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“Efficient Bridge Design Project: Howe vs. Warren Truss Bridge”

Join Ben, Jonathan, Mason, and Kambriea of Design Team 1 as they tackle the challenge of replacing a bridge damaged by a 100-year flood in a fast-paced project. Using high-strength low-alloy and carbon steel, they aim to create an emergency bridge design with structural and economic efficiency in mind. Compare the efficiency and cost of the Howe and Warren truss bridge designs to determine the best choice. Let’s bridge the gap together!

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“Efficient Bridge Design Project: Howe vs. Warren Truss Bridge”

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  1. Bridge Design Project Ben, Jonathan, Mason, Kambriea Design Team 1

  2. Statement of the Problem • 100 year flood damage • Disrupts traffic • Danger to State College residents

  3. Project Objective • Design replacement bridge • Emergency, fast-paced project

  4. Required Design Criteria • Standard abutments • No piers • Medium Strength Concrete • No Cable Anchorages • Designed for the Load of Two Trucks • Bridge Deck Elevation of 20 Meters • Deck Span of 40 Meters • Concept Design of Howe and Warren Through Truss Bridge

  5. Phase 2: structural efficiency Warren: Mass - 0.1735 lbs. (78.7 grams) Load failure - 43.4 lbs. Efficiency - 250 Howe: Mass - 0.1839 lbs. (83.4 grams) Load failure - 58.5 lbs. Efficiency - 318

  6. Phase 1: economic efficiency

  7. The results: economic efficiency High Compression Forces = Hollow Tubes High Tension Forces = Solid Bars High-Strength Low-alloy steel was used when compression strength was high Carbon Steel was used to lower cost Quenched and Tempered was used as a mix between slightly increased cost and increased strength

  8. The results: structural efficiency Minimum 173 Maximum 378 Range 205 Average 266 Geomean 258 Minimum 233 Maximum 467 Range 234 Average 316 Geomean 304

  9. The best solution Structural Efficiency of Howe Bridge Design Average-316 Ours-318 Structural Efficiency of Warren Bridge Design Average-266 Ours-250 Economic Efficiency Comparison Howe: $209,753.26 Warren: $203,851.50

  10. Our conclusions Our Objective Importance of the task The best choice:

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