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Bidirection adjustable tuning quality escillating damper

A technology of tuning mass and shock absorber, which is applied to bridge parts, bridges, building components, etc., can solve problems such as poor vibration reduction effect, TMD frequency imbalance, and aggravate the original structure response, so as to achieve obvious social benefits and reduce resonance problems , the effect of huge economic benefits

Inactive Publication Date: 2006-01-11
DALIAN UNIV OF TECH
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Problems solved by technology

[0004] However, the control effect of TMD on structural vibration has a great correlation with the frequency of the structure and TMD itself
When the frequency of the TMD is tuned to be consistent with the natural frequency of the structure, a good vibration reduction effect can be achieved; when the frequency of the TMD is inconsistent with the natural frequency of the structure, the vibration reduction effect is relatively poor, and even the response of the original structure will be aggravated
In actual engineering, the frequency of structural vibration often changes with changes in environmental conditions. For traditional TMD vibration damping devices, it is difficult to tune the frequency after installation, which will lead to TMD frequency imbalance.
When considering the impact of two-way vibration at the same time, the traditional one-way TMD can no longer meet the needs of vibration reduction

Method used

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  • Bidirection adjustable tuning quality escillating damper
  • Bidirection adjustable tuning quality escillating damper
  • Bidirection adjustable tuning quality escillating damper

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Embodiment Construction

[0013] The best implementation mode of the present invention will be described in detail below in combination with technical solutions and accompanying drawings.

[0014] The two-way adjustable TMD shock absorber proposed by the present invention is as figure 1 , figure 2 and image 3 shown. Each shock absorber consists of four springs vertically, two springs horizontally, a viscous oil damper vertically and horizontally, two vertical guide rods, horizontal guide rails and box structure, horizontal moving structure, and several steel plates . The shock absorber is installed on the top of the bottom plate of the box girder 12 of the bridge structure. The specific method is to pre-open bolt holes and guide rod perforations on the steel plate 3. Weld the upper end of the vertical spring 13 and the vertical viscous oil damper 1 on a steel plate 3, then weld the lower end of the vertical spring 13 and the vertical viscous oil damper 1 on the backing plate 11, and then place t...

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Abstract

The present invention relates to a shock absorption control equipment for large-span pedestrian overhead bridge, harbour landing stage and related structure, it can be used for reducing the resonance reaction of bridge structure under the action of pedestrian load and transverse wind load. It is characterized by that the bottom portion of mass-tuning shock damper is equipped with a transverse moving mechanism formed from box-type beam-slab, guidway and wheels, and also equipped with transverse spring and transverse viscous oil damper.

Description

technical field [0001] The invention belongs to the technical field of vibration reduction of civil engineering structures, and relates to the design of a two-way shock absorber composed of steel plates, guide rods, springs and viscous oil dampers for large-span pedestrian bridges, port trestles and related structures. Background technique [0002] With the development of urban construction, the roads become wider and wider. As a pedestrian bridge to ensure that pedestrians pass through the road quickly and safely, its span is also increasing. For this type of long-span pedestrian bridge, although the strength and stiffness are relatively easy to meet the design requirements, the frequencies of vertical and lateral vibrations are relatively low, usually only about 2 Hz. The statistical results show that the frequency of people walking is about 2 Hz. Therefore, when pedestrians pass through the bridge, it is easy to generate resonance in the vertical direction, causing panic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D19/00E04B1/98
Inventor 李宏男霍林生国巍
Owner DALIAN UNIV OF TECH
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