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Multi-Site Soil-Structure-Foundation Interaction Test (MISST)

Multi-Site Soil-Structure-Foundation Interaction Test (MISST). PI: Bill Spencer, Illinois Co-PIs: Amr Elnashai , Dan Kuchma, Illinois Jim Ricles, Richard Sause, Lehigh Tarek Abdoun, Ricardo Dobry, RPI

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Multi-Site Soil-Structure-Foundation Interaction Test (MISST)

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  1. Multi-Site Soil-Structure-Foundation Interaction Test (MISST) PI: Bill Spencer, Illinois Co-PIs: Amr Elnashai, Dan Kuchma, Illinois Jim Ricles, Richard Sause, Lehigh Tarek Abdoun, Ricardo Dobry, RPI Researcher/Personnel: Sung Jig Kim, Curtis Holub, Naru Nakata, Hassan Radwan, Tommy Marullo, Sogata Roy

  2. Overview • Pre-NEES R MISST; funding $30k per site, $90k total • Project is a demo that has the objective: To provide a realistic test bed application with which to verify and extend all components of NEESgrid as well as all components of the sites taking part in the distributed simulation

  3. Basis Aspect of the Simulation • Communication between modules conducted through NTCP • Advanced analytical geotechnical modeling under dynamic loading • Advanced analytical structural modeling under dynamic loading • Advanced structural testing using multi-degrees-of-freedom testing facilities

  4. UI-SIMCOR Design Concept UI-SIMCOR • Hybrid simulation: Integration of analysis and experiments • Interoperability of modules: Number of experimental sites, analytical modules, and their role in the PSD test are not restricted. • NEESgrid compatibility: Data communication through NEES Tele-Operations Control Protocol (NTCP) MUST-SIM Facility, UIUC

  5. UI-SIMCOR Design Concept UI-SIMCOR User defined Matlab functions via API FEDEAS Lab Experiment UIUC Lehigh • Hybrid simulation: Integration of analysis and experiments • Interoperability of modules: Number of experimental sites, analytical modules, and their role in the PSD test are not restricted. FEDEASLab • NEESgrid compatibility: Data communication through NEES Tele-Operations Control Protocol (NTCP)

  6. UI-SIMCOR Design Concept UI-SIMCOR Updated protocols can be readily integrated into framework if API is maintained • NEESgrid compatibility: Data communication through NEES Tele-Operations Control Protocol (NTCP) Courtesy of NEESit http://mae.cee.uiuc.edu/

  7. Objectives Three Site Five Component Distributed Hybrid Bridge System • Connect three sites on line and run a structural-geotehcnical system that demonstrates the potential of NEES to investigate systems that could not be studied before • Harden simulation coordination software UI-SIMCOR and refine its capabilities • Secondary: Demonstrate that complex shear failure modes observed in the field (in this case, on the C-D 36, part of the I-10 Santa Monica Freeway in LA damaged by the 17 January 1994 Northirdge earthquake) can be duplicated in the NEES hybrid simulation environment

  8. MISST Test Structure • The MISST structure is based on the Collector-Distributor 36 of the I-10 Santa Monica Freeway • Damaged during the 17 January 1994 Northridge Earthquake • Idealization of the original structure: • To utilize current NEES experimental facilities and for simplification • Large-scale NEES facilities of both UIUC and Lehigh University • Geotechnical modeling at RPI

  9. Configuration of MISST UI-SIMCOR Simulation Approach Multi-Site Simulation System NEESgrid Zeus-NL Lehigh UIUC RPI OpenSees

  10. Experimental Setup UIUC Lehigh

  11. Input Motions and Test Sequence PGA: 0.583g Northridge Earthquake Records • Santa Monica City Hall Grounds – PGA=0.37g • Small Amplitude Test: 998 steps (4.99 sec) • Large Amplitude Test: 2354 steps (11.42 sec) • Newhall Fire – PGA=0.583g • Final (failure) Test: 1210 steps (6.05 sec) Santa Monica Station Newhall Fire Station

  12. Final Test Results Lehigh UIUC • Comparison with analytical prediction • Comparison between UIUC and Lehigh piers

  13. Lateral Force - UIUC Load-sharing between UIUC and Lehigh During Testing UIUC Lehigh

  14. Synchronized Still Image Cameras

  15. High Resolution Video

  16. Failure Modes Illinois and Lehigh UIUC Lehigh

  17. Conclusions Three Site Distributed Hybrid Bridge System • The multi-site test of three sites, UIUC, Lehigh and RPI, for a five-component hybrid (testing-analysis) system was conducted successfully using UI-SimCor as a simulation coordinator. • The redistribution of forces between the two sites with bridge piers as either of the two suffered partial failure shows that full interaction was taking place between the distant sites, at each time step. • The failure modes obtained are similar to those observed in the Northridge earthquake, thus opening the door to formulating design and retrofitting approaches to avoid such failures in the future.

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