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University Consortium of Instructional Shake Tables

University Consortium of Instructional Shake Tables. Juan M. Caicedo. Outline. Project Description Objectives Hardware Description Outcomes Conclusions Future. Project Description. Need for introduction to dynamic behavior and earthquake engineering at the undergraduate level

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University Consortium of Instructional Shake Tables

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  1. University Consortium of Instructional Shake Tables Juan M. Caicedo

  2. Outline • Project Description • Objectives • Hardware Description • Outcomes • Conclusions • Future

  3. Project Description • Need for introduction to dynamic behavior and earthquake engineering at the undergraduate level • Large scale shake tables require significant resources and are not widely available. • Development of experiments takes time and expertise

  4. Project Description • History • Proposed at 1998 Trilateral Earthquake Center Education Meeting • MAE Project ED-9: Instruc. Shake Tables • NSF – DUE/CCLI Funding Obtained (DUE Grant No. 9950340 – Aug 1999) • Consortium became operational summer 2000 under direction of Shirley Dyke

  5. Oregon State Univ. Penn State Univ. or Nevada - Reno Notre Dame Washington Univ. UC Davis Univ. of Utah UIUC Virginia Tech Stanford San Jose State Univ. CalPoly Southern Illinois Univ. - Edwardsville Univ. of Nevada – Las Vegas UCLA UC-Irvine UC San Diego Florida A& M Project Description University of Alaska – Fairbanks University of Hawaii

  6. Project Description • Develop and share “hands-on” experiments for earthquake eng. • Identical equipment at each site • Experiment sharing through the web

  7. Objectives • Develop “hands-on” experiments • Earthquake hazard mitigation • Dynamics of structures • Geotechnical engineering • Experience with modern instruments • Public/outreach activities

  8. Hardware • Shake Table • 2 Story building • 3 accelerometers • Computer • Data acquisition • Pendant controller • AMD (Optional)

  9. Hardware • Shake table • Payload 25 lb • Peak acc 1 g • Peak vel 20 in/sec • Freq. 0-20 Hz • Dimensions 18x18 in • Stroke +- 3 in • Weight ~ 100 lb

  10. Hardware

  11. Hardware

  12. Outcomes • Experiments • Demonstration of Non-Structural Seismic Hazards in the Home • Dynamic Behavior of Simple Soil-Structure Systems • Liquefaction Demonstration for the UCIST Shake Table • K-12 Outreach Activities in Earthquake Eng.

  13. Outcomes • Experiments • Tuning of a Vibration Absorber on UCIST Shake Table • Determination of Natural Frequencies and Mode Shapes of Multi-Degree of Freedom Structures • Earthquake-Resistant Bridge Competition for Introductory Eng. Students

  14. Outcomes • Experiments • Small Shake Table Experiments and Comparison to Analytical Predictions • Introduction to Dynamics of Structures

  15. Outcomes

  16. 10000 Feb. Jan. May Jun. Sept. Jul. 8000 Mar. Oct. Aug. 6000 Dec. Hits Nov. Apr. 4000 May Aug. Jul. Jun. Sept. Apr. Mar. 2000 Feb. 0 2000 2001 Outcomes

  17. Outcomes • Experiments used in • Introduction to Civil Engineering • Mechanics of Materials Laboratory • Structural Dynamics • Experimental Methods in Structural Dynamics

  18. Outcomes • Outreach activities • Earthquake Awareness Weekend (WashU)

  19. Outcomes • Outreach activities • K-12 outreach activities (Notre Dame)

  20. Outcomes • Research

  21. Conclusions • UCIST is a lab station for “hands on” experimentation in earthquake engineering • Many experiments are already available • Also, used for outreach and research

  22. Future Work • Measure the effects of UCIST in eng. education • Online survey – beginning Spring ’02 • Web statistics monitored • Maintain, enhance and expand web site

  23. .cive.wustl.edu More Information ucist@cive.wustl.edu

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