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4th NEES Annual Meeting Kenneth H. Stokoe, IIWashington, DC June 22, 2006
Collaborative Activities of a NEES Equipment Site:
Examples from nees@UTexas
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Outline
• Mission of Equipment Sites• Introduction to nees@UTexas• On-going NEESR Projects• On-going non-NEESR Projects• Education, Outreach, and Training
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Mission of Equipment Sites
1. Equipment Sites (ES) facilitate large-scale field and laboratory experiments that were not possible before the NEES Collaboratory
• maintain, operate and enhance the major pieces of the testing equipment
• educate potential users, advise and assist in proposal preparation, participate in safely conducting the experiments, and assist in importing data to NEEScentral
2. ES support education, outreach and training activities
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Introduction to nees@UTexas
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Personnel at nees@UTexas
PI: Kenneth H. Stokoe, IICo-PI: Ellen M. RathjeCo-PI: Clark R. WilsonOperations Manager: Farn-Yuh MenqComputer Systems Analyst: Christopher StantonVibroseis Specialist: Cecil HoffpauirMechanical Technician: Andy ValentineElectrical Technician: Frank WiseAdministrative Staff: Teresa Tice-Boggs and
Norma Gonzales
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Overview of nees@UTexas Equipment Site
Function: dynamic field testing of geotechnical and structural systems with large-scale mobile shakers
Equipment:• Three mobile shakers with diverse force and frequency
capabilities • Tractor-trailer rig to move shakers • Instrumentation van + trailer• Wired and wireless data acquisition systems • State-of-the-art field instrumentation • Tele-presence capabilities for remote researcher
interaction
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Tri-Axial Shaker (“T-Rex”)
• Buggy-mounted vibrator• Total weight – 64,000 lb (29,030
kg)• 32 ft (9.8 m) long• 8 ft (2.4 m) wide
• 3 Vibration orientations– Vertical– Horizontal in-line– Horizontal cross-line
• Uses vegetable-based hydraulic oil (Mobile EAL 224H)
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Hollow Push Rod
Liquefiable LayerLiquefaction Sensor
Wire Ropeand
Electrical Cable
Hydraulic Cylinder
Installation of Embedded Sensors
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Low-Frequency Shaker (“Liquidator”)
• Built on same platform as the T-Rex• Optimized for low-frequency (down to 0.5 Hz) force output
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Urban Shaker (“Thumper”)
• Built for high-frequency force output (beyond range of T-Rex and Liquidator)• Built for use in urban environments• Total weight = 22,600 lb (9,980 kg) • Peak force = 6,000 lb (26.7 kN)• Transformable to operate vertically or horizontally
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Tractor-Trailer Transport System(for T-Rex and Liquidator)
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Instrumentation Van + Trailer
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On-going NEESR Projects
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Collaborative Research: Using NEES as a Testbed for Studying Soil-Foundation-Structure-Interaction
PI: Sharon L. Wood Universities involved: University of Texas at Austin, Purdue University, University of California–Davis, University of Nevada-Reno, University of Washington-Seattle, and University of California–Berkeley
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Field Evaluation of Liquefaction Resistance at Previous Liquefaction Sites in Southern California (Imperial Valley)
PIs: Kenneth H. Stokoe, II and Ellen Rathje
nees@UCSBWildlife Refuge Liquefaction Field Site
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Study of Surface Wave Methods for Deep Shear Wave Velocity Profiling Applied to the Deep Sediments of the Mississippi
EmbaymentPI: Brent Rosenblad
Liquidator
MORT strong motion Station at Tiptonville, TN
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On-going Non-NEESR Projects
(also “Outreach” Activity)
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Spectral-Analysis-of-Surface-Wave (SASW) Testing at Yucca Mountain Site
PI: Kenneth H. Stokoe, II
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Education, Outreach, and Training
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Education: Undergraduate Foundation Engineering Class
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Education: Graduate Soil Dynamics Class
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Education: Demonstration at an Elementary School in Gosnell, AR
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Topic: exploring the potential of a multi-facility and multi-funded approach to solving scientific and engineering problems
Where: University of Texas, Austin, Texas
When: April 29 and 30, 2004
Recent Outcome: 3 projects
Outreach: NEES/IRIS/USGS Workshop
Primarily funded by IRIS and USGS
Spearheaded by Joan Gomberg, USGS
31 invited participants
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Outreach: NEES/IRIS/USGS Workshop
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Up Coming Users' Training
• When: mid November, registration opens on October 1st.
• What: choosing the right equipment, budget planning, test scheduling, and using SingleShot.
• Why: get your NEESR proposal done faster.
• Where: WebEx based on-line training – no traveling cost!
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Thank You• U. S. National Science Foundation, Directorate
for Engineering, Division of Civil and Mechanical Systems for funding under the George E. Brown, Jr. Network for Earthquake Engineering Simulation (NEES) Program Contract No. CMS-0086605 (Construction Phase)
• NEESinc supported by the George E. Brown, Jr. Network for Earthquake Engineering Simulation (NEES) Program of the National Science Foundation under Award Number CMS-0402490 (Operation Phase)