Recent Enhancements and Research Highlights at the 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  Operations What is ?

 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 ?

 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  Large Shakers  Permanent shaker mounted to SFSI structure  Permanent Borehole Sources (new FY2010) What is ?

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  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

Data Portal Screen Cast Tutorial

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

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 Array Daily Up/Down Hammer tests

Shear wave velocity appears to have a seasonal dependence on water table depth

Permanent Cross-Hole Array Daily 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... Special Thanks to the Team: Sandy Seale Paul Hegarty Francesco Civlilini Robin 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 , CMS , and CMMI

Thank You!