Cylindrical surface tension and compression support for bridge deck system

Abstract

The invention belongs to the technical field of bridge supports, and discloses a cylindrical surface tension and compression support for a bridge deck system, which comprises an upper seat plate, a lower seat plate, a middle body, a cylindrical surface sliding plate and a cylindrical surface sliding block, L-shaped limiting stop blocks are symmetrically processed on the bottom surface of the upper seat plate, and the two L-shaped limiting stop blocks form a limiting through groove; a T-shaped seat extending into the limiting through groove is machined on the surface of the lower seat plate, an arch-shaped groove is machined in the bottom of the side wall of the T-shaped seat, the cylindrical surface sliding block is installed in the arch-shaped groove, an arc-shaped groove is machined in the middle of the surface of the T-shaped seat, the middle body is arranged in the arc-shaped groove, a limiting groove is machined on the surface of the middle body, the cylindrical surface sliding plate is installed in the limiting groove, and the friction sliding plate is installed on the cylindrical surface sliding plate. The L-shaped limiting stop block and the T-shaped seat are respectively processed on the upper seat plate and the lower seat plate, so that the upper seat plate and the lower seat plate can form a buckling connection structure, not only is the integrity of the support improved, but also the material thickness of the limiting stop block and the T-shaped seat can be ensured, and the anti-deformation effect of the support under the tensile working condition is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of bridge supports, and in particular relates to a columnar tension and compression support for a bridge deck system. Background Art

[0002] The existing bridge deck bearings mainly include the following categories: plate rubber bearings, pot rubber bearings, spherical bearings, tension-compression pot bearings, and cylindrical tension-compression bearings. However, each has design and usage defects that are difficult to overcome.

[0003] Plate rubber bearing: a bridge bearing made of multiple layers of natural rubber and thin steel plates inlaid, bonded and vulcanized. It only has the function of transmitting pressure vertically in the direction of force. When receiving vertical tension, the bearing will become empty and cause slapping between the bridge and the structure. At the same time, the plate rubber bearing can only transmit a small structural horizontal force, and the bearing will be over-sheared and empty at the maximum displacement and deflection position of the expansion joint. The problems of the plate rubber bearing are also reflected in: it is difficult to fix it at the design value point during installation, and it is easy to move its position. In severe cases, the bearing often falls under the bridge, causing abnormal damage to the bridge structure.

[0004] Pot-type rubber bearing: It is a new type of bridge bearing composed of steel components and rubber. It has the characteristics of large load-bearing capacity, large horizontal displacement and flexible rotation. However, although it has improved the horizontal force-bearing capacity and displacement and rotation capacity, it still lacks the ability to transmit vertical tension, and the gap contact slapping phenomenon will still occur.

[0005] Spherical bearing: It is a new type of bridge bearing developed on the basis of pot-type rubber bearing. The spherical bearing no longer uses rubber to bear pressure, and there is no impact of rubber hardening or aging. It is suitable for low temperature areas. However, although the spherical bearing further improves the horizontal force bearing capacity and displacement and rotation capacity, it still lacks the ability to transmit vertical tension, and the gap contact slapping phenomenon will still occur.

[0006] Tension-compression pot-type bearing: It is a combination of split components based on the pot-type rubber bearing, which solves the problems of standard non-tension bearings. However, since it is a combination of split components, when subjected to dynamic loads such as vehicle fatigue loads, the bearing connection parts are prone to loosening, breaking and falling off. In addition, the bearing has a large size in the lateral position of the bridge, resulting in the lateral connection size often exceeding the design requirements of the bridge.

[0007] Cylindrical tension and compression support: It adopts a split structure in which the upper seat plate 1, the intermediate body 3 and the lower seat plate 6 are overlapped in sequence. An upper tensile stopper 4 and a lower tensile stopper 8 are installed on one side of the intermediate body 3. The surface and bottom of the intermediate body 3 are connected to the upper seat plate 1 and the lower seat plate 6 respectively through a flat slide 2 and a cylindrical slide 7. Figure 1 、 Figure 2As shown, although this structure solves the problem of the lateral connection size exceeding the design limit value of the bridge, the structural composition of the support is still a combination of split components. When the bridge is subjected to dynamic load impact, the support connection components are prone to loosening, breaking and falling off; in addition, high-strength bolts are used to connect the upper tensile stop block 4 and the lower tensile stop block 8 and the upper seat plate 1 and the lower seat plate 6. The bolts are in a complex stress condition of tension, horizontal shear, bending and torque for a long time, and are prone to loosening and fatigue failure, resulting in damage and falling off of the bolts and blocks; and the structural design of the upper tensile stop block and the lower tensile stop block is unreasonable, resulting in insufficient thickness and strength of the upper tensile stop block and the lower tensile stop block, resulting in bending and deformation of the blocks under tensile working conditions; when the cooperation structure of the two sides of the intermediate body 3 with the upper tensile stop block 4 and the lower tensile stop block 8 responds to the movement of the lateral guide block, the impact force effect increases after excessive lifting between the upper seat plate 1 and the lower seat plate 6, and the friction slide is easily damaged when resetting.

[0008] In summary, it is necessary to solve the problems of large gaps in existing bridge supports, many parts, and easy dislocation and disengagement under complex stress conditions. Summary of the Invention

[0009] The purpose of the present invention is to solve the problems in the background technology and provide a column tension and compression bearing for a bridge deck system.

[0010] The purpose of the present invention is achieved through the following technical solutions: A cylindrical tension and compression bearing for a bridge deck system, comprising an upper seat plate, a lower seat plate, an intermediate body, a cylindrical slide plate and a cylindrical slider, wherein the bottom surface of the upper seat plate is symmetrically processed with L-shaped limit blocks, and the two L-shaped limit blocks and the upper seat plate form a limit groove, and the surface of the lower seat plate is processed with a T-shaped seat extending into the limit groove, and the convex edges on both sides of the T-shaped seat extend into the limit groove and are located above the bent portion of the limit block, and the bottom of the side wall of the T-shaped seat close to the limit block is reinforced. The machine has an arched groove that is adapted to the surface contour of the cylindrical slider. The cylindrical slider is installed in the arched groove, and the bottom surface of the cylindrical slider is placed on the surface of the bent portion of the limit block. The middle part of the T-shaped seat surface is processed with an arc groove that is adapted to the bottom contour of the intermediate body. The intermediate body is placed in the arc groove, and the surface of the intermediate body is processed with a limiting groove for accommodating the cylindrical slider. The cylindrical slider is installed in the limiting groove, and a friction slider is also installed between the cylindrical slider and the inner bottom surface of the upper seat plate in the limiting groove.

[0011] The axis lines of the arched groove and the arc groove are perpendicular to the length direction of the limiting through groove.

[0012] The upper seat plate is provided with bolt holes connected to the bridge, and the lower seat plate is provided with bolt holes connected to the support.

[0013] The column tension and compression bearing for a bridge deck system provided by the present invention has the following beneficial effects: (1) By processing L-shaped limit blocks and T-shaped seats on the upper and lower seat plates respectively, the upper and lower seat plates can form a buckle-connected structure, which not only improves the integrity of the support, but also ensures the material thickness of the limit blocks and T-shaped seats, and increases the anti-deformation effect of the support under tensile conditions; (2) The integrally formed upper seat plate and limit block and the integrally formed lower seat plate and T-shaped seat eliminate the need for high-strength bolts in traditional cylindrical tension and compression supports. The complex torsional force that the screws have to bear acts directly on the upper and lower seat plates, greatly improving the impact resistance of the support. (3) The T-shaped seat is installed in the space between the two limit blocks, which solves the problem of excessive gap in the existing cylindrical tension and compression supports. There is no need to worry about the friction slide being easily dislocated and damaged during resetting during lateral movement; (4) The L-shaped limit block and T-shaped seat enable the upper and lower seat plates to form a buckled structure, which greatly improves the vertical tensile strength of the support. (5) The cylindrical slider greatly reduces the gap between the limit block and the T-shaped seat. When subjected to vertical tension, it can effectively reduce the impact force after lifting. At the same time, it can prevent the friction slide from falling out when combined with the pad, thus ensuring the stability of the support. (6) The gap between the supports is small, which solves the problem of excessive shearing and emptying of the supports at the maximum displacement and deflection position of the expansion joint end. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0015] Figure 1 This is a schematic diagram of the transverse bridge structure of a column tension and compression support in the prior art.

[0016] Figure 2 This is a schematic structural diagram of the longitudinal bridge direction of the column tension and compression support in the prior art.

[0017] Figure 3 This is a schematic structural diagram of the support disclosed in the embodiment of the patent of this invention.

[0018] Figure 4 This is a schematic diagram of the exploded structure of the support disclosed in the embodiment of the patent of this invention.

[0019] Figure 5 This is a schematic diagram of the transverse structure of the bridge disclosed in the embodiment of the patent of this invention.

[0020] Figure 6 This is a schematic diagram of the vertical and horizontal structures disclosed in the embodiments of the present invention.

[0021] Markings in the figure: 1, upper seat plate; 11, limit block; 12, bending part; 2, lower seat plate; 21, T-shaped seat; 22, arched groove; 23, arc groove; 3, intermediate body; 31, limit groove; 4, cylindrical slide; 5, cylindrical slider; 6, friction slide; 7, bolt hole. DETAILED DESCRIPTION

[0022] like Figures 3 to 6As shown, the cylindrical tension and compression bearing for the bridge deck system provided in this embodiment includes an upper seat plate 1, a lower seat plate 2, an intermediate body 3, a cylindrical slide plate 4 and a cylindrical slider 5. The bottom surface of the upper seat plate 1 is symmetrically processed with L-shaped limit blocks 11. The two L-shaped limit blocks 11 and the upper seat plate 1 form a limit groove. The surface of the lower seat plate 2 is processed with a T-shaped seat 21 extending into the limit groove. The convex edges on both sides of the T-shaped seat 21 extend into the limit groove 31 and are located above the bent portion 12 of the limit block 11. The convex edge of the T-shaped seat 21 and the L-shaped limit block 11 form a buckling structure. Compared with the traditional support, the tensile part of the support greatly saves the structural space inside the support, and at the same time can ensure the structural strength of the limit block 11 and the T-shaped seat 21 as the tensile part. At the same time, this buckle structure can also increase the thickness of the limit block 11 and the T-shaped seat 21, so that the strength of the tensile part is increased and it can cope with greater torsion. In addition, the limit block 11 is integrally formed with the upper seat plate 1, and the T-shaped seat is integrally formed with the lower seat plate 2, eliminating the traditional bolt connection. The complex forces of tensile strength, horizontal shear strength, bending moment and torque of the traditional bolts are directly applied to the upper seat plate 1 and the lower seat plate 2. The impact resistance of the support is greatly improved; the bottom of the side wall of the T-shaped seat 21 close to the limit block 11 is processed with an arched groove 22 that matches the surface contour of the cylindrical slider 5, and the cylindrical slider 5 is installed in the arched groove 22, and the bottom surface of the cylindrical slider 5 is placed on the surface of the bent portion 12 of the limit block 11, which is equivalent to the cylindrical slider 5 being located between the buckling structures, so that the gap between the limit block 11 and the T-shaped seat 21 can be less than 1 mm. When the support is subjected to vertical tension, under the action of the cylindrical slider 5, the impact force after the bridge deck is lifted off can be effectively reduced; the middle part of the surface of the T-shaped seat is processed with the middle The bottom surface contour of the body 3 is adapted to the arc groove 23, and the intermediate body 3 is placed in the arc groove 23. The axial center lines of the arched groove 22 and the arc groove 23 are perpendicular to the length direction of the limiting groove. With this design, the support can have a maximum displacement position, thereby improving the flexibility of the support; the surface of the intermediate body 3 is processed with a limiting groove 31 for accommodating the cylindrical slide 4, and the cylindrical slide 4 is installed in the limiting groove 31. A friction slide 6 is also installed between the cylindrical slide 4 and the inner bottom surface of the upper seat plate 1 in the limiting groove. The friction slide 6 can not only reduce the gap in the support, but also prevent it from moving up and down when subjected to vertical tension.

[0023] In order to facilitate the installation of the support, the upper seat plate 1 is provided with a bolt hole 7 connected to the bridge, and the lower seat plate 2 is provided with a bolt hole 7 connected to the support.

[0024] The method of use of the present invention is: When the bridge deck is subjected to a force in the direction of the bridge, the upper seat plate 1 moves unidirectionally along with the bridge deck, and the limit block 11 on the upper seat plate 1 limits the lateral displacement of the bridge deck.

[0025] When the bridge deck is subjected to rotational force, the upper seat plate 1 and the intermediate body 3 rotate with the bridge deck. When the intermediate body 3 rotates, the cylindrical slider 5 provided between the limit block 11 and the lower seat plate 2 follows the rotation to prevent the limit block 11 of the upper seat plate 1 and the T-shaped seat 21 of the lower seat plate 2 from getting stuck. Because the cylindrical slider 5 is opposite the curved surface of the intermediate body 3, it can ensure that the spacing between the upper seat plate 1 and the lower seat plate 2 is consistent, thereby ensuring the stability of the support height, and preventing the bridge deck from reducing its anti-torque effect due to changes in the support height when the bridge deck rotates. At the same time, the cylindrical slider 5 can also reduce the height of the upper seat plate 1 when the support is subjected to vertical tension, thereby preventing the cylindrical slide 4 from dislodging when the upper seat plate 1 is lifted upward, and preventing the cylindrical slide 4 from being dislocated and damaged after the support is reset. It also can buffer part of the impact force between the limit block 11 and the T-shaped seat 21.

[0026] The support disclosed in this patent reduces the block gap reserved for the support when it rotates horizontally through the cylindrical slider 4, avoiding the increase in the distance between the limit block 11 and the T-shaped seat 21 when the support is subjected to vertical tension, and can avoid excessive impact force between the limit block 11 and the T-shaped seat, effectively ensuring the safety of the support; at the same time, the reduced gap can also reduce the lifting height of the upper seat plate 1 when the support is subjected to vertical tension, preventing the upper part of the support from being lifted off too high, causing the friction slide 6 to fall off, and the cylindrical slide 4 to be dislocated and damaged.

[0027] The above description is only a preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any modification and replacement based on the technical solution and inventive concept provided by the present invention should be covered by the protection scope of the present invention.

Claims

1. A cylindrical tension and compression bearing for a bridge deck system, comprising an upper seat plate (1), a lower seat plate (2), an intermediate body (3), a cylindrical slide plate (4) and a cylindrical slider (5), characterized in that: The bottom surface of the upper seat plate (1) is symmetrically processed with L-shaped limit blocks (11), and the two L-shaped limit blocks (11) and the upper seat plate (1) form a limit groove. The surface of the lower seat plate (2) is processed with a T-shaped seat (21) extending into the limit groove. The convex edges on both sides of the T-shaped seat (21) extend into the limit groove (31) and are located above the bent portion (12) of the limit block (11). The bottom of the side wall of the T-shaped seat (21) close to the limit block (11) is processed with an arched groove (22) adapted to the surface contour of the cylindrical slider (5). The cylindrical slider (5) is installed in the arched groove (22), and the bottom surface of the cylindrical slider (5) is placed on the surface of the bending portion (12) of the limit block (11), the middle part of the surface of the T-shaped seat (21) is processed with an arc groove (23) adapted to the bottom surface contour of the intermediate body (3), the intermediate body (3) is placed in the arc groove (23), and the surface of the intermediate body (3) is processed with a limit groove (31) for accommodating the cylindrical slide (4), the cylindrical slide (4) is installed in the limit groove (31), and a friction slide (6) is also installed between the cylindrical slide (4) and the inner bottom surface of the upper seat plate (1) in the limit groove.

2. The columnar tension and compression bearing for a bridge deck system according to claim 1, characterized in that: The axis lines of the arched groove (22) and the arc groove (23) are perpendicular to the length direction of the limiting through groove.

3. The column tension and compression bearing for a bridge deck system according to claim 1, characterized in that: The upper seat plate (1) is provided with bolt holes (7) connected to the bridge, and the lower seat plate (2) is provided with bolt holes (7) connected to the support.

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