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Workshop Breakout Sessions

(by invitation only)

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Session 1: Are redundancy considerations sufficient in current design codes, such as AASHTO?  (Chair: Wagdy Wassef)

  • How to assure sufficient redundancy during design process?

  • Robustness as a measure of redundancy?

  • How to recommend practical method to evaluate redundancy: new and existing bridges?

  • Redundancy of concrete bridges as recommended by NTSB as a result of FIU bridge collapse?

Session 3: Current simulation technology during the design process. (Chair: Dr. Sherif El-Tawil)

  • Type and Level of Analysis: Linear / Nonlinear static; Linear / Nonlinear dynamic

  • Full 3-D versus 2-D analysis.

  • Alternate load path methods

  • Pushdown analysis methods

Session 4: Role of hazards in redundancy considerations. (Chair: Dr. Hani Nassif)

  • Types of hazards / Type of initiating hazard.

  • Deterministic / probabilistic framework / Fragility

  • Limit states for bridges from hazard perspective (how a particular limit state likely to be activated following the loss of a member?)

  • Identification of critical members from hazard perspective

  • Load driven / load independent redundancy

Session 2: Member based analysis versus system criticality (Chair: Dr. Baidurya Bhattacharya)

  • Full 3-D versus 2-D analysis.

  • Inspection / Bridge Management: Does redundancy have a role?  Does element level inspection assure system level safety? (I-35 Bridge)

  • Element capacity versus system safety

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