Camp Elliott Field Station
Large High Performance Outdoor Shake Table
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Grand Opening Demonstration
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The overall Camp Elliott development project is a $9.75 million undertaking.
UCSD will receive $5.9 million from NSF to build the UCSD LHP Outdoor
Shake table, which includes the following components:
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Steel table platform (platen)
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Reinforced concrete reaction mass
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Two servo-controlled dynamic actuators
with large servo-valves
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Platen sliding system (hydrostatic pressure
balance bearings)
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Overturning moment restraint system (discrete
tension cylinder prestressing system)
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Real-time multi-variable controller
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Weatherproofing system
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Networked tele-participation capabilities,
including high-resolution digital video and imaging capabilities
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Large High Performance
Outdoor Shake Table
The UCSD LHP Outdoor Shake Table is being developed at the Field Station
at Camp Elliott, a site located 15km away from the main UCSD campus.
The shake table, acting in combination with equipment and facilities
separately funded by the California Department of Transportation
(Caltrans), which include a large laminar soil shear box and two
refillable soil pits, will result in a one-of-a-kind worldwide
seismic testing facility. This unique facility will enable next
generation seismic experiments to be conducted on very large structural
and SFSI systems such as full-scale buildings, single and multiple
column bridge bents in a laminar soil box, utility/lifeline structures
such as electrical sub-stations, nuclear containment casks, and
seismic isolation systems. Moreover, the proximity of a soil pit
to the UCSD LHP Outdoor Shake Table will allow hybrid shake table-soil
pit experiments to be conducted. UCSD is convinced that this innovative
piece of NSF equipment in conjunction with the Caltrans SFSI facility
will add unique testing capabilities to NEES and consolidate the leadership of the
NEES collaboratory as the predominant earthquake testing consortium
in the world.
The NEES/LHP Outdoor Shake Table is a 7.6m wide by 12.2m long single
DOF system with the capability of upgrading to 6-DOF. The specifications
for the first phase of the facility are a stroke of ±0.75m, a peak
horizontal velocity of 1.8 m/s, a horizontal force capacity of
6.8MN, an overturning moment capacity of 50MN-m for a 400 ton specimen,
and a vertical payload capacity of 20MN. The testing frequency
range will be 0-20 Hz. Although this table is not the largest of
its kind in terms of size in the world, the velocity, frequency
range, and stroke capabilities make it the largest table outside
Japan and the world's first outdoor shake table. The facility will
add a significant new dimension and capabilities to existing United
States testing facilities with no overhead space and lifting constraints.
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