Reduced-scale ultrasonic modelling of Rayleigh wave transmission over seismic barriers formed by periodic arrays of vertical holes
Reduced-scale ultrasonic modelling of Rayleigh wave transmission over seismic barriers formed by periodic arrays of vertical holes
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DOI：
10.3397/1/37664
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发表时间：
2016
影响因子：
0.4
通讯作者：
A. Ouahabi;V. Krylov
中科院分区：
文献类型：
--
作者：
A. Ouahabi;V. Krylov
地震屏障被广泛用于保护建筑物免受交通引起的地面振动，主要是传播的瑞利表面波。在交通引起的地面振动的典型频率（即，10-100 Hz）下对真实的尺寸的地震屏障进行实验研究是昂贵且耗时的。在目前的工作中，提出了一种替代和更便宜的方法-一个缩小规模的实验建模，使用超声波瑞利波传播的非常小的规模的副本的真实的地震屏障。本文对中心频率为1 MHz的瑞利波脉冲在铝试件上垂直孔周期排列形成的地震屏障中的传播进行了实验研究。对不同类型的阵列和不同入射角的瑞利波的透射和反射系数进行了测量，并与早先发表的真实的地震屏障的结果进行了比较。
Seismic barriers are used widely to protect buildings from traffic-induced ground vibrations, mainly from propagating Rayleigh surface waves. Experimental investigations of real size seismic barriers at frequencies typical for traffic-induced ground vibrations, i.e. at 10-100 Hz, are costly and time consuming. In the present work, an alternative and much less expensive approach is proposed - a reduced-scale experimental modelling using ultrasonic Rayleigh wave propagation over very small-scale replicas of real seismic barriers. Experimental investigations of propagation of Rayleigh wave pulses with the central frequency of 1 MHz have been carried out for seismic barriers formed by periodic arrays of vertical holes in Aluminium samples. Measurements of transmission and reflection coefficients of Rayleigh waves for different types of arrays and for different incident angles have been carried out and compared with the earlier published results obtained for real seismic barriers.