Multidirectional sliding large displacement frictional damping device

Abstract

The utility model discloses large displacement friction damping device of multidirectional sliding, including first friction plate and second friction plate, second friction plate all sets up between two first friction plates, first friction plate all is cross -shaped, and the cross point position of cross -shaped is equipped with first friction piece, and four end portions all are first anchor nail connecting part for first anchor nail of wearing and setting, every second friction plate all is circular, and the position of the center of a circle coincides with the cross point position of all cross -shaped on a straight line, and the periphery annularly distributes second anchor nail connecting part for second anchor nail of wearing and setting, and every second anchor nail connecting part distance corresponding one side any first friction plate's two first anchor nail connecting part is equal, and the first anchor nail connecting part of a straight line arrangement is connected with same first anchor nail, and all second anchor nail connecting parts of a straight line arrangement all are connected with same second anchor nail. The utility model has the construction form of playing the damping effect in each direction of horizontal plane, can realize the effect of bridge in longitudinal and transverse isolation.

Description

Technical Field

[0001] This utility model relates to the field of bridge friction damping device manufacturing technology, and in particular to a large displacement friction damping device that can slide in multiple directions. Background Technology

[0002] Friction dampers for bridges are a common type of bridge component. Currently, the most commonly used type in engineering is the linear displacement type, which is similar to a viscous damper.

[0003] In practical applications, existing dampers are often too long and have poor overall performance, which negatively impacts the appearance of bridges.

[0004] Therefore, how to make the damper have omnidirectional damping effect, realize the longitudinal and transverse seismic isolation with a single device, have no interaction with the main beam under static conditions, adapt to static temperature displacement, have sufficient construction tolerance, and have a stop structure at the end of the seismic displacement to improve the anti-falling beam performance under the probability of exceeding the limit has become a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] In view of the above-mentioned defects of the prior art, the present invention provides a large displacement friction damping device that can slide in multiple directions. The purpose is to enable the damper to have omnidirectional damping effect, realize the control of longitudinal and transverse seismic isolation with a single device, have no interaction with the main beam under static conditions, can adapt to static temperature displacement, have sufficient construction tolerance, and have a stop structure at the end of the seismic displacement, which can improve the anti-falling beam performance under the probability of exceeding the limit.

[0006] To achieve the above objectives, this utility model discloses a large displacement friction damping device that can slide in multiple directions, including an odd number of first friction plates and an even number of second friction plates.

[0007] The second friction plate has at least two pieces;

[0008] The first friction plate has one more component than the second friction plate;

[0009] All the first friction plates and all the even-numbered second friction plates are arranged in parallel and spaced apart, and each second friction plate is arranged between two adjacent first friction plates;

[0010] Each of the first friction plates has a first friction pad on the side facing the adjacent second friction plate;

[0011] Each of the second friction plates has a second friction pad on the side facing the adjacent first friction plate;

[0012] Each of the first friction plates is cross-shaped, and the center of each of the first friction plates coincides with the intersection of the corresponding cross shape.

[0013] Each of the four ends of the first friction plate is a first anchor bolt connection part for inserting the first anchor bolt;

[0014] The four first anchor bolt connections of all the first friction plates are arranged along four mutually parallel straight lines.

[0015] Each of the second friction plates is circular, with its center position coinciding with the intersection of all the cross-shaped points on a straight line, and second anchor bolt connection portions for inserting the second anchor bolts are evenly distributed around its perimeter.

[0016] Each second anchor bolt connection is equidistant from the two first anchor bolt connections of any first friction plate on the corresponding side, and all four second anchor bolt connections of the second friction plates are arranged along four mutually parallel straight lines.

[0017] All the first anchor bolt connection parts arranged along the same straight line are connected to the friction plate connection part of the same first anchor bolt;

[0018] All the second anchor bolt connections arranged along the same straight line are connected to the friction plate connection of the same second anchor bolt.

[0019] Preferably, the two outermost first friction plates are each provided with a main friction plate rib on the side facing away from the corresponding second friction plate;

[0020] Each of the friction plates has a main rib that is a cross-shaped reinforcing rib that extends along the cross shape and is located on the side of the corresponding first friction plate facing away from the corresponding second friction plate.

[0021] Each pair of reinforcing ribs has short ribs at its ends forming a closed frame structure.

[0022] Preferably, the friction plate connection portion of each of the first anchor bolts and each of the second anchor bolts includes:

[0023] Anchor bolt body,

[0024] Nuts are located on the outer sides of the two outermost first friction plates, or on the outer sides of the two outermost second friction plates.

[0025] And a sleeve disposed between every two adjacent first friction plates, or between every two adjacent second friction plates.

[0026] Preferably, each of the first anchor bolts is connected to the pier and includes a pier pre-embedded rod embedded in the pier.

[0027] The friction plate connection of each of the first anchor bolts is connected to the corresponding pier embedded rod via a connecting cylinder.

[0028] More preferably, the pier pre-embedded rod is installed in the reserved hole of the pier and is fixed to the pier as a whole by grouting material.

[0029] More preferably, the friction plate connection of each of the first anchor bolts has a flared end at the end where it connects to the corresponding connecting cylinder;

[0030] Each of the connecting cylinders has a constricted hole at one end where it connects to the friction plate connection of the corresponding first anchor bolt. The constricted hole has a diameter smaller than the corresponding flared opening but larger than the corresponding friction plate connection.

[0031] Preferably, each of the second anchor bolts is connected to the main beam, including an anchor bolt anchored to the main beam;

[0032] The anchor bolt is connected to the friction plate connection part of the second anchor bolt as a nut.

[0033] More preferably, the main beam is provided with an anchor plate, which is fixed to the anchor rod.

[0034] The anchor rod of the second anchor bolt is integrated with the anchor plate of the main beam.

[0035] Preferably, it also includes an outer casing made of thin steel sheet.

[0036] Preferably, each first friction piece is fixed to the corresponding first friction plate, and each second friction piece is fixed to the corresponding second friction plate by adhesive bonding.

[0037] Each of the second friction plates is circular, and its diameter is not less than the sum of the diameter of the corresponding first friction plate and twice the design stroke of the friction damping device.

[0038] The beneficial effects of this utility model are:

[0039] This invention designs the friction damper as an integral damper with a box-like appearance. After installation, it visually blends into the bridge pier, resulting in a better appearance on urban overpasses.

[0040] The main working surface of this utility model remains horizontal, and it has a structural form that plays a damping role in all directions on the horizontal plane. A single damper device can achieve the effect of longitudinal and transverse seismic isolation of bridges.

[0041] In this invention, the second friction plate has a large diameter and area, resulting in a large sliding stroke of the entire damper, stable output friction force, and high reliability.

[0042] In this invention, the bolt at the end of the seismic displacement acts as a stop structure, which can prevent the main beam from continuing to slide at the end of the designed displacement, and can continue to provide better protection for the main beam after an earthquake with an excessive probability.

[0043] In this invention, the diameter of the friction plate connection of the first anchor bolt is smaller than the diameter of the top opening of the corresponding connecting cylinder, and this horizontal gap is used to release the horizontal displacement caused by temperature deformation.

[0044] The damper of this invention is only used for seismic energy dissipation. It does not interact with the main beam under static conditions and has sufficient construction tolerance.

[0045] This invention uses nuts to adjust the overall spatial orientation of the friction plate, ensuring sufficient construction tolerance.

[0046] The top of the connecting cylinder of this utility model is tapered, and the friction plate connecting part of the corresponding first anchor bolt is flared, which can form a structure that can withstand tensile force and provide force guarantee for the friction damper.

[0047] This utility model has four support points between the bridge pier and the main beam, which distributes the force evenly and significantly reduces the load-bearing capacity requirement of the anchor points compared to the two-point support method.

[0048] The following will further explain the concept, specific structure and technical effects of this utility model in conjunction with the accompanying drawings, so as to fully understand the purpose, features and effects of this utility model. Attached Figure Description

[0049] Figure 1 A schematic diagram of a planar structure according to an embodiment of the present invention is shown.

[0050] Figure 2 This diagram shows a longitudinal cross-sectional view of one embodiment of the present invention.

[0051] Figure 3 This diagram shows a structural schematic of a first friction plate with main and short ribs in one embodiment of the present invention.

[0052] Figure 4 This diagram shows the structure of a first friction plate without main ribs and short ribs in one embodiment of the present invention.

[0053] Figure 5 The diagram shows a structural schematic of the second friction plate in one embodiment of the present invention.

[0054] Figure 6 This diagram shows a partially enlarged cross-sectional view of the connection between all the first friction plates and one first anchor bolt in one embodiment of the present invention.

[0055] Figure 7This diagram shows a partially enlarged cross-sectional view of the connection between all the second friction plates and one second anchor bolt in one embodiment of the present invention. Detailed Implementation

[0056] Example: Figures 1 to 7 As shown, a large displacement friction damping device that can slide in multiple directions includes an odd number of first friction plates 1 and an even number of second friction plates 2.

[0057] There are at least two second friction plates 2;

[0058] The first friction plate 1 has one more piece than the second friction plate 2;

[0059] All first friction plates 1 and all even-numbered second friction plates 2 are arranged in parallel and spaced apart, with each second friction plate 2 arranged between two adjacent first friction plates 1;

[0060] Each first friction plate 1 has a first friction piece 11 on the side facing the adjacent second friction plate 2;

[0061] Each second friction plate 2 is provided with a second friction piece 21 on the side facing the adjacent first friction plate 1;

[0062] Each first friction plate 1 is cross-shaped, and the center of the corresponding first friction piece 11 coincides with the intersection of the corresponding cross shape.

[0063] Each of the four ends of the first friction plate 1 is a first anchor bolt connection part for inserting the first anchor bolt 3;

[0064] The four first anchor bolt connections of all the first friction plates 1 are arranged along four mutually parallel straight lines.

[0065] Each second friction plate 2 is circular, with its center position coinciding with the intersection of all the cross-shaped points on a straight line, and second anchor bolt connection parts for inserting the second anchor bolt 4 are evenly distributed around its perimeter.

[0066] The distance between each second anchor bolt connection and the two first anchor bolt connections of any first friction plate 1 on the corresponding side is equal, and the four second anchor bolt connections of all second friction plates 2 are arranged along four mutually parallel straight lines.

[0067] All the first anchor bolt connection parts arranged along the same straight line are connected to the friction plate connection part 5 of the same first anchor bolt 3;

[0068] All the second anchor bolt connections arranged along the same straight line are connected to the friction plate connection 5 of the same second anchor bolt 4.

[0069] In some embodiments, the two outermost first friction plates 1 are each provided with friction plate main ribs 6 on the side facing away from the corresponding second friction plates 2;

[0070] Each friction plate main rib 6 is a cross-shaped reinforcing rib that extends in a cross shape and is located on the side of the corresponding first friction plate 1 facing away from the corresponding second friction plate 2.

[0071] Each pair of reinforcing ribs has short ribs at its ends forming a closed frame structure.

[0072] In some embodiments, the friction plate connection portion 5 of each first anchor bolt 3 and each second anchor bolt 4 includes:

[0073] Anchor bolt body,

[0074] Nuts 51 are located on the outer sides of the two outermost first friction plates 1, or on the outer sides of the two outermost second friction plates 2.

[0075] And a sleeve 52 disposed between every two adjacent first friction plates 1, or between every two adjacent second friction plates 2.

[0076] In some embodiments, each first anchor bolt 3 is connected to the pier 7 and includes a pier pre-embedded rod 31 embedded in the pier 7;

[0077] Each first anchor bolt 3 has a friction plate connection 5 connected to the corresponding pier embedded rod 31 via a connecting cylinder 32.

[0078] In some embodiments, the pier pre-embedded rod 31 is set in the reserved hole 71 of the pier 7 and is fixed to the pier 7 as a whole by grouting material 72.

[0079] In some embodiments, the friction plate connection portion 5 of each first anchor bolt 3 is connected to one end of the corresponding connecting cylinder 32 with a flared end;

[0080] Each connecting cylinder 32 has a constriction hole at one end that is connected to the friction plate connecting part 5 of the corresponding first anchor bolt 3. The constriction hole has a diameter reduced to less than the corresponding flared opening, but larger than the anchor body of the corresponding friction plate connecting part 5.

[0081] The pier embedded rod 31 is made of solid round steel and is anchored in the concrete of the pier 7. The upper end is provided with a flared opening and the side of the flared opening is provided with threads for connection with the connecting cylinder 32. The anchoring with the pier 7 is a conventional technology and will not be described in detail.

[0082] The connecting sleeve 32 is in the form of a cup sleeve with a hole at the top. Its lower end is provided with an internal thread, which is tightened to the upper end of the bridge pier pre-embedded rod 31.

[0083] The friction plate connecting part 5 of the first anchor bolt 3 enters from the lower opening of the connecting cylinder 32 and exits from the top opening. Its diameter is smaller than the diameter of the top opening of the connecting cylinder 32. The bottom is provided with an flared opening, and the diameter of the flared opening is larger than the diameter of the top opening of the connecting cylinder 32.

[0084] The nut 51 of the friction plate connecting part 5 of the first anchor bolt 3 is set on the bottom surface of the corresponding first friction plate 1 on the outside. It is used to adjust the spatial posture of the first friction plate 1, anchor all the first friction plates 1, and adjust the preload of the first friction plate 11 by the preload of the nut 51.

[0085] The sleeve 52 is used to cover the friction plate connection part 5 of the first anchor bolt 3 and is disposed between two adjacent first friction plates 1.

[0086] In some embodiments, each second anchor bolt 4 is connected to the main beam 8, including an anchor bolt 41 anchored to the main beam 8;

[0087] The anchor bolt 41 is connected to the friction plate connection part 5 of the second anchor bolt 4 as a nut 51.

[0088] In some embodiments, the main beam 8 is provided with an anchor plate 81, which is fixed to the anchor rod 41.

[0089] The anchor rod 41 of the second anchor bolt 4 is connected to the anchor plate 81 of the main beam 8 as one unit.

[0090] When the bridge uses a concrete main beam 8, the anchor rod 41 is pre-embedded in the concrete main beam 8, and the top surface of the anchor plate 81 is flush with the concrete surface.

[0091] When the bridge adopts a steel main beam 8, the anchor rod 41 is anchored to the bottom surface of the anchor plate 81, and the anchor plate 81 is welded to the surface of the steel main beam 8.

[0092] The lower end of the anchor bolt 41 is provided with an internal thread.

[0093] The sleeve 52 is used to cover the friction plate connection part 5 of the second anchor bolt 4 and is disposed between two adjacent second friction plates 2.

[0094] The friction plate connection part 5 of the second anchor bolt 4 passes through the sleeve 52 and the second anchor bolt connection part of the second friction plate 2, and is anchored to the lower end internal thread of the anchor rod 41 by tightening the thread.

[0095] The nut 51 of the friction plate connection part 5 of the second anchor bolt 4 is used to fasten the anchor bolt 41 to the second friction plate 2, and also to adjust the spatial posture of all the second friction plates 2.

[0096] An annular gasket can be installed between the bottom surface of the anchor rod 41 and the second friction plate 2 to fit the friction plate connecting part 5, so as to adjust the spatial posture of all the second friction plates 2.

[0097] In some embodiments, a housing 10 made of thin steel sheet is also included.

[0098] In some embodiments, each first friction piece 11 is fixed to the corresponding first friction plate 1, and each second friction piece 21 is fixed to the corresponding second friction plate 2 by adhesive bonding.

[0099] Each second friction plate 21 is circular, and its diameter is not less than the sum of the diameter of the corresponding first friction plate 11 and twice the design stroke of the friction damping device.

[0100] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A large-displacement friction damping device capable of multi-directional sliding; characterized in that, It includes an odd-numbered first friction plate (1) and an even-numbered second friction plate (2); The second friction plate (2) has at least two pieces; The first friction plate (1) has one more than the second friction plate (2); All the first friction plates (1) and all the even-numbered second friction plates (2) are arranged in parallel at intervals, and each second friction plate (2) is arranged between two adjacent first friction plates (1); Each of the first friction plates (1) is provided with a first friction piece (11) on the side facing the adjacent second friction plate (2). Each of the second friction plates (2) is provided with a second friction piece (21) on the side facing the adjacent first friction plate (1). Each of the first friction plates (1) is cross-shaped, and the center of the corresponding first friction piece (11) coincides with the intersection of the corresponding cross shape. Each of the four ends of the first friction plate (1) is a first anchor bolt connection part for inserting the first anchor bolt (3); The four first anchor bolt connections of all the first friction plates (1) are arranged along four mutually parallel straight lines. Each of the second friction plates (2) is circular, with the center of the circle coinciding with the intersection of all the crosses on a straight line, and the second anchor bolt connection parts for inserting the second anchor bolt (4) are evenly distributed around the perimeter. Each second anchor bolt connection is equidistant from the two first anchor bolt connections of any first friction plate (1) on the corresponding side, and all four second anchor bolt connections of the second friction plates (2) are arranged along four mutually parallel straight lines. All the first anchor bolt connection parts arranged along the same straight line are connected to the friction plate connection part (5) of the same first anchor bolt (3); All the second anchor bolt connections arranged along the same straight line are connected to the friction plate connection (5) of the same second anchor bolt (4).

2. The large-displacement friction damping device capable of multi-directional sliding according to claim 1, characterized in that, The two outermost first friction plates (1) each have a friction plate main rib (6) on the side facing away from the corresponding second friction plate (2). Each of the friction plate main ribs (6) is a cross-shaped reinforcing rib that extends along the cross shape and is located on the side of the corresponding first friction plate (1) facing away from the corresponding second friction plate (2). Each pair of reinforcing ribs has short ribs (9) at the ends to form a closed frame structure.

3. The large-displacement friction damping device capable of multi-directional sliding according to claim 1, characterized in that, The friction plate connection (5) of each of the first anchor bolts (3) and each of the second anchor bolts (4) includes: Anchor bolt body, Nuts (51) are set on the outside of the two outermost first friction plates (1) or on the outside of the two outermost second friction plates (2). And a sleeve (52) disposed between every two adjacent first friction plates (1) or between every two adjacent second friction plates (2).

4. The large-displacement friction damping device capable of multi-directional sliding according to claim 1, characterized in that, Each of the first anchor bolts (3) is connected to the pier (7) and includes a pier pre-embedded rod (31) embedded in the pier (7). The friction plate connection (5) of each of the first anchor bolts (3) is connected to the corresponding pier embedded rod (31) through the connecting cylinder (32).

5. The large-displacement friction damping device capable of multi-directional sliding according to claim 4, characterized in that, The pier pre-embedded rod (31) is set in the reserved hole (71) of the pier (7) and is fixed to the pier (7) as a whole by grouting material (72).

6. The large-displacement friction damping device with multi-directional sliding capability according to claim 4, characterized in that, Each of the first anchor bolts (3) has a flared end at one end of the friction plate connecting part (5) that connects to the corresponding connecting cylinder (32); Each of the connecting cylinders (32) has a constriction hole at one end that is connected to the friction plate connecting part (5) of the corresponding first anchor bolt (3), with the hole diameter reduced to be smaller than the corresponding flared opening, but larger than the anchor body of the corresponding friction plate connecting part (5).

7. The large-displacement friction damping device capable of multi-directional sliding according to claim 1, characterized in that, Each of the second anchor bolts (4) is connected to the main beam (8), including an anchor bolt (41) anchored to the main beam (8). The anchor rod (41) is connected to the friction plate connection part (5) of the second anchor bolt (4) as a nut (51).

8. The large-displacement friction damping device capable of multi-directional sliding according to claim 7, characterized in that, The main beam (8) is provided with an anchor plate (81), which is fixed to the anchor rod (41); The anchor rod (41) of the second anchor bolt (4) is connected to the anchor plate (81) of the main beam (8).

9. The large-displacement friction damping device capable of multi-directional sliding according to claim 1, characterized in that, It also includes an outer shell (10) made of thin steel sheet.

10. The large-displacement friction damping device capable of multi-directional sliding according to claim 1, characterized in that, Each of the first friction pieces (11) and the corresponding first friction plate (1), and each of the second friction pieces (21) and the corresponding second friction plate (2) are fixed together by adhesive bonding; Each of the second friction plates (21) is circular, and its diameter is not less than the sum of the diameter of the corresponding first friction plate (11) and twice the design stroke of the friction damping device.

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