颗粒阻尼器对长周期桥梁结构的减震控制效果研究

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振动与冲击 ›› 2018, Vol. 37 ›› Issue (10) : 1-7.

论文

罗振源1,闫维明1,许维炳1,周大兴2

作者信息 +

Seismic control of longperiod bridge structures using particle dampers

LUO Zhenyuan1, YAN Weiming1,XU Wweibing1, ZHOU Daxing2

Author information +

文章历史 +

摘要

为了研究颗粒阻尼器在长周期桥梁结构中的减震控制效果及其减震机理，以某典型的非对称独塔自锚式悬索桥为原型，设计制作了该桥的1:20缩尺模型，并设计制作了可用于试验模型的多层隔舱式颗粒阻尼器，对设置颗粒阻尼器前后的模型桥进行地震模拟振动台阵试验。试验结果表明：所提出的多层隔舱式颗粒阻尼器在试验中未出现颗粒堆积现象，其对缩尺模型桥主梁的纵向地震响应具有良好的减震效果，能较大幅度降低主梁位移峰值响应和加速度均方根响应；该型阻尼器能显著增加主梁纵向振动（低频振动方向）的等效阻尼比，且对其纵向振动基频具有较显著的调谐作用；多层隔舱颗粒阻尼器能有效控制长周期桥梁的低频动力响应，可应用于长周期工程结构的减震控制中。

Abstract

In order to study the efficiency and mechanism of the vibration control of particle dampers in longperiod bridge structures, a 1/20scale bridge model was designed according to a typical asymmetric selfanchored suspension bridge with a singletower, and a multilayer compartmentalparticle damper applied to the scaled test model was proposed. Corresponding shaking table tests of the scaled model with and without particle dampers were conducted. The experimental results show that the multilayer particle damper proposed does not show the phenomenon of particle accumulation in the experiments, and it has a good damping effect on the longitudinal seismic responses of the main beam of the scaled model bridge. It can dramatically reduce the displacement responses and acceleration root mean square responses of the main beam. This type of damper can significantly increase the equivalent damping ratio to reduce the longitudinal vibration of the main beam (in the low frequency vibration direction), and its has a significant tuning effect on the fundamental longitudinal vibration frequency of the main beam; The multilayer compartmental particle damper can effectively control the lowfrequency dynamic responses of longperiod bridges and can be applied to the seismic control of longperiod engineering structures.

导出引用

罗振源1,闫维明1,许维炳1,周大兴2. 颗粒阻尼器对长周期桥梁结构的减震控制效果研究[J]. 振动与冲击, 2018, 37(10): 1-7

LUO Zhenyuan1, YAN Weiming1,XU Wweibing1, ZHOU Daxing2. Seismic control of longperiod bridge structures using particle dampers[J]. Journal of Vibration and Shock, 2018, 37(10): 1-7

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