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Assembled type current vortex tuned mass damper for pedestrian bridge and manufacturing method

A tuned mass damping and assembled technology, which is applied in the direction of erecting/assembling bridges, bridges, bridge parts, etc., can solve the problems of difficult frequency adjustment, inconvenient installation, poor durability, etc., and achieve improved energy consumption efficiency, simple assembly, and durability high effect

Active Publication Date: 2016-03-09
NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention aims at the problems of poor durability, inconvenient installation, and difficulty in frequency adjustment of the damping elements of the TMD used for vertical vibration reduction of pedestrian bridges in the prior art, and proposes an assembled eddy current tuned mass damper and assembly method for the bridge

Method used

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  • Assembled type current vortex tuned mass damper for pedestrian bridge and manufacturing method
  • Assembled type current vortex tuned mass damper for pedestrian bridge and manufacturing method
  • Assembled type current vortex tuned mass damper for pedestrian bridge and manufacturing method

Examples

Experimental program
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Effect test

Embodiment 1

[0080] Example 1: Combining Figure 1-Figure 13 , an assembled eddy current tuned mass damper for flyovers, including a lower base plate 1, a TMD main body 15 and a frequency modulation device, the TMD main body 15 is set on the guide shaft 11 fixed on the lower base plate 1, and the TMD main body 15 is set on the The helical compression spring 3 on the guide shaft 11 is supported, the limit plate 9 is installed on the top of the guide shaft 11, and at least two frequency modulation devices are arranged below the TMD main body 15, and the TMD main body 15 is stacked with five pieces from bottom to top. Steel plate a4, a piece of steel plate b5, a piece of steel plate c6, a piece of steel plate d8 and a piece of steel plate e9; the middle part of steel plate a4, steel plate b5 forms a rectangular steel plate chamber 22; Notch; L-shaped permanent magnet fixed plate 12 is equipped with permanent magnet 13, and permanent magnet 13 is positioned at steel plate cavity 22; Conductor ...

Embodiment 2

[0120] Example 2: Combining Figure 1-Figure 13 , the present invention comprises a lower base plate 1, a guide shaft 11 fastened on the lower base plate, a spring collar 2 passing through the guide shaft, a helical compression spring 3, steel plates a4 to e8 and a limit plate 9, and nuts for fixing the limit plate 10. The L-shaped permanent magnet fixed plate 12 limited in the steel plate cavity 22, the permanent magnet 13 fixed on the L-shaped permanent magnet fixed plate 12 with bolts, is fastened in the middle of the two L-shaped permanent magnet fixed plates 12 The conductor copper plate 14 of the bottom plate 1 and the attached frequency modulation device. In the whole device, the steel plates a4-e8 form the tuning mass of the TMD, the helical compression spring 3 provides the stiffness of the TMD, and the permanent magnet 13 and the conductor copper plate 14 together provide the damping of the TMD.

[0121] The hoisting machine on the base plate adopts a relatively sim...

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Abstract

The invention relates to the field of vibration control of a civil engineering structure, in particular to an assembled type current vortex tuned mass damper for a pedestrian bridge and a manufacturing method. A TMD rigidity element is formed by helical compression springs; TMD tuned mass blocks are connected in series through a plurality of steel plates, so that the maneuverability of the tuned mass damper which is artificially assembled is guaranteed; a TMD damping element is formed by a permanent magnet current vortex damper of which the magnetic circuit is optimized, is arranged in a tuned mass block steel plate chamber, and is compact in structure; the distances between permanent magnets fixed on a bottom plate and mass block steel plates are adjusted, so that the adjustment of TMD frequencies is realized. In addition, the integrated design of TMD is slender bar-shaped, the length of the TMD in the span direction of the pedestrian bridge is large, the lateral length of the TMD in the lateral width of the pedestrian bridge is small, and the TMD is conveniently mounted at railings of the pedestrian bridge, so that the influence of the TMD on the function and the appearance of the pedestrian bridge is reduced. The vertical current vortex damper TMD disclosed by the invention has the prominent characteristics of being compact in structure, easy in field assembly, good in durability, convenient to mount at the railings of the pedestrian bridge and the like, and the frequencies can be regulated continuously.

Description

technical field [0001] The invention relates to the field of vibration control of civil engineering structures, in particular to an eddy current tuned mass damper suitable for vertical vibration control of long-span pedestrian bridges and a manufacturing and installing method thereof. Background technique [0002] With the development of urbanization and three-dimensional transportation, more and more large-span pedestrian bridges are being built in my country. However, the existing design codes for pedestrian bridges in China stipulate that the vertical first-order frequency of pedestrian bridges must be greater than 3.0Hz. Single-span pedestrian bridges are difficult to do. In order to facilitate construction, simply supported steel box girder structures are often used for overpasses. However, on the one hand, the inherent damping of steel-structured pedestrian bridges is low; on the other hand, the natural frequency of the first-order vertical vibration of long-span pedes...

Claims

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Application Information

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IPC IPC(8): E01D19/00E01D21/00
CPCE01D19/00E01D21/00
Inventor 汪志昊张闯徐宙元陈银周佳贞郜辉许艳伟皇幼坤
Owner NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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