Effects of Earthquake-Induced Liquefaction on Bridge Foundations and Transportation Network Using CDSS

Arash Khosravifar, PSU-CEE

Summary:

A magnitude 9.0 earthquake by the Cascadia Subduction Zone (CSZ) is believed to be capable of causing widespread soil liquefaction in the Pacific Northwest (PACNW). Affected infrastructures include highway bridges specifically the ones crossing the Columbia and Willamette rivers and along the I-5 corridor. The need to study the effects of soil liquefaction in the PACNW has been raised by a group of experts in liquefaction and stakeholders from involved states (DOGAMI/OSU 2013). 

To fulfill this need, we plan to perform laboratory tests using cyclic direct simple shear device (cyclic DSS). The cyclic DSS is an advanced geotechnical equipment that was recently purchased by the CEE Department. Local agencies and consulting firms (ODOT, City of Portland, Port of Portland, GRI, Hart Crowser, and CH2M) have agreed to collaborate with us by providing soil samples from their ongoing projects. This collaboration is beneficial for both us and these agencies considering the broader impacts of the potential research findings on the seismic assessment of bridges in the Willamette Valley.

Impacts:

9/30/2019: The results will be used to better appropriate funds to make safer transportation network in earthquakes, specifically against the expected Magnitude 9 Cascadia Subduction Zone earthquake. Additionally, using the NITC diversity funds to hire female students has significantly helped us increase diversity in our graduate program which will inevitably influence the future workforce. 

Project Details

Project Type:
Research
Project Status:
In Progress
End Date:
September 15,2019
UTC Grant Cycle:
Diversity Grant
UTC Funding:
$7,500

Downloadable Products

Other Products

  • Characterization of the liquefaction potential of silt soils of the Willamette Valley (PRESENTATION)