Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Water body damping device and method for controlling vortex vibration and flutter of cross-sea and cross-river bridge

A damping device and water body technology, applied in bridges, bridge parts, bridge construction, etc., can solve the problems of inability to adjust in real time, the control effect needs to be observed and verified, and the complexity of the flow around the bridge section, so as to protect the bridge structure and suppress vibration. Effect

Active Publication Date: 2021-09-07
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
View PDF9 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Passive measures are to appropriately change the shape of the bridge or add some devices (such as deflectors, dampers, vortex screens, etc.) without changing the structure and function of the bridge, so as to obtain a bridge with good wind resistance However, due to the complexity of the flow around the bridge section, passive aerodynamic measures do not have the universality of eddy vibration control, and cannot be adjusted in real time according to the movement posture of the main girder and the change of the flow environment, and the control effect cannot reach the best state
In addition, there is a size effect in the scale model test in the wind tunnel test, so the control effect in the real environment needs to be observed and verified

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Water body damping device and method for controlling vortex vibration and flutter of cross-sea and cross-river bridge
  • Water body damping device and method for controlling vortex vibration and flutter of cross-sea and cross-river bridge
  • Water body damping device and method for controlling vortex vibration and flutter of cross-sea and cross-river bridge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] This embodiment provides a water body damping device for controlling eddy vibration and flutter of bridges across seas and rivers, such as Figure 1 to Figure 4 As shown, the water body damping device 1 is included, and the water body damping device 1 is connected with the anchor hole provided at the bottom of the main beam 3 through the steel cable 2 and immersed in water. The water body damping device 1 is arranged on both sides of the bridge, and is respectively arranged 1 / 2, 1 / 4, 1 / 8 of the length of the main beam 3. The water body damping device 1 includes a steel frame 11 and a water resistance cup 12. One end of the water resistance cup 12 is provided with a barrier ring 13 and a water resistance cup cover 14. The water resistance cup cover 14 is arranged on the water resistance cup 12 and the barrier ring. Between 13, and connected with the water resistance cup 12, the blocking ring 13 is used to prevent the water resistance cup cover 14 from being opened to the...

Embodiment 2

[0043] This embodiment provides a method for controlling eddy vibration and flutter of a cross-sea and river-crossing bridge. The method uses the above-mentioned water body damping device 1 as a tool, and includes the following steps:

[0044] S1: When eddy vibration and flutter occur in the bridge, connect the water body damping device 1 to the bottom of the main beam 3 through the steel cable 2, and put it into the water;

[0045] S2: The water body damping device 1 suppresses the eddy vibration and flutter of the bridge;

[0046] S3: After the vortex and flutter of the bridge disappear, the water body damping device 1 is removed and put away.

[0047] Step S2 specifically includes the following steps:

[0048] S21: When the main beam 3 moves upward, the water body damping device 1 moves upward under the action of tension, and the water flow makes the water resistance cup cover 14 close the bottom of the water resistance cup 12, increasing the resistance and damping of the ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a water body damping device and method for controlling vortex vibration and flutter of a cross-sea and cross-river bridge. The water body damping device comprises a water body damping device, and the water body damping device is connected to the lower portion of a main beam through a steel cable and immersed in water; the water body damping device comprises a steel frame and water resistance cups, one end of each water resistance cup is provided with a blocking ring and a water resistance cup cover, the water resistance cup cover is arranged between the water resistance cup and the blocking ring and movably connected with the water resistance cup, and the blocking ring is used for blocking the water resistance cup cover from being opened towards the outside of the water resistance cup; the multiple water resistance cups are arranged on the steel frame in the direction that the water resistance cup covers face downwards. The action force between the water resource under the bridge and the device is utilized to hinder the movement of the main beam, and the effect of restraining vortex vibration or soft flutter of the bridge is achieved. The control effect of controlling multi-order vortex vibration can be achieved by installing the water damping devices at different bridge span lengths. The underwater device is folded in daily bridge operation, and underwater navigation and the attractiveness of the bridge are not affected.

Description

technical field [0001] The invention relates to the technical field of vibration reduction control of building structures, in particular to a water body damping device and method for controlling eddy vibration and flutter vibration of bridges crossing seas and rivers. Background technique [0002] Long-span bridges are more sensitive to wind due to their large span and low structural soft damping. When the wind flows through the section of the main girder, the vortex shedding will occur on the downstream side of the main girder, and will generate alternating up and down forces on the bridge. As the wind speed increases, the frequency of vortex shedding also increases. When the shedding frequency is close to the natural frequency of the main girder, the vortex induced resonance phenomenon of the main girder structure will be caused. Although the vortex-induced vibration is a limited vibration and does not produce divergent vibration like flutter and galloping, the vortex-ind...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): E01D19/00
CPCE01D19/00E01D11/02E01D19/16E01D11/04E01D19/14
Inventor 韩艳李凯许育升许福友李春光胡朋
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products