Recent Enhancements and Research Highlights at the NEES@UCSB Permanently Instrumented Field Sites...
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Transcript of 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
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 2002-2004Operations 2004-2014
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
What is NEES@UCSB ?
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.
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)
What is NEES@UCSB ?
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
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
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
http://nees.ucsb.edu
http://nees.ucsb.edu/facilities
http://nees.ucsb.edu/data
http://nees.ucsb.edu/data
http://nees.ucsb.edu/data
http://dl.dropbox.com/u/49050676/Data%20Portal%20Tutorial.mov
Data Portal Screen Cast Tutorial
http://nees.ucsb.edu/data
http://nees.ucsb.edu/data
The Event Search
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.
Select Your Event
Choose Waveforms to View
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
Waveform Viewer
Waveform Viewer User Config
Waveform Viewer Zoom & Scroll
Download Data
Download Data
Concurrent Development at NEEShub
Future Work
Matlab reader automatically added to download package for miniseed binary files
Expand: Include vertical array data from other national and international providers
Permanent Cross-Hole ArrayDaily Up/Down Hammer tests
Permanent Cross-Hole ArrayDaily Up/Down Hammer tests
Permanent Cross-Hole ArrayDaily Up/Down Hammer tests
Permanent Cross-Hole ArrayDaily Up/Down Hammer tests
Shear wave velocity appears to have a seasonal dependence on water
table depth
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
Please visit us at . . .
http://nees.ucsb.edu/
Special Thanks to the nees@UCSB Team:
Sandy SealePaul HegartyFrancesco CivliliniRobin Gee
Special Thanks to our Sponsor NSF
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
Thank You!