Distributed fibre optic sensing of strains on buried full-scale PVC pipelines crossing a normal fault
Distributed fibre optic sensing of strains on buried full-scale PVC pipelines crossing a normal fault
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DOI：
10.1680/jgeot.16.p.161
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发表时间：
2018
期刊：
影响因子：
5.8
通讯作者：
P. Ni;I. Moore;W. A. Take
中科院分区：
文献类型：
--
作者：
P. Ni;I. Moore;W. A. Take
地震断层是非常有害的埋地管道，由于弯曲力矩和轴向力所产生的土壤-管道的相互作用。管道对地面破裂的响应通常用弹簧梁分析法来计算。然而，用于定义弹簧响应的经验数据是针对具有高弯曲刚度的钢管获得的，并且所得弹簧刚度值对于柔性管的有效性是值得怀疑的。本文介绍了使用一种新的分裂盒装置进行的全尺寸试验，该装置允许在倾角为90°的正断层的干砂中对管道进行试验。四个聚氯乙烯（PVC）管（不同直径），一个装有应变片和三个装有光纤传感器，进行了测试，以提供实验证据的柔性管。该研究包括确认光纤应变测量的有效性，其优点是提供更多的数据比有限的离散值从…
Seismic faulting is extremely detrimental to buried pipelines owing to bending moments and axial forces generated by the soil–pipe interaction. Pipe responses to ground rupture are usually evaluated by beam-on-spring analysis. However, the empirical data used to define the spring response were obtained for steel pipes with high flexural stiffness and the effectiveness of the resulting spring stiffness values for flexible pipes is questionable. This paper presents full-scale tests undertaken using a new split-box apparatus which permits the testing of pipes in dry sand subject to a normal fault with dip angle of 90°. Four polyvinyl chloride (PVC) pipes (various diameters), one instrumented with strain gauges and three instrumented with fibre optic sensors, were tested to provide experimental evidence for flexible pipes. The research includes confirmation of the effectiveness of fibre optic strain measurement, which has the advantage of providing much more data than the limited discrete values obtained from...