CN1936209A - Large-span structure multi-dimension isolation shock-damping rack - Google Patents

Abstract

The multi-dimensional damping support for long-span structures is a multi-dimensional damping support for large-span structures in anti-seismic (vibration) engineering. Seat core pad 3, vertical energy dissipator 4, pre-embedded bolt 5, and steel plate 7 under the energy dissipating support. The steel plate on the energy dissipating support and the energy dissipating core pad are free to rest, and the upper end of the vertical damper is welded to the sliding steel plate. The lower end is welded with the lower steel plate of the energy-dissipating support, and the sliding steel plate can slide in the channel on the steel plate on the energy-dissipating support. The invention has the advantages of simple structure, good energy consumption effect, low cost and convenient construction. It can simultaneously isolate vibrations horizontally and vertically. It will not be damaged under external excitation, and isolate or consume vibration overturning moment, local vibration bending moment and node vibration bending moment. It can be widely used in the vibration isolation and absorption of bearings of long-span grid structures and long-span bridge structures.

Description

Multi-dimensional shock-absorbing bearings for long-span structures

technical field

The invention relates to a support for multi-dimensional vibration isolation and absorption of long-span structures, and belongs to the technical field of anti-seismic load control devices for building structures.

Background technique

Earthquake force and wind vibration force are the main control loads borne by building structures, and they are also the main factors leading to the damage and collapse of building structures. Long-span structures are generally landmark buildings and important buildings. The quality of their seismic performance is directly related to the safety of huge people's lives and national economic property. Accurately understand the response of structures under earthquakes and implement reliable monitoring of them. Earthquake protection measures are very important. Structural vibration control is a new type of anti-seismic method, that is, the control structure and the structure jointly bear the earthquake (wind vibration) action, store and consume the seismic (wind vibration) energy together, so as to coordinate and reduce the response of the structure. The seismic isolation devices currently researched for earthquake development only play the role of horizontal isolation, but cannot simultaneously isolate the horizontal and vertical; at the same time, the existing seismic isolation The bottom is prone to damage and lacks protection measures. A large number of actual earthquake damages show that vertical earthquake (wind suction) is a very important external excitation for long-span structures.

Contents of the invention

Technical problem: The purpose of this invention is to develop a low-cost, reliable performance, and convenient construction of a multi-dimensional isolation and shock-absorbing bearing with a long-span structure. The bearing can simultaneously isolate horizontal and vertical earthquakes, and has a horizontal limit Function, while isolating earthquakes, it can also dissipate vibration energy, can protect the isolation device from being damaged under large external excitation, and can isolate or consume local vibration bending moments and node vibration bending moments.

Technical solution: The long-span structure multi-dimensional shock-absorbing support of the present invention is composed of the upper steel plate of the energy-dissipating support, the sliding steel plate, the core pad of the energy-dissipating support, the vertical damper, the embedded bolts, the lower steel plate of the energy-dissipating support and the horizontal Composition of limit steel plates; the upper steel plate of the energy dissipation support rests on the core pad of the energy dissipation support, and the core pad of the energy dissipation support rests on the steel plate under the energy dissipation support; there are two vertical dampers, which are respectively located in the energy dissipation On both sides of the support core pad, between the upper steel plate of the energy-dissipating support and the lower steel plate of the energy-dissipating support, the upper end of the damping steel plate in the middle of the vertical damper is fixed to the sliding steel plate, and the lower end of the vertical damper is connected to the energy-dissipating support The lower steel plate is fixed, and the sliding steel plate can slide in the channel of the steel plate on the energy dissipation support; the horizontal limit steel plate is respectively located on the other two sides of the core pad of the energy dissipation support, and limits the sliding of the support in the direction of the main span. The core pad of the energy-dissipating support is a viscoelastic support, or a lead core viscoelastic support, or a rubber support, or a lead core rubber support. The vertical damper is a viscoelastic damper, or a viscous fluid damper, or a metal damper, or a friction damper, or an intelligent damper.

When external excitation causes horizontal deformation, for the main span direction, the energy-dissipating support and the vertical damper deform in the horizontal direction to dissipate the input vibration energy, and the two ends of the vertical damper are provided with limit steel plates, which can It acts as a limit function in the horizontal direction; for the short-span direction, because the middle steel plate of the vertical damper has a certain movement space between the channels of the upper steel plate, the energy-dissipating support can also be deformed in the short-span direction, and the energy consumption Dissipate vibration energy; when the external excitation causes vertical deformation, for the downward movement, the compaction of the support energy-dissipating material layer produces extrusion deformation to dissipate a small part of the energy; for the upward movement, the energy-dissipating support The upper steel plate is separated from the core pad of the energy-dissipating support. At this time, the vertical damper deforms and dissipates vibration energy, thus forming a vertical shock-absorbing system; whether it is horizontal or vertical, the energy-dissipating support is equivalent Based on a weak layer with low stiffness and high damping, it can effectively isolate the transmission of horizontal or vertical vibration energy, thereby effectively playing the role of horizontal and vertical shock isolation; because the steel plate on the energy dissipation support and the energy dissipation support The core pad of the seat rests freely, and the pulling force will not be transmitted to the energy-dissipating support, thereby protecting the energy-dissipating support from being damaged, and changing the characteristics of the traditional support that is easy to be damaged. When subjected to vibration overturning moment and nodal vibration bending moment, the vertical damper deforms and protects the energy dissipation support so as to prevent the tension side of the energy dissipation support from being damaged.

It can be seen from this that the support can not only provide horizontal shock isolation, but also vertical shock isolation; it can not only isolate shock but also consume energy; it can protect the energy-consuming support from damage; Destructive effects of small vibration overturning moments or nodal vibration bending moments.

Beneficial effects: the long-span structure multi-dimensional shock-absorbing support of the present invention has the advantages of simple structure, good energy dissipation effect, low cost, and convenient construction. It can not only achieve horizontal shock isolation, but also vertical shock isolation It can not only isolate the vibration, but also consume energy; it can protect the vibration isolation device from being damaged under large external excitation, and can isolate or consume vibration overturning moment, local vibration bending moment and node vibration bending moment.

Description of drawings

Fig. 1 is the elevation structure schematic diagram of the present invention.

Fig. 2 is a schematic view of the planar section structure of the present invention.

In the above figure, there are: additional steel plate 1, steel plate 2 on energy dissipation support, channel 21, core pad 3 of energy dissipation support, vertical energy dissipation device 4, damping steel plate 41, embedded bolt 5, weld seam 6, The lower steel plate 7 of the energy-dissipating support, the lower structure 8, the upper structure 9, and the horizontal limit steel plate 10.

Detailed ways

The long-span structure multi-dimensional shock-absorbing support of the present invention is mainly composed of the upper steel plate 2 of the energy-dissipating support, the sliding steel plate 1, the core pad of the energy-dissipating support 3, the vertical damper 4, the embedded bolt 5, the lower energy-dissipating support The steel plate 7 and the horizontal limit steel plate are composed of 10 components; the upper steel plate 2 of the energy dissipation support rests on the core pad 3 of the energy dissipation support, and the core pad 3 of the energy dissipation support rests on the steel plate 7 of the lower energy dissipation support; the vertical damping There are two devices 4, which are respectively located on both sides of the core pad 3 of the energy-dissipating support, between the upper steel plate 2 of the energy-dissipating support and the lower steel plate 7 of the energy-dissipating support, and the upper end of the damping steel plate 41 in the middle of the vertical damper 4 is connected to the The sliding steel plate 1 is fixedly connected, the lower end of the vertical damper 4 is fixedly connected to the lower steel plate 7 of the energy dissipation support, and the sliding steel plate 1 can slide in the channel 21 of the upper steel plate 2 of the energy dissipation support; the horizontal limit steel plates 10 respectively correspond to Located on the other two sides of the core pad 3 of the energy-dissipating support, it limits the sliding of the support in the direction of the main span. The core pad 3 of the energy-dissipating support is a viscoelastic support, or a lead core viscoelastic support, or a rubber support, or a lead core rubber support. The vertical damper 4 is a viscoelastic damper, or a viscous fluid damper, or a metal damper, or a friction damper, or an intelligent damper.

The core pad 3 of the energy-dissipating support and the upper steel plate 2 of the energy-dissipating support are free to rest. Because the middle steel plate of the vertical damper has a certain movement space between the channels of the upper steel plate, the short-span direction of the energy-dissipating support can also occur. The deformation of the vertical damper is symmetrically arranged in two rows along the long side of the energy-dissipating support. The upper steel plate of the energy dissipation support is connected with the upper structure through bolts or welding, and the lower steel plate of the energy dissipation support is connected with the lower structure through embedded bolts or welding.

Claims (3)

1. A long-span structure multi-dimensional shock-absorbing support, characterized in that the support is composed of a steel plate (2) on the energy-dissipating support, a sliding steel plate (1), a core pad of the energy-dissipating support (3), a vertical damping device (4), pre-embedded bolts (5), energy dissipation support lower steel plate (7) and horizontal limit steel plate (10); the energy dissipation support upper steel plate (2) rests on the energy dissipation support core pad ( 3), the core pad (3) of the energy-dissipating support rests on the lower steel plate (7) of the energy-dissipating support; there are two vertical dampers (4), corresponding to the core pads (3) of the energy-dissipating support On both sides, between the upper steel plate (2) of the energy-dissipating support and the lower steel plate (7) of the energy-dissipating support, the upper end of the damping steel plate (41) in the middle of the vertical damper (4) is fixedly connected with the sliding steel plate (1), and the vertical The lower end of the damper (4) is affixed to the lower steel plate (7) of the energy dissipation support, and the sliding steel plate (1) can slide in the channel (21) of the upper steel plate (2) of the energy dissipation support; the horizontal limit steel plate (10) respectively correspond to the other two sides of the core pad (3) of the energy-dissipating support, and limit the sliding of the support in the direction of the main span. 2. The long-span structure multi-dimensional shock-absorbing support according to claim 1, characterized in that the energy-dissipating support (3) is a viscoelastic support or a lead core viscoelastic support or a rubber support or a lead core rubber support seat. 3. The long-span structure multi-dimensional shock-absorbing support according to claim 1, characterized in that the vertical damper (4) is a viscoelastic damper or a viscous fluid damper or a metal damper or a friction damper or an intelligent damper. damper.

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