CN209114316U - Energy-consuming spherical steel support with multiple friction coefficients - Google Patents

Abstract

The utility model discloses an energy-consuming spherical steel bearing with multiple friction coefficients, which comprises an upper bearing plate, a spherical crown lining plate and a lower bearing plate. The spherical crown lining plate is arranged on the upper bearing plate and the lower bearing plate. Between the lower support plates, the upper surface of the spherical crown lining plate is provided with a plane wear-resistant plate, the upper surface of the lower support plate is provided with a spherical wear-resistant plate, and the upper There is a gap between at least one set of two opposing limiting members and the side surfaces corresponding to the lower support plate, the middle area of the lower surface of the upper support plate is friction surface one, and the lower surface of the upper support plate has a gap. The remaining area is the second friction surface, and the friction coefficient of the first friction surface is smaller than the friction coefficient of the second friction surface. The device is easy to install, more economical and applicable than the existing seismic isolation bearing, and does not have the problem of lifting beams, improves the energy dissipation capacity and effect of the bearing, improves the overall seismic performance and safety of the bridge structure, and reduces the impact of earthquakes on earthquakes. The damage of the bridge structure reduces the maintenance cost after the disaster.

Description

An energy-dissipating spherical steel bearing with multiple friction coefficients

technical field

The utility model relates to the technical field of spherical steel bearings, in particular to an energy-consuming spherical steel bearing with multiple friction coefficients.

Background technique

In the bridge structure, it is usually necessary to install the bearing between the bridge beam and the abutment. The bearing needs to have sufficient vertical stiffness and strength, and can reliably transfer all the load of the bridge beam to the abutment, reducing and To alleviate the vibration of the pier and abutment, in addition to bearing the large horizontal displacement, rotation angle and deformation of the bridge span structure caused by external forces such as earthquakes and wind, it also needs to adapt to the bridge span structure caused by normal operating loads, temperature and humidity changes. daily small horizontal displacements, corners and deformations.

For the existing bridge spherical steel bearing, the friction coefficient of the plane wear plate between the upper bearing plate and the spherical crown lining plate is generally set between 0.01 and 0.04 according to the requirements of the specification. The friction coefficient is low and is mainly used to adjust the main beam Due to the expansion and contraction deformation of the main beam caused by the temperature change and normal operating load, when an earthquake occurs, the bearing plate on the bearing has a large displacement deformation, and the seismic energy dissipation capacity of the spherical steel bearing is insufficient, resulting in the displacement of the superstructure If it is too large, it is very easy to cause the earthquake damage of the main beam. Therefore, in the high-intensity earthquake area, the bridge structure often adopts the vibration isolation bearing, such as the friction pendulum bearing and the hyperboloid spherical vibration isolation bearing. The cost of the shock-absorbing and isolating bearing is more than double that of the ordinary bearing, and the material cost is higher, and there is a problem of lifting the beam. Therefore, there is an urgent need for a spherical steel bearing with good economy and high seismic energy dissipation capacity.

Utility model content

The purpose of the utility model is to overcome the above-mentioned shortcomings of the existing spherical steel bearing, such as poor energy dissipation effect, insufficient shock resistance, and easy occurrence of falling beams, and provide an energy-consuming spherical steel bearing with multiple friction coefficients.

In order to achieve the above purpose, the utility model provides the following technical solutions:

An energy-dissipating spherical steel bearing with multiple friction coefficients includes an upper bearing plate, a spherical crown lining plate and a lower bearing plate, and the spherical crown lining plate is arranged between the upper bearing plate and the lower bearing plate. The upper surface of the spherical crown lining plate is provided with a plane wear-resistant plate, the upper surface of the lower support plate is provided with a spherical wear-resistant plate, and the upper support plate is provided with limit parts all around, at least one There is a gap between the two opposite limiting components of the group and the side surfaces corresponding to the lower support plate, the middle area of the lower surface of the upper support plate is the friction surface one, and the rest area of the lower surface of the upper support plate is the friction surface Second, the friction coefficient of the first friction surface is smaller than the friction coefficient of the second friction surface.

Using the energy-dissipating spherical steel bearing with multiple friction coefficients described in the utility model, the lower surface of the upper bearing plate is provided with friction areas with different friction coefficients (including static friction coefficients and dynamic friction coefficients). The friction coefficient of the friction surface 1 is small, there are limit parts around the upper support plate, and at least one set of the two opposite limit parts has a gap with the side corresponding to the lower support plate, so in the normal use state of the bridge Through the sliding friction between the plane wear plate and the friction surface 1, and the sliding friction between the spherical crown liner and the spherical wear plate, it can ensure that the bearing maintains a normal design displacement in one or two directions. Rotation, when encountering earthquake action, the displacement of the bearing increases, the plane wear plate enters the area of the second friction surface, and the friction coefficient of the second friction surface is larger, so that the friction energy dissipation capacity of the bearing is improved. , effectively dissipate seismic energy, the device is easy to install, more economical and applicable than the existing seismic isolation bearings, and there is no problem of lifting beams, which can not only cope with the normal displacement and deformation caused by operating loads, temperature, etc., but also can Effectively dissipate seismic energy during earthquakes, improve the energy dissipation capacity and effect of bearings, improve the overall seismic performance and safety of bridge structures, reduce earthquake damage to bridge structures, and reduce post-disaster maintenance costs.

Preferably, the first friction surface is a circular area, and the circular area is located at the center of the lower surface of the upper support plate.

Preferably, the second friction surface includes at least two regions with different friction coefficients, and the friction coefficient of the surface region of the second friction surface gradually increases from the inside to the outside.

Preferably, the friction coefficient of the first friction surface is 0.01-0.04.

Preferably, the friction coefficient of the second friction surface is 0.1-0.14.

Preferably, the limiting member is a bar-shaped block.

Further preferably, all the bar-shaped blocks are connected to the lower surface of the upper support plate.

Preferably, the two limiting members disposed at opposite ends are symmetrically disposed.

To sum up, compared with the prior art, the beneficial effects of the present utility model are:

1. The utility model adopts the energy-consuming spherical steel bearing with multiple friction coefficients, which is easy to install, more economical and applicable than the existing shock-absorbing and isolating bearings, and does not have the problem of lifting the beam, which can not only cope with the operation The normal displacement and deformation caused by load and temperature can effectively dissipate the seismic energy during the earthquake, improve the energy dissipation capacity and effect of the bearing, improve the overall seismic performance and safety of the bridge structure, and reduce the damage to the bridge structure caused by the earthquake. Reduce post-disaster maintenance costs.

Description of drawings:

1 is a structural cross-sectional view of a kind of energy-consuming spherical steel bearing with multiple friction coefficients according to the utility model;

Fig. 2 is the structural plan view of the spherical steel bearing in the embodiment 1;

3 is a bottom view of the structure of the upper support plate in Embodiment 1;

FIG. 4 is a bottom view of the structure of the upper support plate in Embodiment 2. FIG.

Marking in the figure: 1-upper bearing plate, 2-spherical crown lining plate, 3-lower bearing plate, 4-plane wear-resistant plate, 5-spherical wear-resistant plate, 6-limiting part, 7-friction surface one , 8 - friction surface two.

Detailed ways

The present utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. But it should not be construed that the scope of the above-mentioned subject matter of the present invention is limited to the following embodiments, and all technologies realized based on the content of the present invention belong to the scope of the present invention.

Example 1

As shown in Figures 1-3, an energy-consuming spherical steel bearing with multiple friction coefficients according to the present invention includes an upper bearing plate 1, a spherical crown lining plate 2 and a lower bearing plate 3. The crown lining plate 2 is arranged between the upper bearing plate 1 and the lower bearing plate 3, the upper surface of the spherical crown lining plate 2 is provided with a plane wear plate 4, and the upper surface of the lower bearing plate 3 A spherical wear-resistant plate 5 is provided, and limit members 6 are provided around the upper support plate 1. The limit members 6 are strip-shaped blocks, and all the strip-shaped blocks are connected to the upper support. On the lower surface of the plate 1, the two limiting members 6 arranged at opposite ends are symmetrically arranged and parallel to each other, and each of the limiting members 6 has a gap with the side corresponding to the lower support plate 3. The distance is determined according to the allowable displacement required by the design. The middle area of the lower surface of the upper support plate 1 is the friction surface one 7, and the friction surface one 7 is a circular area, and the circular area is located on the upper support plate 1. The center of the lower surface, the rest area of the lower surface of the upper support plate 1 is the friction surface two 8, the friction coefficient of the friction surface one 7 is smaller than the friction coefficient of the friction surface two 8, preferably, the friction surface one 7 The friction coefficient is 0.01-0.04, and the friction coefficient of the friction surface II 8 is 0.1-0.14.

Using the energy-dissipating spherical steel bearing with multiple friction coefficients described in the present invention, the lower surface of the upper bearing plate 1 is provided with friction areas with different friction coefficients. There is a gap on the side of the seat plate 3. In the normal use state of the bridge, the plane wear plate 4 rubs and slides with the friction surface 1. Because the friction coefficient of the friction surface 1 is small, the normal design of the bearing can be ensured in one or two directions. Displacement and rotation, when encountering earthquake action, the displacement of the bearing increases, the plane wear plate 4 enters the area of the second friction surface, so that the friction energy dissipation capacity of the bearing is improved, and the seismic energy is effectively dissipated. The device is easy to install, more economical and applicable than the existing seismic isolation bearings, and there is no problem of lifting beams. It can not only cope with the displacement and deformation caused by operating loads, temperature, etc., but also can effectively buffer the external force during earthquakes. The energy dissipation capacity and effect of the bearing can improve the overall seismic performance and safety of the bridge structure, reduce the damage to the bridge structure caused by the earthquake, and reduce the maintenance cost after the disaster.

Example 2

The structure of the energy-consuming spherical steel bearing with multiple friction coefficients described in the utility model is roughly the same as that of the first embodiment, the difference is that the friction surface two on the lower surface of the upper bearing plate 1 8 contains at least two regions with different friction coefficients, and the friction coefficient of the surface region of the friction surface 28 gradually increases from the inside to the outside, that is, the friction coefficient of the outermost region as shown in FIG. 4 is μ ₁ , and the middle layer region The friction coefficient is μ ₂ , the friction coefficient of the innermost region is μ ₃ , and μ _1> μ _2> μ ₃ .

The above 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 shall be included in the present invention. within the scope of protection of the utility model.

Claims (8)

1. An energy-consuming spherical steel bearing with multiple friction coefficients, characterized in that it comprises an upper bearing plate (1), a spherical crown lining plate (2) and a lower bearing plate (3), the spherical crown lining The plate (2) is arranged between the upper support plate (1) and the lower support plate (3), the upper surface of the spherical crown lining plate (2) is provided with a flat wear plate (4), the The upper surface of the lower support plate (3) is provided with a spherical wear-resistant plate (5), the upper support plate (1) is provided with limit parts (6) all around, and at least one set of two opposite said limiters is provided. The side part (6) corresponding to the lower support plate (3) has a gap, the middle area of the lower surface of the upper support plate (1) is the friction surface one (7). The remaining area of the surface is the friction surface two (8), the friction coefficient of the friction surface one (7) is smaller than the friction coefficient of the friction surface two (8). 2. The spherical steel bearing according to claim 1, wherein the friction surface one (7) is a circular area, and the circular area is located at the center of the lower surface of the upper bearing plate (1). . 3. The spherical steel bearing according to claim 1, wherein the friction surface two (8) comprises at least two regions with different friction coefficients, and the friction coefficient of the surface area of the friction surface two (8) ranges from Gradually increase from inside to outside. 4. The spherical steel bearing according to claim 1, wherein the friction coefficient of the friction surface one (7) is 0.01-0.04. 5. The spherical steel bearing according to claim 1, wherein the friction coefficient of the second friction surface (8) is 0.1-0.14. 6. The spherical steel support according to any one of claims 1-5, wherein the limiting member (6) is a bar-shaped stopper. 7. The spherical steel bearing according to claim 6, characterized in that, all the bar-shaped blocks are connected to the lower surface of the upper bearing plate (1). 8. The spherical steel bearing according to any one of claims 1-5, characterized in that, the two limiting members (6) provided at opposite ends are symmetrically arranged.