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Oriented vertical adjustable tuning mass bumper

A tuning quality and adjustable technology, which is applied to bridge parts, bridges, building components, etc., can solve the problems of difficult frequency tuning, TMD frequency imbalance, and aggravate the original structure reaction, so as to achieve huge economic and social benefits and reduce resonance Problems, the effect of ensuring safety

Inactive Publication Date: 2005-05-11
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.

Method used

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  • Oriented vertical adjustable tuning mass bumper
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Embodiment Construction

[0011] The best implementation mode of the present invention will be described in detail below in combination with technical solutions and accompanying drawings.

[0012] The directional vertically adjustable TMD shock absorber proposed by the present invention is as follows: figure 1 and figure 2 shown. Each shock absorber consists of four springs, a viscous oil damper, two guide rods and several steel plates. The shock absorber is installed on the box girder floor 7 of the bridge structure. The specific method is to pre-offer bolt holes and guide rod perforations on all steel plates 3 . The upper ends of the spring 2 and the damper 6 are welded on a steel plate 3, then the lower ends of the spring 2 and the damper 6 are welded on the backing plate 1, and then the backing plate 1 is welded on the steel box girder floor 7 of the bridge structure. Similarly, two guide rods 5 are vertically passed through the reserved guide rod holes of the steel plate 3, and the lower ends...

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Abstract

A vibration-damping control unit for the pedestrian bridge over street, landing bridge of port and other similar structures in order to reduce the resonance caused by load features that mass block is made up of the steel plates through stacking them together and fixing by screw bolts, and two vertical guide rods are arranged at both sides of viscose oil damper for preventing its lateral swinging. Said mass block is regulatable.

Description

technical field [0001] The invention belongs to the technical field of vibration reduction of civil engineering structures, and relates to the design of shock absorbers 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 frequency of vertical vibration is 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 among pedestrians and ev...

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
Owner DALIAN UNIV OF TECH
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