Investigating Seismic Resilience Improvement of Water Mains Using CIPP Lining
This presentation discusses the seismic vulnerability of aging cast iron (CI) water mains in North America and examines how cured-in-place pipe (CIPP) rehabilitation can reduce earthquake-induced damage and improve system performance. CI pipelines have historically experienced widespread failures during seismic events, yet the seismic benefits of CIPP lining have not been clearly quantified for infrastructure planning and investment decisions.
This study discusses the development of seismic fragility relations for CI pipelines with and without CIPP rehabilitation to quantify expected damage under varying levels of ground deformation. These fragility relations are then used to evaluate the seismic resilience of a water distribution network in Charleston, South Carolina, across a large number of earthquake scenarios. The presentation discusses the effect of CIPP rehabilitation on expected pipeline damage at the network level and illustrates how targeted CIPP lining can improve post-earthquake connectivity and overall system resilience.
GHG Emissions in Canadian Underground Infrastructure: Methods, Standards, and Modelling Framework
Underground infrastructure systems such as water supply, wastewater and stormwater networks, energy distribution and pipelines, telecommunications and power infrastructure, and underground transportation systems are essential to modern society, yet their greenhouse gas emissions over the life cycle are still not well understood. Estimating these emissions requires more than applying generic Life Cycle Assessment procedures. It requires careful definition of infrastructure systems, identification of the components and activities that dominate emissions, and the development of structured asset inventories and modelling approaches that can support engineering decisions and long term planning.
This webinar presents a methodological framework for assessing and analysing greenhouse gas emissions in underground infrastructure in Canada, placing it within the context of international standards and guidance, including ISO 14040 and 14044, ISO 21931-2, EN 15978, RICS, ASTM practices, the ASCE prestandard, and PAS 2080. The presentation explains how these frameworks inform a research workflow that integrates system decomposition, life cycle assessment, comparative analysis, and scenario modelling, and discusses the practical challenges of applying these methods to real infrastructure systems.
