CN219710631U - Shock insulation structure adopting friction pendulum support - Google Patents

Abstract

A seismic isolation structure using a friction pendulum support, which relates to the technical field of seismic isolation devices and includes a complex friction pendulum support. The complex friction pendulum support includes a lower support plate, a lower friction plate, a spherical crown, and an upper friction plate. , the upper support plate and the limit ring are respectively equipped with inner crawler dampers and outer crawler dampers on both sides of the compound friction pendulum support. The inner crawler damper or outer crawler damper Both ends of the damper are connected to the same side ends of the lower support plate and the upper support plate respectively. This new model has good self-healing and anti-torsion capabilities, high bearing capacity, low cost, simple construction, and more comprehensive seismic isolation capabilities. By setting up double crawler dampers, it can deal with small earthquakes and Moderate and major earthquakes work in stages to provide better isolation protection for buildings.

Description

A seismic isolation structure using friction pendulum bearings

Technical field

The invention relates to the technical field of seismic isolation devices, and specifically relates to a seismic isolation structure using a friction pendulum support.

Background technique

In the process of fighting earthquakes, our country has formed an anti-seismic design idea with the core goals of "not damaged by small earthquakes", "repairable by moderate earthquakes", and "not collapsed by large earthquakes". The traditional anti-seismic idea is essentially to resist earthquake effects by increasing the stiffness and strength of the building itself. In order to make up for the shortcomings and shortcomings of traditional anti-seismic methods, the purpose of extending the period and consuming earthquake energy is to add shock-absorbing and isolation devices to the building. To better reduce the seismic response and reduce the disaster effects caused by earthquakes, isolation technology is more effective than shock absorption technology in reducing structural deformation of upper buildings and ensuring the safety of internal non-structural components.

In order for prefabricated buildings to truly exert the seismic isolation effect of the seismic isolation device during use, not only the seismic isolation design of the building structure must be carried out, but also the seismic isolation structural measures must be controlled so that the purpose of the seismic isolation design can be better realized , further improving the safety of building structures during earthquakes.

The traditional isolation method is to arrange rubber isolation bearings in the isolation layer. Because they have small horizontal stiffness, good hysteretic performance, and can produce large horizontal displacements when an earthquake strikes, they can Reduce the horizontal stiffness of the entire structural system and extend the basic period of the structure. However, rubber isolation bearings also have some shortcomings during use, such as lower bearing capacity, shorter service life, and poor self-resetting ability. The friction pendulum isolation bearing uses the sliding friction damping between the spherical crown and the sliding surface to consume vibration energy, and can withstand a large vertical bearing capacity. The existing friction pendulum isolation bearing is in the traditional friction pendulum Many improvements have been made on the basis of the support: a metal damper is arranged between the upper support plate and the lower support plate of the friction pendulum support; based on the principle of electromagnetism, the slider moves to cut the magnetic field lines to generate eddy currents. , the resulting magnetic damping and the Coulomb friction damping generated by the friction plate jointly consume the energy of the movement of the support; using the characteristics of super elastic SMA with good self-returning ability, SMA cables are arranged around the support to improve the strength of the support. Self-resetting capability; however, these methods of using electromagnetism to increase damping and SMA to improve self-resetting levels cost a lot in actual application and have poor anti-overturning capabilities. Most metal dampers are based on yield energy dissipation during moderate or large earthquakes. Design, the metal damper on the friction pendulum support does not have the ability to dissipate energy under small earthquakes.

Utility model content

The new model discloses a seismic isolation structure using a friction pendulum bearing. The device has good self-recovery and anti-torsion capabilities, high bearing capacity, low cost, simple construction, and more comprehensive seismic isolation capabilities. Equipped with double crawler dampers, they can act in stages against small, medium and large earthquakes under earthquake action, thereby providing better isolation protection for buildings.

In order to achieve the above purpose, the new technical solution is:

A seismic isolation structure using a friction pendulum support, including a complex friction pendulum support. The complex friction pendulum support includes a lower support plate, a lower friction plate, a spherical crown, an upper friction plate, an upper support plate, and a limiter. The position ring is equipped with an inner crawler damper and an outer crawler damper on both sides of the compound friction pendulum support. The two ends of the inner crawler damper or the outer crawler damper are respectively connected to The lower support plate and the upper support plate are connected at the same side ends.

Preferably, the opposite ends of the lower support plate and the upper support plate are integrally formed with boss structures, and the limit ring is coaxially integrally formed on the inner end surfaces of the two boss structures. The outer surface of the upper or lower boss structure where the inner side of the bit ring is located is respectively provided with an upper friction plate and a lower friction plate, and the spherical crown is connected between the upper friction plate and the lower friction plate.

Preferably, the two ends of the inner crawler damper are respectively welded to the inner end surfaces of the upper and lower boss structures located outside the limiting ring.

Preferably, the two ends of the outer crawler damper are respectively welded to the opposite surfaces of the upper support plate and the lower support plate located outside the boss structure.

Preferably, ultra-high molecular polyethylene friction materials are respectively coated between the lower support plate and the lower friction plate and between the upper support plate and the upper friction plate.

Preferably, the structure of the inner crawler damper and the outer crawler damper is such that the inner crawler damper yields and consumes energy under the action of a small earthquake, and the outer crawler damper maintains an elastic state, and the inner crawler damper remains elastic under the action of a moderate or large earthquake. The lower outer crawler damper and the inner crawler damper yield energy dissipation together.

Preferably, the structure of the inner crawler damper and the outer crawler damper is such that: under the action of a small earthquake, the inner crawler damper and the outer crawler damper maintain an elastic state; under the action of a moderate earthquake, the inner crawler damper The damper yields and consumes energy, and the outer crawler damper maintains an elastic state; under the action of a large earthquake, the outer crawler damper and the inner crawler damper jointly yield and consume energy.

The beneficial effects of this new type of earthquake isolation structure using friction pendulum bearings are:

This new type has good self-healing and anti-torsion capabilities, high bearing capacity, low cost, simple construction, and more comprehensive earthquake isolation capabilities. By setting up double crawler dampers, they can function in stages under earthquakes. By adjusting the size parameters of the inner and outer crawler dampers to have different yield displacements, the inner and outer crawler dampers have different characteristics under different earthquake conditions. The yield characteristics of friction pendulum isolation bearings have different energy dissipation capabilities under different horizontal displacements.

Description of drawings

Figure 1. Schematic cross-sectional structure diagram of the new type;

Figure 2. Top view of this new model after installing the inner crawler damper;

Figure 3. Top view of this new model after installing external crawler damper;

Figure 4. Schematic diagram of the installation method when using this new model;

1. Lower bearing plate; 2. Lower friction plate; 3. Spherical crown; 4. Upper friction plate; 5. Upper bearing plate; 6. Limiting ring; 7. Lower pier; 8. Temporary steel plate; 9. Lower embedded sleeve; 10. Seismic isolation structure using friction pendulum bearing; 11. Upper embedded sleeve; 12. Bolt; 13. Inner crawler damper; 14. External crawler damper.

Detailed ways

The following descriptions are only preferred embodiments of the present invention and are not used to limit the scope of protection of the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in within the protection scope of this new model.

Example 1

A seismic isolation structure using a friction pendulum support, as shown in Figure 1-4, including a complex friction pendulum support, which includes a lower support plate 1, a lower friction plate 2, and a spherical crown 3 , upper friction plate 4, upper support plate 5, limit ring 6, are equipped with inner and outer crawler dampers 13 and outer crawler dampers 14 on both sides of the compound friction pendulum support. The two ends of the inner crawler damper 13 or the outer crawler damper 14 are connected to the same side ends of the lower support plate 1 and the upper support plate 5 respectively.

Example 2

Based on Embodiment 1, this embodiment is improved as follows:

As shown in Figure 1, the opposite ends of the lower support plate 1 and the upper support plate 5 are integrally formed with boss structures (not marked in the figure), and the limiting ring 6 is coaxially integrally formed on the 2 The inner end surface of a boss structure, the outer surface of the upper or lower boss structure where the inner side of the limit ring 6 is located is respectively provided with an upper friction plate 4 and a lower friction plate 2, and the spherical crown 3 is connected to the upper friction plate 4 and lower friction plate 2.

Example 3

Based on Embodiment 2, this embodiment is improved as follows:

As shown in Figure 1, the two ends of the inner crawler damper 13 are respectively welded to the inner end surfaces of the upper and lower boss structures where the outside of the limiting ring 6 is located.

As shown in Figure 1, the two ends of the outer crawler damper 14 are respectively welded to the opposite surfaces of the upper support plate and the lower support plate located outside the boss structure.

Example 4

Based on Embodiment 3, this embodiment is improved as follows:

As shown in Figure 1, ultra-high molecular polyethylene friction material is coated between the lower support plate 1 and the lower friction plate 2, and between the upper support plate 5 and the upper friction plate 4 to improve the wear resistance.

Example 5

Based on Embodiment 4, this embodiment is improved as follows:

As shown in Figure 1-4, the structures of the inner crawler damper 13 and the outer crawler damper 14 are satisfied: the inner crawler damper yields and consumes energy under the action of small earthquakes, and the outer crawler damper maintains an elastic state. , the outer crawler damper and the inner crawler damper jointly yield and dissipate energy under the action of moderate or large earthquakes.

Example 6

Based on Embodiment 4, this embodiment is improved as follows:

As shown in Figures 1-4, the structure of the inner crawler damper 13 and the outer crawler damper 14 is satisfactory: under the action of a small earthquake, the inner crawler damper and the outer crawler damper maintain an elastic state; Under the action of a large earthquake, the inner crawler damper yields and consumes energy, while the outer crawler damper maintains an elastic state; under the action of a large earthquake, the outer crawler damper and the inner crawler damper yield and consume energy together.

Example 7

Based on Embodiments 5 and 6, this embodiment is improved as follows:

The installation process of a seismic isolation structure using friction pendulum bearings is as follows: as shown in Figure 4, the installation of the steel frame of the lower buttress 7, the installation of the temporary steel plate 8, the installation of the lower embedded sleeve 9, and the lower buttress template Installation and concrete pouring, hoisting of the seismic isolation structure 10 using friction pendulum bearings, installation of the embedded sleeve 11, installation of the upper buttress formwork, installation of the upper buttress and the steel frame of the transfer layer, concrete pouring of the upper buttress using friction Bolts 12 are used to connect the seismic isolation structure of the pendulum bearing and the piers.

This new type of seismic isolation structure uses a friction pendulum support. By adjusting the size parameters of the inner crawler damper 13 and the outer crawler damper 14 to have different yield displacements, the inner crawler damping can be achieved under small earthquakes. The outer crawler damper yields, and the outer crawler damper remains in an elastic state. Under the action of a moderate or large earthquake, the outer crawler damper yields and consumes energy together with the inner crawler damper, thereby achieving the goal of graded yield energy dissipation; it can also be designed through the size Parameters: During small earthquakes, both the inner and outer crawler dampers are in an elastic state. Under moderate earthquakes, the inner crawler dampers yield, and the outer crawler dampers remain elastic. Under large earthquakes, the outer crawler dampers yield, and the inner crawler dampers yield. The crawler dampers jointly dissipate energy. This new type of damper exhibits rolling bending deformation when deformed, can achieve multi-section yielding, exhibits strong deformation performance and fatigue resistance, effectively enhances the energy dissipation performance of the damper at different design displacements, and enables the friction pendulum isolation bearing to There are different improvements in energy consumption capabilities under different horizontal displacements. In addition, the application of double crawler dampers improves the horizontal overturning resistance and vertical pull-out resistance of the friction pendulum isolation bearing, prevents the separation of the bearing plate and the spherical crown during the sliding process, and further improves the device's durability. Stability; the setting of double crawler dampers has a certain protective effect on the dampers and supports.

Claims (7)

1. A seismic isolation structure using a friction pendulum support, including a complex friction pendulum support. The complex friction pendulum support includes a lower support plate, a lower friction plate, a spherical crown, an upper friction plate, and an upper support plate. , limit ring, which is characterized by: an inner crawler type damper and an outer crawler type damper respectively equipped with inner and outer outer crawler dampers on both sides of the compound friction pendulum support, the inner crawler type damper or the outer crawler type damper The two ends of the device are respectively connected to the same side ends of the lower support plate and the upper support plate. 2. A seismic isolation structure using friction pendulum supports as claimed in claim 1, characterized in that: the opposite ends of the lower support plate and the upper support plate are integrally formed with boss structures, and the The limit ring is coaxially formed on the inner end surface of the two boss structures. The outer surface of the upper or lower boss structure where the inner side of the limit ring is located is respectively equipped with an upper friction plate and a lower friction plate. The ball The crown is connected between the upper friction plate and the lower friction plate. 3. A seismic isolation structure using a friction pendulum support as claimed in claim 2, characterized by: the two ends of the inner crawler damper are respectively connected to the upper and lower boss structures located outside the limit ring. Inner end face welding. 4. A seismic isolation structure using a friction pendulum support as claimed in claim 3, characterized in that: the two ends of the outer crawler damper are respectively connected to the upper support plate and the lower support plate located outside the boss structure. The opposite sides of the support plate are welded. 5. A seismic isolation structure using a friction pendulum support as claimed in claim 4, characterized in that: super-resistant steel is coated between the lower support plate and the lower friction plate, and between the upper support plate and the upper friction plate. High molecular polyethylene friction material. 6. A seismic isolation structure using a friction pendulum support as claimed in claim 5, characterized in that: the structures of the inner crawler damper and the outer crawler damper satisfy: the inner crawler under the action of small earthquakes The outer crawler damper yields and consumes energy, and the outer crawler damper remains in an elastic state. Under moderate or large earthquakes, the outer crawler damper and the inner crawler damper yield and consume energy together. 7. A seismic isolation structure using a friction pendulum support as claimed in claim 5, characterized in that the structure of the inner crawler damper and the outer crawler damper is such that under the action of a small earthquake, the inner The crawler damper and the outer crawler damper maintain an elastic state; under the action of a moderate earthquake, the inner crawler damper yields and dissipates energy, and the outer crawler damper maintains an elastic state; under the action of a large earthquake, the outer crawler damper and the inner crawler The dampers jointly yield and dissipate energy.