Data-Driven Assessment of Post-Earthquake Bridge Functionality and Regional Mobility

PI: Chris Motter (WSU),, ORCID: 0000-0003-0418-3791

Co PIs: Adam Phillips (WSU), Marc Eberhard (UW), Jeffrey Berman (UW), and Brett Maurer (UW)

AMOUNT & MATCH: $180,000 from PacTrans; $180,000 Match

PERFORMANCE PERIOD: 8/16/2020 – 8/15/2022

STATUS: Active

CATEGORIES: Earthquake, Natural Disaster, Bridges, Structures



FINAL PROJECT REPORT: will be available once completed

PROJECT DATA: will be available once completed

DESCRIPTION: Improved estimates of post-earthquake bridge vulnerability and lifeline mobility are complex, because: (1) western Oregon and Washington have more than 10,000 bridges that could be damaged; (2) these bridges are located on a wide range of site conditions; and (3) ground motions have never been recorded for an M9 earthquake in the Pacific Northwest (PNW). An overview of the research approach, including seven work tasks, as well as the databases that will be used to complete each task, is provided in the figure. Key outputs from this project will be (1) a database of bridge performance metrics for 100,000 simulated cases of bridge and intensity measure; (2) improved bridge fragility relationships for PNW retrofitted and non-retrofitted bridges; (3) a model for predicting subsurface Vs-depth profiles in the PNW; (4) assessment of post-earthquake functionality of approximately 10,000 PNW bridges following an M9 CSZ earthquake; and (5) regional assessment of network mobility, wherein the likelihood of post-event route serviceability is quantified probabilistically. The Item (5) output will be in the form of maps that show probabilistic bridge functionality and re-opening times following CSZ earthquakes. These maps will enable WSDOT and ODOT to make informed decisions on post-earthquake emergency planning routes.

Research Project Progress Report #1 4/10/2021
Research Project Progress Report #2 10/10/2021
Research Project Progress Report #3 4/10/2022
Draft Report 6/15/2022
Final Project Report 8/15/2022