Pressure-bearing type collision-free check block

Abstract

The invention discloses a pressure-bearing type collision-free check block, which belongs to the technical field of bridge seismic strengthening, and comprises an upper connecting piece used for being connected with a main beam, a groove is formed in the bottom of the upper connecting piece, a friction piece is arranged at the bottom of the upper connecting piece, and the friction piece is arranged around the groove; the lower connecting plate is used for being connected with a bridge pier, a sliding face is arranged at the top of the lower connecting plate, the groove is right opposite to the sliding face, the friction piece is in friction contact with the sliding face, an upward protruding point is arranged in the center of the sliding face, and the height from the upward protruding point to the edge of the sliding face can be decreased linearly or nonlinearly; the limiting tenon is located in the center of the groove and fixedly connected to an upward protruding point on the top of the sliding face; wherein a support is arranged between a main beam and a pier of the bridge, and the top of the support is in contact with the bottom of the main beam. The shock absorption and isolation capacity of the bridge structure can be improved, the limiting effect is achieved, the construction process is simple, construction can be conducted on the premise that the existing bridge structure is not affected, and bridge passing is not affected.

Description

Technical Field

[0001] The invention relates to the technical field of bridge earthquake-resistant reinforcement, and in particular to a pressure-bearing non-collision stopper. Background Art

[0002] With the update of seismic design specifications, the seismic performance requirements of bridges have been significantly improved. The current bridge reinforcement and seismic technology is mainly divided into two categories: traditional structural reinforcement method and new energy dissipation device method.

[0003] (1) Traditional structural reinforcement method

[0004] Increasing the size of bridge piers and strengthening pile foundations: Improving seismic performance by increasing the cross-section of bridge piers or enhancing the bearing capacity of pile foundations requires a large amount of concrete and steel bars, and the construction period is long and costly.

[0005] (2) New energy-consuming device method

[0006] Support replacement (such as friction pendulum support): By lifting the bridge, the fixed support is replaced with a friction pendulum support, and its sliding is used to extend the structural cycle and consume energy. However, the lifting operation requires complex equipment and high-precision control, and has low applicability to high-pier bridges.

[0007] VFD viscous damper: uses viscous material as a medium to absorb earthquake energy. Although it does not change the structural stiffness, it can only provide one-way protection (such as horizontal direction) and requires regular maintenance, which has high maintenance costs. In addition, its connection nodes need to be precisely controlled, making installation difficult.

[0008] Therefore, a pressure-bearing non-collision stopper is proposed. Summary of the invention

[0009] The object of the present invention is to provide a pressure-bearing non-collision stopper, aiming to solve or improve at least one of the above-mentioned technical problems.

[0010] To achieve the above object, the present invention provides the following solution: The present invention provides a pressure-bearing non-collision stopper, comprising:

[0011] An upper connecting member, used for connecting with the main beam, a groove is provided at the bottom of the upper connecting member, a friction member is provided at the bottom of the upper connecting member, and the friction member is arranged around the groove;

[0012] A lower connecting plate is used to connect with the bridge pier, the top of the lower connecting plate has a sliding surface, the groove is arranged opposite to the sliding surface, the friction member is in frictional contact with the sliding surface, the center of the sliding surface has an upward protrusion point, and the height of the upward protrusion point on the sliding surface can decrease linearly or nonlinearly to the height at the edge of the sliding surface;

[0013] A limiting tenon, located at the center of the groove and fixedly connected to the upward protruding point on the top of the sliding surface;

[0014] Among them, a support is arranged between the main beam and the pier of the bridge, and the top of the support is in contact with the bottom of the main beam.

[0015] Preferably, the earthquake force is set to three levels from small to large, namely P1, P2, and P3;

[0016] When the earthquake force is at P1, the friction member is located above the lower end of the sliding surface, the friction member does not contact the sliding surface, and resists the earthquake force through the support effect;

[0017] When the earthquake force is at P2, the main beam and the pier are dislocated, and the friction member is in frictional contact with the sliding surface, resisting the earthquake force through friction energy consumption and support action;

[0018] When the earthquake force is at P3, the main beam and the pier are misaligned, the friction member is in frictional contact with the sliding surface, and one end of the friction member slides close to the limiting tenon, the top of the support is separated from the bottom of the main beam for seismic isolation, and the earthquake force is resisted by friction energy dissipation;

[0019] When the earthquake force is greater than P3, the main beam and the pier are misaligned, and the friction member slides to the limiting tenon, and the relative displacement between the main beam and the pier beam is limited by the limiting tenon.

[0020] Preferably, the upper connecting member includes an upper connecting plate and a pressure-bearing sleeve, the upper connecting plate is used to connect to the bottom of the main beam, the top of the pressure-bearing sleeve is fixedly connected to the bottom of the upper connecting plate, and the inner cavity of the pressure-bearing sleeve forms the groove.

[0021] Preferably, the friction member comprises a friction coefficient adjusting slider fixedly embedded around the bottom of the pressure-bearing sleeve, and the friction coefficient adjusting slider is in friction contact with the sliding surface.

[0022] Preferably, the inner cavity of the pressure-bearing sleeve is cylindrical.

[0023] Preferably, the sliding surface can be obtained by rotating an arbitrary curve, and the bottom of the friction coefficient adjustment slider is adapted to the shape of the sliding surface.

[0024] Preferably, the sliding surface is in the shape of a polygonal cone, and the bottom of the friction coefficient adjusting slider is adapted to the shape of the sliding surface.

[0025] Preferably, when installed on an existing bridge, a plurality of hoop brackets are respectively fixed on both sides of the bridge pier, the lower connecting plate is fixed to the hoop bracket, and the upper connecting plate is fixed to the bottom of the main beam;

[0026] Preferably, when installed on a newly built bridge, an installation space is reserved between the main beam and the pier, the lower connecting plate is fixedly connected to the pier, and the upper connecting plate is fixedly connected to the bottom of the main beam.

[0027] The present invention discloses the following technical effects: the upper connecting member and the lower connecting plate are connected to the main beam and the bridge pier respectively. When an earthquake occurs, the main beam and the bridge pier will have relative displacement, and the friction member will be in friction contact with the sliding surface to realize friction energy consumption, thereby improving the shock absorption effect of the earthquake; with the increase of the earthquake force, the horizontal relative displacement of the main beam and the bridge pier will intensify, and when the friction member slides along the sliding surface, the sliding surface will gradually lift the friction member upward, so that the main beam and the support are separated to realize seismic isolation, thereby protecting the support; and the sliding of the friction member is limited by the limiting tenon, thereby limiting the relative displacement of the main beam and the bridge pier. The present application can improve the seismic isolation capacity of the bridge structure and has a limiting effect. At the same time, the construction process of the present application is simple. The device can be installed at the bottom of the beam and the bridge pier without affecting the existing bridge structure, thereby not affecting the traffic on the bridge. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0029] Figure 1 It is a structural schematic diagram of the present invention when it is installed on a beam bridge;

[0030] Figure 2 It is a schematic diagram of the structure when the sliding surface in the present invention descends nonlinearly;

[0031] Figure 3 It is a schematic diagram of the structure when the sliding surface in the present invention descends linearly;

[0032] Figure 4 It is a schematic diagram of the hysteresis curve of the present invention.

[0033] In the figure: 1. main beam; 2. support; 3. multi-directional pressure stopper; 4. bridge pier; 5. bracket; 3-1. upper connecting plate; 3-2. pressure sleeve; 3-3. sliding surface; 3-4. limit tenon; 3-5. friction coefficient adjustment slider; 3-6. lower connecting plate. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0036] Reference Figure 1-Figure 4 The present invention provides a pressure-bearing non-collision stopper, comprising:

[0037] An upper connecting member, the upper connecting member is used to connect with the main beam 1, a groove is provided at the bottom of the upper connecting member, a friction member is provided at the bottom of the upper connecting member, and the friction member is arranged around the groove;

[0038] The lower connecting plate 3-6 is used to connect with the bridge pier 4. The top of the lower connecting plate 3-6 has a sliding surface 3-3. The groove is arranged opposite to the sliding surface 3-3. The friction member is in friction contact with the sliding surface 3-3. The center of the sliding surface 3-3 has an upward protrusion. The height of the upward protrusion on the sliding surface 3-3 can decrease linearly or nonlinearly to the height at the edge of the sliding surface 3-3.

[0039] A limiting tenon 3-4, which is located at the center of the groove and fixedly connected to the upward protruding point on the top of the sliding surface 3-3;

[0040] A support 2 is provided between the main beam 1 and the pier 4 of the bridge, and the top of the support 2 is in contact with the bottom of the main beam 1 .

[0041] When there is no earthquake, 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 member to slide along the sliding surface 3-3 to achieve friction energy dissipation and shock absorption. As the seismic force increases, one end of the friction member gradually approaches the limiting tenon 3-4. Since the height from the edge of the sliding surface 3-3 to the height of the upward protruding point of the sliding surface 3-3 increases linearly, the sliding surface 3-3 gradually lifts the friction member upward during the sliding process, dislodging the support 2 to achieve seismic isolation.

[0042] Multi-directional limiting is performed by limiting tenons 3-4.

[0043] In some optional embodiments, the earthquake force is set to three levels from small to large, namely P1, P2, and P3;

[0044] When the earthquake force is at P1, the main beam 1 and the pier 4 are slightly misaligned, and the friction member is located above the lower end of the sliding surface 3-3. At this time, the friction member is not in contact with the sliding surface 3-3, and the earthquake force is resisted through the support 2.

[0045] When the earthquake force is at P2, the misalignment between the main beam 1 and the pier 4 increases, and the friction member and the sliding surface 3-3 are in friction contact, and the friction energy dissipation and the support 2 simultaneously resist the earthquake force;

[0046] When the earthquake force is at P3, the misalignment between the main beam 1 and the pier 4 further increases, the friction member is in friction contact with the sliding surface 3-3, and one end of the friction member slides to a position close to the limiting tenon 3-4, and the top of the support 2 is separated from the bottom of the main beam 1 for seismic isolation, resisting the earthquake force through friction energy dissipation;

[0047] When the earthquake force is greater than P3, the misalignment between the main beam 1 and the pier 4 increases again, and the friction member slides to the limiting tenon 3-4, thereby limiting the relative displacement between the main beam 1 and the pier 4 through the limiting tenon 3-4.

[0048] In some optional embodiments, the upper connecting member includes an upper connecting plate 3-1 and a pressure-bearing sleeve 3-2. The upper connecting plate 3-1 is used to connect to the bottom of the main beam 1. The top of the pressure-bearing sleeve 3-2 is fixedly connected to the bottom of the upper connecting plate 3-1, and the inner cavity of the pressure-bearing sleeve 3-2 forms a groove.

[0049] In some optional embodiments, the friction member includes a friction coefficient adjusting slider 3-5 fixedly embedded around the bottom of the pressure-bearing sleeve 3-2, and the friction coefficient adjusting slider 3-5 is in friction contact with the sliding surface 3-3.

[0050] In some optional embodiments, the inner cavity of the pressure-bearing sleeve 3 - 2 is cylindrical.

[0051] In some optional embodiments, the sliding surface 3-3 can be obtained by rotating an arbitrary curve, such as a cone, and the bottom of the friction coefficient adjustment slider 3-5 is adapted to the shape of the sliding surface 3-3.

[0052] In some optional embodiments, the sliding surface 3-3 is a polygonal cone, and the bottom of the friction coefficient adjustment slider 3-5 is adapted to the shape of the sliding surface 3-3.

[0053] In some optional embodiments, when installed on an existing bridge, a plurality of hoop brackets 5 are respectively fixed on both sides of the pier 4, the lower connecting plate 3-6 is fixed to the hoop brackets 5, and the upper connecting plate 3-1 is fixed to the bottom of the main beam 1;

[0054] In some optional embodiments, when installed on a newly built bridge, an installation space is reserved between the main beam 1 and the pier 4, the lower connecting plate 3-6 is fixedly connected to the pier 4, and the upper connecting plate 3-1 is fixedly connected to the bottom of the main beam 1.

[0055] The upper connecting plate 3-1, the pressure-bearing sleeve 3-2, the sliding surface 3-3, the limiting tenon 3-4, the friction coefficient adjusting slider 3-5 and the lower connecting plate 3-6 constitute the multi-directional pressure-bearing stopper 3.

[0056] The multi-directional pressure-bearing stopper 3 is assembled as follows: the pressure-bearing sleeve 3-2 is connected to the upper connecting plate 3-1, and the friction coefficient adjusting slider 3-5 is embedded in the pressure-bearing sleeve 3-2 so that it can slide on the sliding surface 3-3. The main shock-absorbing and isolation mechanism of the multi-directional pressure-bearing stopper 3 is to achieve energy dissipation and shock absorption through the friction between the friction coefficient adjusting slider 3-5 and the sliding surface 3-3, to achieve shock isolation through the hollow bearing 2, and to perform multi-directional limiting through the limiting tenon 3-4.

[0057] Furthermore, a gap is left between the pressure-bearing sleeve 3 - 2 and the limiting tenon 3 - 4 to accommodate the temperature deformation of the main beam 1 .

[0058] This application has a four-level response under earthquake action, and the hysteresis curve of the device is as follows Figure 4 As shown:

[0059] Stage 1: When the earthquake force is less than P1 (0.2-0.6 times the yield force of the bridge pier 4), the friction coefficient adjustment slider 3-5 is not in contact with the sliding surface 3-3, and the bridge resists the earthquake load through the support 2;

[0060] Stage 2: When the earthquake force is at P2 (0.5-0.9 times the yield force of the bridge pier), the friction coefficient adjusting slider 3-5 contacts the sliding surface 3-3 and slides to dissipate friction energy. At this time, the lifting height of the multi-directional pressure-bearing block 3 has not yet caused the bearing 2 to be emptied. The bridge resists the earthquake load together with the multi-directional pressure-bearing block 3 and the bearing 2;

[0061] Stage 3: When the earthquake force is at P3 (0.8-1.0 times the yield force of the bridge pier), the lifting height of the multi-directional pressure-bearing block 3 makes the bearing 2 empty, and the bridge transmits the earthquake load through the friction between the friction coefficient adjustment slider 3-5 and the sliding surface 3-3 to achieve seismic isolation;

[0062] Stage 4: When the relative displacement of the pier and beam exceeds U3 (0.8-1.0 times the width of the expansion joint), the limiting tenon 3-4 will limit the sliding of the pressure sleeve 3-2, thus achieving a limiting effect;

[0063] In the hysteresis curve, U3 corresponds to P3.

[0064] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to 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.

[0065] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A pressure-bearing non-collision stopper, characterized in that: include: An upper connecting member, used for connecting to the main beam (1), wherein a groove is provided at the bottom of the upper connecting member, and a friction member is arranged at the bottom of the upper connecting member, and the friction member is arranged around the groove; A lower connecting plate (3-6) is used for connecting with the bridge pier (4); the top of the lower connecting plate (3-6) is provided with a sliding surface (3-3); the groove is arranged opposite to the sliding surface (3-3); the friction member is in frictional contact with the sliding surface (3-3); the center of the sliding surface (3-3) is provided with an upward protrusion; the height of the upward protrusion on the sliding surface (3-3) can decrease linearly or nonlinearly from the height at the edge of the sliding surface (3-3); A limiting tenon (3-4) is located at the center of the groove and fixedly connected to an upward protruding point on the top of the sliding surface (3-3); A support (2) is arranged between a main beam (1) and a pier (4) of the bridge, and the top of the support (2) is in contact with the bottom of the main beam (1).

2. The pressure-bearing non-collision stopper according to claim 1, characterized in that: The earthquake force is set to three levels from small to large, namely P1, P2, and P3; When the earthquake force is at P1, the friction member is located above the lower end of the sliding surface (3-3), the friction member is not in contact with the sliding surface (3-3), and the earthquake force is resisted through the support (2); When the earthquake force is at P2, the main beam (1) and the bridge pier (4) are dislocated, the friction member and the sliding surface (3-3) are in friction contact, and the friction energy dissipation and the support (2) simultaneously resist the earthquake force; When the earthquake force is at P3, the main beam (1) and the bridge pier (4) are misaligned, the friction member is in frictional contact with the sliding surface (3-3), and one end of the friction member slides to a position close to the limiting tenon (3-4), and the top of the support (2) is separated from the bottom of the main beam (1) for earthquake isolation, thereby resisting the earthquake force through friction energy dissipation; When the earthquake force is greater than P3, the main beam (1) and the pier (4) are misaligned, and the friction member slides to the limiting tenon (3-4), thereby limiting the relative displacement between the main beam (1) and the pier beam through the limiting tenon (3-4).

3. The pressure-bearing non-collision stopper according to claim 1, characterized in that: The upper connecting member comprises an upper connecting plate (3-1) and a pressure-bearing sleeve (3-2); the upper connecting plate (3-1) is used to be connected to the bottom of the main beam (1); the top of the pressure-bearing sleeve (3-2) is fixedly connected to the bottom of the upper connecting plate (3-1); and the inner cavity of the pressure-bearing sleeve (3-2) forms the groove.

4. The pressure-bearing non-collision stopper according to claim 3, characterized in that: The friction member comprises a friction coefficient adjusting slider (3-5) fixedly embedded around the bottom of the pressure-bearing sleeve (3-2), and the friction coefficient adjusting slider (3-5) is in friction contact with the sliding surface (3-3).

5. The pressure-bearing non-collision stopper according to claim 3, characterized in that: The inner cavity of the pressure-bearing sleeve (3-2) is cylindrical.

6. The pressure-bearing non-collision stopper according to claim 4, characterized in that: The sliding surface (3-3) can be obtained by rotating an arbitrary curve, and the bottom of the friction coefficient adjustment slider (3-5) is adapted to the shape of the sliding surface (3-3).

7. The pressure-bearing non-collision stopper according to claim 4, characterized in that: The sliding surface (3-3) is in the shape of a polygonal cone, and the bottom of the friction coefficient adjustment slider (3-5) is adapted to the shape of the sliding surface (3-3).

8. The pressure-bearing non-collision stopper according to claim 3, characterized in that: When installed on an existing bridge, a plurality of hoop brackets (5) are respectively fixed to both sides of the bridge pier (4), the lower connecting plate (3-6) is fixed to the hoop brackets (5), and the upper connecting plate (3-1) is fixed to the bottom of the main beam (1).

9. The pressure-bearing non-collision stopper according to claim 3, characterized in that: When installed on a newly built bridge, an installation space is reserved between the main beam (1) and the pier (4), the lower connecting plate (3-6) is fixedly connected to the pier (4), and the upper connecting plate (3-1) is fixedly connected to the bottom of the main beam (1).

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