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NEES Project Warehouse

Development of Next Generation Adaptive Seismic Protection Systems
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Complete - 05/16/2012

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Experimental study on the Negative Stiffness Device (NSD)
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DOI:10.4231/D35Q4RM13
Experiment Type: Shake Table
Description: In this experiment, the force-displacement behavior of the negative stiffness device is studied. Two devices are used in this test: NSD-East and NSD-West. The devices are installed in a test-rig and they are subjected to periodic ground motions at different frequencies. The devices are extensively instrumented to understand the behavior each of the components. The force-displacement behavior of the device is also modeled using the analytical equations derived in this study. The obtained experimental results are in excellent agreement with the predicted simulation results.
Dates: October 01, 2008 - September 01, 2010
Facility: State University of New York at Buffalo, NY, United States
Equipment: View Details
Specimen Type: Negative stiffness device (view)
Material: Gap spring assemblies Gap spring assemblies (view)
NSD main frame NSD main frame (view)
Sensors: Accelerometers
Stringpots
Load Cells
Krypton
Drawings: more...
Data:
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Documentation:
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Analysis:
Images:
Tags (keywords):
  1. Negative stiffness device
  2. baseisolatedbuilding
  3. seismicisolation
  4. shaketabletesting
  5. weakening and damping
Cite this work:
Apostolos Sarlis, Dharma Theja Pasala, Michael Constantinou, Andrei Reinhorn, Satish Nagarajaiah, Douglas Taylor, John Metzger (2013). "Experimental study on the Negative Stiffness Device (NSD)", Network for Earthquake Engineering Simulation (distributor), Dataset, DOI:10.4231/D35Q4RM13