AASHTO LRFD COMPOSITE STEEL GIRDER BRIDGE GIRDER SIZING

  • Compactness
  • Cross-section proportions: web
  • Cross-section proportions: flange
  • Cross-section proportions: flanges, construction
  • Compactness limits – flanges
  • Compactness limits – webs
  • Depth of web in compression at the plastic moment, Dcp
  • Effective deck width
  • Example
  • Trial sections

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