Vibration control of a cluster of buildings through the Vibrating Barrier
Vibration control of a cluster of buildings through the Vibrating Barrier
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DOI：
10.1016/j.ymssp.2017.08.034
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发表时间：
2018-02-15
影响因子：
8.4
通讯作者：
Cacciola, P.
中科院分区：
文献类型：
--
作者：
Tombari, A.;Espinosa, M. Garcia;Cacciola, P.
最近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作用下的振动。Viba是一种埋在土壤中的结构，它与周围的建筑分离，能够吸收地面运动产生的很大一部分动力能量。其工作原理是利用振动结构之间由于波在土中传播而产生的动力相互作用，即结构-土-结构相互作用。本文研究了VIBA对建筑物群振动的控制效果。为此，建立了包括多个建筑物和振子的结构-场地相互作用的离散模型，通过线弹性弹簧考虑了土对结构的影响，即土-结构相互作用(SSI)、结构-土-结构相互作用(SSSI)以及振子-土-结构相互作用。通过对离散模型的分析，给出了简谐激励下振动台设计的闭合解。进行了高级有限元数值模拟，以评估VIBA在保护不止一栋建筑方面的效率。还进行了参数研究，以确定使用拟议的振动控制策略来保护建筑群的有利和不利影响。最后，对由VIBA装置保护的两栋建筑物的原型进行了振动台试验，以验证所提出的数值模型。(C)2017爱思唯尔有限公司。保留所有权利。
A novel device, called Vibrating Barrier (ViBa), that aims to reduce the vibrations of adjacent structures subjected to ground motion waves has been recently 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. In this paper the efficiency of the ViBa is investigated to control the vibrations of a cluster of buildings. To this aim, a discrete model of structures-site interaction involving multiple buildings and the ViBa is developed where the effects of the soil on the structures, i.e. the soil-structure interaction (SSI), the structure-soil-structure interaction (SSSI) as well as the ViBa-soil-structures interaction are taken into account by means of linear elastic springs. Closed-form solutions are derived to design the ViBa in the case of harmonic excitation from the analysis of the discrete model. Advanced finite element numerical simulations are performed in order to assess the efficiency of the ViBa for protecting more than a single building. Parametric studies are also conducted to identify beneficial adverse effects in the use of the proposed vibration control strategy to protect cluster of buildings. Finally, experimental shake table tests are performed to a prototype of a cluster of two buildings protected by the ViBa device for validating the proposed numerical models. (C) 2017 Elsevier Ltd. All rights reserved.