Abstract
Pipeline is gradually served as a crucial transportation manner by the end of 21st century around the states. Polyethylene (PE) pipeline has been regarded as a new material pipe for its good performance of flexibility and ductility during their service life, which has been extensively used in engineering fields. Although a considerable amount of effort has been devoted to investigate their behaviours against external loads, few works had been brought into focus to discover its dynamic response subjected blast loading. In this paper, an entire finite PE pipeline model base on ANSYS/LSDYNA is established corresponding to full-field experimental works to study the dynamic response of the pipe under subsurface localized explosion and further evaluate the effectiveness of the numerical model. Subsequently, concrete energy-absorbed layer is added to consider its effects on the explosion resistance of the pipe, and parametric studies correlated to length-width ratios of the concrete slabs are performed to analyse its sensitivity to the explosion resistance of buried PE pipeline.
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