A friction pendulum support with replaceable stopper

Abstract

The utility model provides a friction pendulum bearing with a replaceable stopper, which belongs to the technical field of bridge bearings. The bearing includes a spherical crown lining, an upper seat plate, a lower seat plate, a connecting block and a limit stopper. The spherical crown lining forms an upper spherical rotation pair and a lower spherical rotation pair with the upper seat plate and the lower seat plate respectively. Rectangular installation steps are provided at the edges on both sides of the limit direction of the lower end of the upper seat plate, and the length direction of the installation steps is perpendicular to the limit direction. The connecting block is adapted to the installation step, and the connecting block and the upper seat plate are connected as a whole by fastening bolts arranged in the limit direction. The limit stopper is located on the lower surface of the connecting block, arranged along the length direction of the connecting block, and the limit stopper and the connecting block are connected as a whole by a shear pin. The utility model can quickly replace the limit stopper after a positive earthquake, and the replacement is convenient and fast, and the construction cost is low.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge bearings, in particular to a friction pendulum bearing with replaceable stoppers. Background Art

[0002] In bridge projects, bridge bearings are key components that support the upper and lower structures of bridges. They have the function of transferring the loads generated by the upper structure to the lower structure. At the same time, they can meet the horizontal displacement, rotation and deformation of the bridge structure under the influence of factors such as temperature changes, concrete shrinkage, car impact, and earthquakes, thereby ensuring the safety of the bridge structure. Friction pendulum bearings are commonly used in engineering projects as bridge seismic isolation components. Under normal circumstances, they can meet the vertical and horizontal load-bearing, vertical displacement and rotation functions of the bridge. In earthquake situations, when the input horizontal force is greater than the shear force of the shear pin, the shear pin is sheared, the limit stopper fails to limit, and the bearing can swing freely in the horizontal direction, thereby reducing shock and consuming energy.

[0003] After an earthquake, when restoring the bearing, it is costly to replace the bearing. If only the limit block is replaced, the restoration operation will be difficult because the shear pin is partially broken inside the upper seat plate part and the operating space is small. Utility Model Content

[0004] The utility model aims to provide a friction pendulum support with replaceable stoppers, which can quickly replace the limit stoppers after a positive earthquake, and the replacement is convenient and fast with low construction cost.

[0005] The technical solution adopted by the utility model is:

[0006] A friction pendulum support with replaceable stopper, comprising:

[0007] A spherical crown lining plate, wherein the spherical crown lining plate is a hyperbolic structure;

[0008] An upper seat plate, wherein the middle area of ​​the lower end surface of the upper seat plate has a first spherical crown surface that matches the upper curved surface of the spherical crown lining plate, and forms an upper spherical rotation pair with the spherical crown lining plate; rectangular installation steps are provided at the edges on both sides of the limiting direction of the lower end of the upper seat plate, and the length direction of the installation steps is perpendicular to the limiting direction;

[0009] A connecting block, which is adapted to the mounting step and is connected to the upper seat plate as a whole by fastening bolts arranged in a limiting direction;

[0010] A limit stopper, which is located on the lower surface of the connecting block and arranged along the length direction of the connecting block, and is connected to the connecting block as a whole by a shear pin;

[0011] The lower seat plate has a second spherical crown surface in the middle area of ​​the upper end face of the lower seat plate, which cooperates with the lower curved surface of the spherical crown lining plate and forms a lower spherical rotation pair with the spherical crown lining plate; the two sides of the upper limit direction of the lower seat plate and the corresponding limit blocks form a guide sliding pair.

[0012] Furthermore, a slide groove is provided on the top surface of the installation step along its own length direction; and the shape of the connecting block is adapted to the combined structure of the installation step and the slide groove.

[0013] Furthermore, the slide groove is adjacent to the step side wall of the installation step, and the two form an "L"-shaped structure.

[0014] Furthermore, the length of the slide groove is consistent with the length of the installation step.

[0015] Furthermore, an upper spherical surface slide plate is provided between the upper seat plate and the spherical crown lining plate.

[0016] Furthermore, a lower spherical slide plate is provided between the spherical crown lining plate and the lower seat plate.

[0017] Furthermore, a beam-fall prevention stopper is provided at the edge of the first spherical crown surface.

[0018] Furthermore, a buffer ring is provided at the stop opening of the anti-falling beam.

[0019] Furthermore, the installation position of the shear pin does not intersect with the installation position of the fastening bolt.

[0020] The beneficial effects of the utility model are:

[0021] The utility model provides a friction pendulum bearing with replaceable stopper, which is composed of an upper seat plate, a ball crown lining plate and a lower seat plate. An installation step is provided on the upper seat plate, and a connecting block is fixed by a fastening bolt. The limit stopper is connected to the connecting block by a shear pin. In the utility model, a detachable connecting block is provided, and the limit stopper is connected to the upper seat plate via the connecting block. After a positive earthquake, the limit stopper can be quickly replaced, and the replacement is convenient and fast, and the construction cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is a front view of the friction pendulum support with replaceable stopper in this embodiment.

[0024] Figure 2 for Figure 1 AA section view.

[0025] Figure 3 It is a schematic diagram of the three-dimensional structure of the friction pendulum support with replaceable stopper in this embodiment.

[0026] Figure 4 for Figure 2 Schematic diagram of the local enlarged structure at point B in the middle.

[0027] Figure 5 It is a bottom view of the upper seat plate in this embodiment.

[0028] The accompanying drawings are marked as follows:

[0029] 100-ball crown lining, 200-upper seat plate, 300-lower seat plate, 400-connecting block, 500-limit stopper, 600-fastening bolt, 700-shear pin;

[0030] 110-upper spherical slide;

[0031] 210-first spherical crown surface, 220-installation step, 221-slide groove, 230-buffer ring;

[0032] 310- second spherical crown surface, 320- lower spherical slide plate. DETAILED DESCRIPTION

[0033] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0034] The disclosure below provides many different embodiments or examples to implement different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the present invention.

[0035] The embodiments of the utility model are described in detail below with reference to the accompanying drawings.

[0036] Figure 1 It is a front view of the friction pendulum support with replaceable stopper in this embodiment. Figure 2for Figure 1 AA section view. Figure 3 It is a schematic diagram of the three-dimensional structure of the friction pendulum support with replaceable stopper in this embodiment. Figure 4 for Figure 4 The partially enlarged structural diagram is shown in the figure. Figures 1 to 5 As shown in , the stopper replaceable friction pendulum bearing includes a spherical cap lining plate 100, an upper seat plate 200 and a lower seat plate 300. Among them, the spherical cap lining plate 100 is a convex hyperbolic structure. The upper seat plate 200 is integrated with the corresponding body through an anchoring assembly, and the middle area of ​​the lower end face thereof has a first spherical cap surface 210 that matches the upper curved surface of the spherical cap lining plate 100, and forms an upper spherical rotation pair with the spherical cap lining plate 100. The lower seat plate 300 is connected to the corresponding pier as a whole through an anchoring assembly, and the middle area of ​​the upper end face thereof has a second spherical cap surface 310 that matches the lower curved surface of the spherical cap lining plate 200, and forms a lower spherical rotation pair with the spherical cap lining plate 100. In this embodiment, the horizontal displacement function of the bearing is realized by the coordinated rotation of the upper spherical rotation pair and the lower spherical rotation pair. Figure 5 2 is a bottom view of the upper seat plate in this embodiment. In order to facilitate the replacement of the stopper in this embodiment, rectangular mounting steps 220 are provided at the edges of both sides of the lower end of the upper seat plate 200 in the limiting direction, and the length direction of the mounting steps 220 is perpendicular to the limiting direction, and its length is consistent with the length of the corresponding part of the lower end of the upper seat plate 200 in the direction perpendicular to the limiting direction. Figure 5 As shown. At the same time, the block-replaceable friction pendulum support also includes a connecting block 400 and a limit block 500. The shape of the connecting block 400 is adapted to the installation step 220, and the connecting block 400 is connected to the upper seat plate 200 as a whole through a number of fastening bolts 600 evenly distributed in the limit direction, and the lower surface of the connecting block 400 is flush with the lower end surface of the upper seat plate 200. The limit block 500 is located on the lower surface of the connecting block 400, arranged along the length direction of the connecting block 400, and the limit block 500 is connected to the connecting block 400 as a whole by a number of evenly distributed shear pins 700, as shown in the attached Figure 2 and attached Figure 4 As shown in . The installation position of the shear pin 700 does not intersect with the installation position of the fastening bolt 600 and does not interfere with each other. The upper end of the lower seat plate 300 is adjacent to the corresponding limit block 500 on both sides of the limit direction, forming a guide sliding pair, thereby realizing the horizontal bearing and guiding function of the support.

[0037] Under normal circumstances, the limit stopper 500 forms a limit with the lower seat plate 300 to realize the horizontal bearing of the support; in the case of an earthquake, when the earthquake force is greater than the designed shear force of the shear pin 700, the limit stopper 500 falls off and no longer limits the support. The support can slide in the horizontal direction. Through the coordinated movement of the upper spherical rotation pair and the lower spherical rotation pair, the period of the structure is extended, the earthquake energy input is reduced, and the friction energy is consumed through reciprocating swing to dissipate the earthquake energy. When the support is restored after the earthquake, the fastening bolt 600 is screwed out, the connecting block 400 and the limit stopper 500 are removed from the installation step 220, and the new connecting block 400, the limit stopper 500 and the shear pin 700 are connected into a whole and installed in the installation step 220, and the fastening bolt 600 is tightened to complete the replacement of the support block.

[0038] In this embodiment, a detachable connecting block is provided, and the limit stopper is connected to the upper seat plate via the connecting block. After a positive earthquake, the limit stopper can be quickly replaced, and the replacement is convenient and fast, and the construction cost is low.

[0039] In this embodiment, a slide groove 221 is provided on the top surface of the installation step 220 near the side wall of the step along its own length direction, and the length of the slide groove 221 is consistent with the length of the installation step 220. Figure 4 and the appendage 6. Thus, the mounting step 220 and the slide groove 221 form an "L"-shaped structure. The connecting block 400 is also an adaptable shape of the combined structure of the mounting step 220 and the slide groove 221, that is, the connecting block 400 has a protrusion that cooperates with the slide groove 221 and can be inserted into the slide groove 221. In this embodiment, the combined structure of the mounting step 220 and the slide groove 221 is conducive to improving the stress condition of the fastening bolt 600 and protecting the fastening bolt 600 from being damaged in an earthquake.

[0040] As attached Figure 2 As shown in the figure, in this embodiment, an upper spherical slide plate 110 is provided between the upper seat plate 200 and the spherical crown lining plate 100. The upper spherical slide plate 110 is connected as a whole with the spherical crown lining plate 100, and forms an upper spherical rotation pair with the upper seat plate 200. A lower spherical slide plate 320 is provided between the spherical crown lining plate 100 and the lower seat plate 300. The lower spherical slide plate 320 is connected as a whole with the lower seat plate 300, and forms a lower spherical rotation pair with the spherical crown lining plate 100. The upper spherical slide plate 110 and the lower spherical slide plate 320 in this embodiment are made of self-lubricating materials such as polytetrafluoroethylene to reduce the friction coefficient and meet the rotation and sliding requirements of the support.

[0041] In this embodiment, the edge of the first spherical crown surface 210 is provided with a stopper to prevent the beam from falling. Figure 4As shown in . When the support moves to the limit position, the anti-falling beam stop can prevent the support from falling due to excessive displacement. Furthermore, a buffer ring 230 is provided at the anti-falling beam stop to buffer the impact force when the support moves to the limit position, which is beneficial to protecting the bridge structure.

Claims

1. A friction pendulum support with replaceable stopper, characterized in that: include: A spherical crown lining plate, wherein the spherical crown lining plate is a hyperbolic structure; An upper seat plate, wherein the middle area of ​​the lower end surface of the upper seat plate has a first spherical crown surface that matches the upper curved surface of the spherical crown lining plate, and forms an upper spherical rotation pair with the spherical crown lining plate; rectangular installation steps are provided at the edges on both sides of the limiting direction of the lower end of the upper seat plate, and the length direction of the installation steps is perpendicular to the limiting direction; A connecting block, which is adapted to the mounting step and is connected to the upper seat plate as a whole by fastening bolts arranged in a limiting direction; A limit stopper, which is located on the lower surface of the connecting block and arranged along the length direction of the connecting block, and is connected to the connecting block as a whole by a shear pin; The lower seat plate has a second spherical crown surface in the middle area of ​​the upper end face of the lower seat plate, which cooperates with the lower curved surface of the spherical crown lining plate and forms a lower spherical rotation pair with the spherical crown lining plate; the two sides of the upper limit direction of the lower seat plate and the corresponding limit blocks form a guide sliding pair.

2. The stopper-replaceable friction pendulum support according to claim 1, characterized in that: A slide groove is provided on the top surface of the installation step along its length direction; and the shape of the connecting block is adapted to the combined structure of the installation step and the slide groove.

3. The stopper-replaceable friction pendulum support according to claim 2, characterized in that: The slide groove is adjacent to the step side wall of the installation step, and the two form an "L"-shaped structure.

4. The stopper-replaceable friction pendulum support according to claim 2 or 3, characterized in that: The length of the slide groove is consistent with the length of the installation step.

5. The stopper-replaceable friction pendulum support according to claim 1, characterized in that: An upper spherical surface slide plate is arranged between the upper seat plate and the spherical crown lining plate.

6. The stopper-replaceable friction pendulum support according to claim 1 or 5, characterized in that: A lower spherical surface slide plate is arranged between the spherical crown lining plate and the lower seat plate.

7. The stopper-replaceable friction pendulum support according to claim 1, characterized in that: The edge of the first spherical crown surface is provided with a beam-falling prevention stopper.

8. The stopper-replaceable friction pendulum support according to claim 7, characterized in that: A buffer ring is arranged at the stop opening of the anti-falling beam.

9. The stopper-replaceable friction pendulum support according to claim 1, characterized in that: The installation position of the shear pin does not intersect with the installation position of the fastening bolt.

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