A type of bridge bearing block

Abstract

This utility model belongs to the field of bridge seismic reinforcement technology, and particularly relates to a bridge bearing block. It connects a first connecting mechanism to the main beam, a second connecting mechanism to the pier, and an upper friction mechanism to a lower friction mechanism. During vibration, the main beam and pier experience relative displacement, and the upper and lower friction mechanisms move relative to each other, dissipating energy through friction. When the vibration is large, the limiting mechanism prevents the upper and lower friction mechanisms from separating, thus limiting the relative displacement between the main beam and the pier. This utility model uses a bearing block for seismic reinforcement of existing bridges without replacing bridge bearings, without disrupting traffic, and at a lower cost. Compared to adding viscous dampers, this utility model has lower maintenance costs and provides multi-directional seismic isolation and limiting functions.

Description

Technical Field

[0001] This utility model belongs to the field of bridge seismic reinforcement technology, and in particular relates to a pressure-bearing block for bridges. Background Technology

[0002] With the acceleration of urbanization and the growth of transportation demand, bridge seismic strengthening technology has become a key to improving urban resilience. Existing technologies mostly adopt seismic strengthening solutions by replacing friction pendulum bearings, but this requires traffic interruption and is costly; if viscous dampers are installed, there are drawbacks such as unidirectional limitation and high maintenance costs.

[0003] The aforementioned technologies have functional limitations: the friction pendulum bearing scheme requires traffic closure for construction, resulting in low socio-economic benefits; the viscous damper scheme can only constrain displacement in one direction and requires long-term maintenance. Neither of these schemes can simultaneously meet the requirements of traffic continuity and multi-dimensional seismic performance.

[0004] Therefore, a pressure-bearing stop block for bridges is proposed. Utility Model Content

[0005] The purpose of this invention is to provide a pressure-bearing stop for bridges to solve the above-mentioned problems.

[0006] To achieve the above objectives, this utility model provides the following solution:

[0007] A pressure-bearing block for a bridge includes: a first connecting mechanism connected to a main beam; an upper friction mechanism disposed below the first connecting mechanism; a lower friction mechanism disposed below the upper friction mechanism; the lower friction mechanism being adapted to the upper friction mechanism and in frictional contact with the upper friction mechanism; a limit mechanism disposed between the lower friction mechanism and the upper friction mechanism; and a second connecting mechanism disposed below the lower friction mechanism and connected to a bridge pier.

[0008] The lower friction mechanism includes a friction block, the cross-sectional shape of which is rectangular or elliptical, the height of which gradually decreases from the center to the outer edge, and a friction surface is provided on the friction block.

[0009] In the pressure-bearing block of this utility model, when the cross-sectional shape of the friction block is rectangular, the friction block is set as a frustum, and the sidewall of the frustum is the friction surface.

[0010] In the pressure-bearing block of this utility model, when the cross-sectional shape of the friction block is elliptical, the friction block is set as a frustum of an ellipse, and the sidewall of the frustum of an ellipse is the friction surface. The longitudinal section of the friction surface is arc-shaped and concave.

[0011] In the pressure-bearing block of this utility model, the upper friction mechanism includes a steel sleeve, which is adapted to the friction block. The bottom surface of the steel sleeve is provided with a mounting groove in the circumferential direction. A friction ring is fixedly connected in the circumferential direction in the mounting groove. The friction ring extends out of the mounting groove and makes frictional contact with the friction surface.

[0012] In the pressure-bearing block of this utility model, the limiting mechanism includes a limiting rod, which is vertically arranged and fixed to the middle of the top surface of the friction block. The limiting rod is located inside the steel sleeve.

[0013] In the pressure-bearing block of this utility model, the first connecting mechanism includes a first connecting plate, the steel sleeve is fixedly connected to the bottom surface of the first connecting plate, and a first through hole is provided at each of the four corners of the first connecting plate. The first connecting plate is connected to the main beam through multiple first through holes.

[0014] In the pressure-bearing block of this utility model, the second connecting mechanism includes a second connecting plate, the friction block is fixedly connected to the top surface of the second connecting plate, and a second through hole is provided at each of the four corners of the second connecting plate. The second connecting plate is connected to the bridge pier through the second through hole.

[0015] In the pressure-bearing block of this utility model, a clamp bracket is circumferentially fixed to the outer side wall of the pier, and the second connecting plate is connected to the clamp bracket through the second through hole.

[0016] Compared with the prior art, the present invention has the following advantages and technical effects:

[0017] The first connecting mechanism is connected to the main beam, the second connecting mechanism is connected to the pier, and the upper friction mechanism is connected to the lower friction mechanism. When vibration occurs, the main beam and the pier will have relative displacement, and the upper friction mechanism and the lower friction mechanism will move relative to each other, dissipating energy through friction. When the vibration is large, the setting of the limiting mechanism can prevent the upper friction mechanism and the lower friction mechanism from separating, thereby limiting the relative displacement between the main beam and the pier.

[0018] This utility model uses pressure-bearing blocks to reinforce existing bridges against seismic forces. It does not require replacing bridge bearings, does not interrupt traffic, and is relatively inexpensive. Compared with adding viscous dampers, this utility model has lower maintenance costs and provides multi-directional seismic isolation and limiting functions. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the installation of the pressure-bearing stop block of this utility model;

[0021] Figure 2 This is a front view of the upper friction mechanism in Example 1;

[0022] Figure 3 This is a bottom view of the upper friction mechanism in Example 1;

[0023] Figure 4 This is a front view of the lower friction mechanism in Example 1;

[0024] Figure 5 This is a top view of the lower friction mechanism in Example 1;

[0025] Figure 6 This is a front view of the upper friction mechanism in Example 2;

[0026] Figure 7 This is a bottom view of the upper friction mechanism in Example 2;

[0027] Figure 8 This is a front view of the lower friction mechanism in Example 2;

[0028] Figure 9 This is a top view of the lower friction mechanism in Example 2;

[0029] Among them, 1. Main beam; 2. Support; 3. Pressure-bearing block; 4. Pier; 5. Bracket; 301. First connecting plate; 302. Steel sleeve; 303. Mounting groove; 304. First through hole; 305. Friction ring; 306. Second connecting plate; 307. Friction block; 308. Second through hole; 309. Limiting rod; 310. Friction surface. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] Example 1

[0033] Reference Figures 1 to 5 This embodiment discloses a pressure-bearing block for a bridge, comprising: a first connecting mechanism connected to the main beam 1; an upper friction mechanism disposed below the first connecting mechanism; a lower friction mechanism disposed below the upper friction mechanism; the lower friction mechanism is adapted to the upper friction mechanism; the lower friction mechanism and the upper friction mechanism are in frictional contact; a limit mechanism is disposed between the lower friction mechanism and the upper friction mechanism; and a second connecting mechanism disposed below the lower friction mechanism, which is connected to the bridge pier 4.

[0034] The lower friction mechanism includes a friction block 307, which is configured as a frustum. The sidewall of the frustum is a friction surface 310. The cross-sectional shape of the friction block 307 is rectangular. The height of the friction block 307 gradually decreases from the center to the outer edge. The friction surface 310 is provided on the friction block 307.

[0035] A support 2 is installed above pier 4, and the main beam 1 is located above support 2;

[0036] The first connecting mechanism is connected to the main beam 1, the second connecting mechanism is connected to the pier 4, and the upper friction mechanism is connected to the lower friction mechanism. When vibration occurs, the main beam 1 and the pier 4 will have relative displacement, and the upper friction mechanism and the lower friction mechanism will move relative to each other, dissipating energy through friction. When the vibration is large, the setting of the limiting mechanism can prevent the upper friction mechanism and the lower friction mechanism from separating, thereby limiting the relative displacement of the main beam 1 and the pier 4. This utility model uses pressure-bearing blocks to carry out seismic reinforcement and renovation of existing bridges, without replacing bridge bearings, without interrupting traffic, and with low cost. Compared with adding viscous dampers, this utility model has low maintenance cost and provides multi-directional seismic isolation and limiting functions.

[0037] In some feasible solutions, the upper friction mechanism includes a steel sleeve 302, which is adapted to the friction block 307. The bottom surface of the steel sleeve 302 is provided with a mounting groove 303, and a friction ring 305 is fixedly connected to the mounting groove 303. The friction ring 305 extends out of the mounting groove 303 and makes frictional contact with the friction surface 310.

[0038] In some feasible solutions, the limiting mechanism includes a limiting rod 309, which is vertically set and fixed to the middle of the top surface of the friction block 307. The limiting rod 309 is located inside the steel sleeve 302.

[0039] In some feasible solutions, the first connecting mechanism includes a first connecting plate 301, a steel sleeve 302 fixed to the bottom surface of the first connecting plate 301, and a first through hole 304 opened at each of the four corners of the first connecting plate 301. The first connecting plate 301 is connected to the main beam 1 through multiple first through holes 304.

[0040] In some feasible solutions, the second connecting mechanism includes a second connecting plate 306, a friction block 307 fixed to the top surface of the second connecting plate 306, and a second through hole 308 at each of the four corners of the second connecting plate 306. The second connecting plate 306 is connected to the pier 4 through the second through hole 308.

[0041] In some feasible solutions, a retaining bracket 5 is circumferentially fixed to the outer wall of the pier 4, and the second connecting plate 306 is connected to the retaining bracket 5 through the second through hole 308.

[0042] Work process:

[0043] Drill holes at predetermined positions on the bottom surface of the main beam 1, insert expansion bolts into the holes, and insert the bottom end of the expansion bolts into the first through hole 304 and fix them with nuts, thereby installing the first connecting plate 301 below the main beam 1. Fix the clamp bracket 5 to the outside of the pier 4, drill holes at predetermined positions on the top surface of the clamp bracket 5, insert expansion bolts into the holes, insert the top end of the expansion bolts into the second through hole 308 and fix them with nuts, thereby fixing the second connecting plate 306 to the clamp bracket 5. Alternatively, bolts can be pre-embedded in the clamp bracket 5, with the top end of the bolts inserting into the second through hole 308 and fixing them with nuts, thereby fixing the second connecting plate 306 to the clamp bracket 5. At this time, the friction surface 310 of the friction block 307 is in frictional contact with the friction ring 305 installed on the steel sleeve 302.

[0044] When no earthquake occurs, the main beam 1 is mainly supported by the support 2. When an earthquake occurs, the main beam 1 and the pier 4 undergo horizontal relative displacement, causing the friction ring 305 to slide along the friction surface 310, thereby achieving friction energy dissipation and vibration reduction. As the seismic force increases, one end of the friction ring 305 gradually approaches the limiting rod 309. Since the height of the edge of the friction surface 310 increases linearly from the height of the upward protrusion of the friction surface 310, the friction surface 310 gradually lifts the friction ring 305 upward during the sliding process, thereby freeing the support 2 and achieving seismic isolation.

[0045] Example 2

[0046] Reference Figure 1 , Figures 6 to 9 The difference from Embodiment 1 is that the friction block 307 is set as an elliptical frustum, the cross-sectional shape of the friction block 307 is elliptical, and the side wall of the elliptical frustum is the friction surface 310. The longitudinal section of the friction surface 310 is arc-shaped and concave.

[0047] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0048] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A bearing block for a bridge, characterized in that include: The first connecting mechanism is connected to the main beam (1). An upper friction mechanism is provided below the first connecting mechanism. A lower friction mechanism is provided below the upper friction mechanism. The lower friction mechanism is adapted to the upper friction mechanism. The lower friction mechanism is in frictional contact with the upper friction mechanism. A limit mechanism is provided between the lower friction mechanism and the upper friction mechanism. A second connecting mechanism is provided below the lower friction mechanism. The second connecting mechanism is connected to the pier (4). The lower friction mechanism includes a friction block (307), the cross-sectional shape of the friction block (307) is rectangular or elliptical, the height of the friction block (307) gradually decreases from the center to the outer edge, and a friction surface (310) is provided on the friction block (307).

2. A bearing block for a bridge according to claim 1, characterised in that: The friction block (307) has a rectangular cross-sectional shape and is configured as a frustum, with the sidewall of the frustum being the friction surface (310).

3. A bearing block for a bridge according to claim 1, characterized in that: The friction block (307) has an elliptical cross-section and is configured as a frustum of an ellipse. The sidewall of the frustum is the friction surface (310), and the longitudinal section of the friction surface (310) is arc-shaped and concave.

4. A bearing block for a bridge according to claim 1, characterized in that: The upper friction mechanism includes a steel sleeve (302) that is adapted to the friction block (307). The bottom surface of the steel sleeve (302) is provided with a mounting groove (303) in the circumferential direction. A friction ring (305) is fixedly connected in the circumferential direction in the mounting groove (303). The friction ring (305) extends out of the mounting groove (303) and makes frictional contact with the friction surface (310).

5. A bearing block for a bridge according to claim 4, wherein: The limiting mechanism includes a limiting rod (309), which is vertically arranged and fixed to the middle of the top surface of the friction block (307). The limiting rod (309) is located inside the steel sleeve (302).

6. A bearing block for a bridge according to claim 4, wherein: The first connecting mechanism includes a first connecting plate (301), and the steel sleeve (302) is fixedly connected to the bottom surface of the first connecting plate (301). The first connecting plate (301) has first through holes (304) at each of its four corners. The first connecting plate (301) is connected to the main beam (1) through multiple first through holes (304).

7. A bearing block for a bridge according to claim 1, characterized in that: The second connecting mechanism includes a second connecting plate (306), the friction block (307) is fixedly connected to the top surface of the second connecting plate (306), and a second through hole (308) is provided at each of the four corners of the second connecting plate (306). The second connecting plate (306) is connected to the bridge pier (4) through the second through hole (308).

8. A bearing block for a bridge according to claim 7, characterised in that: The outer side wall of the pier (4) is circumferentially fixed with a clamp bracket (5), and the second connecting plate (306) is connected to the clamp bracket (5) through the second through hole (308).

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