CN219297955U

CN219297955U - Stress area bridge vibration control railing arm-extending type damper

Info

Publication number: CN219297955U
Application number: CN202320732713.1U
Authority: CN
Inventors: 许坤; 王寒硕; 刘彬; 王萌
Original assignee: Beijing University of Technology
Current assignee: Beijing University of Technology
Priority date: 2023-04-06
Filing date: 2023-04-06
Publication date: 2023-07-04
Anticipated expiration: 2033-04-06

Abstract

The utility model discloses a stress belt bridge vibration control railing cantilever type damper, which belongs to the technical field of bridge engineering, wherein the stress belt bridge comprises a suspension belt and a plurality of concrete plates uniformly arranged at intervals along the longitudinal direction of the suspension belt, two groups of dampers are arranged on two sides of the stress belt bridge, each group of dampers comprises a cantilever, a chain rod and an axial damping device, the lower end of the cantilever is fixedly connected with the concrete plates, the upper end of the cantilever extends upwards along the normal direction of the concrete plates, two ends of the axial damping device are respectively hinged to the two cantilever through the chain rod, and the two cantilever are erected on two different concrete plates. The device can be well applied to vibration resistance of the stress belt bridge, is convenient to install and stable in control effect, and has the characteristics of light weight, flexibility and the like.

Description

Stress area bridge vibration control railing arm-extending type damper

Technical Field

The utility model belongs to the technical field of bridge engineering, and particularly relates to a stress bridge vibration control railing cantilever type damper.

Background

The stress belt bridge has a slender and flat self-construction due to the absence of the main girder, has smaller self-rigidity than other types of bridges, and the generation of vibration is unavoidable under the action of pedestrians and wind. The vibration of the stress belt bridge can easily cause fatigue damage of the structure so as to influence the safety of the stress belt bridge, and secondly, the comfort of the stress belt bridge can be influenced to a large extent.

In order to keep the stress-zone bridge vibrations within acceptable limits, it is most common practice to mount dampers on bridge structures, such as viscous dampers and tuned mass absorbers. However, the installation of the damper is easily limited by the actual conditions such as the terrain.

For example, when the viscous damper is installed on the stress belt bridge, the viscous damper is basically installed at the bridge deformation maximum position, namely the midspan position, one end of the viscous damper is connected at the midspan position of the bridge, and the other end faces the bottom of the stress belt bridge, and the conditions such as a river canyon and the like are not suitable for connecting the viscous damper. In the method of installing the tuning vibration absorber on the stress belt bridge, the vibration absorber cannot be installed in the inner space of the bridge due to the structural characteristics of the stress belt bridge without a main beam. The installation mode of the bridge on the stress belt bridge is mainly two, one is fixed on the upper part of the bridge deck, and the installation method occupies the use space of the stress belt bridge and prevents the passing of the bridge. The bridge deck is suspended at the lower part of the bridge deck with the stress, and the installation mode not only affects the appearance of the bridge with the stress, but also increases the height of the bridge with the stress to a certain extent, and affects the clearance under the bridge to prevent the navigation of the lower part of the bridge. The damper of the conventional structure is used for controlling the vibration of the stress zone bridge according to the vibration control requirement, and the damper is inconvenient in the aspects of complaint.

Disclosure of Invention

Therefore, the utility model aims to provide the cantilever type damper of the vibration control railing with the stress belt bridge, which can be well applied to vibration resistance of the stress belt bridge, is convenient to install and stable in control effect, and has the characteristics of light weight, flexibility and the like.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

the utility model relates to a stress belt bridge vibration control railing cantilever type damper, which comprises a suspension belt and a plurality of concrete plates uniformly arranged at intervals along the longitudinal direction of the suspension belt, wherein two groups of dampers are arranged on two sides of the stress belt bridge, each group of dampers comprises a cantilever, a chain rod and an axial damping device, the lower end of the cantilever is fixedly connected with the concrete plates, the upper end of the cantilever extends upwards along the normal direction of the concrete plates, two ends of the axial damping device are respectively hinged to the two cantilever through the chain rod, and the two cantilever are erected on two different concrete plates.

Furthermore, two sides of each concrete slab are provided with an extending arm, and a group of axial damping devices are connected between the extending arms on the same side of two adjacent concrete slabs.

Further, the chain rod is connected to the upper end of the extension arm, and the axial damping device is arranged above the concrete slab in parallel.

Further, a shock pad is arranged in the interval between two adjacent concrete plates.

Further, the suspension belt is fixedly connected with the abutment foundation through an anchor.

Further, the concrete slab is fixedly installed on the upper side of the sling by bolts.

Further, the axial damping device is a viscous damper or a friction damper or a tuned mass damper.

Further, the sling is a steel rope or a steel plate or a carbon fiber plate.

The utility model has the beneficial effects that:

the stress bridge vibration control railing cantilever type damper is arranged on two sides of a bridge, so that the damper can also serve as a stress bridge railing, the bridge space can be well utilized, the whole structure is convenient to install, and the control effect is stable.

In the device, two adjacent concrete plates can be connected through the axial damper and the chain rod by arranging the vertical extending arms, and when a bridge vibrates, the rotational deformation of the single concrete plate can be converted into the axial displacement deformation at the position of the handrail through the railing extending arms, so that the vibration energy of the bridge is consumed by the axial damper at the position of the handrail, and the purpose of controlling the vibration of the bridge is achieved.

Additional advantages, objects, and features of the utility model will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the utility model. The objects and other advantages of the utility model may be realized and obtained by means of the instrumentalities and combinations particularly pointed out in the specification.

Drawings

In order to make the objects, technical solutions and advantageous effects of the present utility model more clear, the present utility model provides the following drawings for description:

FIG. 1 is a schematic view of a stress belt bridge according to the present utility model;

FIG. 2 is a schematic view of a railing arm-extending damper according to the present utility model

FIG. 3 is a schematic longitudinal section of a railing boom type damper of the present utility model.

The figures are marked as follows: concrete slab 1, sling 2, arm 3, railing handrail 4, damping pad 5, axial damper 6, bolt 7, articulated joint 8.

Detailed Description

As shown in fig. 1 to 3, the stress zone bridge vibration control railing arm-extending type damper comprises a suspension zone 2 and a plurality of concrete plates 1 which are uniformly arranged at intervals along the longitudinal direction of the suspension zone 2, and of course, the stress zone bridge vibration control railing arm-extending type damper also comprises a bridge abutment foundation and a railing, wherein two ends of the suspension zone 2 are fixedly connected with the bridge abutment foundation through anchor nails, a steel rope or a steel plate or a carbon fiber plate is adopted for the suspension zone 2, the concrete plates 1 are fixedly connected above the two groups of suspension zones 2, and the suspension zone 2 is arranged along the longitudinal direction of the bridge and is used for limiting the concrete plates 1.

Specifically, the dampers have two groups, and the two groups of dampers are arranged on both sides of the stress belt bridge. Each group of dampers comprises an extension arm 3, a chain rod and an axial damping device, wherein the axial damping device can adopt a viscous damper or a friction damper or a tuned mass damper, and the axial damping device can be selected according to the requirement. The axial damper 6 is only subjected to axial forces and not to bending moments. The axial dampers 6 are distributed along the longitudinal bridge direction, and the positions of the axial dampers 6 are on the same horizontal line.

The cantilever 3 is made of steel or a concrete filled steel tube structure or a composite material, the lower end of the cantilever 3 is fixedly connected with the concrete slab 1, the cantilever 3 can be connected with the bridge deck slab steel structure through a pre-buried anchoring piece, the upper end of the cantilever 3 extends upwards along the normal direction of the concrete slab 1, the cantilever 3 is fixedly arranged in the middle of the edge of the concrete slab 1, two ends of the axial damping device are respectively hinged to the two cantilever 3 through chain rods, and the two cantilever 3 are erected on two different concrete slabs 1. The upper part of the railing arm 3 is reserved with a hinge joint 8, the axial damper 6 is connected with the arm 3 through a chain rod, the concrete connection mode is that the left end of the axial damper is hinged with the left chain rod, the left chain rod is hinged with the hinge joint 8 of the arm 3 on the left concrete slab 1, the right end of the axial damper is hinged with the right chain rod, and the right chain rod is hinged with the hinge joint 8 of the arm 3 on the right concrete slab 1.

In this embodiment, two extending arms 3 are disposed on two sides of each concrete slab 1, that is, two extending arms 3 are disposed on two sides of the bridge along the transverse direction of the concrete slab 1, and a group of dampers are disposed between the extending arms 3 on the same side of the bridge and the corresponding axial dampers 6. A group of axial damping devices are connected between the same side extending arms 3 on two adjacent concrete slabs 1 in side view. The chain bar is connected to the upper end of the boom 3 and the axial damping device is arranged in parallel above the concrete slab 1 in normal state.

In this embodiment, a shock pad is disposed in the interval between two adjacent concrete slabs 1, and the shock pad adopts a rubber shock pad, so that the position between two concrete slabs 1 can be buffered.

In this embodiment, the concrete slab 1 is fixedly installed on the upper side of the sling 2 by the bolts 7, so that installation and maintenance can be facilitated.

According to the device, the axial damper 6 is connected to the top end of the cantilever arm 3, bending deformation during stress bridge vibration is converted into axial deformation of the handrail through the cantilever arm 3, so that relative axial deformation is generated at two ends of the handrail, and the axial damper 6 inhibits the relative axial deformation at two ends of the handrail to consume energy, so that the purpose of controlling the stress bridge vibration is achieved. Wherein the railing arm 3 can amplify the bridge vibration deformation to achieve better vibration control effect.

The railing arm-extending type damper can also serve as a stress-zone bridge railing, can well utilize bridge space, and is different from a viscous damper and a tuned absorber, the structure does not need complicated installation requirements and use conditions, and the railing arm-extending type damper does not change structural characteristics of the stress-zone bridge and does not influence the practicability and the attractiveness of the bridge. The railing arm-extending type damper is a passive control damper, actual data feedback and parameter adjustment are not needed, the application range is wide, and the requirement on working conditions is low. The railing arm-extending type damper can be applied to other flexible structures, and the positions of the dampers only need to be reasonably arranged aiming at other flexible structures.

Finally, it is noted that the above-mentioned preferred embodiments are only intended to illustrate rather than limit the utility model, and that, although the utility model has been described in detail by means of the above-mentioned preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the utility model as defined by the appended claims.

Claims

1. The utility model provides a stress area bridge vibration control railing arm-extending formula attenuator, the stress area bridge includes the sling, along a plurality of concrete slabs of the even interval setting of longitudinal direction in sling, its characterized in that: two groups of dampers are arranged on two sides of the stress belt bridge, each group of dampers comprises an extension arm, a chain rod and an axial damping device, the lower ends of the extension arms are fixedly connected with a concrete slab, the upper ends of the extension arms extend upwards along the normal direction of the concrete slab, two ends of the axial damping devices are hinged to two extension arms through the chain rod respectively, and the two extension arms are erected on two different concrete slabs.

2. The stress zone bridge vibration control balustrade arm-extending damper of claim 1, wherein: two sides of each concrete slab are respectively provided with an extension arm, and a group of axial damping devices are connected between the extension arms on the same sides of two adjacent concrete slabs.

3. The stress zone bridge vibration control balustrade arm-extending damper of claim 2, wherein: the chain rod is connected to the upper end of the extension arm, and the axial damping device is arranged above the concrete slab in parallel.

4. The stress zone bridge vibration control balustrade arm-extending damper of claim 1, wherein: and shock pads are arranged in the intervals between two adjacent concrete plates.

5. The stress zone bridge vibration control balustrade arm-extending damper of claim 1, wherein: the concrete slab is fixedly arranged on the upper side of the suspension belt through bolts.

6. A stress-bridged vibration control rail arm extension damper as recited in any one of claims 1-5, wherein: the axial damping device is a viscous damper or a friction damper or a tuned mass damper.

7. A stress-bridged vibration control rail arm extension damper as recited in any one of claims 1-5, wherein: the sling is a steel rope or a steel plate or a carbon fiber plate.