Speaker: Daniel Cox, CH2M-Hill Professor of Civil and Construction Engineering, Oregon State University
Topic: Community Islanding: Modeling Local and Regional Damage and Recovery of Roadway Networks after a Cascadia Subduction Zone Earthquake and Tsunami
A new method to evaluate the regional and local resilience of infrastructure networks following disruptions from natural hazards is presented. The regional resilience relates to the a community’s ability to access the larger (state-wide) network, and the local resilience relates to the connectivity within the boundaries of a community. This framework is applied to a road and highway transportation network disrupted by ground shaking and inundation under a Cascadia Subduction Zone earthquake and tsunami scenario. The regional network extents encompass the entire Oregon coast to the I5 corridor. Embedded within this regional network are 18 local networks associated with coastal communities. Regional and local connectivity indexes are defined to identify the initial damage and then track the post-disaster recovery of the transportation network. The study identifies attributes that lead to a regionally or locally resilient network and highlight the importance of considering local infrastructure networks embedded within larger regional networks. For example, we shown that without regional considerations, the time to recover may be severely underpredicted by conventional approaches. The methodology is further used to demonstrate how mitigation options impact the transportation network’s resilience. The importance of strategically considering mitigation options is emphasized as some communities see significant reductions in time to recover, whereas others see little to no improvement.
call +1-971-247-1195 US Meeting ID: 945 5573 1151
Thursday, October 27 at 3:30pm to 4:30pm
Hatfield Marine Science Center, Marine Studies Building Auditorium
2030 SE Marine Science Dr, Newport, OR 97365