An assembled graded energy dissipation bridge bearing

Abstract

The present invention discloses an assembled graded energy-absorbing bridge bearing, which includes a bearing body and a detachably assembled energy-absorbing component, and a connecting plate is arranged on the side of the bottom of the bearing body. The energy-absorbing component includes a sliding limit plate, and at least one arc-shaped energy-absorbing structure is fixed on the side of the sliding limit plate; the energy-absorbing component is symmetrically fixed on both sides of the bearing body by shear bolts; the connecting plate and the energy-absorbing component are connected by a detachable connecting shaft. A slide groove parallel to its long side is arranged on the connecting plate, and a connecting hole matching the slide groove is arranged on the sliding limit plate, which is assembled and connected to the connecting plate by a connecting shaft; the sliding limit plate can move freely along the slide groove. This scheme realizes the limit constraint of the bearing under static working conditions such as automobile load and pulsating wind by arranging a limit energy-absorbing device between the bottom basin of the bearing body and the upper seat plate, thereby reducing the displacement of the main beam; under the action of rare earthquake dynamic working conditions, the shear bolts are cut off, and the arc-shaped energy-absorbing structure undergoes plastic deformation, thereby realizing the shock-absorbing and energy-absorbing function of the bearing.

Description

Technical Field

[0001] The invention relates to the field of bridge construction, and in particular to an assembled graded energy-absorbing bridge bearing. Background Art

[0002] As the joint of the bridge, the bridge bearing can effectively transmit the vertical load and horizontal load of the bridge superstructure, and can adapt to the free deformation and rotation of the main beam. Steel bearings such as pot bearings and ball bearings have the advantages of simple structure, clear force, good economy, etc., and are widely used in large and medium span bridge projects.

[0003] The study found that during the service of bridges, ordinary pot-type bearings and spherical bearings have the following main deficiencies or defects: First, the limit direction of the one-way bearing and the fixed bearing cannot release the displacement. As a consolidation method, the limit direction of the bearing transmits the horizontal force downward under the action of high-intensity earthquakes, increasing the stress on the bridge substructure; second, the damping energy dissipation capacity of the one-way bearing and the two-way bearing in the sliding direction is relatively small. There is no damping force in the sliding direction of the bearing, and the horizontal hysteresis envelope area is small, resulting in weak damping energy dissipation capacity of the bearing, which cannot play a significant shock-absorbing and energy-absorbing function; third, the one-way bearing and the two-way bearing do not have the function of preventing beams from falling, and the shear device of the spherical bearing and pot bearing with increased seismic isolation function cannot be quickly replaced after being cut off, which increases the maintenance cost of the bridge bearing during the service stage. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the assembled graded energy-absorbing bridge bearing provided by the present invention solves the problem of insufficient shock-absorbing capacity of the existing bridge bearings.

[0005] In order to achieve the above-mentioned object of the invention, the technical solution adopted by the present invention is:

[0006] Provided is an assembled graded energy-absorbing bridge bearing, which includes a bearing body and a detachable energy-absorbing component; a connecting plate is arranged on the side of the bottom of the bearing body. The energy-absorbing component includes a sliding limit plate, at least one arc-shaped energy-absorbing structure is fixed on the side of the sliding limit plate, and a plurality of through holes for installing shear bolts are opened on the sliding limit plate; the energy-absorbing component is symmetrically fixed on opposite sides of the bearing body by shear bolts; and the connecting plate is slidably connected to the energy-absorbing component.

[0007] The beneficial effects of the present invention are as follows: compared with the bearings in the prior art, the assembled graded energy-absorbing bridge bearings of this scheme allow the upper seat plate to slide freely within a limited range through the connecting plate; it also has a multi-stage limiting energy-absorbing component: the shear bolts are protective components when the bridge is subjected to static working conditions. When the horizontal force is large, the shear bolts are sheared off, and the arc-shaped energy-absorbing structure can further exert the energy-absorbing and buffering functions, and the energy-absorbing components can be directly disassembled and replaced after being damaged, thereby reducing the maintenance cost of the bridge while ensuring the shock-absorbing and energy-absorbing properties of the bridge bearings.

[0008] Furthermore, the support body includes a base basin, a spherical skateboard, a ball crown, a plane skateboard and an upper seat plate; the spherical skateboard is fixed on the concave spherical surface of the base basin, and the ball crown is installed on the surface of the spherical skateboard; the plane skateboard is fixed on the plane of the ball crown; the upper seat plate is installed on the surface of the plane skateboard; the ball crown equipped with the spherical skateboard rotates with the base basin through the concave spherical surface of the spherical skateboard; the connecting plate is installed on the side of the base basin; the shear bolts connect the anti-drop beam block at the bottom of the upper seat plate with the energy-absorbing component.

[0009] Furthermore, a sliding groove parallel to its long side is opened on the connecting plate, and a connecting shaft matching with the sliding groove is provided on the surface of the sliding limit plate, and the connecting shaft is assembled and connected with the sliding limit plate; the sliding limit plate can reciprocate along the sliding groove.

[0010] In the prior art, bridge maintenance units often need to dismantle and replace the entire bridge support. In this solution, after removing the connecting shaft, shear bolts and high-strength bolts, the energy-consuming components can be directly taken out from the side, thereby realizing the rapid and convenient replacement of the vulnerable components of the bridge and reducing the maintenance cost of the bridge. The gap between the slideway and the connecting shaft can realize the longitudinal displacement of the bridge under the influence of temperature, vehicle braking force, pulsating wind, etc.; the assembly gap between the slideway in the middle of the sliding connecting plate and the non-sliding direction of the connecting shaft releases the temperature displacement of the main beam in the transverse direction, thereby reducing the additional stress of the main beam caused by temperature.

[0011] Furthermore, the assembled graded energy-absorbing bridge bearing also includes an anti-falling beam block, which is assembled on the upper base plate by a number of high-strength bolts. The energy-absorbing component is assembled in the middle of the anti-falling beam block by shear bolts. The anti-falling beam block can be regarded as an anti-falling beam protection device at the edge of the upper base plate, which limits the bearing from sliding further when a large displacement occurs, and prevents the upper base plate from partially or completely separating from the bearing body and causing the risk of falling beams.

[0012] Furthermore, the energy dissipation component is provided with two or more arc-shaped energy dissipation structures. The shape of the arc-shaped energy dissipation structure can be any one of 1 / 2 circle, 3 / 4 circle, U-shaped or double "U" shape. The arc-shaped structure can evenly withstand external forces from multiple directions, which helps to improve the shock absorption capacity of the arc-shaped energy dissipation structure.

[0013] Furthermore, steps are provided on both sides or around the bottom of the upper seat plate, and the anti-falling beam stopper cooperates with the steps. The steps can further transmit the force on the upper seat plate to the anti-falling beam stopper. If the steps are not provided, most of the lateral shear force will be directly applied to the bolts, which may weaken the limiting ability of the anti-falling beam stopper. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The axonometric drawing of the prefabricated graded energy-absorbing bridge bearing after inversion and partial sectioning;

[0015] Figure 2 It is the left view of the assembled graded energy dissipation bridge bearing after partial section;

[0016] Figure 3 It is a top view of the energy dissipation components of the assembled graded energy dissipation bridge support;

[0017] Figure 4 It is a top view of the bottom basin and the connection plate of the assembled graded energy dissipation bridge bearing;

[0018] In the figure, 100-bottom basin, 101-spherical slide plate, 102-spherical crown, 103-plane slide plate, 2-upper seat plate, 301-arc energy dissipation structure, 302-shear bolt, 303-sliding limit plate, 4-anti-fall beam stopper, 401-high-strength bolt, 5-connecting plate, 501-slide groove, 6-connecting shaft. DETAILED DESCRIPTION

[0019] The specific implementation modes of the present invention are described below so that those skilled in the art can understand the present invention. However, it should be clear that the present invention is not limited to the scope of the specific implementation modes. For those of ordinary skill in the art, as long as various changes are within the spirit and scope of the present invention as defined and determined by the attached claims, these changes are obvious, and all inventions and creations utilizing the concept of the present invention are protected.

[0020] like Figure 1 As shown, the present scheme provides an assembled graded energy-absorbing bridge bearing, which includes a bearing body and a detachable energy-absorbing component; a connecting plate 5 for connecting is arranged on the bottom side of the bearing body; the energy-absorbing component includes a sliding limit plate 303, at least one arc-shaped energy-absorbing structure 301 is arranged on the side of the sliding limit plate 303, and a plurality of through holes for installing shear bolts 302 are opened on the sliding limit plate 303; the energy-absorbing component is symmetrically fixed on the opposite sides of the bearing body by shear bolts 302; the connecting plate 5 is slidably connected to the energy-absorbing component.

[0021] Compared with the bearings in the prior art, the assembled graded energy-absorbing bridge bearing of this solution allows the upper seat plate 2 to slide freely within a limited range through the connecting plate 5. This embodiment also has a multi-stage limiting energy-absorbing component: the shear bolt 302 is a limiting component when the bridge is subjected to static working conditions. When the horizontal force is large, the shear bolt 302 is sheared off, and the arc-shaped energy-absorbing structure 301 can further play the energy-absorbing and buffering functions, and the energy-absorbing component can be directly disassembled and replaced after being damaged, which reduces the maintenance cost of the bridge while ensuring the shock absorption and energy consumption of the bridge bearing.

[0022] like Figure 1 and Figure 2As shown, the support body includes a base 100, a spherical skateboard 101, a spherical crown 102, a plane skateboard 103 and an upper seat plate 2; the spherical skateboard 101 is fixed on the concave spherical surface of the base 100, and the spherical crown 102 is installed on the surface of the spherical skateboard 101; the plane skateboard 103 is fixed on the plane of the spherical crown 102; the upper seat plate 2 is installed on the surface of the plane skateboard 103; the spherical crown 102 equipped with the spherical skateboard 101 is slidably connected to the base 100 through the concave spherical surface of the spherical skateboard 101; the connecting plate 5 is installed on the side of the base 100; the shear bolt 302 connects the anti-fall beam stopper 4 at the bottom of the upper seat plate 2 with the energy dissipation component.

[0023] like Figure 3 and Figure 4 As shown, the connecting plate 5 is provided with a slide groove 501 parallel to its long side, and the sliding limit plate 303 is provided with a connecting hole matched with the slide groove 501, and the connecting hole is connected to the connecting plate 5 through the connecting shaft 6; the sliding limit plate 303 can reciprocate along the slide groove 501. In addition, there is an assembly gap between the connecting shaft 6 and the slide groove 501 in the non-sliding direction. The gap between the slide groove 501 and the connecting shaft 6 can realize the longitudinal displacement of the bridge under the influence of temperature, vehicle braking force, pulsating wind, etc.; the assembly gap between the slide groove 501 in the middle of the sliding limit plate 303 and the non-sliding defense line of the connecting shaft 6 releases the temperature displacement of the main beam, thereby reducing the additional stress of the main beam caused by the temperature.

[0024] In the prior art, bridge maintenance units often need to dismantle and replace the entire bridge support. In this solution, after the staff removes the connecting shaft 6, the shear bolts 302 and the high-strength bolts 401, they can directly take out the energy-absorbing components from the side, thereby achieving fast and convenient replacement of vulnerable components of the bridge and reducing the maintenance cost of the bridge.

[0025] like Figure 2 As shown, the assembled graded energy-absorbing bridge bearing of this embodiment further includes an anti-falling beam stopper 4, which is assembled on the upper seat plate 2 by a plurality of high-strength bolts 401; the energy-absorbing assembly is assembled on the anti-falling beam stopper 4 by shear bolts 302. The anti-falling beam stopper 4 can be regarded as an anti-falling beam protection device at the edge of the upper seat plate 2, which limits the bearing from continuing to slide when a large displacement occurs on the bridge deck, and prevents the upper seat plate 2 from partially or completely separating from the bearing body and causing the risk of falling beams.

[0026] like Figure 3 As shown, the energy dissipation component is provided with two or more arc-shaped energy dissipation structures 301. The shape of the arc-shaped energy dissipation structure 301 is 1 / 2 circle. The arc-shaped structure can evenly withstand external forces from multiple directions, which helps to improve the shock absorption capacity of the arc-shaped energy dissipation structure 301.

[0027] In this embodiment, steps are provided on both sides or around the bottom of the upper seat plate 2, and the anti-falling beam stopper 4 cooperates with the steps. The steps can further transmit the force on the upper seat plate 2 to the anti-falling beam stopper 4. If the steps are not provided, most of the lateral shear force will be directly applied to the bolts, which may weaken the limiting ability of the anti-falling beam stopper 4.

[0028] In summary, this scheme can realize the limit constraint of the bearing under static working conditions such as temperature, vehicle load, and pulsating wind by setting a limit energy dissipation device between the bottom basin and the upper seat plate of the bearing body, thereby reducing the displacement of the main beam; under the action of rare earthquake dynamic conditions, the shear bolts are sheared off, and the energy dissipation structure undergoes damping energy dissipation deformation, thereby realizing the shock-absorbing and energy-dissipating function of the bearing.

Claims

1. An assembled graded energy dissipation bridge bearing, characterized in that: The invention comprises a support body and a detachably assembled energy-absorbing component; a connecting plate (5) having a connecting function is arranged on the side of the bottom of the support body; the energy-absorbing component comprises a sliding limit plate (303), at least one arc-shaped energy-absorbing structure (301) is arranged on the side of the sliding limit plate (303), and a plurality of through holes for installing shear bolts (302) are opened on the sliding limit plate (303); the energy-absorbing component is symmetrically fixed on opposite sides of the support body by shear bolts (302); and the connecting plate (5) is slidably connected to the energy-absorbing component.

2. The assembled graded energy dissipation bridge bearing according to claim 1, characterized in that: The support body comprises a base (100), a spherical slide plate (101), a spherical crown (102), a plane slide plate (103) and an upper seat plate (2); the spherical slide plate (101) is fixed on the concave spherical surface of the base (100), and the spherical crown (102) is mounted on the surface of the spherical slide plate (101); the plane slide plate (103) is fixed on the plane of the spherical crown (102); the upper seat plate (2) is mounted on the surface of the plane slide plate (103); the spherical crown (102) mounted with the spherical slide plate (101) is slidably connected to the base (100) via the concave spherical surface of the spherical slide plate (101); the connecting plate (5) is mounted on the side of the base (100); and the shear bolts (302) connect the upper seat plate (2) to the energy dissipation component.

3. The assembled graded energy dissipation bridge bearing according to claim 2, characterized in that: The connecting plate (5) is provided with a slide groove (501) parallel to its long side, and the surface of the sliding limit plate (303) has a connecting shaft (6) that cooperates with the slide groove (501), and the connecting shaft (6) is assembled and connected to the sliding limit plate (303); the sliding limit plate (303) can reciprocate along the slide groove (501).

4. The assembled graded energy dissipation bridge bearing according to claim 3, characterized in that: An assembly gap is provided between the connecting shaft (6) and one side of the sliding groove (501).

5. The assembled graded energy dissipation bridge bearing according to claim 2, characterized in that: It also includes an anti-falling beam stopper (4), which is assembled on the upper seat plate (2) via a plurality of high-strength bolts (401); and the energy dissipation component is assembled in the middle of the anti-falling beam stopper (4) via shear bolts (302).

6. The assembled graded energy dissipation bridge bearing according to claim 5, characterized in that: The energy dissipation component is provided with two or more arc-shaped energy dissipation structures (301).

7. The assembled graded energy dissipation bridge bearing according to claim 6, characterized in that: The shape of the arc-shaped energy dissipation structure (301) is any one of a 1 / 2 circle, a 3 / 4 circle, a U shape or a double "U" shape.

8. The assembled graded energy dissipation bridge bearing according to claim 5, characterized in that: Steps are arranged on both sides or around the bottom of the upper seat plate (2), and the anti-falling beam stopper (4) cooperates with the steps.

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