Spherical steel support for bridges

Abstract

This utility model relates to the field of spherical steel bearing technology, specifically to a spherical steel bearing for bridges, comprising a sliding plate, a spherical crown liner, a lower bearing, and a force-transmitting pad. The top surface of the lower bearing has a recess, and the curved side of the spherical crown liner is installed in the recess. A flat wear-resistant plate is provided between the spherical crown liner and the sliding plate, and a spherical wear-resistant plate is provided between the spherical crown liner and the recess. The top surface of the force-transmitting pad is used to connect with the steel beam, and the bottom surface of the force-transmitting pad is connected to the top surface of the sliding plate. The top surface of the force-transmitting pad covers the horizontal projection area of ​​the force-transmitting steel plate of the steel beam, and the bottom surface of the force-transmitting pad covers the area of ​​the flat wear-resistant plate. The thickness of the force-transmitting pad is greater than or equal to the maximum value of the radius of the flat wear-resistant plate and the horizontal distance from the force-transmitting steel plate to the centerline of the bearing. By adding the force-transmitting pad, this application can reduce the damage of concentrated forces to the internal wear-resistant plate of the spherical steel bearing, thereby improving the durability of the spherical steel bearing and extending its service life.

Description

Technical Field

[0001] This utility model relates to the field of spherical steel bearing technology, and in particular to a spherical steel bearing for bridges. Background Technology

[0002] In bridge construction, spherical steel bearings have become the preferred type of bearing in new bridge projects due to their significant advantages, such as high load-bearing capacity, low torque, and ability to achieve large rotation angles. Steel structure bridges, as one of the mainstream structural forms in bridge construction, have a force transmission mechanism that differs significantly from that of concrete bridges. Specifically, steel structure bridges typically use multiple vertical force-transmitting steel plates at the supports. However, this method easily causes the top plate of the spherical steel bearing to bear a large concentrated force. Under long-term concentrated force, the wear rate of the wear-resistant plates inside the spherical steel bearing will significantly accelerate, thus affecting the durability of the spherical steel bearing and shortening its service life. Utility Model Content

[0003] The purpose of this invention is to overcome the problem that the wear-resistant plate inside the spherical steel bearing will wear out significantly faster when the spherical steel bearing is subjected to concentrated forces transmitted by steel structure bridges, and to provide a spherical steel bearing for bridges.

[0004] This utility model provides a spherical steel bearing for bridges, comprising a sliding plate, a spherical crown liner, and a lower support. The spherical crown liner is located between the lower support and the sliding plate. The top surface of the lower support has a recess that matches the arc surface of the spherical crown liner. The arc surface side of the spherical crown liner is installed in the recess. A flat wear-resistant plate is provided between the top surface of the spherical crown liner and the sliding plate, and a spherical wear-resistant plate is provided between the arc surface of the spherical crown liner and the recess. The bearing also includes:

[0005] A force-transmitting pad is provided, the top surface of which is used to connect with the steel beam, and the bottom surface of which is connected with the top surface of the sliding plate. The top surface of the force-transmitting pad covers the horizontal projection area of ​​the force-transmitting steel plate of the steel beam, and the bottom surface of the force-transmitting pad covers the area of ​​the flat wear-resistant plate. The thickness of the force-transmitting pad is greater than or equal to the maximum value of the radius of the flat wear-resistant plate and the horizontal distance from the force-transmitting steel plate to the center line of the support.

[0006] As a key component of the bridge structure, the steel beams primarily function to effectively transfer the load borne by the bridge to the supports.

[0007] This utility model provides a spherical steel bearing for bridges. The load of the steel beam can be transferred to the lower support sequentially through the force transmission pad, the sliding plate, the flat wear-resistant plate, the spherical crown liner, and the spherical wear-resistant plate, and then the lower support transfers the load to the bridge pier. The sliding plate is connected to the bottom surface of the force transmission pad, and the flat wear-resistant plate is provided between the sliding plate and the top surface of the spherical crown liner, which can provide a translational sliding interface for the superstructure. When the superstructure is subjected to force or displacement, it can allow a certain amount of sliding, reduce the constraints between structures, and release stress. The spherical crown liner is located between the lower support and the sliding plate. The arc surface of the spherical crown liner matches the recess on the top surface of the lower support and is installed therein. The spherical wear-resistant plate is provided between the arc surface and the recess. The spherical crown liner can rotate relative to the lower support and provide a rotation sliding interface for the upper structure. When the upper structure is subjected to force or displacement, it can allow a certain degree of rotation, reduce the constraints between structures, and avoid additional stress on the structure due to constraints.

[0008] The top surface of the force-transmitting pad covers the horizontal projection area of ​​the force-transmitting steel plate of the steel beam, and the bottom surface of the force-transmitting pad covers the area of ​​the flat wear-resistant plate. The thickness of the force-transmitting pad is greater than or equal to the maximum value of the radius of the flat wear-resistant plate and the horizontal distance from the force-transmitting steel plate to the center line of the support. In this design, when the top of the force-transmitting pad bears a concentrated force applied from the force-transmitting steel plate of the steel beam, the force-transmitting pad can effectively diffuse this concentrated force evenly into a uniformly distributed force during the transmission to its bottom surface. In this way, the concentrated force on the sliding plate will be significantly reduced. Since the concentrated force causes significant damage to the wear-resistant plate inside the spherical steel support, reducing the concentrated force can effectively slow down the wear rate of the wear-resistant plate inside the spherical steel support, thereby improving the durability of the spherical steel support and extending its service life.

[0009] The force transmission pad can be a cuboid structure, a cylindrical structure, a frustum structure, or a flat-topped pyramid structure.

[0010] The flat wear-resistant plate and the spherical wear-resistant plate can be made of polytetrafluoroethylene (PTFE) or ultra-high molecular weight polyethylene (UHMWPE).

[0011] The polytetrafluoroethylene (PTFE) is a polymer compound formed by free radical polymerization of tetrafluoroethylene (C2F4) monomers, with the chemical formula (C2F4). n Its molecular structure consists of carbon atoms completely surrounded by fluorine atoms, forming a highly symmetrical helical chain structure.

[0012] The ultra-high molecular weight polyethylene is linear polyethylene (PE) with a molecular weight of 1.5 million to 10 million g / mol or higher, and its chemical formula is —(CH2—CH2). n— Its molecular chains are extremely long and unbranched, and its molecular structure is highly regular.

[0013] Preferably, the force-transmitting pad is an inverted frustum or a flat-topped pyramid structure. Compared to cuboid and cylindrical structures, frustum or flat-topped pyramid structures are more economical in terms of material usage. A frustum structure refers to a geometric shape formed by cutting off the top of a cone with a cross-section parallel to its base. This geometric shape has two parallel circular bases (upper and lower bases) and one side surface (a portion of the cone's side surface). A flat-topped pyramid structure refers to a pyramid structure where the top is cut away with a plane parallel to the base, leaving a flat-topped structure.

[0014] Preferably, the angle between the side of the force transmission pad and the horizontal plane is 30°-60°.

[0015] Preferably, the top surface of the spherical crown liner is provided with a first groove, and the flat wear-resistant plate is installed in the first groove, the depth of the first groove being less than the thickness of the flat wear-resistant plate; the recessed portion is provided with a second groove, and the spherical wear-resistant plate is installed in the second groove, the depth of the second groove being less than the thickness of the spherical wear-resistant plate.

[0016] In this design, the cooperation between the first groove and the planar wear-resistant plate, and the cooperation between the second groove and the spherical wear-resistant plate, respectively achieve the function of fixing the planar wear-resistant plate and the spherical wear-resistant plate. Specifically, the first groove and the second groove can provide lateral restraint forces for the planar wear-resistant plate and the spherical wear-resistant plate, respectively. The design that the depth of the first groove is less than the thickness of the planar wear-resistant plate, and the depth of the second groove is less than the thickness of the spherical wear-resistant plate, is to ensure that the planar wear-resistant plate can maintain a normal contact state with the sliding plate, and the spherical wear-resistant plate can maintain a normal contact state with the spherical crown liner, thereby ensuring that the entire device can work normally and stably.

[0017] Preferably, the force transmission pad is provided with a first connecting plate and a second connecting plate at its top and bottom, respectively. The first connecting plate is used to connect to the steel beam by bolts, and the second connecting plate is used to connect to the sliding plate by bolts. In this design, the first connecting plate increases the contact area between the top of the force transmission pad and the steel beam, thereby expanding the effective connection area; the second connecting plate increases the contact area between the bottom of the force transmission pad and the sliding plate, expanding the connection area at that location. The expansion of the connection area helps to disperse the stress borne by the connection part, thus making the connection between the force transmission pad, the steel beam, and the sliding plate more stable and reliable.

[0018] Preferably, a flat stainless steel plate is provided between the sliding plate and the flat wear-resistant plate, and the flat stainless steel plate is connected to the bottom surface of the sliding plate; a spherical stainless steel plate is provided between the spherical crown liner and the spherical wear-resistant plate, and the spherical stainless steel plate is connected to the arc surface of the spherical crown liner. In this design, the flat stainless steel plate and the flat wear-resistant plate cooperate to form a planar friction pair. Because the flat stainless steel plate has a low coefficient of friction, the planar friction pair formed by the two can effectively reduce the friction during the sliding process, thereby providing the sliding plate with a smoother and more stable translational sliding effect.

[0019] The spherical stainless steel plate and the spherical wear-resistant plate together form a rotating friction pair. Due to the properties of the spherical stainless steel plate, this rotating friction pair can significantly reduce friction when the spherical crown liner rotates, thereby providing the spherical crown liner with better rotational performance.

[0020] Preferably, the thickness of both the planar stainless steel plate and the spherical stainless steel plate is 2mm-3mm, and the surface roughness of both the planar stainless steel plate and the spherical stainless steel plate is less than or equal to 0.8μm.

[0021] Preferably, the bottom of the lower support is provided with an anchor, which is used to be embedded in the pad stone of the pier.

[0022] Preferably, both the planar wear-resistant plate and the spherical wear-resistant plate are made of ultra-high molecular weight polyethylene (UHMWPE). Compared with polytetrafluoroethylene (PTFE), UHMWPE not only has superior impact resistance, but its wear resistance also increases with increasing load, while being more affordable, thus offering better cost-effectiveness.

[0023] Preferably, a rubber pad is provided between the force transmission pad and the sliding plate. In this design, the rubber pad, due to its elastic properties, can absorb and disperse vibration energy through its deformation when vibration occurs, thereby effectively playing a role in shock absorption.

[0024] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0025] This invention provides a spherical steel bearing for bridges. By adding the force transmission pad, the damage of concentrated force to the wear-resistant plate inside the spherical steel bearing can be reduced, thereby improving the durability of the spherical steel bearing and extending its service life. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of a spherical steel bearing for a bridge in Example 1.

[0027] Figure 2 for Figure 1A magnified view of region A in the middle.

[0028] Figure 3 This is a first schematic diagram of a spherical steel bearing for bridges in Example 2.

[0029] Figure 4 for Figure 3 A magnified view of region B in the middle.

[0030] Figure 5 This is a second schematic diagram of a spherical steel bearing for bridges in Example 2.

[0031] Figure 6 This is a first schematic diagram of a spherical steel support in the prior art.

[0032] Figure 7 This is a second schematic diagram of a spherical steel support in the prior art.

[0033] Marked in the image:

[0034] 1-Force transmission pad,

[0035] 101 - First connecting plate, 102 - Second connecting plate

[0036] 2-Sliding plate,

[0037] 3-Flat wear-resistant plate,

[0038] 4-Spherical crown liner,

[0039] 5-Spherical wear-resistant plate,

[0040] 6-Lower support,

[0041] 7-Anchorage component,

[0042] 8-Steel beam,

[0043] 801 - Force transmission steel plate, 802 - Base plate. Detailed Implementation

[0044] The present invention will be further described in detail below with reference to specific embodiments. However, it should not be construed as limiting the scope of the above-mentioned subject matter of the present invention to the following embodiments. All technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0045] Unless otherwise specified, the terms "upper," "lower," "left," "right," "center," "inner," and "outer" used in the description of specific embodiments of this utility model to indicate orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product / equipment / device is usually placed during use. These terms are merely for the purpose of facilitating the description of the utility model solution or simplifying the description in specific embodiments, and for enabling those skilled in the art to quickly understand the solution, and do not indicate or imply that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship. Therefore, they should not be construed as limitations on this utility model.

[0046] Furthermore, the use of terms such as "horizontal," "vertical," "suspended," "parallel," and "coaxial" does not imply that the corresponding device / component / element must be absolutely horizontal, vertical, suspended, parallel, or coaxial. Slight tilt or deviation is permissible, as long as it does not affect the normal function of the relevant component. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," not that the structure must be perfectly horizontal; a slight tilt is acceptable. "Coaxial" means that two components are arranged as coaxially as possible, allowing them to move coaxially or approximately coaxially when their relative positions change. Alternatively, it can be simplified to mean that the corresponding device / component / element, when arranged in "horizontal," "vertical," "suspended," "parallel," or "coaxial" directions, can have an error / deviation of ±10% relative to the corresponding direction, more preferably within ±8%, more preferably within ±6%, more preferably within ±5%, and more preferably within ±4%. For example, the deviation in the "coaxial" direction is controlled within 0.2-1mm, preferably within 0.2-0.5mm. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its function in the present invention.

[0047] Furthermore, the use of terms such as "first," "second," and "third" in terminology is merely for distinguishing descriptions of identical or similar components and should not be interpreted as emphasizing or implying the relative importance of a particular component.

[0048] Furthermore, in the description of the embodiments of this utility model, "several", "multiple", and "several" represent at least two. The number can be any number, such as two, three, four, five, six, seven, eight, or nine, and can even exceed nine.

[0049] Furthermore, in the description of the technical solution of this utility model, unless otherwise explicitly specified / limited / restricted, the terms "set up," "install," "connect," "link," "provided with," "laid out," and "arranged" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to common connection methods in the art, such as welding, riveting, bolting, and threaded connections. Such connections can be mechanical, electrical, or communication connections; they can be direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components.

[0050] Example 1

[0051] Figure 6 and Figure 7 The connection method between the spherical steel support and the steel beam 8 in the prior art is shown.

[0052] exist Figure 6 In the presented connection method, force-transmitting steel plates 801 are arranged on the left and right sides of the cross-section of the steel beam 8. These force-transmitting steel plates 801 transfer the load borne by the steel beam 8 to the sliding plate 2 through the bottom plate 802 of the steel beam 8. Under this stress condition, the left and right sides of the flat wear-resistant plate 3 and the spherical wear-resistant plate 5 will bear relatively larger concentrated loads, which is not conducive to the uniform stress on both sides, and thus easily leads to faster wear on the left and right sides of the flat wear-resistant plate 3 and the spherical wear-resistant plate 5.

[0053] exist Figure 7 In the presented connection method, the force-transmitting steel plate 801 is located at the middle position of the cross-section of the steel beam 8, and it transmits the load of the steel beam 8 to the sliding plate 2 through the bottom plate 802 of the steel beam 8. Under this stress condition, the middle position of the flat wear-resistant plate 3 and the spherical wear-resistant plate 5 will bear a relatively larger concentrated load, which is also not conducive to the uniform stress on both, and easily causes the middle position of the flat wear-resistant plate 3 and the spherical wear-resistant plate 5 to wear faster.

[0054] Based on the above, such as Figure 1 and Figure 2 As shown, this embodiment provides a spherical steel bearing for bridges, including a force transmission pad 1, a sliding plate 2, a spherical crown liner 4, and a lower support 6.

[0055] The spherical crown liner 4 is located between the lower support 6 and the sliding plate 2. The top surface of the lower support 6 is provided with a recess that matches the arc surface of the spherical crown liner 4. The side of the spherical crown liner 4 with the arc surface is installed in the recess. A flat wear-resistant plate 3 is provided between the top surface of the spherical crown liner 4 and the sliding plate 2. A spherical wear-resistant plate 5 is provided between the arc surface of the spherical crown liner 4 and the recess.

[0056] The top surface of the force transmission pad 1 is used to connect with the steel beam 8, and the bottom surface of the force transmission pad 1 is connected with the top surface of the sliding plate 2. The top surface of the force transmission pad 1 covers the horizontal projection area of ​​the force transmission steel plate 801 of the steel beam 8, and the bottom surface of the force transmission pad 1 covers the area of ​​the flat wear-resistant plate 3. The thickness of the force transmission pad 1 is greater than or equal to the maximum value of the radius of the flat wear-resistant plate 3 and the horizontal distance from the force transmission steel plate 801 to the center line of the support. The top surface area of ​​the force transmission pad 1 is larger than its bottom surface area, and the force transmission pad 1 has an overall structure that is wider at the top and narrower at the bottom. The force transmission pad 1 can be a solid structure or a double-layer structure made of spliced ​​steel plates. If a spliced ​​steel plate structure is used, it must be ensured that its overall stiffness is higher than that of the bottom plate 802 of the steel beam 8 and the overall stiffness of the sliding plate 2.

[0057] Specifically, the planar shape of the lower support 6 can be square or circular, and the depth of the recess can be 1cm-6cm. The force transmission pad 1, sliding plate 2, spherical crown liner 4, and lower support 6 are all made of steel.

[0058] In an optional embodiment, the force transmission pad 1 can be an inverted frustum structure or a flat-topped pyramid structure.

[0059] In an optional embodiment, the angle between the side of the force transmission pad 1 and the horizontal plane can be 30°-60°, and the specific angle can be 30°, 35°, 40°, 45°, 50°, 55°, or 60°.

[0060] In an optional embodiment, the top surface of the spherical crown liner 4 may be provided with a first groove, and the flat wear-resistant plate 3 is installed in the first groove, the depth of the first groove being less than the thickness of the flat wear-resistant plate 3; the recessed portion may be provided with a second groove, and the spherical wear-resistant plate 5 is installed in the second groove, the depth of the second groove being less than the thickness of the spherical wear-resistant plate 5.

[0061] Specifically, the thickness of the flat wear-resistant plate 3 and the spherical wear-resistant plate 5 can be 7mm-8mm. The depth of the first groove can be 0.5-0.7 times the thickness of the flat wear-resistant plate 3, and the depth of the second groove can also be 0.5-0.7 times the thickness of the spherical wear-resistant plate 5. The flat wear-resistant plate 3 and the spherical wear-resistant plate 5 are respectively bonded to the first groove and the second groove with structural adhesive.

[0062] In an optional embodiment, the top and bottom of the force transmission pad 1 may be provided with a first connecting plate 101 and a second connecting plate 102, respectively. The first connecting plate 101 is used to connect to the steel beam 8 by bolts, and the second connecting plate 102 is connected to the sliding plate 2 by bolts. Specifically, the force transmission pad 1, the first connecting plate 101, and the second connecting plate 102 are integrally formed. Both the first connecting plate 101 and the second connecting plate 102 are provided with screw holes for bolt connection.

[0063] In an optional embodiment, a flat stainless steel plate may be provided between the sliding plate 2 and the flat wear-resistant plate 3, and the flat stainless steel plate is connected to the bottom surface of the sliding plate 2; a spherical stainless steel plate may be provided between the spherical crown liner 4 and the spherical wear-resistant plate 5, and the spherical stainless steel plate is connected to the arc surface of the spherical crown liner 4.

[0064] Specifically, the area of ​​the flat stainless steel plate is larger than that of the flat wear-resistant plate 3, and during installation, the flat stainless steel plate can completely cover the flat wear-resistant plate 3. The area of ​​the spherical stainless steel plate is larger than that of the spherical wear-resistant plate 5, and during installation, the spherical stainless steel plate can completely cover the spherical wear-resistant plate 5. The flat stainless steel plate is welded to the sliding plate 2, and the spherical stainless steel plate is welded to the spherical crown liner 4.

[0065] In an optional embodiment, the thickness of both the planar stainless steel plate and the spherical stainless steel plate can be 2mm-3mm, specifically 2mm or 3mm. The surface roughness of both the planar stainless steel plate and the spherical stainless steel plate can be less than or equal to 0.8μm, specifically 0.8μm, 0.7μm, or 0.6μm.

[0066] In an optional embodiment, the bottom of the lower support 6 may be provided with anchorage components 7, which are used to embed in the pad stone of the pier. Specifically, the number of anchorage components 7 is at least four. The bottom of the lower support 6 may be provided with an integrally formed connecting plate, and the anchorage components 7 are connected to the connecting plate by bolts. The anchorage component 7 may specifically be an anchorage steel bar, which is usually a long strip-shaped structure with uniform thickness and regular raised texture on its surface to enhance anchoring performance.

[0067] In an optional embodiment, both the flat wear-resistant plate 3 and the spherical wear-resistant plate 5 can be made of ultra-high molecular weight polyethylene.

[0068] In an optional embodiment, a rubber pad may be provided between the force transmission pad 1 and the sliding plate 2. The thickness of the rubber pad may be 5mm-30mm, specifically 5mm, 10mm, 20mm, or 30mm.

[0069] Example 2

[0070] like Figures 3 to 5 As shown, this embodiment provides another spherical steel bearing for bridges, including a force transmission pad 1, a spherical crown liner 4, and a sliding plate 2.

[0071] The spherical crown liner 4 is located between the force transmission pad 1 and the sliding plate 2.

[0072] The bottom surface of the force transmission pad 1 is provided with a recessed area that matches the arc surface of the spherical crown liner 4, and the side of the spherical crown liner 4 with the arc surface is installed in the recessed area.

[0073] A spherical wear-resistant plate 5 is provided between the force transmission pad 1 and the spherical crown liner 4; a flat wear-resistant plate 3 is provided between the spherical crown liner 4 and the sliding plate 2.

[0074] The top surface of the force transmission pad 1 is used to connect with the steel beam 8; the top surface of the force transmission pad 1 covers the horizontal projection area of ​​the force transmission steel plate 801 of the steel beam 8, and the bottom surface of the force transmission pad 1 covers the area of ​​the spherical wear-resistant plate 5.

[0075] The thickness of the force transmission pad 1 is greater than or equal to the radius of the flat wear-resistant plate 3 and the maximum horizontal distance from the force transmission steel plate 801 to the center line of the support.

[0076] The sliding plate 2 is equipped with an anchor 7, which is used to embed in the pad stone of the pier. The anchor 7 is connected to the sliding plate 2 by bolts.

[0077] In an optional embodiment, the top surface of the force transmission pad 1 can be connected to the steel beam 8 via the first connecting plate 101.

[0078] In an optional embodiment, the main body shape of the force transmission pad 1 can be an inverted frustum structure or a flat-topped pyramid structure, such as... Figure 3 As shown.

[0079] In an optional embodiment, the main body shape of the force transmission pad 1 can be a cylinder, such as... Figure 5 As shown.

[0080] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A spherical steel bearing for a bridge, comprising a sliding plate (2), a spherical crown liner (4), and a lower bearing (6), wherein the spherical crown liner (4) is located between the lower bearing (6) and the sliding plate (2), the top surface of the lower bearing (6) is provided with a recess that matches the arc surface of the spherical crown liner (4), and the arc surface side of the spherical crown liner (4) is installed in the recess; a flat wear-resistant plate (3) is provided between the top surface of the spherical crown liner (4) and the sliding plate (2), and a spherical wear-resistant plate (5) is provided between the arc surface of the spherical crown liner (4) and the recess, characterized in that, Also includes: Force transmission pad (1), the top surface of the force transmission pad (1) is used to connect with the steel beam (8), the bottom surface of the force transmission pad (1) is connected with the top surface of the sliding plate (2); the top surface of the force transmission pad (1) covers the horizontal projection area of ​​the force transmission steel plate (801) of the steel beam (8), and the bottom surface of the force transmission pad (1) covers the area of ​​the flat wear-resistant plate (3); the thickness of the force transmission pad (1) is greater than or equal to the maximum value of the radius of the flat wear-resistant plate (3) and the horizontal distance from the force transmission steel plate (801) to the center line of the support.

2. A spherical steel bearing for bridges according to claim 1, characterized in that, The force transmission pad (1) is an inverted frustum structure or a flat-topped pyramid structure.

3. A spherical steel bearing for bridges according to claim 2, characterized in that, The angle between the side of the force transmission pad (1) and the horizontal plane is 30°-60°.

4. A spherical steel bearing for bridges according to claim 1, characterized in that, The top surface of the spherical crown liner (4) is provided with a first groove, and the flat wear-resistant plate (3) is installed in the first groove. The depth of the first groove is less than the thickness of the flat wear-resistant plate (3). The recessed part is provided with a second groove, and the spherical wear-resistant plate (5) is installed in the second groove. The depth of the second groove is less than the thickness of the spherical wear-resistant plate (5).

5. A spherical steel bearing for bridges according to any one of claims 1-4, characterized in that, The force transmission pad (1) is provided with a first connecting plate (101) and a second connecting plate (102) at the top and bottom respectively. The first connecting plate (101) is used to connect to the steel beam (8) by bolts, and the second connecting plate (102) is connected to the sliding plate (2) by bolts.

6. A spherical steel bearing for bridges according to claim 5, characterized in that, A flat stainless steel plate is provided between the sliding plate (2) and the flat wear-resistant plate (3), and the flat stainless steel plate is connected to the bottom surface of the sliding plate (2); a spherical stainless steel plate is provided between the spherical crown liner (4) and the spherical wear-resistant plate (5), and the spherical stainless steel plate is connected to the arc surface of the spherical crown liner (4).

7. A spherical steel bearing for bridges according to claim 6, characterized in that, The thickness of both the flat stainless steel plate and the spherical stainless steel plate is 2mm-3mm, and the surface roughness of both the flat stainless steel plate and the spherical stainless steel plate is less than or equal to 0.8μm.

8. A spherical steel bearing for bridges according to claim 5, characterized in that, The bottom of the lower support (6) is provided with an anchor (7), which is used to be embedded in the pad stone of the pier.

9. A spherical steel bearing for bridges according to claim 5, characterized in that, Both the flat wear-resistant plate (3) and the spherical wear-resistant plate (5) are made of ultra-high molecular weight polyethylene.

10. A spherical steel bearing for bridges according to claim 5, characterized in that, A rubber pad is provided between the force transmission pad (1) and the sliding plate (2).

Images