CN221119387U - Automatic lead core rubber composite shock insulation support resets - Google Patents

Abstract

The utility model relates to the technical field of seismic isolation bearings, and specifically to a composite seismic isolation bearing composed of a lead rubber seismic isolation bearing and an upper main sliding surface friction pendulum seismic isolation bearing with an automatic reset function. It includes an upper connecting plate, a lower connecting plate, a friction pendulum seismic isolation unit between the upper and lower connecting plates, and four lead rubber seismic isolation bearings arranged around the friction pendulum seismic isolation unit, and the upper end of the lead rubber seismic isolation bearing is detachably fixedly connected to the upper connecting plate, and the lower end is detachably fixedly connected to the lower connecting plate. The upper connecting plate is provided with bolt holes, which can be connected to the upper structure of the building by bolts, and the lower connecting plate is provided with bolt holes, which can be connected to the lower structure of the building by bolts. The composite seismic isolation bearing combines the advantages of the lead rubber seismic isolation bearing and the upper main sliding surface friction pendulum seismic isolation bearing, improves the performance of the seismic isolation bearing, and realizes the automatic reset of the lead rubber seismic isolation bearing.

Description

An automatic reset lead core rubber composite seismic isolation bearing

Technical Field

The utility model relates to the technical field of seismic isolation bearings, in particular to a composite seismic isolation bearing with an automatic resetting function, which is composed of a lead rubber seismic isolation bearing and an upper main sliding surface friction pendulum type seismic isolation bearing.

Background technique

In construction and bridge engineering, seismic isolation bearings with flexible deformation and damping performance are set between the foundation and the superstructure of the building to extend the natural vibration period of the structure, absorb seismic energy, and reduce the seismic response of the superstructure, so as to achieve the purpose of reducing earthquake damage. Seismic isolation bearing technology has been widely recognized and applied in the engineering and academic circles for its significant shock absorption effect and good economic applicability.

The friction pendulum isolation bearing is a relatively mature sliding isolation bearing with stable hysteresis performance and automatic reset characteristics. The main principle of seismic isolation and energy dissipation of this type of isolation bearing is: when the seismic force on the friction pendulum isolation bearing is small, it relies on the static friction between the upper deadweight and the bridge to fully ensure the stability of the bridge. When the seismic force is large, the bearing slides according to a certain period, so that the seismic force on the upper structure of the bridge is no longer transmitted to the lower structure. By designing the sliding surface, the vibration period of the bridge structure is extended, so that the amplification effect caused by the seismic effect on the bridge structure is greatly reduced. The friction between the bearing sliding surface and the slider is used to achieve seismic isolation and energy dissipation, and the stiffness and period control can be achieved by selecting a suitable sliding surface curve radius. At the same time, the circular arc sliding surface of the friction pendulum isolation can effectively control the displacement of the friction pendulum isolation bearing, so that it can return to its original position after being affected by an earthquake.

The rubber isolation bearing is made of multiple layers of steel plates and rubber alternately stacked together. The steel plate is used as the stiffening material of the rubber bearing, which changes the characteristic of the low vertical stiffness of the rubber body, so that it can not only reduce the horizontal earthquake effect, but also withstand large vertical loads. Since rubber is an elastic body with insufficient energy dissipation, a lead core is added to the bearing. The lead-core rubber isolation bearing can not only bear the vertical load of the entire superstructure and extend the structural period, but also provide a certain amount of damping, so that the seismic force of the lower structure is redistributed, and the displacement of the isolation layer will not be large, which has a good isolation effect. At the same time, the lead-core rubber isolation bearing has a certain initial horizontal stiffness, which can withstand the effects of load and braking load.

At present, due to the static friction between the laminated rubber and the steel plate, the lead rubber isolation bearing cannot be restored to its original position after an earthquake by relying solely on the properties of the rubber itself. The unreset lead rubber isolation bearing cannot fully exert its function when resisting the earthquake, and the deformed lead rubber isolation bearing also has safety hazards in the vertical bearing capacity. Therefore, starting from optimizing the reset device of the lead rubber isolation bearing, by modifying the inside of the lead rubber isolation bearing and adding an automatically reset friction pendulum isolation bearing, the advantages of the friction pendulum isolation bearing can be fully utilized without changing the original function of the lead rubber isolation bearing, and the lead rubber isolation bearing can be automatically reset.

Utility Model Content

In order to solve the problem that the existing lead rubber isolation bearings cannot be automatically reset and have potential safety hazards, the utility model provides an automatic reset lead rubber composite isolation bearing, which has the advantages of automatic reset, improved seismic isolation performance and protection of buildings.

To achieve the above-mentioned purpose, the utility model provides the following technical solutions.

The utility model provides an automatic reset lead rubber composite seismic isolation bearing, comprising an upper connecting plate, a lower connecting plate, a friction pendulum seismic isolation unit between the upper and lower connecting plates, and four lead rubber seismic isolation bearings arranged around the friction pendulum seismic isolation unit, wherein the upper end of the lead rubber seismic isolation bearing is detachably fixedly connected to the upper connecting plate, and the lower end is detachably fixedly connected to the lower connecting plate. The upper connecting plate is provided with bolt holes, and can be connected to the upper structure of the building by bolt connection, and the lower connecting plate is provided with bolt holes, and can be connected to the lower structure of the building by bolt connection.

The lead core rubber seismic isolation bearing includes an upper fixing plate, a lower fixing plate, an elastomer formed by a lead core, a steel plate layer and a rubber layer, and one end of the elastomer is vulcanized and bonded to the upper fixing plate, the other end of the elastomer is vulcanized and bonded to the lower fixing plate, and the outermost rubber protective layer.

The number of the lead rubber isolation bearings is four, and they are evenly distributed in a cross-symmetrical manner along the friction pendulum isolation bearing.

The friction pendulum seismic isolation unit adopts an upper main sliding surface structure, including an upper steel groove, a lower steel groove, and a double spherical lining body sandwiched between the upper and lower steel grooves, and the double spherical lining body can slide in the concave spherical surface of the upper steel groove.

The friction pendulum seismic isolation unit also includes an upper limit portion extending downward along the edge of the above-mentioned upper connecting plate, and the upper limit portion is arranged around the double spherical lining between the upper and lower steel grooves; and the friction pendulum seismic isolation unit also includes a lower limit portion extending upward from the edge of the above-mentioned lower connecting plate, and the lower limit portion is arranged closely against the double spherical lining between the upper and lower steel grooves.

The working principle and basic working process of the automatic reset lead-rubber composite isolation bearing are as follows: under normal use, the friction pendulum isolation unit and the lead-rubber isolation bearings surrounding it jointly provide vertical bearing for the upper structure and provide stable support for the upper structure; when an earthquake occurs, the bearing as a whole undergoes repeated lateral deformation, extending the period of the upper structure to achieve isolation, and at the same time, in this process, the friction pendulum isolation unit consumes the energy brought by the vibration through the friction generated between the sliding surface of the bearing and the slider and the damping provided by the lead-rubber isolation bearing to achieve shock absorption. When the earthquake stops, the displacement stops first due to the relatively large damping of the lead core, rubber, and steel plate, and the bearing cannot return to its original shape due to the large static friction between the rubber and the steel plate. At this time, the double spherical lining of the friction pendulum isolation unit still moves in the upper steel groove due to its own low damping, consuming its own kinetic energy to offset the static friction between the rubber and the steel plate to achieve bearing reset. When the earthquake intensity is too large, the relative movement of the upper and lower steel troughs will jam the double spherical lining, increase the lateral stiffness, prevent brittle failure of the bearings, and thus protect the building.

Compared with the prior art, the beneficial effects of the utility model are as follows.

1. The composite seismic isolation bearing combines the advantages of the lead rubber seismic isolation bearing and the upper main sliding surface friction pendulum seismic isolation bearing, improves the performance of the seismic isolation bearing, and realizes the automatic resetting of the lead rubber seismic isolation bearing, saving the manpower and material costs of manually resetting the bearing.

2. By arranging an upper connecting plate, a lower connecting plate, a friction pendulum isolation unit and four lead rubber isolation bearings, wherein the friction pendulum isolation unit and the lead rubber isolation bearing are both clamped between the upper connecting plate and the lower connecting plate, and the upper end of the lead rubber isolation bearing is detachably fixedly connected to the upper connecting plate, and the lower end is detachably fixedly connected to the lower connecting plate.

3. In addition, when the lead rubber isolation bearing needs to be replaced, we can remove it from between the upper and lower connecting plates and replace it with a new lead rubber isolation bearing. By setting the lead rubber isolation bearing and the upper and lower connecting plates as a detachable fixed connection, construction workers can use lead rubber isolation bearings of different stiffness according to different superstructures to meet different support and deformation requirements. This approach greatly improves the versatility of the composite isolation bearing and greatly saves maintenance costs.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the specific implementation scheme of the present utility model, the drawings and specific implementation schemes required for use in the specific implementation scheme will be introduced below.

FIG1 is a schematic longitudinal section of an automatic reset lead-core rubber composite seismic isolation bearing provided by the utility model.

In Figure 1: 1-steel plate; 2-rubber layer; 3-lead core; 4-upper limit portion; 5-upper steel groove; 6-double spherical lining; 7-rubber protective layer; 8-lower steel groove; 9-lower limit portion; 10-upper connecting plate; 11-lower connecting plate; 12-upper fixing plate; 13-lower fixing plate.

FIG. 2 is a schematic cross-sectional view of the present invention.

In Figure 2: 2-rubber layer; 3-lead core; 6-double spherical lining; 7-rubber protective layer; 8-lower steel groove; 9-lower limit part; 11-lower connecting plate.

Detailed ways

In order to make the purpose, technical scheme and advantages of the implementation mode of the utility model clearer, the utility model will be described in detail below in conjunction with the drawings in the implementation mode of the utility model. The implementation mode is only used to explain the utility model, but it cannot be determined that the specific implementation of the utility model is limited to these descriptions. Any innovation that only adjusts the proportion or modifies the size without changing the function of the utility model should fall within the scope of the technical content provided by the utility model and fall within the scope of protection of the utility model.

Fig. 1 is a schematic longitudinal section of an automatic reset lead-core rubber composite seismic isolation bearing provided by the utility model. Fig. 2 is a schematic cross-sectional view of the utility model. As shown in Figs. 1 and 2, this example provides an automatic reset lead-core rubber composite seismic isolation bearing, including 1-steel plate; 2-rubber layer; 3-lead core; 4-upper limit portion; 5-upper steel groove; 6-double spherical lining; 7-rubber protective layer; 8-lower steel groove; 9-lower limit portion; 10-upper connecting plate; 11-lower connecting plate; 12-upper fixed plate; 13-lower fixed plate. The upper end of the lead-core rubber seismic isolation bearing is detachably fixedly connected to the upper connecting plate 10, and the lower end is detachably fixedly connected to the lower connecting plate 11.

The working principle and basic working process of this specific embodiment are as follows: under normal use, the friction pendulum isolation unit and the lead rubber isolation bearings surrounding it jointly provide vertical bearing for the upper structure and provide stable support for the upper structure; when an earthquake occurs, the bearing as a whole undergoes repeated lateral deformation, extending the period of the upper structure to achieve isolation, and at the same time, in this process, the friction pendulum isolation unit consumes the energy brought by the vibration through the friction generated between the sliding surface of the bearing and the double spherical lining 6 and the damping provided by the lead rubber bearing to achieve shock absorption. When the earthquake stops, the displacement stops first due to the relatively large damping of the lead core 3, rubber, and steel plate, and the bearing cannot return to its original shape due to the large static friction between the rubber and the steel plate. At this time, the double spherical lining 6 of the friction pendulum isolation unit still moves in the upper steel groove 5 due to its own low damping, consuming its own kinetic energy to offset the static friction between the rubber and the steel plate to achieve bearing resetting. When the earthquake intensity is too large, the upper steel trough 5 and the lower steel trough 8 will move relative to each other, which will jam the double spherical lining 6, thereby increasing the lateral stiffness and preventing the bearing from brittle failure, thereby protecting the building.

The composite seismic isolation bearing combines the advantages of the lead rubber seismic isolation bearing and the upper main sliding surface friction pendulum seismic isolation bearing, improves the performance of the seismic isolation bearing, and realizes the automatic resetting of the lead rubber seismic isolation bearing. During the relative sliding of the upper connecting plate 10 and the lower connecting plate 11, each lead rubber seismic isolation bearing has always reliably connected the upper and lower connecting plates together, preventing the upper connecting plate 10 from detaching or tilting from the lower connecting plate 11. This ensures the tensile continuity between them, allowing the force transmission path to be continuous, so as to ensure the reliability of the shock absorption and seismic isolation of the friction pendulum seismic isolation unit.

In addition, when the lead rubber isolation bearing needs to be replaced, we can remove it from between the upper connecting plate 10 and the lower connecting plate 11 and replace it with a new lead rubber isolation bearing. By setting the lead rubber isolation bearing and the upper connecting plate 10 and the lower connecting plate 11 as a detachable fixed connection, construction workers can use lead rubber isolation bearings of different stiffness according to different superstructures to meet different support and deformation requirements. This approach greatly improves the versatility of the composite isolation bearing and greatly saves maintenance costs.

As shown in Figures 1 and 2, in this example, the number of lead rubber isolation bearings is four, and specifically, the four lead rubber isolation bearings are evenly distributed along the friction pendulum isolation unit in a cross-symmetrical manner. This distribution not only has good bearing performance, but also can improve the overall stability of the bearing when an earthquake occurs.

The above description is only an explanation of the present utility model and not a limitation of the present utility model. Any improvements, modifications, equivalent substitutions, etc. made within the creative contribution and application principle of the present utility model shall be included in the protection scope of the present utility model.

Claims (8)

1. The utility model provides an automatic composite shock insulation support of lead core rubber resets, its characterized in that, include friction pendulum shock insulation unit and encircle a plurality of lead core rubber shock insulation supports that friction pendulum shock insulation unit arranged specifically include, steel sheet (1), rubber layer (2), lead core (3), go up spacing portion (4), go up steel groove (5), double sphere lining body (6), rubber protective layer (7), lower steel groove (8), lower spacing portion (9), upper connecting plate (10), lower connecting plate (11), upper fixed plate (12), lower fixed plate (13), and lead core rubber shock insulation support's upper end and upper connecting plate (10) can dismantle fixed connection, lower extreme and lower connecting plate (11) can dismantle fixed connection.

2. The automatic reset lead rubber composite shock insulation support according to claim 1, wherein: the lead rubber shock insulation support comprises an upper fixing plate (12), a lower fixing plate (13), and a rubber layer (2), a steel plate (1) and a lead (3) which are connected between the upper fixing plate (12) and the lower fixing plate (13), wherein the upper fixing plate (12) is connected with the upper connecting plate (10) through bolts, and the lower fixing plate (13) is connected with the lower connecting plate (11) through bolts.

3. The automatic resetting lead rubber composite shock insulation support according to claim 2, wherein the rubber layer, the steel plate layer and the lead core form an integrated elastic body, one end of the elastic body is vulcanized and bonded to the upper fixing plate (12), and the other end of the elastic body is vulcanized and bonded to the lower fixing plate (13).

4. The automatic reset lead rubber composite shock insulation support according to claim 1, wherein the number of the lead rubber shock insulation supports is four, and the four lead rubber shock insulation supports are distributed uniformly and crisscross along the friction pendulum shock insulation unit.

5. The automatic reset lead rubber composite shock insulation support according to claim 1, wherein the friction pendulum shock insulation unit comprises an upper steel groove (5), a lower steel groove (8) and a double-spherical lining body (6) clamped between the upper steel groove (5) and the lower steel groove (8), wherein the upper steel groove (5) is connected to the lower surface of the upper connecting plate (10), the lower surface of the upper steel groove (5) is a concave spherical surface, the lower steel groove (8) is connected to the upper surface of the lower connecting plate (11), and the upper surface of the lower steel groove (8) is a concave spherical surface; the double-spherical-surface lining body can slide in the concave spherical surface of the upper steel groove (5).

6. The automatic reset lead rubber composite shock insulation support according to claim 1, wherein the friction pendulum shock insulation unit further comprises an upper limit part (4) extending downwards from the edge of the upper connecting plate (10), and the upper limit part (4) is arranged around the double-spherical-surface lining body (6); the friction pendulum vibration isolation unit further comprises a lower limiting part (9) extending upwards from the edge of the lower connecting plate (11), and the lower limiting part is tightly attached to the double-spherical-surface lining body (6) to limit the double-spherical-surface lining body to slide on the concave spherical surface of the lower steel groove (8).

7. The automatic resetting lead rubber composite shock insulation support according to claim 1, wherein the friction pendulum shock insulation unit is an upper main sliding surface friction pendulum shock insulation unit, the double-spherical-surface lining body (6) is limited by the lower limiting part (9) on the lower steel groove (8) and cannot slide, and when an earthquake occurs, the double-spherical-surface lining body (6) slides in the concave spherical surface of the upper steel groove (5).

8. The automatic reset lead rubber composite shock insulation support according to claim 1, wherein: the upper connecting plate (10) is connected with the building upper structure through bolts, and the lower connecting plate (11) is connected with the building lower structure through bolts.