Vibrating barrier: a novel device for the passive control of structures under ground motion.
Vibrating barrier: a novel device for the passive control of structures under ground motion.
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DOI：
10.1098/rspa.2015.0075
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发表时间：
2015-07-08
期刊：
影响因子：
--
通讯作者：
Tombari A
中科院分区：
文献类型：
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作者：
Cacciola P;Tombari A
提出了一种新的装置，称为振动屏障（ViBa），旨在减少相邻结构在地震动波作用下的振动。ViBa是一种埋在土壤中的结构，与周围的建筑物分离，能够吸收地面运动产生的很大一部分动态能量。其工作原理是利用振动结构之间由于波在土壤中的传播而产生的动力相互作用，即结构-土-结构相互作用。新的控制策略的基本理论方面仔细审查连同它的数值模拟。本文还推导了在谐波激励情况下设计振动杆的封闭解。通过数值和实验分析，探讨了该装置在减轻地震动波对结构响应影响方面的有效性。实验结果表明，最大结构加速度显著降低87%。
A novel device, called vibrating barrier (ViBa), that aims to reduce the vibrations of adjacent structures subjected to ground motion waves is proposed. The ViBa is a structure buried in the soil and detached from surrounding buildings that is able to absorb a significant portion of the dynamic energy arising from the ground motion. The working principle exploits the dynamic interaction among vibrating structures due to the propagation of waves through the soil, namely the structure–soil–structure interaction. The underlying theoretical aspects of the novel control strategy are scrutinized along with its numerical modelling. Closed-form solutions are also derived to design the ViBa in the case of harmonic excitation. Numerical and experimental analyses are performed in order to investigate the efficiency of the device in mitigating the effects of ground motion waves on the structural response. A significant reduction in the maximum structural acceleration of 87% has been achieved experimentally.