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首页> 外文期刊>Soil Dynamics and Earthquake Engineering >Soil-buried wave barriers for vibration control of structures subjected to vertically incident shear waves
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Soil-buried wave barriers for vibration control of structures subjected to vertically incident shear waves

机译：用于垂直入射剪切波的结构振动控制的土壤埋藏波屏障

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摘要

Traditionally, the effects of seismic forces on structures have been mitigated by installing supplemental energy dissipation systems. In this paper, a new approach is explored for the mitigation of earthquake-induced vibrations by obstructing the entrance of seismic energy to the structure through the insertion of some concrete wave barriers within the soil domain. To do so, genetic algorithm (GA) based adaptive optimization methodology is utilized that is capable of finding the efficient layout of the concrete barriers in a manipulated soil zone around the structure. The optimization methodology is coupled with finite element (FE) method for analyzing the complex wave propagation phenomenon in the medium. To investigate the effect of frequency, three single degree-of-freedom (SDOF) structures with the natural frequencies of 1, 2, and 3 Hz are subjected to the time history ground motions with the predominant frequencies up to 8 Hz. The optimization analyses are performed in the frequency domain, and the efficiency of the obtained solutions is examined by applying time history ground motions in the time domain. The results show that the performance of the buried wave barriers is a complex function of the wave barriers layout, natural frequency of the structure, and the frequency content of the loading. It is observed that some optimal layouts of limited volume can attenuate the elastic demands of the structures to the extent of 30-80%.
机译：传统上，通过安装补充能量耗散系统，减轻了地震力对结构的影响。在本文中，通过在土壤结构域内插入一些混凝土波屏障来阻碍地震能量的入口来减轻地震诱导的振动来减轻地震诱导的振动的新方法。为此，利用基于遗传算法（GA）基于的自适应优化方法，其能够在结构周围找到操纵的土壤区域中的混凝土屏障的有效布局。优化方法与有限元（Fe）方法耦合，用于分析培养基中的复杂波传播现象。为了探讨频率的影响，具有1,2和3Hz的自由度的三种自由度（SDOF）结构具有时间历史地面运动，其主要频率高达8 Hz。优化分析在频域中进行，通过在时域中应用时间历史地面运动来检查所获得的解决方案的效率。结果表明，掩埋波屏障的性能是波屏障布局，结构的自然频率和负载的频率内容的复杂功能。观察到有限体积的一些最佳布局可以减轻结构的弹性需求，以30-80％的程度。

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