{ "item_title" : "An Introduction to Substructure Post-Tensioned Highway Box Girders for Professional Engineers", "item_author" : [" J. Paul Guyer "], "item_description" : "Introductory technical guidance for civil engineers, highway engineers, bridge engineers and structural engineers interested in design of concrete bridge substructures. 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).", "item_img_path" : "https://covers3.booksamillion.com/covers/bam/9/79/886/693/9798866930814_b.jpg", "price_data" : { "retail_price" : "47.95", "online_price" : "47.95", "our_price" : "47.95", "club_price" : "47.95", "savings_pct" : "0", "savings_amt" : "0.00", "club_savings_pct" : "0", "club_savings_amt" : "0.00", "discount_pct" : "10", "store_price" : "" } }

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