Seismic assessment of high-density polyethylene (HDPE) lift stations

提升站是一种地下设施，将住宅或商业来源的废水输送到废水处理厂。 根据加拿大国家建筑规范，电梯站被定义为灾后结构，要求在地震后立即保持运行。 大量的历史震后勘察证据证实了高密度聚乙烯（HDPE）管道在地震作用下的优异性能。 然而，高密度聚乙烯电梯站的应用是相对较新的，和高密度聚乙烯电梯站的抗震性能仍然知之甚少。 该项目旨在通过对电梯站在地震荷载作用下的二维和三维数值模拟来解决这些研究空白。 这项研究的成果将为加拿大废水基础设施的抗震能力带来实实在在的好处，并为应急响应规划提供科学知识。

Lift stations are an underground utility transporting wastewater from residential or commercial sources to wastewater treatment plants. Lift stations are defined as a post-disaster structure according to national building code of Canada, which are required to remain operational immediately after earthquakes. A wealth of evidence from historical post-earthquake reconnaissance has confirmed the excellent performance of high-density polyethylene (HDPE) pipelines under earthquakes. However, the application of HDPE to lift stations is relatively new, and the seismic performance of HDPE lift stations remains poorly understood. This project aims to address these research gaps through two-dimensional and three-dimensional numerical simulations of lift stations subjected to seismic loading. The outcomes of this research will bring tangible benefits to the seismic resilience of wastewater infrastructure in Canada and contribute the scientific knowledge on emergency response planning.