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System Observability , Diagnosis, and Prognosis

System Observability , Diagnosis, and Prognosis. Yr 5 Project Team: Dr Rudi Seracino (PI) Mrs Anna Harris Clark (MS graduate) Mr Hao Hu (PhD candidate). Types and number of failures (Wardhana et. al., 2003). Project Overview. Develop a vibration-based damage detection framework to:.

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System Observability , Diagnosis, and Prognosis

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  1. System Observability, Diagnosis, and Prognosis Yr 5 Project Team: Dr Rudi Seracino (PI) Mrs Anna Harris Clark (MS graduate) MrHao Hu (PhD candidate)

  2. Types and number of failures (Wardhana et. al., 2003) Project Overview

  3. Develop a vibration-based damage detection framework to: Overall Objectives • Rapidly assess scour and other flood related damage of critical life-line bridge infrastructure following an event to inform decision makers about the condition of evacuation and first responder routes; and • Create a prognostics framework to evaluate the condition of critical life-line bridge infrastructure prior to an event to enhance resilience.

  4. Enhanced communityresilience, system robustness and capacity for recovery by: • Increasing resilienceto disasters by enhancing preparedness; • Enabling more efficient evacuation and emergencyresponse; and • Facilitating more rapidrecovery. Project Relevance to DHS S&T Mission Mississippi & Missouri River Pacific NW & Atlantic Coast

  5. Existing Scour Monitoring Techniques Echo Sounders [Mueller et al., 1999] Sounding weights [Mueller et al., 1999] Vibrating rod [Zarafshan et al., 2012] Tiltmeters [Briaudet al., 2011] Unmanned Marine Vehicle [Murphy et al., 2011]

  6. Basic Research Concept Ho G.L. scour N.G.L. Increase in pile’s unsupported height Changes in response of the superstructure Decrease in support stiffness Scour

  7. Development of Scour Sensitive Damage Features Horizontal impact Extraction of damage features for changes in horizontal mode shape with scour depth Accelerations due to impact used to create mode shapes

  8. Numerical Modeling

  9. Laboratory Testing 42 in 58 in

  10. Evaluation of Proposed Damage Features * Damage located, ability to identify scour level ** Damage located, not able to identify scour level *** Damage not located, damage zone identified **** Damage location zone not identified

  11. Field Monitoring Hwy 17 Northeast Creek Bridge, Jacksonville, NC

  12. Field Monitoring – NCDOT underwater inspection

  13. Field Monitoring – Data collection

  14. Field Monitoring – NCDOT scour repair

  15. Field Monitoring – Data Analysis

  16. Field Monitoring – Data Analysis Scour Location Horizontal Mode Shape Curvature Scour Location Horizontal Modified Mode Shape Curvature Scour Location Scour Location Flexibility Deflection Curvature Flexibility Deflection

  17. Evaluation of Damage Features * Damage located, ability to identify scour level ** Damage located, not able to identify scour level *** Damage not located, damage zone identified **** Damage location zone not identified

  18. Translation Activities • Dissemination via publication of research theses, international archival journal articles, and peer reviewed conference papers. • Engagement of public and private sector end users. • Participating in outreach activities. • Contributing to NC State University’s “Design Your Own” program – 2-hr short course delivered to engineering professionals. • Developing a module for a new graduate course on “Structural Health Monitoring of Civil Infrastructure”. • Fostering the potential for commercialization of research outcomes.

  19. Currently engaged end users • Infrastructure (bridge) owners • technical knowledge, personnel, equipment • e.g. NCDOT bridge maintenance engineers and hydraulics engineers • Private sector consultants • technical knowledge, ability to transfer knowledge products to application products • e.g. FDH Engineering Inc

  20. Work Plan • Complete the development of the relationship between the change in magnitude of the damage feature to the extent of scour. • Demonstrate the use of existing numerical and analytical models to relate the extent of scour to the residual strength of typical bridge foundations. • Continued field monitoring of Jennette’s Pier and one additional scour prone bridge in coastal NC. • Produce guidelines and recommendations for the implementation of future field monitoring using the proposed technique. • Continue to actively engage end users representative of the public and private sectors.

  21. Products Products • PhD awarded - 2010 • PhD awarded - 2011 • MS awarded - 2012 • PhD candidate (Spring 2014) • 2 journal articles published • 2 journal articles submitted • 5 refereed conference papers Awards • Paper won the Certificate of Achievement for Excellence in Research at the Department of Homeland Security 5th Annual Student Paper Competition • Poster won the American Council of Engineering Companies of North Carolina (ACEC/NC) Student Design Champion grand prize • Best Poster Award at the 11th Structural Engineering and Mechanics (SEM) Symposium

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