Region-Specific Probabilistic Liquefaction Hazard Analysis: Overview of the Liquefaction Pilot Study Being Performed in the Netherlands Due to Induced Seismicity
Professor Russell A. Green, PhD, PE
Charles E. Via, Jr., Department of Civil and Environmental Engineering, Virginia Tech, Blacksburg, VA
The Groningen gas field in the Netherlands is one of the largest in the world and has produced over 2000 billion m3 of natural gas since the start of production in 1963. The first earthquakes linked to the gas production in the Groningen field occurred in 1991, with the largest event to date being an ML3.6. In response to concerns about the induced earthquakes, the field operator is leading an effort to quantify the seismic hazard and risk resulting from the gas production operations, to include the assessment of the liquefaction hazard. However, due to the unique characteristics of both the seismic hazard and the geologic profiles/soil deposits in Groningen, direct application of existing liquefaction evaluation procedures was deemed inappropriate. Accordingly, efforts were first focused on developing Groningen-specific relationships for evaluating liquefaction potential of the region. The probabilistic liquefaction hazard is being calculated using a Monte Carlo method, wherein for each event scenario, the Groningen-specific relationships are being used to compute the factor of safety (FS) against liquefaction as a function of depth and corresponding Ishihara Inspired Liquefaction Potential Index (LPIish) hazard curves are being computed. The results from this study are forming the basis on which decisions will be made regarding the need for implementing mitigation measures. The overall approach being used in this pilot study can be adopted to assess the probabilistic liquefaction hazard worldwide.
Speaker Biography: Dr. Russell Green is a Professor of Civil Engineering at Virginia Tech, Blacksburg, VA, in the Geotechnical Engineering Program area. He was previously on the faculty at the University of Michigan and held visiting faculty positions at Chuo University, Tokyo, Japan and the University of Canterbury, Christchurch, New Zealand. The primary focus of Russells research is in the areas of engineering seismology, geotechnical earthquake engineering, and soil and site improvement. He has participated in post-earthquake investigations in the US, Iceland, Haiti, Japan, and New Zealand. Russell received his bachelors degree in civil engineering from Rensselaer Polytechnic Institute in 1992, his masters degree from the University of Illinois at Urbana-Champaign in 1994, and his PhD in 2001 from Virginia Tech. Russell is a registered professional engineer in Virginia and a veteran of the United States Marine Corps. Also, Russell is the recipient of the 2016 ASCE Norman Medal, among other awards for research and teaching.
Event Information:
430 Planning Meeting (anyone can attend)
530 Social Hour
630 Dinner
715 Announcements
730 Presentation
830 Adjourn
Registration:
Regular Registration ends at noon the Friday before the event.
Late Registration ends at the event start.
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200 Taylor Avenue North
Seattle, WA 98109
United States
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