Bridge cylindrical surface tension and compression support

Abstract

The utility model discloses a bridge cylindrical surface tension and compression support which comprises an upper support assembly, a cylindrical surface assembly, a piston assembly, a middle support assembly and a lower support assembly. The piston assembly comprises a piston, a large circular groove is formed in the bottom of the piston, and a rubber plate is embedded in the large circular groove; the middle support assembly comprises a middle lining plate, and the top of the middle lining plate is also arranged in the large circular groove in the bottom of the piston; a sealing ring is further arranged between the rubber plate and the middle lining plate, and the rubber plate is sleeved with the sealing ring. The cylindrical surface friction pair and the rubber plate are adopted in the upper structure and the lower structure of the support respectively to meet different rotating deformation requirements of a bridge in the longitudinal bridge direction and the transverse bridge direction, meanwhile, the L-shaped guide rails are arranged in the longitudinal bridge direction and the transverse bridge direction respectively to transmit vertical drawing force of the structure, the stress and deformation functions of the support structure are clear, and later inspection and maintenance are facilitated.

Description

Technical Field

[0001] This utility model belongs to the field of bridge bearing technology, and more specifically, relates to a bridge column tension-compression bearing. Background Technology

[0002] The primary function of general bridge bearings is to transfer the vertical load of the main girder and accommodate structural displacement and rotation. However, for long-span suspension bridges and cable-stayed bridges, whose structural systems are often floating or semi-floating, the main girder vertical bearings, in addition to possessing the basic functions of conventional bearings, also need to have tensile and compressive resistance or limiting functions. On the other hand, the continuously increasing traffic volume in China in recent years has led to various component damages and abnormal structural movements in bridge bearings during their service life. The development of these defects can cause localized damage to the bridge structure, and in severe cases, directly endanger the safety of the bridge structure.

[0003] Currently, the vertical tension-compression bearing structures for long-span cable-stayed bridges in service are mainly roller-type and tension-shaft-type bearings. Roller-type bearings are devices capable of withstanding vertical loads and allowing horizontal movement. They typically consist of one or more rollers that roll on tracks, allowing the structure to displace under lateral forces without generating excessive frictional resistance. Tension-shaft-type bearings are used to withstand bidirectional axial forces, meaning they can resist both tension and compression simultaneously. This type of bearing typically includes a central shaft surrounded by springs or other elastic elements to absorb and disperse the forces applied to it.

[0004] However, roller-type tension-compression bearings are prone to defects during service, such as displacement jamming, damage to rolling friction pairs, and abnormal bolt breakage, which affect the bearing's function. This type of structure has been gradually abandoned in later bearing development. While the tension-shaft type tension-compression bearing structure has a clearly defined stress distribution, the tension shaft is essentially a "black box" during use, making its location difficult to inspect and hindering later maintenance. Therefore, a bridge column-face tension-compression bearing is needed that can meet the different rotational deformation requirements of the bridge in both the longitudinal and transverse directions, while ensuring clear stress and deformation functions and facilitating later inspection and maintenance. Utility Model Content

[0005] To address the aforementioned deficiencies or improvement needs of existing technologies, this utility model provides a bridge column tension-compression bearing. By employing column friction pairs and rubber plates in the upper and lower structures of the bearing respectively, it meets the different rotational deformation requirements of the bridge in the longitudinal and transverse directions. At the same time, L-shaped guide rails are set in the longitudinal and transverse directions to transmit the vertical pull-out force of the structure. The bearing structure has clear stress and deformation functions and is easy to inspect and maintain later.

[0006] To achieve the above objectives, this utility model provides a bridge column tension-compression bearing, comprising: an upper bearing assembly, a column assembly, a piston assembly, an intermediate bearing assembly, and a lower bearing assembly;

[0007] The piston assembly includes a piston, the bottom of which has a large circular groove in which a rubber plate is embedded.

[0008] The intermediate support assembly includes an intermediate liner plate, the top of which is also located in a large circular groove at the bottom of the piston.

[0009] A sealing ring is also provided between the rubber sheet and the intermediate liner, and the sealing ring is fitted onto the rubber sheet.

[0010] Furthermore, the main body of the rubber plate is a cylindrical structure, which is embedded in the circular groove at the bottom of the piston. A circular protrusion is provided at the bottom of the plate, which is concentric with the main body, forming a step between them.

[0011] Furthermore, the sealing ring is located at the step of the rubber plate;

[0012] The thickness of the sealing ring is the same as the thickness of the circular protrusion on the rubber plate, the inner diameter is the same as the diameter of the circular protrusion on the rubber plate, and the outer diameter is the same as the inner diameter of the circular groove at the bottom of the piston.

[0013] Furthermore, the piston has auxiliary ears extending outward from both sides of the top along the longitudinal bridge direction, and auxiliary ears also extending outward from both sides of the bottom along the transverse bridge direction;

[0014] The piston is vertically positioned between the lugs on the top and bottom sides, and narrow cylindrical grooves are opened at the lower ends of the lugs on the top and bottom sides.

[0015] The piston top has two auxiliary lugs with guide wear-resistant strips on their sides;

[0016] The piston has guide wear-resistant strips on the two auxiliary lugs at the bottom and on the top surface.

[0017] Furthermore, the bottom of the upper support assembly is provided with upper guide rail assemblies on both sides along the longitudinal direction of the bridge. The upper guide rail assembly includes upper guide rails provided on both sides of the upper support assembly and upper guide slide plates welded to the inner side of the upper guide rails.

[0018] The upper guide rails are used in pairs, with a support plate extending from the lower side of each rail towards the middle.

[0019] The upper guide plate is provided on each upper guide rail, and is an "L"-shaped mirror stainless steel plate welded to the support plate of the upper guide rail.

[0020] The guide wear-resistant strip on the piston top lug forms a guide friction pair with the side of the upper guide plate.

[0021] Furthermore, upper rocker shaft assemblies are also provided on both sides of the top of the piston;

[0022] The upper rocker assembly includes an upper rocker and an upper rocker wear-resistant strip.

[0023] Furthermore, the top surface of the upper rocker shaft is cylindrical, and the bottom surface is flat. The radius of the cylindrical surface is the same as the radius of the narrow cylindrical groove on the two auxiliary ears on the top of the piston, and the width is slightly smaller than the narrow cylindrical groove.

[0024] The wear-resistant strip of the upper rocker shaft is provided on the bottom surface of the upper rocker shaft, and it makes frictional contact with the upper guide plate.

[0025] Furthermore, the lower support assembly is provided with lower guide rail assemblies on both sides of the top of the lower support assembly along the transverse direction of the bridge. The lower guide rail assembly includes lower guide rails provided on both sides of the lower support assembly and lower guide slide plates welded to the inner side of the lower guide rails.

[0026] The lower guide rails are used in pairs, with a support plate extending from the upper side of each side toward the middle.

[0027] The lower guide plate is provided on each lower guide rail, and is an "L"-shaped mirror stainless steel plate welded to the support plate of the lower guide rail.

[0028] The guide wear-resistant strip on the bottom lug of the piston forms a guide friction pair with the side and bottom surfaces of the lower guide plate.

[0029] Furthermore, a cylindrical groove is formed on the top of the piston.

[0030] Furthermore, the cylindrical assembly includes a cylindrical liner disposed in a cylindrical groove at the top of the piston;

[0031] The bottom surface of the cylindrical liner is an arc-shaped cylindrical surface, the top surface is a plane, and the two end surfaces are planes and parallel to each other.

[0032] In summary, compared with the prior art, the above-described technical solution conceived by this utility model can achieve the following beneficial effects:

[0033] 1. The cylindrical tension-compression bearing of this utility model satisfies the different rotational deformation requirements of the bridge in the longitudinal and transverse directions by adopting cylindrical friction pairs and rubber plates in the upper and lower structures of the bearing, respectively. At the same time, L-shaped guide rails are set in the longitudinal and transverse directions to transmit the vertical pull-out force of the structure. The bearing structure has clear stress and deformation functions and is easy to inspect and maintain later.

[0034] 2. The cylindrical tension-compression support of this utility model has a cylindrical friction pair subjected to vertical force through surface contact. Compared with the line contact form of rolling friction pair, it is safer and more reliable in terms of structural force. Under the same load, the structural size of the cylindrical friction pair is smaller, which can optimize the overall shape of the support and make the support more cost-effective.

[0035] 3. The cylindrical tension and compression support of this utility model has a simpler structure and components compared to the commonly used roller type and anti-tension shaft type tension and compression supports, which facilitates the later inspection and maintenance of the support.

[0036] 4. In the cylindrical tension and compression support of this utility model, the lower guide plate and the guide wear-resistant strips on the sides of the auxiliary ears on both sides of the piston bottom and the bottom surface form a guide friction pair, which reduces the friction force for the support to move along the transverse bridge direction; the side of the upper guide plate and the guide wear-resistant strips on the sides of the auxiliary ears on both sides of the piston top form a guide friction pair, which reduces the friction force for the support to move along the longitudinal bridge direction. Attached Figure Description

[0037] Figure 1 This is a longitudinal half-section view of the overall structure of a bridge column tension-compression bearing according to an embodiment of the present invention.

[0038] Figure 2 This is a transverse half-sectional view of the overall structure of a self-monitoring tension-compression support according to an embodiment of the present invention.

[0039] Figure 3 This is a schematic diagram of the overall structure of a self-monitoring tension / compression support according to an embodiment of the present invention;

[0040] Figure 4 This is a schematic diagram of the upper support assembly structure of a self-monitoring tension / compression support according to an embodiment of the present invention;

[0041] Figure 5 This is a schematic diagram of a cylindrical component structure of a self-monitoring tension / compression support according to an embodiment of the present invention;

[0042] Figure 6 This is a schematic diagram of the piston assembly structure of a self-monitoring tension / compression support according to an embodiment of the present invention;

[0043] Figure 7 This is a schematic diagram of the upper guide rail assembly structure of a self-monitoring tension / compression support according to an embodiment of the present invention;

[0044] Figure 8 This is a schematic diagram of the lower guide rail assembly structure of a self-monitoring tension / compression support according to an embodiment of the present invention;

[0045] Figure 9 This is a schematic diagram of the upper rocker shaft assembly of a self-monitoring tension and compression support according to an embodiment of the present invention.

[0046] In all the accompanying drawings, the same reference numerals denote the same technical features, specifically: 1-upper support assembly, 11-upper support plate, 12-upper sliding stainless steel plate, 2-cylinder assembly, 21-cylinder liner, 22-upper sliding wear-resistant plate, 23-upper rotating stainless steel plate, 3-piston assembly, 31-piston, 32-upper rotating wear-resistant plate, 33-guide wear-resistant strip, 4-upper guide rail assembly, 41-upper guide rail, 42-upper guide plate, 5-upper rocker assembly, 51-upper rocker, 52-upper rocker wear-resistant strip, 6-rubber plate, 7-sealing ring, 8-intermediate support assembly, 81-intermediate liner, 82-lower sliding wear-resistant plate, 9-lower support assembly, 91-lower support plate, 92-lower sliding stainless steel plate, 10-lower guide rail assembly, 101-lower guide rail, 102-lower guide plate. Detailed Implementation

[0047] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model. Furthermore, the technical features involved in the various embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0048] like Figures 1-3 As shown, this utility model embodiment provides a bridge column tension-compression bearing, including an upper bearing assembly 1, a column assembly 2, a piston assembly 3, an upper guide rail assembly 4, an upper rocker shaft assembly 5, a rubber plate 6, a sealing ring 7, an intermediate bearing assembly 8, a lower bearing assembly 9, and a lower guide rail assembly 10. The column assembly 2 is located at the bottom of the upper bearing assembly 1, the piston assembly 3 is located at the bottom of the column assembly 2, the intermediate bearing assembly 8 is located at the bottom of the piston assembly 3, the rubber plate 6 is located between the piston assembly 3 and the intermediate bearing assembly 8, and the lower bearing assembly 9 is located at the bottom of the intermediate bearing assembly 8. The longitudinal rotation of the support is achieved by rotating the upper rocker assembly 5, and the transverse rotation is provided by the rubber plate 6 between the piston assembly 3 and the intermediate support assembly 8. At the same time, the bridge is subjected to tensile load in the vertical direction. The cylindrical friction pair and the rubber plate are used to meet the different rotation and deformation requirements of the bridge in the longitudinal and transverse directions. L-shaped guide rails are set in the longitudinal and transverse directions to transmit the vertical pull-out force of the structure. The stress and deformation functions of the support structure are clear and easy to inspect and maintain later.

[0049] like Figure 4As shown, the upper support assembly 1 includes an upper support plate 11 and an upper sliding stainless steel plate 12 welded to the bottom of the upper support plate 11. The upper support plate 11 is a rectangular plate structure with its long side along the longitudinal direction of the bridge. Grooves are provided on both sides of the bottom along the longitudinal direction, and the length of each groove is the same as the long side of the upper support plate 11. Multiple through holes are formed within the grooves. The upper stainless steel plate 12 is a mirror-finished stainless steel plate, corresponding in shape and size to the upper support plate 11. It is welded to the bottom surface of the upper support plate 11 and located between the grooves on both sides. The upper support assembly 1 connects to the bottom of the bridge, directly bearing the tensile and compressive forces applied by the bridge to the support.

[0050] like Figure 5 As shown, the cylindrical assembly 2 includes a cylindrical backing plate 21, an upper sliding wear-resistant plate 22 mounted on the top of the cylindrical backing plate 21, and an upper rotating stainless steel plate 23 mounted on the bottom of the cylindrical backing plate 21. The bottom surface of the cylindrical backing plate 21 is an arc-shaped cylindrical surface, the top surface is a flat surface with a large countersunk groove milled into it, and both end faces are flat and parallel to each other. The upper sliding wear-resistant plate 22 is cut from a smooth wear-resistant material, its size corresponding to the countersunk groove on the top surface of the cylindrical backing plate 21, and is embedded in the groove and fixed with glue. The upper rotating stainless steel plate 23 is made of mirror-finish stainless steel, is an arc-shaped plate, and its size and radius of curvature are the same as the arc-shaped cylindrical surface at the bottom of the cylindrical backing plate 21. The upper rotating stainless steel plate 23 is welded to the arc-shaped cylindrical surface.

[0051] Preferably, the upper sliding stainless steel plate 12 and the upper sliding wear-resistant plate 22 form a sliding friction pair, so that the bridge can slide freely along the longitudinal direction when subjected to longitudinal force, thus meeting the longitudinal plane displacement requirements of the bridge under normal working conditions.

[0052] like Figure 6As shown, the piston assembly 3 includes a piston 31, an upper rotating wear-resistant plate 32 mounted on the top of the piston 31, and a guide wear-resistant strip 33 mounted on the side of the piston 31. The piston 31 is a square block structure with a cylindrical groove on its top, the size of which matches the convex surface of the upper rotating stainless steel plate 23, and has the same radius of curvature. Accessory ears extend from both sides of the top of the piston 31 along the longitudinal direction. A large circular groove is formed at the bottom of the piston 31, and accessory ears also extend from both sides of the bottom along the transverse direction. The accessory ears on the top and bottom sides of the piston 31 are perpendicularly positioned, and narrow cylindrical grooves are formed at the lower ends of the top two accessory ears. The upper rotating wear-resistant plate 32 is cut from a smooth wear-resistant material; it is an arc plate, and its size and radius of curvature are the same as the cylindrical groove on the top of the piston 31, and it is fixed to the top cylindrical groove with glue. The piston 31 has guide wear-resistant strips 33 on the two auxiliary ears at the top, and guide wear-resistant strips 33 on the two auxiliary ears at the bottom and on the top surface. The two pairs of auxiliary ears provide guidance for the transverse and longitudinal movement of the support, and the guide wear-resistant strips 33 reduce the friction of the support movement, reduce the response speed of the support, improve the overall mobility of the support, and increase the service life of the support.

[0053] Preferably, the upper rotating wear-resistant plate 32 and the upper rotating stainless steel plate 23 form a longitudinal bridge-direction rotating friction pair, causing the support to rotate under longitudinal bridge-direction pressure, thus meeting the longitudinal bridge-direction vertical rotation requirements under normal bridge working conditions.

[0054] like Figure 7 As shown, the bottom of the upper support assembly 1 is also provided with upper guide rail assemblies 4 on both sides along the longitudinal bridge direction. The upper guide rail assembly 4 includes upper guide rails 41 installed in the grooves on both sides of the upper support plate 11 and upper guide slide plates 42 welded to the inner side of the upper guide rails 41. The upper guide rails 41 are used in pairs and are long, columnar structures with the same length as the longitudinal bridge length of the upper support plate 11. A protrusion is provided at the top, which mates with the groove at the bottom of the upper support plate 11, and multiple through holes are provided at the same position to fix the two together with bolts. A support plate extends from opposite sides of each upper guide rail 41 towards the middle. One upper guide slide plate 42 is provided on each upper guide rail 41, and is an "L"-shaped mirror stainless steel plate welded to the support plate of the upper guide rail 41, and also welded to the corresponding side.

[0055] The side of the upper guide plate 42 and the guide wear-resistant strips 33 on the sides of the auxiliary ears on both sides of the top of the piston 31 form a guide friction pair, which reduces the friction force for the support to move along the longitudinal bridge direction.

[0056] like Figure 9As shown, the upper rocker shaft assembly 5 is used in pairs and is located in the narrow cylindrical grooves at the lower ends of the auxiliary ears on both sides of the top of the piston 31. It includes an upper rocker shaft 51 and an upper rocker shaft wear-resistant strip 52. The top surface of the upper rocker shaft 51 is cylindrical, and the bottom surface is flat. The radius of the cylindrical surface is the same as the radius of the narrow cylindrical groove on the auxiliary ears on both sides of the top of the piston 31, and its width is slightly smaller than that narrow cylindrical groove. The upper rocker shaft wear-resistant strip 52 is glued to the bottom surface of the upper rocker shaft 51 and makes frictional contact with the upper guide plate 42.

[0057] A rubber plate 6 is embedded in the circular groove at the bottom of the piston 31. The main body of the rubber plate 6 is a cylindrical structure, embedded in the circular groove at the bottom of the piston 31. A circular protrusion is provided at the bottom of the rubber plate 6, which is concentric with the main body, forming a step. A sealing ring 7 is provided at the step of the rubber plate 6. The thickness of the sealing ring 7 is the same as the thickness of the circular protrusion of the rubber plate 6, the inner diameter is the same as the diameter of the circular protrusion of the rubber plate 6, and the outer diameter is the same as the inner diameter of the circular groove at the bottom of the piston 31.

[0058] The intermediate support assembly 8 is also located in the circular groove at the bottom of the piston 31, and includes an intermediate liner 81 and a lower sliding wear-resistant plate 82. The intermediate liner 81 is a stepped platform, wider at the top and narrower at the bottom, with its top diameter matching the diameter of the circular groove at the bottom of the piston 31. It is positioned within this groove, and its top surface contacts the bottom surface of the rubber plate 6. A circular groove is formed at the bottom of the intermediate liner 81, and the lower sliding wear-resistant plate 82 is disposed within this groove. The lower sliding wear-resistant plate 82 is a circular wear-resistant plate, glued and fixed to the circular groove at the bottom of the intermediate liner 81.

[0059] The lower support assembly 9 includes a lower support plate 91 and a sliding stainless steel plate 92 welded to the top of the lower support plate 91. The lower support plate 91 is a square plate structure with grooves at both ends in the transverse direction of the bridge. The length of each groove is the same as the transverse length of the lower support plate 91, and multiple through holes are formed within the grooves. The top groove of the lower support plate 91 is perpendicular to the bottom groove of the upper support plate 11. The sliding stainless steel plate 92 is a mirror-finished stainless steel plate, welded to the top surface of the lower support plate 91, and located between the grooves on both sides. The lower support assembly 91 is connected to the bridge pier, providing support for the entire support system.

[0060] Preferably, the lower sliding stainless steel plate 92 and the lower sliding wear-resistant plate 82 form a sliding friction pair, so that the bridge can slide freely in the transverse direction when subjected to transverse forces, thus meeting the transverse displacement requirements of the bridge under normal working conditions.

[0061] like Figure 8As shown, the top of the lower support plate 91 is provided with lower guide rail assemblies 10 on both sides along the transverse bridge direction. The lower guide rail assembly 10 includes lower guide rails 101 installed in the grooves on both sides of the lower support plate 91 and lower guide slide plates 102 welded to the inner side of the lower guide rails 101. The lower guide rails 101 are used in pairs and are long, columnar structures with the same length as the transverse bridge length of the lower support plate 91. A protrusion is provided at the top, which mates with the groove at the top of the lower support plate 91, and multiple through holes are provided at the same position to fix the two together with bolts. A support plate extends from opposite sides of each lower guide rail 101 towards the center. One lower guide slide plate 102 is provided on each lower guide rail 101, and is an "L"-shaped mirror stainless steel plate welded to the support plate of the lower guide rail 101, and also welded to the corresponding side.

[0062] The lower guide plate 102 and the guide wear-resistant strips 33 on the side and bottom surfaces of the piston 31 form a guide friction pair, which reduces friction for the support to move along the transverse bridge direction.

[0063] Those skilled in the art will readily understand that the above description is merely 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 bridge column tension-compression bearing, characterized in that, include: Upper support assembly (1), cylindrical surface assembly (2), piston assembly (3), intermediate support assembly (8), and lower support assembly (9); The piston assembly (3) includes a piston (31), the bottom of which has a large circular groove, in which a rubber plate (6) is embedded. The intermediate support assembly (8) includes an intermediate liner (81), the top of which is also located in a large circular groove at the bottom of the piston (31); A sealing ring (7) is also provided between the rubber plate (6) and the intermediate liner (81), and the sealing ring (7) is fitted onto the rubber plate (6).

2. A bridge column tension-compression bearing according to claim 1, characterized in that, The main body of the rubber plate (6) is a cylindrical structure, which is embedded in the circular groove at the bottom of the piston (31). A circular protrusion is provided at the bottom of the plate, which is concentric with the main body, forming a step between them.

3. A bridge column tension-compression bearing according to claim 2, characterized in that, The sealing ring (7) is located at the step of the rubber plate (6); The thickness of the sealing ring (7) is the same as the thickness of the circular protrusion of the rubber plate (6), the inner diameter is the same as the diameter of the circular protrusion of the rubber plate (6), and the outer diameter is the same as the inner diameter of the circular groove at the bottom of the piston (31).

4. A bridge column tension / compression bearing according to any one of claims 1-3, characterized in that, The piston (31) has auxiliary ears extending outward from both sides of the top along the longitudinal bridge direction, and auxiliary ears also extending outward from both sides of the bottom along the transverse bridge direction. The piston (31) is vertically positioned between the auxiliary ears on the top and bottom sides, and narrow cylindrical grooves are opened at the lower ends of the auxiliary ears on the top and bottom sides. The piston (31) has two auxiliary lugs on its top side with guide wear-resistant strips (33); The piston (31) has guide wear-resistant strips (33) on the two auxiliary lugs at the bottom and on the top surface.

5. A bridge column tension-compression bearing according to claim 4, characterized in that, The upper support assembly (1) is also provided with upper guide rail assemblies (4) on both sides of the bottom along the longitudinal direction of the bridge. The upper guide rail assembly (4) includes upper guide rails (41) provided on both sides of the upper support assembly (1) and upper guide slide plates (42) welded to the inner side of the upper guide rails (41). The upper guide rails (41) are used in pairs, with a support plate extending from the lower side of each side towards the middle; The upper guide plate (42) is provided on each upper guide rail (41), and is an "L"-shaped mirror stainless steel plate, which is welded to the support plate of the upper guide rail (41); A guide friction pair is formed between the guide wear-resistant strip (33) on the top lug of the piston (31) and the side of the upper guide plate (42).

6. A bridge column tension-compression bearing according to claim 5, characterized in that, The piston (31) is also provided with upper rocker shaft assemblies (5) on both sides of its top; The upper rocker assembly (5) includes an upper rocker (51) and an upper rocker wear-resistant strip (52).

7. A bridge column tension-compression bearing according to claim 6, characterized in that, The top surface of the upper rocker shaft (51) is cylindrical, and the bottom surface is flat. The radius of the cylindrical surface is the same as the radius of the narrow cylindrical groove on the two auxiliary ears on the top of the piston (31), and the width is slightly smaller than the narrow cylindrical groove. The wear-resistant strip (52) of the upper rocker shaft is disposed on the bottom surface of the upper rocker shaft (51) and is in frictional contact with the upper guide plate (42).

8. A bridge column tension-compression bearing according to claim 4, characterized in that, The lower support assembly (9) is also provided with a lower guide rail assembly (10) on both sides of the top of the lower support assembly (9) along the transverse direction. The lower guide rail assembly (10) includes a lower guide rail (101) provided on both sides of the lower support assembly (9) and a lower guide plate (102) welded to the inner side of the lower guide rail (101). The lower guide rails (101) are used in pairs, with a support plate extending from the upper side of each side toward the middle; The lower guide plate (102) is provided on each lower guide rail (101), and is an "L"-shaped mirror stainless steel plate welded to the support plate of the lower guide rail (101); The guide wear-resistant strip (33) on the bottom lug of the piston (31) forms a guide friction pair with the side and bottom surfaces of the lower guide plate (102).

9. A bridge column tension-compression bearing according to any one of claims 1-3, characterized in that, The piston (31) has a cylindrical groove on its top.

10. A bridge column tension-compression bearing according to claim 9, characterized in that, The cylindrical assembly (2) includes a cylindrical liner (21) disposed in a cylindrical groove at the top of the piston (31); The bottom surface of the cylindrical liner (21) is an arc-shaped cylindrical surface, the top surface is a plane, and the two end surfaces are planes and parallel to each other.

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