UC Davis 1 A NEES Geotechnical Centrifuge Facility at Davis

UC Davis 2 Components of project Speed upgrade - to 80 g Advanced Instrumentation - subcontracts to develop 8- channel sensor managers and to investigate feasibility of wireless communication underground. Robot - in flight testing, construction and inspection New building ft 2 of new space Shaker upgrades - biaxial shaker Geophysical testing Display wall/numerical simulation

UC Davis 3 UCD NEES Advisory Board Tarek Abdoun, Abbas Abghari, JP Bardet, Po Lam, Dave McCallen, Jack Moehle, Paul Van Laak First meeting September 13, 2001 –Three board members attended physically –Two members attended by polycom Project status and other presentations from EAB meeting are posted at: –

UC Davis 4 Questions for SI, CD, NSF NEESpop –Where does it fit in our LAN? –Who pays for it? –What are the specs? Clarification of responsibilities of –NSF, Equipment sites, SI, and CD Who is responsible to make sure that the SI system fits with the equipment sites and the whole NEES works together?

UC Davis 5 Question for Equipment Sites Can we share hardware and software design, development and maintenance costs? –Data Acquisition Systems –LAN hardware and software –NEES Software (visualization, telepresence) –Expertise of people at certain sites may be helpful to other sites

UC Davis 6 Solid model of UCD centrifuge

UC Davis 7 Streamline room SPEED UPGRADE New Bearings New Gear Box

UC Davis 8 UCD Centrifuge Robot

UC Davis 9 Geophysical Methods in the Centrifuge: At GaTech Material property characterization. High resolution ELM Needle probe Semi-reflective multiple layers for GPR-based monitoring S-wave imaging At UC-Davis ELM Needle probe implementation in centrifuge models P-waves/ultrasound: validation with medical devices Development of internal ELM sources Initial implementation of resistivity tomography

UC Davis 10 Biaxial Shaker ABAQUS analysis in progress - safety issues - performance issues NEESgrid support for analysis is appreciated.

UC Davis 11 sensor manager sensor Process buffer transmit SDI 1010x +/- 200g 0 – 2500 Hz data concentrator RESDAQ PC Wireless transceiver Wired data concentrator custom communication serial communication PXI w/ A/D conventional transducers custom communication All data synchronized

UC Davis 12 Wireless concepts (Now focussing on A and B, C seems not optimal due to transmitter/battery size, D is more related to Geophysical Testing component of our NEES project)