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Recent Enhancements and Research Highlights at the NEES@UCSB Permanently Instrumented Field Sites

Recent Enhancements and Research Highlights at the NEES@UCSB Permanently Instrumented Field Sites Jamison H. Steidl. What is NEES@UCSB ?. Multi-Disciplinary Earthquake Engineering Field Site for Earthquake Monitoring and Active Experiments Steidl – Earth Science, Engineering Seismology

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Recent Enhancements and Research Highlights at the NEES@UCSB Permanently Instrumented Field Sites

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  1. Recent Enhancements and Research Highlights at the NEES@UCSB Permanently Instrumented Field Sites Jamison H. Steidl

  2. What is NEES@UCSB ? • Multi-Disciplinary Earthquake Engineering Field Site for Earthquake Monitoring and Active Experiments • Steidl – Earth Science, Engineering Seismology • Youd – Geotechnical Engineering, Liquefaction • Nigbor – Structural Engineering • Constructed 2002-2004 • Operations 2004-2014

  3. What is NEES@UCSB ? • Earthquake monitoring: Densely instrumented field sites that continuously record observations of: • Ground accelerations at the surface and at multiple depths within the soil column and rock below • Pore pressure within the soil column • Foundation and structural response of a simple reconfigurable steel-framed structure

  4. What is NEES@UCSB? • These field sites provide the insitu case histories for validation and calibration of our end-to-end (rupture to rafters)simulation codes • Predicting ground motions that include the effects of the near surface geotechnical layers, and Soil-Foundation-Structure Interaction (SFSI) effects.

  5. What is NEES@UCSB ? • Active Source Testing: We don’t just sit and wait for earthquakes to happen! • Densely instrumented field sites that provide observations from active sources: • T-Rex and Liquidator (NEES@Utexas) • Large Shakers (NEES@UCLA) • Permanent shaker mounted to SFSI structure • Permanent Borehole Sources (new FY2010)

  6. Facility Enhancements • Web-based data dissemination tools • Waveform Explorer • Addition of International Geotechnical Array Data • Tele-Operational SFSI shaker • Permanent Cross-Hole Array • Shape Accelerometer Arrays

  7. Research Highlights • NEESR UCB Grand Challenge Project • NEES@UCLA working at WLA (2010) and GVDA (2011) • NEESR CMU Research • Testing with T-Rex at GVDA and WLA in 2010 and 2012 • NEESR RPI Research • Testing with T-Rex at WLA in 2010 and 2012 • Poster Session at Quake Summit 2012

  8. EOT Highlights • Animations of the SFSI and Mini-Me structures using earthquake data • See poster • Animations of Site Response at GVDA using earthquake data • See poster • Use of the permanent tele-operational SFSI shaker at GVDA for classroom instruction • Network adoption of the MYOE activity

  9. http://nees.ucsb.edu

  10. http://nees.ucsb.edu/facilities

  11. http://nees.ucsb.edu/data

  12. http://nees.ucsb.edu/data

  13. http://nees.ucsb.edu/data Data Portal Screen Cast Tutorial http://dl.dropbox.com/u/49050676/Data%20Portal%20Tutorial.mov

  14. http://nees.ucsb.edu/data

  15. http://nees.ucsb.edu/data

  16. The Event Search

  17. The Event Search • From 10/1/2004 to 6/30/2012 • 4660 M1+ events available at GVDA • 6608 M1+ events available at WLA • We use a radius that increases as magnitude increases, so small events only from very close to site. Progressively larger events from progressively farther away.

  18. Select Your Event

  19. Choose Waveforms to View

  20. Click the view button and launch waveform explorer tool dbwfserver NEES / EarthScope Collaboration Thanks to EarthScope Array Network Facility Rob Newman Juan Reyes Kent Lindquist Frank Vernon

  21. Waveform Viewer

  22. Waveform Viewer User Config

  23. Waveform Viewer Zoom & Scroll

  24. Download Data

  25. Download Data

  26. Concurrent Development at NEEShub

  27. Future Work • Matlab reader automatically added to download package for miniseed binary files • Expand: Include vertical array data from other national and international providers

  28. Permanent Cross-Hole ArrayDaily Up/Down Hammer tests

  29. Permanent Cross-Hole ArrayDaily Up/Down Hammer tests

  30. Permanent Cross-Hole ArrayDaily Up/Down Hammer tests

  31. Permanent Cross-Hole ArrayDaily Up/Down Hammer tests Shear wave velocity appears to have a seasonal dependence on water table depth

  32. Permanent Cross-Hole ArrayDaily Up/Down Hammer tests • Automatic Triggering of Cross-Hole source after threshold ground motion level • Starts 3 minutes after threshold • Hammer source then triggers every 5 minutes • Slowly gets back to once per day • The ability to examine shear-wave velocity decrease and recovery following large earthquake with permanent cross-hole array is a one-of-a-kind unique capability

  33. Special Thanks to the nees@UCSB Team: Please visit us at . . . Sandy Seale Paul Hegarty Francesco Civlilini Robin Gee Special Thanks to our Sponsor NSF http://nees.ucsb.edu/ The George E. Brown, Jr. Network for Earthquake Engineering Simulation (NEES) Program of the National Science Foundation Award Numbers CMS-0217421, CMS-04002490, and CMMI-0927178

  34. Thank You!

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