School of Civil Engineering, Harbin Institute of Technology, Harbin, Heilongjiang Province, China.
School of Mechanical and Electrical Engineering, Harbin Engineering University, Harbin, Heilongjiang Province, China.
PLoS One. 2021 Mar 8;16(3):e0247677. doi: 10.1371/journal.pone.0247677. eCollection 2021.
Transient ground displacement (TGD) that is caused by earthquakes can damage underground pipes. This damage is especially critical for the joints, elbows and tees of the pipes which play an important role in the operation of a pipe network. In this study, a scale pipe network with both elbows and tees, as well as some components of the pipe network with only tees or elbows, has been investigated. The response of the nodes of a pipe network, when installed in non-uniform geology, was analyzed using the shaking table test and ABAQUS finite element simulation. This paper has firstly introduced the preparation of the test and the developed finite element model. Then the system response in terms of strain, the friction, the bending deformation, the node deformation amplification coefficient and the pipe-soil relative displacement along the pipe axis of the pipe network and two pipe network components have been analyzed explaining the correlation between these responses. Finally, the influence of elbows and tees on the pipe network was analyzed, and the conclusions that have been reached about how tees and elbows can change the response of a pipe network during an earthquake can provide theoretical support for the seismic design and layout of an underground pipe network.
地震引起的瞬时地面位移（TGD）会损坏地下管道。对于管道的接头、弯管和三通等起着管网运行重要作用的部分，这种损坏尤其关键。在这项研究中，研究了既有弯管又有三通的比例管网，以及仅有三通或弯管的部分管网组件。使用振动台试验和 ABAQUS 有限元模拟分析了安装在不均匀地质条件下的管网节点的响应。本文首先介绍了试验的准备工作和开发的有限元模型。然后，分析了管网和两个管网组件在应变、摩擦、弯曲变形、节点变形放大系数和沿管道轴向的管土相对位移方面的系统响应，解释了这些响应之间的相关性。最后，分析了弯管和三通对管网的影响，得出的关于三通和弯管如何在地震中改变管网响应的结论，可为地下管网的抗震设计和布局提供理论支持。
