CN105971148A - Universal swing track supporting tuned mass damper - Google Patents

Abstract

The invention provides a tuning mass damper supported by a universal swing track, the structure includes a support, a hemispherical mass block, a diagonal spring and a damper; the support is in the shape of a cylinder and the upper part of the support is provided with a On the concave surface, a heavy-duty universal ball is arranged on the arc-shaped concave surface, the bottom of the hemispherical mass block is placed in the arc-shaped concave surface, and the upper part of the hemispherical mass block is connected to the support through cable-stayed springs and dampers respectively. The arc-shaped concave surface of the support is provided with a high-damping rubber buffer layer, and the heavy-duty universal ball is fixed on the high-damping rubber buffer layer; The hemispherical mass block can swing universally under the action of earthquake and earthquake, and can make the inclined spring and the viscous fluid damper move simultaneously to dissipate energy when swinging.

Description

Universal swing track supported tuned mass damper

technical field

The invention relates to a tuned mass damper assembled on the upper part of a building under the action of a heavy-duty universal ball track support system, belonging to the technical field of vibration control of civil structures, in particular to a universal damper for wind and earthquake resistance of structures. Sport's tuned mass dampers.

Background technique

With the development of wind and earthquake resistance design theory of civil engineering structures, traditional design methods are difficult to meet the needs of earthquake and wind resistance design. Vibration control theory, technology and application results, research and application of civil engineering structure vibration control technology. With the rapid development and practice of structural vibration control technology, the Tuned Mass Damper (TMD) system as a traditional structural passive vibration reduction system has become a research hotspot in civil engineering and has been applied to some high-rise buildings and towering structures. .

The TMD system adds inertial mass on the top floor of the building structure, and is equipped with a spring system and a damping system. Through the principle of resonance, a certain vibration mode of the structure is controlled to achieve the effect of vibration reduction. The TMD system can effectively attenuate the vibration response of the main structure and have an obvious control effect on the vibration of the structure, so the main structure can reduce the cross-sectional size of the components, reduce the reinforcement, simplify the construction, and obviously save the cost of the structural engineering; it occupies very little building area, and it is easy to install, maintain and replace; the existing structure of the main structure can be fully utilized as the TMD, and no special tuning device is required; TMD is used for some structures that are difficult to take traditional strengthening measures, such as high-rise structures, high-rise tower structures, For major structures such as long-span structures and offshore platforms, an alternative vibration reduction measure is provided. Tuned mass dampers have broad application prospects in the anti-seismic and wind-resistant control of high-rise and towering structures. Compared with the traditional anti-seismic design of structures, the adoption of TMD system has been recognized by structural engineering experts earlier, and it is used to control the wind vibration and earthquake response of structures.

Tuned liquid dampers (Tuned Liquid Damper (TLD for short) is a kind of passive energy dissipation vibration damping device derived from the TMD system theory, and a lot of research and application have been carried out in recent years. The tuned liquid damper uses the liquid in the fixed tank as an inertial mass to provide vibration damping by the dynamic side force generated during the sloshing process. It has the advantages of simple structure, easy installation, good automatic activation performance, no need for a starting device, etc., and can also be used as a water supply tank.

There are still some defects in passively controlled tuned mass dampers: the wind-induced and earthquake-induced loads on the building structure come from different directions, and the TMD of the existing track support system can only move in a relatively fixed direction horizontally, and cannot respond to loads in different directions. Vibration control for wind-induced earthquakes.

Contents of the invention

The purpose of the present invention is to combine TMD and TLD to complement each other to provide a tuned mass damper with obvious energy dissipation capacity, simpler form and controllable wind vibration and earthquake responses in different directions.

The technical scheme of the universal swing track supported tuned mass damper of the present invention is as follows:

The structure includes a support, a hemispherical mass block, a cable-stayed spring and a damper; the support is in the shape of a cylinder and the upper part of the support is provided with an arc-shaped concave surface, and a heavy-duty universal ball is arranged on the arc-shaped concave surface. The bottom of the hemispherical mass block is placed in the arc-shaped concave surface, and the surroundings of the upper part of the hemispherical mass block are respectively connected to the support through oblique tension springs and dampers. A high-damping rubber buffer layer is provided on the arc-shaped concave surface of the support, and the heavy-duty universal ball is fixed on the high-damping rubber buffer layer.

In order to enable the hemispherical mass to swing better, there are multiple heavy-duty universal balls arranged radially from the center of the arc-shaped concave surface to the surroundings.

In order to prevent the hemispherical mass from swinging too much and falling off the track to damage the structure, a limiting device is provided on the support.

In order to facilitate installation and use, the bottom of the heavy-duty universal ball is provided with a screw, and the heavy-duty universal ball is embedded in the high-damping rubber buffer layer through the screw; the bottom of the support is provided with a fixed bottom plate, and the fixed bottom plate is provided screw holes.

In order to facilitate the swing of the hemispherical mass, the arc of the arc-shaped concave surface is consistent with the hemispherical arc of the hemispherical mass.

In order to reduce costs and facilitate use, the support is a solid structure of steel shell concrete, and the hemispherical mass block is a solid structure of all steel or steel shell concrete.

In order to better control the vibration of the structure from different directions, the upper part of the hemispherical mass block is connected to the support through four oblique springs, the angle between two adjacent oblique springs is 90°, and every two There is a damper between the cable-stayed springs, the angle between two adjacent dampers is 90°, and the angle between the adjacent cable-stayed springs and the damper is 45°; the connection of the dampers is a ball joint Hinged, torsion at a certain angle can occur, and the damper is a viscous fluid damper.

Compared with the prior art, the present invention has the following advantages:

The invention can control the structural responses of wind vibration and earthquake in different directions, and the hemispherical mass block can swing universally under the action of wind vibration and earthquake, and can make the inclined spring and the viscous fluid damper move simultaneously to dissipate energy when swinging.

The invention can adjust the stiffness of the corresponding cable-stayed spring according to the natural vibration period of the structure, and can also adjust the height of the contact point between the hemispherical mass block and the heavy-duty universal ball track to adjust the frequency to be suitable for different frequencies of different high-rise structures, and has the function of automatic reset .

In the present invention, a buffer layer is arranged under the heavy-duty universal ball track, which can effectively buffer the vertical impact force of the hemispherical mass block.

The whole device of the present invention has simple structure, high stability and durability, good energy consumption effect; sensitive passive response, good automatic activation performance, improves the use comfort of high-rise structures, and can provide good protection for high-rise buildings and towering structures effect.

Description of drawings

Fig. 1 is a three-dimensional schematic diagram of a tuned mass damper of the present invention;

Fig. 2 is a schematic diagram of a front elevation sectional view of a tuned mass damper of the present invention;

Fig. 3 is a three-dimensional schematic diagram of a heavy-duty universal ball in the present invention;

Fig. 4 is a schematic diagram of a cross-sectional view of a heavy-duty universal ball in the present invention;

Fig. 5 is a schematic diagram of the track arrangement of the heavy-duty universal ball of the present invention;

Fig. 6 is a schematic top view of the tuned mass damper of the present invention.

detailed description

The universal oscillating track supported tuned mass damper of the present invention will be further described in detail below with reference to the accompanying drawings.

As shown in Figures 1 to 6, the universal swing track supported tuning mass damper of the present invention includes a support 1, a hemispherical mass block 2, four oblique springs 3 and four viscous fluid dampers 4; The support 1 is cylindrical and has an arc-shaped concave surface on the upper part. The arc-shaped concave surface of the support 1 is provided with a high-damping rubber buffer layer 8, and a plurality of heavy-duty universal balls 6 are arranged on the high-damping rubber buffer layer 8. , the heavy-duty universal balls 6 are radially arranged from the center of the arc-shaped concave surface to the surroundings. The bottom of the hemispherical mass 2 is placed in an arc-shaped concave surface, the arc of the arc-shaped concave surface is consistent with the hemispherical arc of the hemispherical mass 2, and the upper part of the hemispherical mass 2 is connected to the support 1 by four cable-stayed springs 3 connected, the angle between two adjacent oblique springs 3 is 90°, and a viscous fluid damper 4 is arranged between every two oblique springs 3, and the clamp of two adjacent viscous fluid dampers 4 The angle is 90°, the included angle between the adjacent oblique spring 3 and the viscous fluid damper 4 is 45°, and the joint of the viscous fluid damper 4 is a ball joint, which can be twisted at a certain angle.

In addition, the support 1 is provided with a limit device 7, the bottom of the heavy-duty universal ball 6 is provided with a screw, and the heavy-duty universal ball 6 is embedded in the high-damping rubber buffer layer 8 through the screw; the bottom of the support 1 is provided with a fixed bottom plate 5 , the fixed bottom plate 5 is provided with screw holes 9, which can facilitate installation. The support 1 is a solid structure of steel shell concrete, and the hemispherical mass block 2 is a solid structure of all steel or steel shell concrete. The quality, material properties, and size of the mass block can be determined by the parameters of the high-rise structure such as the natural vibration period and mass of the structure. , and then customize the specifications and numbers of damper supports, oblique springs, viscous fluid dampers, and heavy-duty universal balls.

Since the hemispherical mass in the device can swing universally in the universal ball track, when wind vibrations and earthquakes act on high-rise structures, the hemispherical mass will oscillate, driving the inclined spring and viscous fluid damping during the swing It can effectively control the wind vibration and earthquake action in different directions. Adjusting the height of the contact point between the hemispherical mass block and the heavy-duty universal ball track and adjusting the spring stiffness can adjust the frequency to be suitable for different frequencies of different high-rise structures, and has wide applicability. The quality block is self-resetting, and when it swings, it will generate a restoring force opposite to the direction of motion, which increases the energy consumption capacity of the device.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the protection of the present invention. within range.

Claims (10)

1. The universal swing track supported tuning mass damper is characterized in that it includes a support (1), a hemispherical mass (2), a diagonal spring (3) and a damper (4); the support ( 1) It is cylindrical and the upper part of the support (1) is provided with an arc-shaped concave surface, and a heavy-duty universal ball (6) is arranged on the arc-shaped concave surface, and the bottom of the hemispherical mass block (2) is placed on a circular The center of the arc-shaped concave surface and the upper periphery of the hemispherical mass block (2) are respectively connected to the support (1) through a cable-stayed spring (3) and a damper (4). 2. The universal swing track supported tuning mass damper according to claim 1, characterized in that a high-damping rubber buffer layer (8) is provided on the arc-shaped concave surface of the support (1), and the The heavy universal ball (6) is fixed on the high damping rubber buffer layer (8). 3. The universal oscillating track supported tuning mass damper according to claim 2, characterized in that there are multiple heavy-duty universal balls (6) arranged radially from the center of the arc-shaped concave surface to the surroundings set up. 4. The universal swing track supported tuning mass damper according to claim 3, characterized in that, the support (1) is provided with a limiting device (7). 5. The universal swing track supported tuning mass damper according to claim 4, characterized in that, the bottom of the heavy universal ball (6) is provided with a screw, and the heavy universal ball (6) passes through the screw Embedded in the high damping rubber buffer layer (8). 6. The universal swing track supported tuning mass damper according to claim 5, characterized in that, the bottom of the support (1) is provided with a fixed base plate (5), and the fixed base plate (5) is provided with There are screw holes (9). 7. The universal oscillating track supported tuning mass damper according to claim 6, characterized in that, the arc of the arc-shaped concave surface is consistent with the hemispherical arc of the hemispherical mass (2). 8. The universal swing track supported tuning mass damper according to claim 7, characterized in that, the support (1) is a solid structure of steel shell concrete, and the hemispherical mass (2) is all steel Or steel shell concrete solid structure. 9. The universal swing track supported tuning mass damper according to claim 8, characterized in that the upper part of the hemispherical mass (2) is connected to the support (1) by four cable-stayed springs (3) connected, the angle between two adjacent oblique springs (3) is 90°, and there is a damper (4) between every two oblique springs (3), and two adjacent dampers (4) The angle between the adjacent oblique springs (3) and the damper (4) is 90°, and the angle between the adjacent oblique spring (3) and the damper (4) is 45°; the connection of the damper (4) is a ball joint, which can be twisted at a certain angle . 10. The universal oscillating track supported tuned mass damper according to any one of claims 1 to 9, characterized in that the damper (4) is a viscous fluid damper.