symmetrically arranged stiffness units and one damping unit, with the damping unit positioned between the two symmetrically arranged stiffness units.

3. A tuned mass damping device suitable for plate-column joints according to claim 1, characterized in that: In the mass unit, the symmetrical planes of the large mass rectangular steel plate (1) overlap and allow four sets of screws (4) to pass through its internal holes simultaneously. The small mass rectangular steel plate (2) is used to pass through two sets of screws (4) and is arranged symmetrically relative to the large mass rectangular steel plate (1). All the steel plates can be arbitrarily combined according to the actual control effect to adjust the mass of the system. The vertical steel plate (3) is connected to the flange support (5) and the ear plate connector (10) on the same working plane and is symmetrically arranged. The large mass rectangular steel plate (1) is connected to four sets of single-sided track pulleys (17) and is arranged in a centrally symmetrical manner.

4. A tuned mass damping device suitable for plate-column joints according to claim 1, characterized in that: The spring (8) is collinear with the central axis of the linear optical axis (7), the flange support (5), and the flange linear bearing (6). One end of the linear optical axis (7) is inserted into the flange support (1) and kept fixed, while the other end passes through the flange linear bearing (6).

5. A tuned mass damping device suitable for plate-column joints according to claim 1, characterized in that: The two sets of light rails (16) are arranged symmetrically and parallel to the base plate (19). The two sets of light rails (16) are provided with limiting plates (18) at both ends to limit the displacement of the tuned mass damping device. The flange of the single-sided track pulley (17) points to the outside of the base plate (19).

6. A tuned mass damping device suitable for plate-column joints according to claim 1, characterized in that: The effective stroke of the stiffness unit and the damping unit should be greater than the limiting distance of the limiting plates (18) at both ends of the light rail (16) to avoid impact damage caused by the stiffness unit and the damping unit exceeding the stroke limit.

7. A tuned mass damping device suitable for plate-column joints according to claim 1, characterized in that: One end of the cylinder (11) is hinged to the ear plate connector (10), the motion shaft (12) is connected to the end plate (14), and the central axis of the cylinder (11) and the symmetrical plane of the mass unit along the direction of motion are on the same working plane.

Images