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Experimental Study on Seismic Dynamic Characteristics of Shallow-Bias Tunnel with a Small Space

机译:小空间浅偏压隧道地震动力特性试验研究

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In order to obtain the seismic dynamic characteristics of a shallow-bias tunnel with a small space, a series of large-scale shaking table model tests were carried out. The key technology of the test is introduced in detail, for example, similar ratios of model, test equipment, testing model box, testing model, sensor arrangement, seismic waves, and testing system. The results show that the first predominant frequency is similar between measuring points. However, the second predominant frequency is highly different between measuring points. The first and second predominant frequencies gradually decrease with the increasing of input PGA. The rock stratum can shield seismic wave in the high frequency band. The research results provide reference for similar tunnels.
机译:为了获得小空间浅偏压隧道的地震动力特性,进行了一系列的大型振动台模型试验。详细介绍了测试的关键技术,例如相似比例的模型,测试设备,测试模型箱,测试模型,传感器布置,地震波和测试系统。结果表明,测量点之间的第一主导频率相似。但是,第二主要频率在测量点之间存在很大差异。随着输入PGA的增加,第一和第二主要频率逐渐降低。岩层可以屏蔽高频带的地震波。研究结果可为类似隧道提供参考。

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