NEES NEES

Projects

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  1. Using NEES Field Shakers and IRIS Equipment to Measure Crustal Structure (Completed)
    1. Collaborative Research: Using NEES as a Testbed for Studying Soil-Foundation-Structure-Interaction (Completed)
    2. Field Measurements of the Linear And Nonlinear Shear Moduli of Soils (Completed)
    3. Using NEES as a Testbed for Studying Soil-Foundation-Structure-Interaction (nees@UNR, Completed)
  2. In Situ Determination of Soil Modulus and Damping as a Function of Level of Strain (Completed)
  3. In-Situ Soil Nonlinear Properties Study (Completed)
  4. Using the NEES Field Shakers to Induce Liquefaction at Previous Liquefaction Sites (Completed)
  5. Low-Frequency Surface Wave Testing Methodology (Completed)
  6. Prediction of Dynamic Response of Spread Footings on Sand (Completed)
  7. State and Properties of Recently Liquefied Sands and the Associated Quality Assurance (QA) Metric for Evaluating Remedially Densified Sands that Accounts for Aging Effects (Completed)
  8. Collaborative Study of Determination of Intermediate (100 m) and Deep (300 m) Shear Wave Velocity Profiles for the Community Velocity Model (Completed)
  9. Collaborative Study in the Mississippi Embayment (Completed)
  10. Low-Frequency Surface Wave Testing Methodology - Phase II (Completed)
  11. Seismic Risk Mitigation for Port Systems (Completed)
  12. Subsurface Structure of the Santa Rosa Plain, California, from High-Resolution Seismic-Reflection Data (Completed)
  13. High-Fidelity Site Characterization in the Garner Valley (Active)
    1. Collaborative USGS-NEES Studies in the Santa Rosa Plain, California (Completed)
    2. Collaborative USGS-NEES Studies in the Mississippi embayment and the Seattle Basin (Completed)
  14. SASW Measurements at USGS Hawaiian Strong Motion Network (Completed)
  15. Deep Shear Wave Velocity Measurements in the Las Vegas Basin (Completed)
  16. Collaborative USGS-NEES Earthquake Hazard Studies in the Reno-Carson City Urban Corridor (Completed)
  17. NEESR-II: Advanced Site Monitoring and Effective Characterization of Site Nonlinear Dynamic Properties and Model Calibration (Active)
  18. NEESR-CR: Topographic Effects in Strong Ground Motion - From Physical and Numerical Modeling to Design (Complete)
  19. SASW Measurements at Stanford University (Complete)
  20. Collaborative Earthquake Hazard Studies in the New Madrid Seismic zone and Puget Sound, WA (Complete)
  21. Characterizing the geometry and time of deformation of the Meeman-Shelby Fault near Memphis, TN (Complete)
  22. Seismic Response of Landfills: In-situ Evaluation of Dynamic Properties of Municipal Solid Waste, Comparison to Laboratory Testing, and Impact on Numerical Analyses (Active)
  23. Collaborative Study at Los Alamos National Laboratory (Complete)
  24. Induced Partial Saturation (IPS) through Transport and Reactivity for Liquefaction Mitigation (Active)
  25. Revolutionizing Surface Wave Methods for Engineering Analyses — from Deterministic and Incoherent to Probabilistic and Standardized (Active)
  26. RAPID: Deep Shear Wave Velocity Profiling for Seismic Characterization of Christchurch, NZ — Reliably Merging Large Active-Source and Passive-Wavefield Surface Wave Methods (Active)
  27. RAPID: Field Investigation of Shallow Ground Improvement Methods for Inhibiting Liquefaction Triggering; Christchurch, New Zealand (Active)

Active

STOKOE RAPID NZ Logo
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RAPID: Field Investigation of Shallow Ground Improvement Methods for Inhibiting Liquefaction Triggering; Christchurch, New Zealand

  • Principal Investigator: Kenneth H. Stokoe II, University of Texas at Austin
  • In-situ liquefaction tests at Christchurch, NZ: Field tests were conducted between 6/15/2013 and 7/16/2013. The goal is to determine if and which of several ground improvement methods achieve the objectives of inhibiting liquefaction triggering in the improved ground. Four different ground improvement methods were tested at two test sites.
  • Component Institutions:
COX RAPID NZ Logo
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RAPID: Deep Shear Wave Velocity Profiling for Seismic Characterization of Christchurch, NZ — Reliably Merging Large Active-Source and Passive-Wavefield Surface Wave Methods

  • Principal Investigator: Brady R. Cox, University of Texas at Austin
  • The thrust of this Rapid Response Research (RAPID) grant is to conduct deep (>400 m) Vs profiling at 12-15 key sites in Christchurch, New Zealand to aid in important seismic GM response analyses. This information is needed rapidly, as plans for reconstruction of the Central Business District are proceeding quickly and the proposed testing will be significantly complicated (if not prohibited) once reconstruction begins in earnest in early-to-mid 2013.
  • Component Institutions:
COX RSWM Logo
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Revolutionizing Surface Wave Methods for Engineering Analyses — from Deterministic and Incoherent to Probabilistic and Standardized

  • Principal Investigator: Brady R. Cox, University of Texas at Austin
  • An ever increasing number of researchers and practitioners are using Surface Wave Methods without understanding how acquisition parameters influence the uncertainty of their results. The PI will address these issues in his career by revolutionizing SWMs from Deterministic and Incoherent to Probabilistic and Standardized (DIPS).
  • Component Institutions:
YEGIAN IPS Logo
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Induced Partial Saturation (IPS) through Transport and Reactivity for Liquefaction Mitigation

  • Principal Investigator: Mishac K. Yegian, Northeastern University
  • A research project studying an innovative method for liquefaction mitigation based on inducing partial saturation (IPS).
  • Component Institutions:
ZEKKOS SRL Logo
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Seismic Response of Landfills: In-situ Evaluation of Dynamic Properties of Municipal Solid Waste, Comparison to Laboratory Testing, and Impact on Numerical Analyses

  • Principal Investigator: Dimitrios Zekkos, University of Michigan
  • Evaluate in-situ dynamic properties of municipal solid waste (MSW) in the small and intermediate-to-large strain range; test whether dynamic properties of reconstituted MSW evaluated by large-scale laboratory testing are representative of field conditions; evaluate the major factors that affect MSW dynamic properties; and numerically evaluate the seismic response of landfills.
  • NEEShub: NEES-2010-0920
  • Component Institutions:
NEESRII_ASMEC
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NEESR-II: Advanced Site Monitoring and Effective Characterization of Site Nonlinear Dynamic Properties and Model Calibration

BIELAK_HFSCGV
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High-Fidelity Site Characterization in the Garner Valley

Completed

STOKOE CSLANL Logo
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Collaborative Study at Los Alamos National Laboratory

  • Principal Investigator: Kenneth H. Stokoe II, University of Texas at Austin
  • Borehole acquisition of vertical seismic profiles using T-Rex in both P- and S- modes; a relative site response experiment evaluating the relative response of canyon and ridge sites to vertical SH-waves; and an in-situ experiment to evaluate the nonlinear response of the shallow soft tuff layer Qbt3L.
  • Component Institutions:
MAGNANI MSFMT Logo
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Characterizing the geometry and time of deformation of the Meeman-Shelby Fault near Memphis, TN

  • Principal Investigator: M. Beatrice Magnani, University of Memphis
  • Image the onshore continuation of the Meeman-Shelby Fault (MSF) to investigate in detail the long-term behavior of this structure, and contribute to both the understanding of fault interactions in intraplate settings and earthquake hazard assessments in the Central U.S.
  • Component Institutions:
USGS_ARPS
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Collaborative USGS-NEES Earthquake Hazard Studies in the New Madrid Seismic zone and Puget Sound, WA

  • Principal Investigator: Robert Williams, US Geological Survey (USGS)
  • Provide high-resolution images of the sediment structure and faults in the Arkansas portion of the New Madrid seismic zone and the Puget Sound region, Washington, to provide key constraints on earthquake hazard assessments in these large, at risk areas.
  • Component Institutions:
Logo image
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SASW Measurements at Stanford University

  • Principal Investigator: Ivan Wong, URS Corporation
  • Estimate the levels of ground motions at a specified exceedance probability based on a seismic hazard analysis of the Stanford University campus; calculate deterministic scenario ground motions to compare with the probabilistic ground motions; and perform a site response analysis to incorporate the effects of the near-surface geology beneath the campus into the design ground motions.
  • NEEShub: NEES-2009-0736
  • Component Institutions:
NEESRCR_TESGM
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NEESR-CR: Topographic Effects in Strong Ground Motion - From Physical and Numerical Modeling to Design

  • Principal Investigator: Adrian Rodriguez-Marek, Washington State University
  • Integrate knowledge about topographic effects gained from centrifuge model testing of topographic features; field data acquired with temporary, locally-dense instrumentation arrays recording frequent and predictable stress-induced mining seismicity in a mountainous region of Utah; rigorous numerical modeling studies; and statistical analyses of the NGA strong ground motion database.
  • Component Institutions:
USGS_RCCNV
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Collaborative USGS-NEES Earthquake Hazard Studies in the Reno-Carson City Urban Corridor

  • Principal Investigator: William Stephenson, US Geological Survey (USGS)
  • Acquire high-resolution images of the sediment structure in the Truckee Meadows Basin and vicinity, providing key constraints on earthquake hazard assessments and leading to improved earthquake ground motion simulations of this high-risk area.
  • Component Institutions:
LUKE_DSWVM
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Deep Shear Wave Velocity Measurements in the Las Vegas Basin

  • Principal Investigator: Barbara Luke, University of Nevada Las Vegas
  • Perform SASW-style surface wave testing, filling a vital data gap between shallow depths accessible with existing UNLV test equipment and greater depths imaged through explosive testing and group-wave velocity teleseism measurements.
  • NEEShub: NEES-2009-0672
  • Component Institutions:
Logo image
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SASW Measurements at USGS Hawaiian Strong Motion Network

USGS_CSSRP
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Subsurface Structure of the Santa Rosa Plain, California, from High-Resolution Seismic-Reflection Data

RIX_SRMPS
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Seismic Risk Mitigation for Port Systems

USGS_CSME
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Collaborative Study in the Mississippi Embayment

STOKOE_IDSWVP
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Collaborative Study of Determination of Intermediate (100 m) and Deep (300 m) Shear Wave Velocity Profiles for the Community Velocity Model

  • Principal Investigator: Kenneth H Stokoe II, University of Texas at Austin
  • Contribute to the development of a community velocity model of the Salt Lake Valley basin.
  • NEEShub: NEES-2006-0173
  • Component Institutions:
GREEN_LSAE
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State and Properties of Recently Liquefied Sands and the Associated Quality Assurance (QA) Metric for Evaluating Remedially Densified Sands that Accounts for Aging Effects

HILTUNEN_PDRSFS
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Prediction of Dynamic Response of Spread Footings on Sand

ROSENBLAD_LFSWT
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Low-Frequency Surface Wave Testing Methodology

Logo image
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Using the NEES Field Shakers to Induce Liquefaction at Previous Liquefaction Sites

  • Principal Investigator: Kenneth H. Stokoe II, University of Texas at Austin
  • Develop and implement a new in-situ liquefaction testing technique, based on the premise of dynamically loading a native soil deposit in a manner similar to an earthquake while simultaneously measuring its response with embedded instrumentation.
  • NEEShub: NEES-2007-0414
  • Component Institutions:
Logo image
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In-Situ Soil Nonlinear Properties Study

  • Principal Investigator: Joan Gomberg, US Geological Survey (USGS)
  • Develop a technique for measuring in situ nonlinear sediment response to strong shaking, using experimental laboratory protocols; controlled-source mobile vibrator trucks; and state-of-the-art seismic array recording and processing tools.
  • NEEShub: NEES-2005-0090
  • Component Institutions:
BISCONTIN SMDFS
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In Situ Determination of Soil Modulus and Damping as a Function of Level of Strain

WOOD SFSI
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Collaborative Research: Using NEES as a Testbed for Studying Soil-Foundation-Structure-Interaction

Logo image
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Using NEES Field Shakers and IRIS Equipment to Measure Crustal Structure

  • Principal Investigator: Simon Klemperer, Standford University
  • Conduct a seismic refraction/wide-angle reflection experiment in northwestern Nevada, to help evaluate mechanical models for crustal flow at depth beneath extending regions; and facilitate understanding of basic relationships between topography and crustal structure.
  • NEEShub: NEES-2006-0155
  • Component Institutions: