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An Introduction to Substructure Considerations for Post-Tensioned Highway box Girders (in English)
J. Paul Guyer
Synopsis "An Introduction to Substructure Considerations for Post-Tensioned Highway box Girders (in English)"
Introductory technical guidance for civil and structural engineers interest in design of box girder structures for bridges and highways. Here is what is discussed: 1. INTRODUCTION 2. BENDING MOMENTS CAUSED BY UNIT EFFECTS 3. DEAD LOAD—DC (SELF WEIGHT AND BARRIER RAILING) 4. DEAD LOAD—DW (FUTURE WEARING SURFACE) 5. LIVE LOAD—LL (LANE AND TRUCK COMPONENTS) 6. POST-TENSIONING SECONDARY MOMENTS—UNIT PRESTRESSING FORCE. 7. THERMAL GRADIENT (TG)—20°F LINEAR. 8. MOMENTS RESULTING FROM TEMPERATURE RISE AND FALL 9. MOMENTS RESULTING FROM CONCRETE SHRINKAGE 10. MOMENTS RESULTING FROM CONCRETE CREEP 11. BENDING MOMENTS SUMMARIES 12. POST-TENSIONING FORCE COMPARISON (AFTER ALL LOSSES, WITH THERMAL EFFECTS).