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Dynamic response of utility tunnel during the passage of Rayleigh waves

机译:瑞利波通过期间公用隧道的动力响应

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Abstract The modeling methodologies and calculation of dynamic response of underground structure under Rayleigh waves is investigated in this paper. First the free field responses under Rayleigh waves are analyzed and the numerical results agree well with the theoretical results. Then, the approximate Rayleigh waves are put forward based on the preliminary research, and Rayleigh wave field is obtained through fast Fourier transform technique. Taking a utility tunnel as an example, its dynamic responses under Rayleigh waves is calculated by ABAQUS. The results demonstrate that bending deformation is the main component of structural deformation and the deformation at the top of the structure is about twice as much as that at bottom of the structure. The effect of soil-structure interface and the buried depth of underground structure are also investigated via parameter analysis. For the shallow buried underground structures, Rayleigh waves can be the key factor to control the responses and damage of the structure.
机译:摘要研究了瑞利波作用下地下结构动力响应的建模方法和计算方法。首先分析了瑞利波下的自由场响应,数值结果与理论结果吻合良好。然后,在初步研究的基础上提出了近似的瑞利波,并通过快速傅立叶变换技术获得了瑞利波场。以公用事业隧道为例,利用ABAQUS计算其在瑞利波作用下的动力响应。结果表明,弯曲变形是结构变形的主要组成部分,结构顶部的变形大约是结构底部变形的两倍。通过参数分析,研究了土-结构界面的影响和地下结构的埋深。对于浅埋地下结构,瑞利波可能是控制结构响应和破坏的关键因素。

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