AASHTO LRFD Segmental Post-Tensioned Box Bridge Preliminary Longitudinal Design

  • Approximate tendon layout
  • Provisional ducts
  • Live load scenarios
  • Shear lag
  • Estimation PT tension balancing stress
  • Estimation of number of tendons
  • Example

Bridge Design Flowchart

Start Material Selection Design Basis Construction Stages Preliminary Girder Design Based on Span Length & Width Dead Load Live Load Service Limit Checks Preliminary Tendon Design Prestress Losses Concrete Stress Checks at Construction Concrete Stress Checks at Service Canber and Deflection Strength Flexure Strength Shear Interface Shear Design Deck Design Bridge Modeling