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Swing type lever mass damper capable of controlling spatial vibration of stay cable

A technology of stay cable space and mass damper, applied in bridge parts, bridges, buildings, etc., can solve the problems affecting the safety and normal use of bridge structures, and achieve the effect of good in-plane vibration reduction effect.

Pending Publication Date: 2018-01-12
CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If this problem cannot be solved well, the stay cables will show vibration problems mainly out-of-plane vibration after the damper is installed, which will also affect the safety and normal use of the bridge structure

Method used

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  • Swing type lever mass damper capable of controlling spatial vibration of stay cable
  • Swing type lever mass damper capable of controlling spatial vibration of stay cable

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Embodiment Construction

[0019] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0020] see figure 1 and figure 2 As shown, the embodiment of the present invention provides a pendulum connecting rod mass damper for controlling the spatial vibration of the stay cable, which includes:

[0021] The first connecting rod 1, one end of the first connecting rod 1 is provided with a connecting portion for connecting with the stay cable 3, and the other end is provided with a damper 12, the middle part of the first connecting rod 1 is rotatably connected to the first rotating shaft 11, and the damper 12 is It is arranged to generate a damping force when the first connecting rod 1 rotates around the first rotating shaft 11; the damper 12 is a viscous shear damper, supported on the bridge deck 4 so as to be movable along the transverse bridge direction. The first rotating shaft 11 is located at two-thirds of the height of the firs...

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Abstract

The invention relates to the technical field of bridge vibration control, in particular to a swing type lever mass damper capable of controlling spatial vibration of a stay cable. One end of a first connecting rod is provided with a connecting part used for being connected with the stay cable, the other end of the first connecting rod is provided with a damper body, a first rotary shaft is rotatably connected with the middle of the first connecting rod, and the damper body is arranged to generate damping force when the first connecting rod rotates around the first rotary shaft; and one end ofa second connecting rod is rotatably connected with the first rotary shaft, a second rotary shaft is rotatably connected with the other end of the second connecting rod, the second rotary shaft is fixedly connected with a supporting seat, and the supporting seat is used for being fixed to a bridge floor. According to the swing type lever mass damper capable of controlling spatial vibration of thestay cable, when in-plane vibration is conducted on the stay cable, vibration of the stay cable drives the second connecting rod to rotate through the first connecting rod, the connecting part of thefirst connecting rod and the stay cable are rotatably connected with each other, the amplitude of rotation of the second connecting rod driven by the first connecting rod is larger, and therefore a better in-plane vibration damping effect is achieved.

Description

technical field [0001] The invention relates to the technical field of bridge vibration control, in particular to a pendulum lever mass damper for controlling space vibration of stay cables. Background technique [0002] The vibration problem of cable-stayed cables is one of the main problems in the structural safety of long-span cable-stayed bridges. After research, it is found that: since the initial damping ratio of cable-stayed cables is very small, increasing the damping ratio of cable-stayed cables through additional damping devices can effectively Controls all common forms of stay cable vibration. The main vibration forms of stay cables are various wind-induced vibrations. Generally, the vibration form of the stay cable in the vertical projection plane is called in-plane vibration, and the vibration form perpendicular to the projection plane is called out-of-plane vibration. Since the vibration direction of the stay cable is perpendicular to the direction of the inco...

Claims

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Application Information

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IPC IPC(8): E01D19/16
Inventor 刘斌汪正兴文望青王波刘振标柴小鹏瞿国钊夏正春印涛
Owner CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP
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