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UC SAN DIEGO
NHERI EXPERIMENTAL FACILITY


DESIGNSAFE-CI: A NATURAL HAZARDS ENGINEERING COMMUNITY

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FACILITY OVERVIEW

 

The National Science Foundation sponsored Natural Hazards Engineering Research
Infrastructure (NHERI) Experimental Facility at the University of California,
San Diego will provide a large, high performance, outdoor shake table (LHPOST6)
to support research in structural and geotechnical earthquake engineering.
Earthquakes have had considerable destructive effects on society in terms of
human casualties, property and infrastructure damage, and economic losses.
Building a multi-hazard, disaster-resilient, and sustainable environment
requires the understanding and ability to predict more reliably the system-level
response of buildings, critical facilities, lifelines, and other civil
infrastructure systems to these extreme events. This facility will enable
research, with extensively instrumented large- or full-scale structural,
geotechnical, and soil-foundation-structural systems tested under extreme
earthquake loads, to produce the experimental data essential to advancing
predictive seismic performance tools. Research experiments performed using
LHPOST6 will provide life-size investigation that will transform the practice of
earthquake engineering and educate graduate, undergraduate, and K-12 students,
as well as the general public, about natural disasters and the national need to
develop effective technologies and policies to prevent these natural hazard
events from becoming societal disasters.

The LHPOST6, with a steel platen that is 12.2 meters long by 7.6 meters wide,
has performance characteristics that allow the accurate reproduction of near-
and far-field earthquake ground motions. The facility will support seismic
testing, under near real-world conditions, of large structural, nonstructural,
geotechnical, and geostructural systems, as well as soil-foundation-structural
systems, up to a weight of 20 MN. Two large soil boxes can be used in
conjunction with the shake table to investigate the seismic response of
soil-foundation-structural systems. Software and hardware are available to
support hybrid testing with substructures on the shake table. Systems tested at
the facility can utilize extensive data acquisition and instrumentation
capabilities, including a broad array of state-of-the-art sensors and
high-definition video cameras, to support detailed monitoring, through hundreds
of data channels, of the system response. The landmark system-level tests
performed using this facility will provide fundamental knowledge and data to
support the development, calibration, and validation of high-fidelity,
physics-based computational models of structural, geotechnical, and
soil-foundation-structural systems that will progressively shift the current
reliance on physical testing to model-based simulation for the seismic design
and performance assessment of civil infrastructure systems. These simulation
tools will directly benefit the full realization of performance-based design to
evaluate and reduce the risks of the built environment to natural hazards. This
shake table facility can provide the validation tests for retrofit methods,
protective systems, and the use of new materials, components, systems, and
construction methods for disaster-resilient and sustainable civil
infrastructure.

See our Science Plan for more information on research that can be conducted
using LHPOST6.



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The University of California, San Diego Experimental Facility is supported by a
grant from the National Science Foundation (#1520904).