Mitigation of Pedestrian-induced Vibrations in Suspension Footbridges via Multiple Tuned Mass Dampers
Mitigation of Pedestrian-induced Vibrations in Suspension Footbridges via Multiple Tuned Mass Dampers
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DOI：
10.1177/1077546309350188
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发表时间：
2010-04
影响因子：
2.8
通讯作者：
N. Carpineto;W. Lacarbonara;F. Vestroni
中科院分区：
文献类型：
--
作者：
N. Carpineto;W. Lacarbonara;F. Vestroni
研究了人行悬索桥在地震激励下的动力响应及其多重调谐质量阻尼器（TMD）的被动减震作用。首先，假设悬索桥的有限平面运动，得到非线性运动方程。一个合适的近似版本的运动方程被证明是与现有的理论和线性化，然后在结构动力学分析。一个伽辽金离散化被用来计算自由和强迫的动态响应对振动控制系统的设计。首先，概述了桥梁动力响应的主要特征。由行人通过引起的共振被证明是有效地减少使用粘弹性TMD。由于悬索行人天桥的最低两种模式的频率在接近渡越现象时可能非常接近，因此考虑了三种不同的设计方案：渡越下方、渡越附近和渡越上方。特别是，这些情况下的被动控制架构的影响进行了研究。
The dynamic response of suspension footbridges to pedestrian-induced excitations and its passive mitigation, via multiple tuned mass dampers (TMDs), are investigated. First, the nonlinear equations of motion are obtained assuming finite planar motions of the suspension bridge. A suitable approximate version of the equations of motion is shown to be in agreement with existing theories and its linearization is then employed in the structural dynamics analyses. A Galerkin discretization is exploited to calculate both the free and forced dynamic response towards the design of the vibration control system. First, the leading characteristics of the bridge dynamic response are outlined. Resonant vibrations induced by the passage of pedestrians are shown to be effectively reduced using viscoelastic TMDs. As the frequencies of the lowest two modes in suspension footbridges can be very close in the proximity of the crossover phenomenon, three different design scenarios are considered: below, near and above the crossover. In particular, the influence of these scenarios on the passive control architecture is investigated.