CN118326808A

CN118326808A - Vibration isolation support for bridge structure and bridge structure thereof

Info

Publication number: CN118326808A
Application number: CN202410582164.3A
Authority: CN
Inventors: 王迅; 贾晓东; 赵阳
Original assignee: Chongqing Business Vocational College Of Chongqing Open University
Current assignee: Chongqing Business Vocational College Of Chongqing Open University
Priority date: 2024-05-10
Filing date: 2024-05-10
Publication date: 2024-07-12

Abstract

The invention relates to a vibration isolation support for a bridge structure, which comprises a load transfer component, a base component, a primary vibration isolation working component and a secondary vibration isolation working component, wherein the primary vibration isolation working component can perform energy dissipation work under an initial load so as to meet vibration isolation requirements under a low load, and when the load is serious, the secondary vibration isolation working component can be triggered based on continuous downward movement generated by the load transfer component after the primary vibration isolation working component is triggered, so that the primary vibration isolation working component and the primary vibration isolation working component can jointly perform energy dissipation work, and further, better vibration isolation effect can be realized when the load faces serious vibration load.

Description

Vibration isolation support for bridge structure and bridge structure thereof

Technical Field

The invention relates to the technical field of bridges, in particular to a vibration isolation support for a bridge structure and the bridge structure thereof.

Background

The bridge support is arranged between the upper structure and the abutment and mainly used for transmitting each load of the upper structure to the abutment. In the prior art, in order to realize the stability and vibration reduction of bridge structures, rubber vibration isolation supports, such as natural rubber supports or lead rubber supports, are mostly arranged on the bridge, wherein the former has the advantage of low cost, but the vibration isolation function is not obvious enough, and the latter has better vibration isolation effect but serious pollution to the environment. Moreover, the existing vibration isolation support for the bridge has the defect that the vibration isolation effect is limited and the vibration isolation requirements under various conditions cannot be met.

Therefore, it is necessary to design a novel vibration isolation support for bridge structures.

Disclosure of Invention

In view of the above, the present invention provides a vibration isolation mount for bridge structures, which has two-stage vibration isolation and can achieve a relatively good vibration isolation effect.

The invention discloses a vibration isolation support for a bridge structure, which comprises a load transmission component, a foundation component, a primary vibration isolation working component and a secondary vibration isolation working component, wherein the primary vibration isolation working component and the secondary vibration isolation component are both arranged on the foundation component; wherein the primary vibration isolation work assembly is configured to form a floating support for the load transfer member such that the load transfer member is supported above the base member, the primary vibration isolation work assembly being capable of performing an energy dissipating work in response to the vibratory load to which the load transfer member is subjected when the load transfer member is initially subjected to the vibratory load; the secondary vibration isolation work assembly is configured to be triggered based on continued downward movement of the load transfer member after the primary vibration isolation work assembly is triggered such that it is capable of energy dissipating work in concert with the primary vibration isolation work assembly.

Based on the vibration isolation support, when the vibration load is slight, only the primary vibration isolation working assembly is excited to dissipate vibration energy, and when the vibration load is severe, the secondary vibration isolation working assembly can be excited to do work together with the primary vibration isolation working assembly to dissipate energy.

According to the vibration isolation mount for the bridge construction disclosed in the first aspect of the present invention, wherein the secondary vibration isolation assembly includes a transmission rod and a rotary damper, the transmission rod is configured to be able to convert downward movement of the load transmission member due to the vibration load into rotational movement of the rotary member in the rotary damper, so that the rotary damper can provide damping.

The rotary damper is a device using an oily liquid as a damping liquid, and may be also called a torsional damper. The main working principle is as follows: the damping liquid cavity is internally provided with a damping block which divides the damping liquid cavity into two parts, and the damping block is provided with damping holes which are used for communicating the damping liquid cavity divided into the two parts; under the action of external force (usually external energy needing to be dissipated), the damping block can be driven to slide in the damping liquid cavity, and in the sliding process, damping liquid in one part of the damping liquid cavity can enter into the other part of the damping liquid cavity from the damping hole under the action of pressure, and thus damping effect is generated in the process. In the present invention, the specific structure of the rotary damper used can be realized here by means of the prior art, as long as structural adaptations of the base element and the transmission rod can be satisfied.

By means of the drive rod, the vertical movement generated by the vibration load can be converted into a rotational movement of the rotating member (i.e. the damping mass) in the rotary damper, so that a further secondary vibration isolation is achieved by means of the rotary damper.

According to the vibration isolation support for the bridge structure disclosed in the first aspect of the invention, the transmission rod is rotatably arranged on the base member around the axis of the transmission rod, and the axial extending direction of the transmission rod points to the load transmission member; the transmission rod is a cylindrical cam body, a curve profile is arranged on the cylindrical cam body, a protruding part is arranged on one side of the load transmission member, which faces the base member, a push head is arranged on the protruding part, and the push head can keep contact with the curve profile to form a cylindrical cam mechanism together with the transmission rod. The driving rotation of the transmission rod can be well realized by means of the cylindrical cam mechanism, so that the rotation motion is transmitted into the rotary damper by means of the transmission rod, and vibration isolation work is further generated.

According to the vibration isolation support for the bridge structure disclosed by the first aspect of the invention, the curve outline is the curve groove which is spirally distributed on the side wall of the transmission rod, and the head part of the push head can be inserted into the curve groove to form contact fit.

According to the vibration isolation support for the bridge structure disclosed by the first aspect of the invention, the outer side of the upper part of the transmission rod is provided with a trigger travel groove extending downwards from the end part, and the tail end of the trigger travel groove is communicated with the curve groove; in an initial state after the vibration isolation support is installed, the end part of the push head is received in the trigger travel groove, and can generate relative movement in the trigger travel groove when the load transmission member moves due to vibration load; when the downward movement of the load transfer member due to the vibration load brings the pusher into the curved slot, the drive rod can be driven to generate a rotational movement to operate the rotary damper.

According to the vibration isolation mount for bridge construction disclosed in the first aspect of the present invention, wherein the protrusion has the slot opened downward in the vertical direction, the push head is formed on the inner wall of the slot and extends radially inward of the slot, the upper portion of the transmission rod is inserted into the slot, and the push head is received in the trigger stroke slot in the initial state.

According to the vibration isolation support for the bridge structure disclosed by the first aspect of the invention, the foundation member is provided with the caulking groove with an upward opening in the vertical direction, and the protruding part is inserted into the caulking groove from top to bottom; the protrusion has a cone section with a cross section gradually decreasing from top to bottom; the first-stage vibration isolation working assembly comprises first-stage vibration isolation working units which extend along the transverse direction of the base member, wherein the first-stage vibration isolation working units are distributed around the circumferential direction of the cone section, and the tail end execution parts of the first-stage vibration isolation working units extend into the caulking grooves; the primary vibration isolation working unit is configured to provide elastic cushioning with the end effector thereof in tapered contact engagement with the outer surface of the cone section so as to provide elastic cushioning in the transverse direction of the base member upon downward displacement of the load transfer member.

According to the vibration isolation support for the bridge structure disclosed by the first aspect of the invention, the first-stage vibration isolation working unit further comprises a plug and an elastic piece, and the elastic piece is positioned between the end execution part and the plug.

According to the vibration isolation support for the bridge structure disclosed by the first aspect of the invention, the elastic piece is elastic rubber and/or a spring.

The second aspect of the invention discloses a bridge structure, which comprises a beam body and a pier, and further comprises the vibration isolation support for the bridge structure disclosed in the first aspect of the invention, wherein the beam body is supported and arranged on the pier by means of the vibration isolation support.

The beneficial effects are that: in the invention, as the two-stage vibration isolation is arranged, the first-stage vibration isolation working assembly can perform energy dissipation work under the initial load so as to meet the vibration isolation requirement under the low load, and when the load is serious, the second-stage vibration isolation working assembly can be triggered based on the continuous downward movement generated by the load transfer member after the first-stage vibration isolation working assembly is triggered, so that the second-stage vibration isolation working assembly can perform energy dissipation work together with the first-stage vibration isolation working assembly, and further, the better vibration isolation effect can be realized when the load faces serious vibration load.

The vibration isolation mount for bridge construction and the bridge construction thereof according to the present invention are disclosed in detail below with reference to the embodiments shown in the drawings.

Drawings

Figure 1 shows a schematic external view of the overall structure of the present invention.

Figure 2 shows a vertical cross-section of the overall structure of the invention.

Fig. 3 shows an enlarged view at a in fig. 2.

Fig. 4 shows a schematic structural view of a transmission rod in the present invention.

FIG. 5 is a schematic view showing a sectional structure in the direction B-B in FIG. 2, which is an internal structural view of one embodiment of the rotary damper.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other.

Figure 1 shows a schematic external view of the overall structure of the present invention. Figure 2 shows a vertical cross-section of the overall structure of the invention. Fig. 3 shows an enlarged view at a in fig. 2. Fig. 4 shows a schematic structural view of a transmission rod in the present invention. Figure 5 shows an internal block diagram of one embodiment of a rotary damper of the present invention.

Referring to fig. 1, the invention discloses a vibration isolation support for a bridge structure, which comprises a load transmission member 1 and a foundation member 2. Wherein, in specific use, the vibration isolation mount of the present invention is installed between the bridge body and the abutment to support the body on the abutment. In particular, the base member 2 is placed or secured on the abutment, while the top of the load transfer member 1 is in direct contact with the bridge body or is mated with Liang Tixing by means of other auxiliary or transition elements (e.g., pads). Of course, those skilled in the art will appreciate that the vibration isolation mount of the present invention can be used in plural at the same time to achieve sufficient support strength for the bridge beam.

The vibration isolation support of the invention comprises a two-stage vibration isolation working assembly, specifically a first-stage vibration isolation working assembly and a second-stage vibration isolation working assembly, which are shown in combination with fig. 2. The primary vibration isolation working assembly and the secondary vibration isolation working assembly are sequentially and independently subjected to energy dissipation working, the primary vibration isolation working assembly and the secondary vibration isolation working assembly can be triggered firstly, and the secondary vibration isolation working assembly and the primary vibration isolation working assembly can be triggered again when the load is large, so that the vibration load buffering work is completed together.

Specifically, the primary vibration isolation working assembly and the secondary vibration isolation assembly are both arranged on the base member 2; wherein the primary vibration isolation working assembly is configured to form a floating support for the load transfer member 1 such that the load transfer member 1 is supported above the base member 2, the primary vibration isolation working assembly being capable of performing an energy dissipation work in response to a vibration load to which the load transfer member 1 is subjected when the load transfer member 1 is initially subjected to the vibration load; the secondary vibration isolation working assembly is configured to be able to be triggered based on continued downward movement of the load transfer member 1 after the primary vibration isolation working assembly is triggered so that it can perform energy dissipating work in conjunction with the primary vibration isolation working assembly. The floating support is a state in which the load transmission member 1 is supported by means of the primary vibration isolation working assembly, rather than the load transmission member 1 being directly rigidly connected to the base member 2, and thus being suspended from the base member 2. By means of this floating support, when the load transmitting member is subjected to a vibration load, the vibrational energy generated by it is first transferred into the primary vibration isolation assembly, rather than directly onto the base member 2, thereby reducing or even what may be referred to as shutting off the transmission of the vibration load to the bridge abutment.

When the primary vibration isolation working assembly is triggered first, if the load transmission member 1 continues to move downward because of the excessive vibration load at this time, the triggering of the secondary vibration isolation working assembly at this time becomes possible. Of course, the vibration isolation support of the present invention can have a secondary vibration isolation triggering preset stroke, and the secondary vibration isolation working assembly is triggered only after the displacement of the load transmission member 1 due to the load exceeds the secondary vibration isolation triggering preset stroke. The size of the secondary vibration isolation trigger preset stroke can be defined by the length range of the trigger stroke slot to be mentioned below.

As shown in fig. 2, the base member 2 has a caulking groove 3 with an upward opening in the vertical direction, and the protruding portion 4 is inserted into the caulking groove 3 from top to bottom; the protrusion 4 has a cone section 5 with a gradually decreasing cross section from top to bottom; the primary vibration isolation work assembly includes a plurality of primary vibration isolation work units extending in the transverse direction of the base member 2, distributed around the circumferential direction of the cone section 5. Specifically, a plurality of transverse through grooves are formed in the base member 2, and a primary vibration isolation working unit is arranged in each through groove.

The primary vibration isolation working unit comprises an end execution part 6, a plug 7 and an elastic piece 8, wherein the elastic piece 8 is positioned between the end execution part 6 and the plug 7, and the end execution part 6 extends into the caulking groove 3. The primary vibration isolation working unit is configured to provide elastic damping, and the end effector 6 is provided with a tapered mating portion 14 at an end thereof, which is in tapered contact with the outer surface of the cone section 5, so as to provide elastic damping in the lateral direction of the base member 2 when the load transmission member 1 is displaced downward.

In a preferred embodiment, the elastic member 8 is an elastic rubber and/or a spring.

When the load transmission member 1 moves downwards due to the vibration load, the end effector 6 of the primary vibration isolation unit and the outer surface of the cone section 5 form conical surface fit, so that the end effector 6 can be pressed in the through groove to move outwards, and the elastic piece 8 is compressed, so that buffering is provided. By means of the transversely arranged primary vibration isolation units, vertical movement caused by load is buffered in the transverse direction, and therefore the vertical dimension and required installation space of the vibration isolation support are reduced well.

In addition, as shown in connection with fig. 2, the secondary vibration isolation assembly includes a transmission rod 9 and a rotary damper, the transmission rod 9 being configured to be able to convert a downward movement of the load transmission member 1 due to a vibration load into a rotational movement of a rotary member in the rotary damper, so that the rotary damper can provide damping.

By means of the transmission rod 9, the vertical movement generated by the vibration load can be converted into a rotational movement of the rotary member (i.e. the damping mass) in the rotary damper, so that a further secondary vibration isolation is achieved by means of the rotary damper.

Specifically, the transmission rod 9 is rotatably provided on the base member 2 about its own axis by means of a bearing member, and its axial extending direction is directed toward the load transmitting member 1; the transmission rod 9 is a cylindrical cam body provided with a curved profile, the side of the load transmission member 1 facing the base member 2 is provided with a projection, the projection is provided with a push head 11, and the push head 11 can be kept in contact with the curved profile to form a cylindrical cam mechanism together with the transmission rod 9. The driving rotation of the transmission rod 9 can be well realized by means of a cylindrical cam mechanism, so that the transmission rod 9 is used for transmitting the rotation motion into the rotary damper, and vibration isolation work is generated.

As shown in fig. 3 and 4, the curved profile is a curved groove 10 which is spirally arranged on the side wall of the transmission rod 9, and the head of the push head 11 can be inserted into the curved groove 10 to form contact fit.

As shown in fig. 3, the outer side of the upper part of the transmission rod 9 is provided with a trigger travel groove 12 extending downwards from the end part, and the tail end of the trigger travel groove 12 is communicated with a curve groove 10; in an initial state after the vibration isolation mount is mounted, the end of the push head 11 is received in the trigger travel groove 12 and is capable of producing a relative movement in the trigger travel groove 12 when the load transmitting member 1 is moved by the vibration load; when the downward movement of the load transmitting member 1 due to the vibration load brings the pusher head 11 into the curved groove 10, the transmission rod 9 can be driven to generate a rotational movement to operate the rotary damper.

In addition, the projection 4 has a slot 13 opening downward in the vertical direction, the push head 11 is formed on the inner wall of the slot 13 and extends radially inward of the slot 13, the upper portion of the transmission lever 9 is inserted into the slot 13, and the push head 11 is received in the trigger stroke slot 12 in the initial state.

That is, in the initial state, the pusher 11 is located in the trigger travel groove 12; when the load transmission member 1 moves downwards due to vibration load, the push head 11 can move along the trigger travel groove 12, and when the load is overlarge, the push head 11 enters the curve groove 10 from the trigger travel groove 12, the transmission rod 9 is driven to generate rotary motion due to the cylindrical cam mechanism formed by the push head 11 and the curve groove 10, so that the buffer work by means of the rotary damper is realized. It will be appreciated by those skilled in the art that the load transfer member 1 will not undergo rotational movement due to its mating relationship with the beam.

At a certain moment, when the downward load of the load transmission member 1 disappears, the load transmission member 1 can be reset upwards by means of the conical surface contact between the end effector 6 of the first vibration isolation working unit and the cone section 5, and in the process, the rotary damper can be driven to reset due to the cooperation of the push head 11 and the curve groove 10.

In the invention, the working parameters of the rotary damper are set to be matched with the parameters of the elastic piece 8 in the first vibration isolation working unit, namely, the fluid viscosity of damping fluid in the rotary damper cannot influence the reset of the elastic piece 8, thereby ensuring that the first vibration isolation working unit and the second vibration isolation working assembly can be reset.

In the present invention, the so-called rotary damper is a device using an oily liquid as a damping liquid, and may also be called a torsional damper. As shown in fig. 5, the present invention provides a structural embodiment of a rotary damper, which mainly works as follows: a damping liquid cavity 15 is arranged in the damping liquid cavity 15, a damping block 16 is arranged in the damping liquid cavity 15, the damping block 16 divides the damping liquid cavity 15 into two parts, a damping hole 17 is arranged on the damping block 16, and the damping liquid cavity 15 divided into two parts is communicated by means of the damping hole 17; under the influence of an external force (usually external energy that needs to be dissipated), the damping mass 16 can be driven to slide in the damping fluid chamber 15, during which the damping fluid in one part of the damping fluid chamber 15 will enter from the damping orifice 17 into another part of the damping fluid chamber 15 under the influence of pressure, during which damping action is thereby created. In the present invention, the specific construction of the rotary damper used can be realized here by means of the prior art, as long as structural adaptations of the base element 2 and the transmission rod 9 can be satisfied.

As shown in connection with fig. 5, the rotary damper further has a power input 18, which power input 18 can be part of the transmission rod 9, i.e. in an integrated structure with the aforementioned transmission rod 9. Furthermore, in the present invention, the damping fluid chamber 15 of the rotary damper can be constructed directly on the base member 2.

The invention also provides a bridge structure which comprises a beam body, a pier and the vibration isolation support, wherein the beam body is supported and arranged on the pier by means of the vibration isolation support.

Spatially relative terms, such as "above … …," "above … …," "upper surface on … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and the claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the application described herein may be capable of being practiced otherwise than as specifically illustrated and described. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present invention, which is intended to be covered by the scope of the claims of the present invention.

Claims

1. The vibration isolation support for the bridge structure is characterized by comprising a load transmission member, a base member, a primary vibration isolation working assembly and a secondary vibration isolation working assembly, wherein the primary vibration isolation working assembly and the secondary vibration isolation assembly are both arranged on the base member;

Wherein the primary vibration isolation work assembly is configured to form a floating support for the load transfer member such that the load transfer member is supported above the base member, the primary vibration isolation work assembly being capable of energy dissipating work in response to a vibratory load received by the load transfer member when the load transfer member is initially subjected to the vibratory load;

The secondary vibration isolation working assembly is configured to be triggered based on continued downward movement of the load transfer member after the primary vibration isolation working assembly is triggered such that it is capable of energy dissipating work in concert with the primary vibration isolation working assembly.

2. The vibration isolation mount for bridge construction according to claim 1, wherein,

The secondary vibration isolation assembly includes a transfer rod configured to convert downward movement of a load transfer member due to a vibration load into rotational movement of a rotating member in the rotary damper, such that the rotary damper can provide damping.

3. The vibration isolation mount for bridge construction according to claim 2, wherein,

The transmission rod is rotatably arranged on the base member around the axis thereof, and the axial extending direction of the transmission rod points to the load transmission member;

The transmission rod is a cylindrical cam body, a curve profile is arranged on the cylindrical cam body, a protruding part is arranged on one side of the load transmission member facing the base member, a push head is arranged on the protruding part, and the push head can keep contact with the curve profile so as to form a cylindrical cam mechanism together with the transmission rod.

4. The vibration isolation mount for bridge construction according to claim 3, wherein,

The curve profile is a curve groove which is arranged on the side wall of the transmission rod in a spiral mode, and the head of the push head can be inserted into the curve groove to form contact fit.

5. The vibration isolation mount for bridge construction according to claim 4, wherein,

The outer side of the upper part of the transmission rod is provided with a trigger travel groove extending downwards from the end part, and the tail end of the trigger travel groove is communicated with the curve groove;

In an initial state after the vibration isolation support is installed, the end part of the push head is received in the trigger travel groove, and can generate relative movement in the trigger travel groove when the load transmission member generates movement due to vibration load;

when the downward movement of the load transfer member due to the vibration load brings the pusher into the curved slot, the drive rod can be driven to generate a rotational movement to operate the rotary damper.

6. The vibration isolation mount for bridge construction according to claim 5, wherein,

The protrusion has a slot with a downward opening in a vertical direction, the push head is formed on an inner wall of the slot and extends radially inward of the slot, and an upper portion of the transmission rod is inserted into the slot, and the push head is received in the trigger stroke slot in an initial state.

7. The vibration-isolation mount for bridge construction according to any one of claims 1 to 6, wherein,

The foundation member is provided with a caulking groove with an upward opening in the vertical direction, and the protruding part is inserted into the caulking groove from top to bottom;

the protrusion has a cone section with a cross section gradually decreasing from top to bottom;

The primary vibration isolation working assembly comprises primary vibration isolation working units which extend transversely along the base member, wherein the primary vibration isolation working units are distributed around the circumferential direction of the cone section, and the tail end executing parts of the primary vibration isolation working units extend into the caulking grooves;

the primary vibration isolation working unit is configured to provide elastic damping, and an end effector thereof is in tapered contact engagement with an outer surface of the cone section so as to provide elastic damping in a lateral direction of the base member upon downward displacement of the load transmitting member.

8. The vibration isolation mount for bridge construction according to claim 7, wherein,

The first-level vibration isolation working unit further comprises a plug and an elastic piece, and the elastic piece is located between the end execution part and the plug.

9. The vibration isolation mount for bridge construction according to claim 8, wherein,

The elastic piece is elastic rubber and/or a spring.

10. Bridge construction, characterized in that it comprises a girder and a pier, and further comprises a vibration-isolating mount for a bridge construction according to any one of claims 1-9, by means of which the girder is supported on the pier.