Current Project:
In-Situ Liquefaction Tests at Christchurch, NZ

In 2010-2011, the city of Christchurch, New Zealand was devastated by a series of powerful earthquakes, which caused repeated liquefaction throughout its residential suburbs. NEES@UTexas conducted a series of field tests between 6/15/2013 and 7/16/2013, with the goal of determining 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.

Equipment Sites

Equipment Site Map
(Click a red disk to select a different equipment site)

What is NEES?

The George E. Brown, Jr. Network for Earthquake Engineering Simulation (NEES) is a national, networked, simulation resource that includes geographically-distributed, shared-use, next-generation experimental research Equipment Sites built and operated to advance earthquake engineering research and education through collaborative and integrated experimentation, theory, data archiving, and model-based simulation. The goal of NEES is to accelerate progress in earthquake engineering research and to improve the seismic design and performance of civil and mechanical infrastructure systems through the integration of people, ideas, and tools in a collaboratory environment. Open access to and use of NEES research facilities and data by all elements of the earthquake engineering community, including researchers, educators, students, practitioners, and information technology experts, is a key element of this goal.

Introduction to nees@UTexas
(A higher resolution introduction video is available here)

What is nees@UTexas?

nees@UTexas is an equipment site that specializes in dynamic field testing using large-scale shakers. The nees@UTexas equipment includes five mobile shakers that have diverse force and frequency capabilities, an instrumentation van that houses state-of-the-art data acquisition systems, and a large collection of field instrumentation. The field equipment can be used in a variety of applications, including shear wave velocity characterization, liquefaction testing, geophysical testing, and dynamic testing of structures. During experiments the instrumentation van can connect to the NEESgrid via wireless uplink, allowing offsite access to both live video and data.

NEES@UTexas Overview Poster (PDF, 181KB)
NEES@UTexas Overview Slides (PDF, 3.5MB)

T-Rex (Tri-Axial) Liquidator (Low Frequency) Thumper (High Frequency/Urban)

NEES@UTexas 2014 Safety Plan (PDF, 1.1MB)

University of California, Berkeley: Reconfigurable Reaction Wall-Based Earthquake Simulator Facility University of California, Davis: Geotechnical Centrifuge (Modeling) Facility University of California, Santa Barbara: Permanently Instrumented Field Sites for Study of Soil-Foundation-Structure Interaction University of California, Los Angeles: Field Testing and Monitoring of Structural Performance University of California, San Diego: Large High Performance (LHP) Outdoor Shake Table University of Texas at Austin, Large-Scale Mobile Shakers and Associated Instrumentation for Dynamic Field Studies of Geotechnical and Structural Systems Lehigh University: Real-time Multi-directional Testing Facility for Seismic Performance Simulation of Large-Scale Structural Systems Rensselaer Polytechnic Institute: Upgrading, Development and Integration of Next Generation Earthquake Engineering Experimental Capability Cornell University: Large Displacement Soil-Structure Interaction Facility for Lifeline Systems University at Buffalo, SUNY: Versatile High Performance Shake Tables Facility towards Real-Time Hybrid Seismic Testing University of Nevada, Reno: Multiple Biaxial Shake Table Research Facility University of Illinois at Urbana-Champaign: Multi-Axial Full-scale Sub-Structuring Testing & Simulation Facility Oregon State University: Multidirectional Wave Basin for Remote Tsunami Research University of Minnesota, Twin Cities: A System for Multi-Axial Subassemblage Testing (MAST)