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NEES Demonstration Project

NEES Demonstration Project. Second Project Meeting 27 January 2004. Prototype Structure. Computational Model. Structural Tests. Centrifuge Tests. Field Tests. Shaking Table Tests. Agenda. Update on status of each experimental phase of project. Enhance collaborative activities.

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NEES Demonstration Project

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  1. NEES Demonstration Project Second Project Meeting 27 January 2004

  2. Prototype Structure Computational Model Structural Tests Centrifuge Tests Field Tests Shaking Table Tests

  3. Agenda • Update on status of each experimental phase of project. • Enhance collaborative activities. • Computational models. • Integration of data issues into experimental plan. • Integration of educational and research activities.

  4. Prototype Structure • Continuous reinforced concrete bridge with drilled shaft foundations and varying column heights • Prototype driven by shaking table model • Representative of bridges in California, Nevada, and Washington

  5. Shaking Table Tests • Design nearly complete • Additional mass being discussed • Structural drawings under development

  6. Field Tests • Identified site in Austin • Preliminary soil properties

  7. Field Tests • Used structural plans from shaking table • Test matrix: • Two isolated shafts • Two bents

  8. 3'-0" 12" 10'-0" 6'-3"

  9. Structural Component Tests • Two bents at quarter scale • Three columns at half scale • Experimental parameters: • Amount of transverse reinforcement • Aspect ratio of column

  10. Centrifuge Tests

  11. Communication within Project • Use of UTNEESPOP • Archiving Design Documents • Video Conferencing • Schedule Regular Meetings

  12. Computational Modeling • Evaluation of prototype. • Prediction of experimental response • Prediction of response from centrifuge needed as input for shaking table. • Verification of computational models using experimental data. • Comprehensive study of prototype using verified models.

  13. Data Issues

  14. Integration of Educational Activities

  15. Project Schedule • Field Tests • Site characterization: ongoing • Construction: spring • Testing: spring and summer • Shaking Table Tests • Design: ongoing • Construction bids: spring • Testing: September

  16. Project Schedule • Structural Tests • Design: ongoing • Construction: spring and summer • Testing: fall • Centrifuge Tests • Design: ongoing • Testing: first container – end of summer

  17. Outreach Activities • OpenSees Workshop • Poster – EERI Annual Meeting • Poster and Paper – 13WCEE

  18. Outreach Activities (Proposal) • Solicit input on design of experiments. • Encourage development of complementary projects. • Organize prediction challenges. • Present at professional meetings.

  19. Possible Piggyback Projects • Develop T-Rex for centrifuge • Shake surface of soil in centrifuge to compare with field data • Structural shakers for field • Compare structural excitation with ground excitation • Small-scale column tests • Enhance parameter study • Add pipe to shaking table specimen • New sensors for centrifuge or field tests

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