CN214033332U

CN214033332U - Transverse viscous fluid damper and bridge structure

Info

Publication number: CN214033332U
Application number: CN202022421627.8U
Authority: CN
Inventors: 汪正兴; 吕江; 李东超; 尹琪; 盛能军; 刘鹏飞; 张汉卫; 陶金峰; 王泽豪; 程震; 谢世达; 赵海威; 赵智达
Original assignee: China Railway Major Bridge Engineering Group Co Ltd MBEC; China Railway Bridge Science Research Institute Ltd; China Railway Bridge Research Technology Co Ltd
Current assignee: China Railway Major Bridge Engineering Group Co Ltd MBEC; China Railway Bridge Science Research Institute Ltd; China Railway Bridge Research Technology Co Ltd
Priority date: 2020-10-27
Filing date: 2020-10-27
Publication date: 2021-08-24
Anticipated expiration: 2030-10-27

Abstract

The utility model relates to a horizontal viscous fluid damper, include: the damper comprises a piston rod and a connector connected with the piston rod; the connector is movably assembled on the support structure; the coupling head may be rotatable in the carrier structure and/or the coupling head may be movable in the carrier structure in a first direction different from the axial direction of the piston rod. The transverse viscous fluid damper is used for damping transverse vibration of a bridge, and acting force of longitudinal movement of a bridge tower on the transverse viscous fluid damper can be effectively relieved while the bridge is subjected to transverse vibration resistance, so that the transverse viscous fluid damper is not influenced by longitudinal movement between the bridge towers, and the vibration resistance of the bridge structure is improved.

Description

Transverse viscous fluid damper and bridge structure

Technical Field

The utility model relates to a bridge structures damping antidetonation field, in particular to horizontal viscous fluid damper and bridge structures.

Background

With the rapid advancement of traffic infrastructure construction to western high-intensity areas, bridge engineering will face higher risk of earthquake damage. Especially, the construction of Sichuan-Tibet railways and Sichuan-Tibet highways will make bridge structures face severe earthquake tests. At present, a viscous fluid damper is arranged in a longitudinal bridge direction of a large-span bridge, so that vibration energy between tower beams can be dissipated quickly and efficiently, and the large-span bridge is an effective vibration reduction measure.

However, the inventor researches and discovers that in some related technologies, the transverse bridge direction of the bridge is only provided with the transverse limiting device, and the requirement on earthquake resistance in high-intensity areas is not met. In addition, related technologies provide an inclined damping constraint system, viscous dampers in the damping system are symmetrically arranged along the central axis of a main beam and form a certain included angle with the direction along the bridge, and displacement of a large-span bridge along the bridge direction and the transverse bridge direction can be controlled simultaneously. However, the transverse bridge damping force and the longitudinal bridge damping force provided by the inclined damping constraint system have certain coupling, and in practical application, whether the damper arrangement mode can reach a design target under the action of earthquake motion with randomness and uncertainty is not provided, and corresponding verification research is lacked. Therefore, it is necessary to provide a viscous fluid damper suitable for transverse seismic resistance of a bridge, so as to improve the seismic performance of a bridge structure.

Disclosure of Invention

The embodiment of the utility model provides a horizontal viscous fluid damper and bridge structures, when keeping horizontal antidetonation to the bridge, can change the influence of longitudinal motion to horizontal viscous fluid damper between the tower roof beam, improve anti-seismic performance.

In a first aspect, there is provided a transverse viscous fluid damper comprising: the damper comprises a piston rod and a connector connected with the piston rod; the connector is movably assembled on the support structure; wherein the connecting head is rotatable in the carrier structure and/or the connecting head is movable in the carrier structure in a first direction which is different from the axial direction of the piston rod.

In some embodiments, the first direction is perpendicular to an axial direction of the piston rod.

In some embodiments, the support structure comprises a rail for securing to a bridge tower, the rail defining the first direction.

In some embodiments, the connecting head is connected to a sliding block, and the sliding block is slidably assembled to the guide rail.

In some embodiments, the connecting head is hinged to the slider.

In some embodiments, the contact surface of the sliding block and the support structure is provided with a wear-resistant polymer material.

In some embodiments, pistons and the same number of damping valves and check valves are arranged in the damper; the damping valves and the one-way valves are arranged at intervals and are uniformly distributed on the piston.

In a second aspect, there is provided a bridge structure using the transverse viscous fluid damper, comprising: a pylon to which the support structure is secured; the main beam, the attenuator is fixed in the main beam.

In some embodiments, an embedded anchor bolt and an embedded steel plate are embedded in the bridge tower, and the support structure is fixed with the embedded anchor bolt through a high-strength bolt.

In some embodiments, the main beam is internally provided with a space for the piston rod to move.

The utility model provides a beneficial effect that technical scheme brought includes:

the embodiment of the utility model provides a horizontal viscous fluid damper and use bridge structures of this horizontal viscous fluid damper, because the connector of piston rod can be different from the axial first direction of piston rod to move in supporting structure, consequently at the attenuator during operation, supporting structure can take place the displacement for the attenuator. When the support structure is fixed on the bridge tower and the damper is fixed on the main beam, the bridge tower and the support structure are allowed to displace relative to the damper when the damper works, so that the transverse shock resistance of the bridge can be realized, and the acting force of the longitudinal motion of the bridge tower on the transverse viscous fluid damper can be effectively eliminated, so that the transverse viscous fluid damper is not influenced by the longitudinal motion between the bridge towers, and the shock resistance of the bridge structure is improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a vertical installation layout view of a transverse viscous fluid damper according to an embodiment of the present invention;

fig. 2 is a cross-sectional view of a support structure of a transverse viscous fluid damper according to an embodiment of the present invention in an operating state;

in the figure, 1, a piston rod; 2. a connector; 3. a scaffold structure; 4. a slider; 5. a piston; 6. A damping valve; 7. a one-way valve; 8. a bridge tower; 9. a main beam; 10, embedding anchor bolts; 11, pre-burying a steel plate; 12. high-strength bolt.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

The embodiment of the utility model provides a horizontal viscous fluid damper, it can be when transversely combatting earthquake to the bridge, effectively dissolve bridge tower longitudinal motion to horizontal viscous fluid damper's effort, make horizontal viscous fluid damper not receive longitudinal motion's between the bridge tower influence, improve bridge construction's anti-seismic performance.

As shown in fig. 1, a transverse viscous fluid damper includes a damper, a piston rod 1, a joint 2, and a support structure 3. Wherein the connector 2 is arranged at the end of the piston rod 1, and the connector 2 is movably assembled in the support structure 3. The coupling head 2 may be rotatable in the carrier structure 3 and/or the coupling head 2 may be movable in the carrier structure 3 in a first direction different from the axial direction of the piston rod 1. In the in-service use in-process, be fixed in the beam wall of girder 9 with the attenuator, be fixed in pylon 8 with supporting structure 3, when the pylon 8 takes supporting structure 3 to along the first direction motion, connector 2 can remain stable for supporting structure 3 to can guarantee that the attenuator does not receive the influence of pylon 8 motion. Since the longitudinal displacement between the pylons 8 tends to be perpendicular to the axial direction of the damper piston rod, it is preferred that the first direction is perpendicular to the axial direction of the piston rod 1.

In some embodiments, the supporting structure 3 is provided with a guide rail, and the connector 2 is clamped to the supporting structure 3 through the guide rail; the joining head 2 is movable along the guide rail in a first direction.

As shown in fig. 1, in some embodiments, to better move the mounting structure 3 relative to the attachment head 2, it may be achieved by providing a slider 4. The slide block 4 is arranged in the support structure 3 and can move in the support structure 3; the connecting head 2 is connected with the sliding block 4. The slider 4 moves more smoothly in the support structure 3, and can drive the connector 2 to move more smoothly relative to the support structure 3. Preferably, the contact surface of the sliding block 4 and the support structure 3 is provided with a wear-resistant polymer material.

As shown in fig. 2, the travel of the slide 4 in the carrier structure 3 is S, which satisfies the maximum design displacement in the longitudinal direction between the pylon 8 and the main beam 9. When longitudinal relative displacement occurs between the bridge tower 8 and the main beam 9, the damper and the support structure 3 are driven to slide relatively, so that the influence of the longitudinal relative displacement on the damper is eliminated, and the damper can be kept in the original working state to provide a transverse damping effect.

In some embodiments, as shown in fig. 1, the connecting head 2 is spherical, and the slider 4 has a hinge surface matching the spherical shape and is hinged to the connecting head 2. Be the ball pivot between slider 4 and the connector 2, can realize the universal rotation between slider 4 and the connector 2 to hold the rotation of more angles. When the bridge tower 8 moves in multiple directions relative to the damper, corresponding movable accommodation degree can be provided, the influence of the movement on the damper is eliminated, and the requirement of turning angles in any directions during relative movement between the bridge tower and the main beam can be met.

In some embodiments, as shown in fig. 1, the damper is provided with a cylinder filled with viscous damping fluid, a piston 5, and the same number of damping valves 6 and check valves 7. The damping valve 6 and the check valve 7 may control the flow and blocking of the viscous damping fluid. When the damper is in a stretching state, the one-way valve 7 works to enable viscous damping fluid to smoothly pass through; the damping valve 6 operates to provide some resistance to the passage of viscous damping fluid when the damper is in a compressed state. Preferably, the magnitude of the resistance can be adjusted by adjusting the damping valve 6. In order to make the resistance uniformly act on the viscous damping fluid, the damping valve 6 and the check valve 7 may be spaced apart and uniformly distributed on the piston 5.

As shown in fig. 1, there is also provided in some embodiments a bridge structure using a transverse viscous fluid damper, including: pylons 8 and main girders 9. The support structure 3 is fixed to the bridge tower 8; the damper is fixed to the main beam 9. Since the mounting structure 3 is movable in a first direction relative to the attachment head 2 and correspondingly the pylons 8 are movable in a first direction relative to the dampers, when longitudinal movement occurs between the pylons 8, the pylons can move relative to the dampers within a certain range of motion if the longitudinal movement coincides with the first direction, without affecting the operation of the dampers.

In some embodiments, the damper is bolted to the main beam 9, and the right end of the damper is fixed to the main beam 9, as shown in fig. 1. The space for the movement of the piston rod 1 is reserved in the main beam 9, so that the size requirement for the installation of the damper can be reduced, and the stress rationality is improved. Preferably, the installation number of the dampers is even, and the dampers are symmetrically arranged on the main beam 9, so that the damping effect is always exerted when the transverse reciprocating relative motion occurs between the bridge towers.

As shown in fig. 1, in some embodiments, an anchor bolt 10 and an embedded steel plate 11 are embedded in the bridge tower 8, and the support structure 3 is fixed with the anchor bolt 10 by a high-strength bolt 12. When the piston rod 1 is stretched, the acting force is sequentially transmitted to the sliding block 4 through the connector 2, and the support structure 3 is finally transmitted to the embedded anchor bolt 10 through the high-strength bolt 12. When the piston rod 1 is compressed, the acting force is sequentially transmitted to the support structure 3 through the sliding block 4 and finally transmitted to the bridge tower 8 through the embedded steel plate 11.

In some embodiments, a transverse viscous fluid damper is mounted in the gap between the bridge tower and the main beam 9 in the transverse direction. The damper and the main beam 9 are fixedly connected through a whole circle of bolts, a space for movement of the piston rod is reserved inside the main beam 9, the installation size of the damper is reduced in the mode, and the stress rationality is improved. The connecting head 2 of the piston rod 1 of the damper is arranged in a ball head structure, a fixed cover plate is connected to the sliding block 4, and the connecting mode can meet the rotation requirement between the piston rod and the sliding block 4. The planar tetrafluoro plates are installed on the left side and the right side of the sliding block 4, when the damper is pressed, the left planar tetrafluoro plate can freely slide in the longitudinal bridge direction of the stainless steel plate at the position of the embedded steel plate 11, when the damper is pulled, the right planar tetrafluoro plate can freely slide in the longitudinal bridge direction of the stainless steel plate at the position of the support structure 3, and the embedded steel plate 11 and the support structure 3 are fixedly connected with the embedded anchor bolt 10 through bolts. Two hydraulic valves are mounted on the piston 5: a damping valve 6 and a non-return valve 7. When the damper is pressed, hydraulic oil can only pass through the damping valve 6, and the damping force required by design is provided; when the damper is pulled, the check valve 7 is opened, hydraulic oil can smoothly pass through the check valve 7, and the pulling force is only the friction force of the damper system. Considering that the bridge tower structure is generally a concrete structure, the bridge tower structure can bear a certain degree of pressure but cannot bear excessive tensile force. In order to protect the stability of the pylon structure from the tensile forces exerted by the damper during movements of the pylon in the opposite direction relative to the main girders, the damper is arranged to provide a damping force only when compressed.

The damper has the advantages that the damper only plays a role in transverse relative movement between the bridge towers, and the magnitude of the provided damping force is not influenced by other movement directions and movement positions between the bridge towers.

In the description of the present invention, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

It is noted that, in the present invention, relational terms such as "first" and "second", and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The above description is only exemplary of the invention, and is intended to enable those skilled in the art to understand and implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A transverse viscous fluid damper, comprising:

the damper comprises a piston rod (1) and a connector (2) connected with the piston rod (1);

the connector (2) is movably assembled on the support structure (3); wherein the content of the first and second substances,

the connecting head (2) can rotate on the support structure (3), and/or

The connecting head (2) is movable in the support structure (3) in a first direction which is different from the axial direction of the piston rod (1).

2. A transverse viscous fluid damper according to claim 1, wherein the first direction is perpendicular to the axial direction of the piston rod (1).

3. A transverse viscous fluid damper according to claim 1, wherein the mounting structure (3) comprises a guide rail for attachment to a bridge tower (8), the guide rail defining the first direction.

4. A transverse viscous fluid damper according to claim 3,

the connector (2) is connected with a sliding block (4), and the sliding block (4) is slidably assembled on the guide rail.

5. A transverse viscous fluid damper according to claim 4, wherein the connecting head (2) is hinged to the slider (4).

6. A transverse viscous fluid damper according to claim 4,

and the contact surface of the sliding block (4) and the support structure (3) is provided with a wear-resistant high polymer material.

7. A transverse viscous fluid damper according to claim 1,

a piston (5) and damping valves (6) and one-way valves (7) with the same number are arranged in the damper;

the damping valves (6) and the one-way valves (7) are arranged at intervals and are uniformly distributed on the piston (5).

8. A bridge construction using a transverse viscous fluid damper as claimed in claim 1, comprising:

a bridge tower (8), said support structure (3) being fixed to said bridge tower (8);

a main beam (9), the damper being fixed to the main beam (9).

9. The bridge construction of claim 8,

pre-buried anchor bolt (10) and buried steel plate (11) have in bridge tower (8), just supporting structure (3) through high strength bolt (12) with anchor bolt (10) are fixed.

10. The bridge construction according to claim 8, characterized in that the main beam (9) has a space inside for the movement of the piston rod (1).