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首页> 外文期刊>Bulletin of the Seismological Society of America >Seismic Muffler Protection of Critical Infrastructure from Earthquakes
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Seismic Muffler Protection of Critical Infrastructure from Earthquakes

机译：地震消声器免受地震关键基础设施的保护

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Each year, large ground motions from earthquakes cause infrastructure damage and losses worldwide. Moreover, thousands of earthquake-related deaths occur annually that are caused by collapsing buildings and structures. Although earthquake engineering technologies evolved over many years to attenuate the effects of destructive seismic waves, significant damage and fatalities still occur. Here we present a novel concept that redirects and attenuates hazardous seismic waves by implementing an engineered seismic muffler. The muffler design is inspired from that of an acoustic muffler that dissipates elastic wave energy in a fluid. The seismic muffler uses a vertically oriented subsurface V-shaped structure constructed in geological media. This structure uses sloping-opposing boreholes or trenches to form the muffler walls and is designed to reflect and divert direct surface waves as a barrier while dissipating body and converted waves that travel from depth vertically upward into the muffler duct. Analytical and computational seismic wave propagation simulations suggest a seismic muffler can effectively reduce ground motion and scatter broadband seismic waves at the ground surface directly above the muffler (i.e., the designated protection region). Simulations are compared for validation with experimental data obtained from bench-scale blocks containing machined borehole arrays and trenches and are then scaled to an earth-sized model. Findings suggest the effects of a devastating seismic energy magnitude 7.0 M-e earthquake can be reduced to less damaging magnitudes, 4.5 M-e (summed surface wave), and 5.7 M-e (summed surface wave and muffler leakage). Results show seismic muffler structures significantly reduce the impact of the peak ground velocity of the surface wave, but seismic transmission through the muffler base at depth has marginal effects.
机译：每年，地震的大地运动导致全球基础设施损坏和损失。此外，每年发生成千上万的地震相关死亡，这是由折叠建筑物和结构引起的。虽然抗震工程技术在多年来演变时，但仍然发生破坏性地震波的影响，仍然发生重大损害和死亡。在这里，我们提出了一种通过实施工程化地震消声器来重定向和衰减危险地震波的新颖概念。消声器设计受到声学消声器的启发，可以在流体中消散弹性波能量。地震消声器使用在地质介质中构造的垂直定向的地下V形结构。该结构使用倾斜相对的钻孔或沟槽来形成消声器壁，并且设计成将直接表面波作为屏障反射并转移，同时散发主体和转换从深度向上行进到消声管中的波浪。分析和计算地震波传播模拟表明地震消声器可以有效地将地面上的地面运动和散射宽带地震波直接在消声器（即指定的保护区）上方直接降低。将模拟与验证的验证进行了比较，实验数据从包含加工的钻孔阵列和沟槽的替补块获得，然后将其缩放到地形模型。调查结果表明，毁灭地震能量幅度7.0 m-e地震的影响可以减少到较少的损坏幅度，4.5 m-e（总结表面波）和5.7 m-E（总结表面波和消声器泄漏）。结果显示地震消声器结构显着降低了表面波峰值接地速度的影响，但通过消声器底座的地震传递深度具有边缘效应。

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