Longitudinal vibration suppression support for floating system

Abstract

The utility model relates to the technical field of supports and provides a longitudinal vibration suppression support for a floating system to solve the problems that in existing floating system and semi-floating system bridges, when a vehicle rapidly passes through a beam end expansion joint, the bridges move longitudinally, driving comfort and safety are affected, and bridge structures are affected. Comprising an upper structure and a lower structure, the upper structure comprises an upper support plate and a middle steel plate located below the upper support plate, a metal plate is fixedly connected to the bottom face of the upper support plate, a friction plate is installed on the top of the middle steel plate, the friction plate and the metal plate form a sliding pair, and the friction coefficient of the friction plate is 0.1-0.3; after the friction plate is installed, the friction plate and the sliding face are pressed tightly through the self weight of the bridge, damping force in all directions is generated after pressing, impact force generated when a vehicle passes through the bridge can be completely counteracted by the damping force generated by the friction plate and the sliding face, and therefore bridge vibration caused by passing of the vehicle is effectively restrained.

Description

Technical Field

[0001] The utility model relates to the technical field of supports, and in particular to a longitudinal vibration suppression support for a floating system. Background Art

[0002] With the continuous growth of traffic demand, the continuous improvement of road grades and the expansion of construction scale, bridges are showing a development trend of increasing spans, enriching bridge types and becoming lighter in structure. At the same time, more and more attention is paid to the economy and comprehensive benefits of bridge construction. In the design of large-span bridges, cable-stayed bridges and suspension bridges, as a cable system, have a larger span capacity than beam bridges, rigid frame bridges and arch bridges. Their rigid and flexible structures conform to the characteristics of material stress, making them the preferred bridge types for large-span bridges. According to different bridge design schemes, the structural systems of cable-stayed bridges and suspension bridges are divided into four structural systems: floating system (tower-pier consolidation, tower-beam separation), semi-floating system (tower-beam separation, vertical support is set at the main beam under the pier-tower), tower-beam consolidation system (pier-beam consolidation, tower-pier separation) and rigid frame system (beam, tower, pier consolidation). Among them, floating system and semi-floating system are particularly widely used.

[0003] In floating and semi-floating bridges, the bridge beam has low rigidity and light weight. When a vehicle passes through the expansion joint at the beam end quickly, the impact of the vehicle will cause the bridge to move longitudinally, affecting the driving comfort and safety, and also having a certain impact on the life of the bridge structure. It is usually adopted to install dampers at the beam ends to suppress the longitudinal vibration of the bridge caused by vehicle impact. The damper is expensive and requires a large installation space. It is also necessary to set up a special installation base at the beam end, which increases the difficulty of bridge layout. Utility Model Content

[0004] The utility model aims to provide a longitudinal vibration suppression support for a floating system, so as to solve the problem in existing floating system and semi-floating system bridges that when a vehicle quickly passes through the expansion joint at the end of the beam, the bridge will experience longitudinal movement, which will affect the comfort and safety of driving and the bridge structure.

[0005] The utility model is realized by adopting the following technical solutions:

[0006] The utility model provides a longitudinal vibration suppression support for a floating system, comprising an upper structure and a lower structure, wherein the upper structure comprises an upper support plate and an intermediate steel plate located therebelow, a metal plate being fixedly connected to the bottom surface of the upper support plate, a friction plate being installed on the top of the intermediate steel plate, the friction plate and the metal plate forming a group of sliding pairs, and the friction coefficient of the friction plate being 0.1-0.3.

[0007] As the preferred technical solution:

[0008] The friction plate is made of a polymer material plate or a metal material plate.

[0009] As the preferred technical solution:

[0010] The friction plate is not limited to a polymer material plate or a metal material plate, and any other material that meets the friction coefficient may be used.

[0011] As the preferred technical solution:

[0012] The lower structure includes a rubber plate and a bottom basin, the middle steel plate is placed on the rubber plate, and the middle steel plate and the rubber plate are installed in the bottom basin.

[0013] As the preferred technical solution:

[0014] A circle of rubber plate notch grooves is arranged on the top edge of the rubber plate, and a sealing ring is installed in the rubber plate notch grooves.

[0015] As the preferred technical solution:

[0016] The sealing ring is a copper ring.

[0017] As the preferred technical solution:

[0018] The metal plate is a top plate stainless steel plate.

[0019] As the preferred technical solution:

[0020] The top plate stainless steel plate is welded to the bottom surface of the upper support plate to serve as a sliding surface.

[0021] As the preferred technical solution:

[0022] When the support is a one-way movable support, a guide bar is installed on the inner side of the stopper of the upper support plate, and a guide plate is installed on the outer side of the middle steel plate, and the guide bar and the guide plate are slidably connected.

[0023] As the preferred technical solution:

[0024] The friction plate is installed in the groove on the top surface of the middle steel plate. A sealing ring is installed on the outer periphery of the friction plate, and the sealing ring is also installed in the groove on the top surface of the middle steel plate.

[0025] As the preferred technical solution:

[0026] Anchor bolts, anchor sleeves and anchor rods are installed at the anchor holes on the upper support plate and the bottom basin.

[0027] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0028] The longitudinal vibration suppression bearing of the utility model replaces the flat sliding plate in the bearing with a friction plate with a larger friction coefficient, and presses the sliding surface of the friction plate by the deadweight of the bridge superstructure, thereby providing horizontal damping force in all directions. The size of the damping force is only related to the deadweight of the bridge superstructure and the friction coefficient of the friction plate material. The adjustment of the damping force is achieved by replacing the friction plate material.

[0029] After the friction plate is installed, the bearing has a large deadweight of the bridge, and the deadweight compresses the friction plate and the sliding surface, which generates damping forces in all directions. At this time, the impact force generated by the vehicle passing through the bridge can be completely offset by the damping force generated by the friction plate and the sliding surface, thereby effectively suppressing the vibration of the bridge caused by the impact force of the vehicle passing on the bridge. The force under temperature displacement and seismic displacement will be much greater than the friction force provided by the friction plate, so that the bearing can also adapt to temperature displacement and seismic displacement; and when the bridge is at high or low temperature, the damping force generated can offset part of the stress generated by the temperature on the bridge, which can better protect the bridge; in the earthquake state, the damping force generated can also reduce the impact caused by the earthquake, and better protect the bridge. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 The utility model is a schematic structural diagram of the longitudinal vibration suppression support for the floating system along the bridge direction.

[0031] Figure 2 It is a schematic structural diagram of the transverse direction of the longitudinal vibration suppression support for the floating system described in the utility model.

[0032] Icon: 1-upper support plate, 2-top plate stainless steel plate, 3-circular sealing ring, 4-friction plate, 5-middle steel plate, 6-rubber plate, 7-guide stainless steel bar, 8-guide plate, 9-copper ring, 10-bottom basin, 11-anchor bolt, 12-anchor sleeve, 13-anchor rod. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] Example 1

[0035] like Figure 1 and Figure 2As shown, this embodiment proposes a longitudinal vibration suppression support for a floating system, including an upper support plate 1, a top plate stainless steel plate 2, a circular sealing ring 3, a friction plate 4, an intermediate steel plate 5, a rubber plate 6, a copper ring 9, a bottom basin 10, an anchor bolt 11, an anchor sleeve 12 and an anchor rod 13.

[0036] Among them, the upper support plate 1 is connected to the bottom of the bridge beam, and the top plate stainless steel plate 2 is welded to the bottom surface of the upper support plate 1 as a sliding surface; the friction plate 4 and the circular sealing ring 3 are installed in the groove on the top surface of the middle steel plate 5, the diameter of the circular sealing ring 3 is larger than the diameter of the friction plate 4, and is assembled on the outside of the friction plate 4 to play a sealing role; the top surfaces of the friction plate 4 and the circular sealing ring 3 are in contact with the top plate stainless steel plate 2, and the friction plate 4 and the top plate stainless steel plate 2 form a group of sliding pairs.

[0037] The friction plate 4 can be made of polymer material with a high friction coefficient or other friction materials.

[0038] The intermediate steel plate 5 is directly placed on the rubber plate 6, and the rubber plate 6 and the intermediate steel plate 5 are placed in the bottom basin 10. A circle of rubber plate notch grooves is provided on the top edge of the rubber plate 6, and the copper ring 9 is placed in the rubber plate notch groove, and the copper ring 9 is used to seal the basin cavity of the bottom basin 10.

[0039] The anchor bolts 11, the anchor sleeves 12 and the anchor rods 13 are installed at the anchor holes on the upper support plate 1 and the bottom basin 10, and the anchor bolts 11, the anchor sleeves 12 and the anchor rods 13 form the anchor assembly part of the support.

[0040] When the support is a unidirectional movable support, a guide stainless steel bar 7 is welded on the inner side of the block of the upper support plate 1, and a guide plate 8 is connected to the outer side of the middle steel plate 5. The guide stainless steel bar 7 and the guide plate 8 are combined into a unidirectional guide sliding surface, and the middle gap meets the design requirements of the support.

[0041] When the support is a multi-directional movable and fixed support, the guide stainless steel bar 7 and the guide plate 8 are not configured on the support, the multi-directional movable support has no block to limit the displacement in the longitudinal and transverse directions, and the fixed support is provided with an annular block to limit the displacement in the longitudinal and transverse directions.

[0042] During the normal traffic process of the bridge, the passage of vehicles will generate a certain impact force on the bridge, which will cause the beam body to move. In order to effectively suppress the impact force generated by the passage of vehicles on the bridge, the utility model replaces the flat slide plate in the support with a friction plate 4 with a larger friction coefficient. After being pressed by the dead weight of the bridge, the support can provide damping force from all directions to the beam body. The size of the damping force can be selected by selecting the material of the friction plate. When the impact force is generated from one direction, the force is transmitted to the support through the beam body. At this time, the beam body drives the upper support plate 1 to move, and a relative displacement is generated between the upper support plate 1 and the friction plate 4. The friction coefficient of the friction plate 4 is large, and the friction force generated is also large. At this time, the opposite direction of the action force (impact force) and the reaction force (friction force) will offset a large part, so that the impact force generated by the passage of vehicles on the bridge can be effectively suppressed, and the movement of the bridge can be effectively suppressed. At the same time, when the bridge is at high or low temperatures, the beam will expand and contract. The displacement generated at this time is the temperature displacement. At this time, the friction plate 4 will also generate a reaction force to offset part of the stress generated by the temperature on the bridge, which can better protect the bridge. Similarly, when an earthquake strikes the beam, the support can also provide a certain damping force to reduce the impact force, reduce the damage to the bridge, and play a certain protective role on the bridge.

[0043] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A longitudinal vibration suppression support for a floating system, characterized in that: It includes an upper structure and a lower structure. The upper structure includes an upper support plate and an intermediate steel plate located therebelow. The bottom surface of the upper support plate is fixedly connected with a metal plate. A friction plate is installed on the top of the intermediate steel plate. The friction plate and the metal plate form a set of sliding pairs. The friction coefficient of the friction plate is 0.1-0.

3.

2. The longitudinal vibration suppression support for a floating system according to claim 1, characterized in that: The friction plate is made of a polymer material plate or a metal material plate.

3. The longitudinal vibration suppression support for a floating system according to claim 1, characterized in that: The lower structure includes a rubber plate and a bottom basin, the middle steel plate is placed on the rubber plate, and the middle steel plate and the rubber plate are installed in the bottom basin.

4. The longitudinal vibration suppression support for a floating system according to claim 3, characterized in that: A circle of rubber plate notch grooves is arranged on the top edge of the rubber plate, and a sealing ring is installed in the rubber plate notch grooves.

5. The longitudinal vibration suppression support for a floating system according to claim 4, characterized in that: The sealing ring is a copper ring.

6. The longitudinal vibration suppression support for a floating system according to claim 1, characterized in that: The metal plate is a top plate stainless steel plate.

7. The longitudinal vibration suppression support for a floating system according to claim 1, characterized in that: When the support is a one-way movable support, a guide bar is installed on the inner side of the stopper of the upper support plate, and a guide plate is installed on the outer side of the middle steel plate, and the guide bar and the guide plate are slidably connected.

8. The longitudinal vibration suppression support for a floating system according to claim 1, characterized in that: The friction plate is installed in the groove on the top surface of the middle steel plate. A sealing ring is installed on the outer periphery of the friction plate, and the sealing ring is also installed in the groove on the top surface of the middle steel plate.

9. The longitudinal vibration suppression support for a floating system according to claim 4, characterized in that: Anchor bolts, anchor sleeves and anchor rods are installed at the anchor holes on the upper support plate and the bottom basin.

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