CN111441241A - Bridge anti-seismic damper structure with rotational friction energy consumption - Google Patents
Bridge anti-seismic damper structure with rotational friction energy consumption Download PDFInfo
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- CN111441241A CN111441241A CN202010283721.3A CN202010283721A CN111441241A CN 111441241 A CN111441241 A CN 111441241A CN 202010283721 A CN202010283721 A CN 202010283721A CN 111441241 A CN111441241 A CN 111441241A
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- friction
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- limiting piece
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/04—Bearings; Hinges
- E01D19/042—Mechanical bearings
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
Abstract
The invention discloses a bridge anti-seismic damper structure with rotational friction energy consumption, which comprises a limiting piece, a friction rod, a friction ball, a cylinder, a piston rod of the cylinder and a fixed hinge support; the limiting piece is fixed above the side wall of the pier, and the friction rod is fixed inside the limiting piece and penetrates through the friction ball to be connected with the limiting piece; the bottom of the piston rod is connected with the friction ball, and a section of the top of the piston rod is positioned in the cylinder; the top end of the cylinder is hinged with the fixed hinge support; the fixed hinge support is fixed at the bottom of the beam body. The invention has reasonable design, and the friction ball and the friction rod are arranged, so that the rotational friction caused by the displacement of the beam body is fully utilized to consume the seismic energy; the cylinder and the piston rod are arranged, vibration energy of the bridge during earthquake is absorbed through damping generated by gas compression flow, and relatively large displacement of the beam body and the bridge pier is limited. The invention has simple structure, convenient construction and lower cost.
Description
Technical Field
The invention belongs to the technical field of bridge seismic resistance, and particularly relates to a bridge seismic resistance damper structure with rotational friction energy consumption.
Background
The bridge is one of national infrastructure, and plays a significant role in transportation and national economic development. In recent years, with the rapid development of social and economic technologies and the continuous acceleration of urbanization processes in China, the demand of bridges across rivers and cities is more and more, a plurality of bridge construction projects appear successively, and the number and investment of bridges are more and more. As an important transportation hub, the safety of a bridge is a prerequisite for the bridge to function. However, under the influence of an earthquake, the bridge may be seriously damaged or even collapsed, which not only causes huge economic loss, but also threatens the life safety of people and brings difficulty to rescue work after the earthquake. In an earthquake, the bridge is damaged in various modes, wherein overlarge relative displacement between a bridge upper part beam body and a bridge pier is one of main reasons for bridge damage, and the bridge upper part beam body can cause collision between adjacent beam bodies and beam falling damage due to the relative displacement.
At present, in order to limit relatively large displacement between a beam body and a bridge pier, a bridge in China is generally provided with a connecting device between the bridge pier and an upper beam body, and the main connecting mode is a guyed type and a chained type. The connecting devices mainly rely on damping generated by the devices to the beam body in the earthquake process to block the relative displacement of the beam body, so that the limiting effect is achieved, but the tensile rigidity is high, so that large earthquake force is transmitted, the devices are damaged excessively, excessive damping force is generated to the bridge, and accordingly the bridge is damaged excessively.
To the aforesaid not enough, need design and develop a neotype bridge antidetonation limit structure, can consume seismic energy, the great relative displacement of restriction roof beam body and pier, cushion the earthquake power simultaneously, do not cause too big effort to the roof beam body and pier.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a bridge anti-seismic damper structure with rotational friction energy consumption. Moreover, the damper is simple in structure, convenient and fast to construct and low in cost.
In order to achieve the aim, the invention discloses a bridge anti-seismic damper structure with rotational friction energy consumption, which comprises a limiting part, a friction rod, a friction ball, a cylinder, a piston rod of the cylinder and a fixed hinge support; the limiting piece is fixed above the side wall of the pier, the limiting piece is of a square structure with a groove at the top, connecting holes for the friction rods to penetrate through are formed in the front surface and the rear surface of the limiting piece, a spherical groove for placing the friction ball is formed in the bottom of the groove, the middle of the spherical groove is communicated with the connecting holes, the friction ball is fixed at the end of the piston rod, and a round hole for the friction rods to penetrate through is formed in the side wall of the friction ball; the top end of the cylinder is hinged with the fixed hinge support; the fixed hinge support is fixed at the bottom of the main beam.
The longitudinal section of the groove at the top of the limiting piece is U-shaped, and two sides of the groove are arc-shaped curved surfaces; the both sides of locating part inner wall are equipped with the fixed plate, it has a plurality of bolt holes to open on the fixed plate, the bolt hole cooperation anchor bolt is fixed the locating part on the pier lateral wall.
The inner surface of the spherical groove is a rough surface, and the spherical groove is matched with the friction ball and is in close contact with the friction ball; the friction rod both ends are equipped with the external screw thread with the nut assorted, through the nut will the friction rod card is inside the locating part.
The inner surface and the outer surface of the friction ball and the outer surface of the friction rod are rough surfaces; the friction bar is in close contact with the inner surface of the friction ball.
The fixed hinge support comprises a top plate and a rotating hinge, and the rotating hinge is fixed on the lower surface of the top plate; and the top plate is provided with a top plate bolt hole for fixing the fixed hinge support at the bottom of the beam body in a manner of matching with the top plate bolt.
The top of the piston rod is connected with a piston, and the piston seals the gas in the cylinder; the top of the piston rod is separated from the bottom of the cylinder by a certain distance.
The cylinder top is equipped with semi-cylindrical round pin head, be equipped with the through-hole that is used for the rotation hinge to pass on the round pin head, the round pin head at cylinder top is articulated with fixed hinge support through rotating the hinge.
The invention has the beneficial effects that:
1) the invention can effectively absorb and consume earthquake energy. On one hand, the friction ball is connected with the piston rod and can rotate along with the piston rod during earthquake, and the inner surface and the outer surface of the friction ball can generate friction force during rotation, so that earthquake energy is greatly consumed; on the other hand, in the process that the cylinder vibrates and displaces along with the upper beam body during earthquake, the gas in the cylinder is compressed, and the gas generates damping to absorb vibration energy when flowing in a compression mode, so that earthquake force is buffered.
2) The invention can effectively limit the relatively large horizontal displacement between the beam body and the pier. When the gas compression in the cylinder reaches the limit, a larger pressure effect is generated to resist the displacement of the beam body, and the continuous rotation of the piston rod is inhibited due to the limiting effect of the friction rod in the limiting piece at the pier, so that the further horizontal displacement of the upper beam body is prevented.
3) The invention can realize multi-directional limiting. The design of the arc-shaped curved surfaces on two sides of the U-shaped longitudinal section of the groove at the top of the limiting part provides a rotating space for the piston rod along the bridge direction and the transverse bridge direction, so that the relative displacement of the beam body can be limited in multiple directions.
4) The invention has simple structure, convenient construction, lower cost and convenient repair.
Drawings
FIG. 1 is a schematic diagram of the structural arrangement of the present invention;
FIG. 2 is a schematic view of a position limiting member according to the present invention;
FIG. 3 is a schematic view of the friction bar structure of the present invention;
FIG. 4 is a schematic view of the damper body structure of the present invention;
in the figure: the device comprises a limiting part 1, a fixing plate 2, a friction rod 3, an anchor bolt 4, a connecting hole 5, a friction ball 6, a piston rod 7, a piston 71, an air cylinder 8, a fixed hinged support 9, a rotating hinge 10, a top plate 11, a top plate bolt 12, a spherical groove 13, a bolt hole 14, a nut 15, a pin head 16, a through hole 17, a circular hole 18, a girder 19, an expansion joint 20, a bridge support 21, a pier 22 and a groove 23.
Detailed Description
The invention is further illustrated below:
referring to figures 1-4 of the drawings,
the invention discloses a bridge anti-seismic damper structure with rotational friction energy consumption, which comprises a limiting piece 1, a friction rod 3, a friction ball 6, a cylinder 8, a piston rod 7 of the cylinder 8 and a fixed hinge support 9, wherein the limiting piece is fixedly connected with the friction rod;
the limiting piece 1 is fixed above the side wall of a pier 22, the limiting piece 1 is of a square structure with a groove 23 at the top, connecting holes 5 for the friction rod 3 to pass through are formed in the front surface and the rear surface of the limiting piece 1, a spherical groove 13 for placing the friction ball 6 is formed in the bottom of the groove 23, the bottom of the spherical groove 13 is communicated with the connecting holes 5, the friction ball 6 is fixed at the end of the piston rod 7, and a round hole 18 for the friction rod 3 to pass through is formed in the side wall of the friction ball;
the top end of the cylinder 8 is hinged with the fixed hinge support 9; the fixed hinge support 9 is fixed at the bottom of the main beam 19.
The longitudinal section of the groove 23 at the top of the limiting piece 1 is U-shaped, and two sides of the groove are arc-shaped curved surfaces; the both sides of 1 inner wall of locating part are equipped with fixed plate 2, it has a plurality of bolt holes 14 to open on the fixed plate 2, bolt hole 14 cooperation anchor bolt 4 fixes locating part 1 on pier 22 lateral wall, can restrict the maximum angle that piston rod 7 rotated through setting up recess 23, when piston rod 7 rotated maximum angle, can produce great pulling force effect to pier 22.
The inner surface of the spherical groove 13 is rough, and the spherical groove 13 is matched with the friction ball 6 and is tightly contacted with the friction ball; the friction rod 3 is provided with external threads matched with the screw cap 15 at two ends, and the friction rod 3 is clamped inside the limiting piece 1 through the screw cap 15; the inner surface and the outer surface of the friction ball 6 and the outer surface of the friction rod 3 are rough surfaces, and the friction rod 3 is in close contact with the inner surface of the friction ball 6; during earthquake, the piston rod 7 rotates along with the movement of the cylinder 8, so that the friction ball 6 is driven to rotate relative to the surfaces of the friction rod 6 and the spherical groove 13 to generate the action of friction force; before an earthquake, a pretension is provided between the piston rod 7 and the friction ball 6, so that the friction ball 6 can respond quickly to generate a friction force when the piston rod 7 rotates.
The fixed hinge support 9 comprises a top plate 11 and a rotating hinge 10, and the rotating hinge 10 is fixed on the lower surface of the top plate 11; and the top plate 11 is provided with a top plate bolt hole for fixing the fixed hinge support 9 at the bottom of the beam body 19 by matching with the top plate bolt 12.
The top of the piston rod 7 is connected with a piston 71, and the piston 71 forms a seal for the gas in the cylinder 8; the top of the piston rod 7 is at a certain distance from the bottom of the cylinder 8.
The top of the cylinder 8 is provided with a semi-cylindrical pin head 16, the pin head 16 is provided with a through hole 17 for the rotating hinge 10 to pass through, and the pin head 16 at the top of the cylinder 8 is hinged with the fixed hinge support 9 through the rotating hinge 10.
The working principle is as follows: 1. normally, the piston rod 7 exerts a pretensioning force on the friction ball 6, and the friction ball 6 exerts pressure on the surface of the friction rod 3 and the surface of the spherical groove 13, so that the friction ball 6 can quickly respond to generate friction force when the piston rod 7 rotates, and meanwhile, the gas in the cylinder 8 flows freely, and the generated damping is very small. 2. Under the action of a small earthquake, the main beam 19 and the pier 22 vibrate and generate relative displacement, when the cylinder 8 vibrates and displaces along with the main beam, the gas in the cylinder is compressed, the gas flow is accelerated and vibrates violently, and damping is generated to absorb vibration energy; in addition, the piston rod 7 also rotates along with the movement of the cylinder 8, so that the friction ball 6 is driven to rotate relative to the surfaces of the friction rod 6 and the spherical groove 13 to generate friction force, and most of seismic energy is consumed. 3. Under the action of a major earthquake, along with the continuous compression of the gas inside the cylinder 8, when the gas inside the cylinder 8 reaches the compression limit, great pressure is generated, the relative displacement of the girder 19 is hindered, and because the limiting effect of the friction rod 3 inside the limiting part 1 is realized, so that the piston rod 7 generates great tensile force on the pier 22, the further great displacement between the girder 19 and the pier 22 is hindered, the occurrence of the girder falling phenomenon is avoided, the bridge support 21 is protected, and the expansion joint 20 is also protected.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent modifications made by the present invention and the contents of the drawings or directly or indirectly applied to the related technical fields are included in the scope of the present invention.
Claims (7)
1. The utility model provides a bridge antidetonation attenuator structure with rotational friction power consumption which characterized in that: comprises a limiting piece (1), a friction rod (3), a friction ball (6), a cylinder (8), a piston rod (7) of the cylinder (8) and a fixed hinge support (9);
the limiting piece (1) is fixed above the side wall of a pier (22), the limiting piece (1) is of a square structure, the top of the limiting piece is provided with a groove (23), connecting holes (5) for the friction rod (3) to penetrate through are formed in the front surface and the rear surface of the limiting piece, a spherical groove (13) for placing the friction ball (6) is formed in the bottom of the groove (23), the middle of the spherical groove (13) is communicated with the connecting holes (5), the friction ball (6) is fixed at the end part of the piston rod (7), and a round hole (18) for the friction rod (3) to penetrate through is formed in the side wall of the friction ball;
the top end of the air cylinder (8) is hinged with the fixed hinge support (9); the fixed hinge support (9) is fixed at the bottom of the main beam (19).
2. The anti-seismic bridge damper structure with rotational friction energy dissipation function according to claim 1, wherein: the longitudinal section of a groove (23) at the top of the limiting piece (1) is U-shaped, and two sides of the groove are arc-shaped curved surfaces; the locating part fixing structure is characterized in that fixing plates (2) are arranged on two sides of the inner wall of the locating part (1), a plurality of bolt holes (14) are formed in the fixing plates (2), and the bolt holes (14) are matched with anchoring bolts (4) to fix the locating part (1) on the side wall of the pier (22).
3. The anti-seismic bridge damper structure with rotational friction energy dissipation function according to claim 2, wherein: the inner surface of the spherical groove (13) is a rough surface, and the spherical groove (13) is matched with the friction ball (6) and is tightly contacted with the friction ball; the friction rod (3) is provided with external threads matched with the screw cap (15) at two ends, and the friction rod (3) is clamped inside the limiting part (1) through the screw cap (15).
4. The anti-seismic bridge damper structure with rotational friction energy dissipation function according to claim 3, wherein: the inner surface and the outer surface of the friction ball (6) and the outer surface of the friction rod (3) are rough surfaces; the friction rod (3) is in close contact with the inner surface of the friction ball (6).
5. The anti-seismic bridge damper structure with rotational friction energy dissipation function according to claim 1, wherein: the top of the piston rod (7) is connected with a piston (71), and the piston (71) is used for sealing the gas in the cylinder (8); the top of the piston rod (7) is separated from the bottom of the air cylinder (8) by a certain distance.
6. The anti-seismic bridge damper structure with rotational friction energy dissipation function according to claim 1, wherein: the fixed hinge support (9) comprises a top plate (11) and a rotating hinge (10), and the rotating hinge (10) is fixed on the lower surface of the top plate (11); and the top plate (11) is provided with a top plate bolt hole for fixing the fixed hinge support (9) at the bottom of the beam body (19) in a way of being matched with the top plate bolt (12).
7. The anti-seismic bridge damper structure with rotational friction energy dissipation function according to claim 6, wherein: the top of the air cylinder (8) is provided with a semi-cylindrical pin head (16), the pin head (16) is provided with a through hole (17) for a rotating hinge (10) to pass through, and the pin head (16) at the top of the air cylinder (8) is hinged to the fixed hinge support (9) through the rotating hinge (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010283721.3A CN111441241A (en) | 2020-04-13 | 2020-04-13 | Bridge anti-seismic damper structure with rotational friction energy consumption |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010283721.3A CN111441241A (en) | 2020-04-13 | 2020-04-13 | Bridge anti-seismic damper structure with rotational friction energy consumption |
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| Publication Number | Publication Date |
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| CN111441241A true CN111441241A (en) | 2020-07-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010283721.3A Pending CN111441241A (en) | 2020-04-13 | 2020-04-13 | Bridge anti-seismic damper structure with rotational friction energy consumption |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111981082A (en) * | 2020-08-24 | 2020-11-24 | 湖南大学 | Damper vibration reduction system for inhibiting vertical vibration of bridge girder |
| CN112195754A (en) * | 2020-09-25 | 2021-01-08 | 陈松 | Anti-collision connecting device for bridge |
| CN112523070A (en) * | 2020-12-16 | 2021-03-19 | 重庆交通大学 | Public road bridge roof beam stop device that falls is prevented to bridge |
| CN113699873A (en) * | 2021-10-09 | 2021-11-26 | 四川省交通勘察设计研究院有限公司 | Bridge structure capable of crossing movable fracture |
| CN114411531A (en) * | 2022-01-26 | 2022-04-29 | 贵州路桥集团有限公司 | Anti-seismic device and anti-seismic structure for bridge |
-
2020
- 2020-04-13 CN CN202010283721.3A patent/CN111441241A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111981082A (en) * | 2020-08-24 | 2020-11-24 | 湖南大学 | Damper vibration reduction system for inhibiting vertical vibration of bridge girder |
| CN112195754A (en) * | 2020-09-25 | 2021-01-08 | 陈松 | Anti-collision connecting device for bridge |
| CN112523070A (en) * | 2020-12-16 | 2021-03-19 | 重庆交通大学 | Public road bridge roof beam stop device that falls is prevented to bridge |
| CN113699873A (en) * | 2021-10-09 | 2021-11-26 | 四川省交通勘察设计研究院有限公司 | Bridge structure capable of crossing movable fracture |
| CN113699873B (en) * | 2021-10-09 | 2023-02-03 | 四川省交通勘察设计研究院有限公司 | Bridge structure capable of crossing movable fracture |
| CN114411531A (en) * | 2022-01-26 | 2022-04-29 | 贵州路桥集团有限公司 | Anti-seismic device and anti-seismic structure for bridge |
| CN114411531B (en) * | 2022-01-26 | 2024-02-06 | 贵州路桥集团有限公司 | Anti-seismic device and anti-seismic structure for bridge |
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