Ben, Jonathan, Mason, Kambriea Design Team 1

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Presentation transcript:

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

Statement of the Problem 100 year flood damage Disrupts traffic Danger to State College residents Severe flooding from a 100 year flood damaged a bridge over Spring Creek, State College PA. Heavily traveled, disrupting traffic and danger because 1st responder vehicles do not have direct access to that area of State College

Project Objective Design replacement bridge Emergency, fast-paced project Penndot Engineering district 2 initiated a fast-track, emergency project to design a new bridge to replace the recently destroyed bridge.

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

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

Phase 1: economic efficiency

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

The results: structural efficiency EDSGN100 Design Team# Howe Truss Bridge Weight (grams) Bridge Weight (lbs.) Load at Failure (lbs.) Structural Efficiency 1 83.4 0.1839 58.5 318 2 84.6 0.1865 43.5 233 3 65.3 0.1440 36.0 250 4 83.6 0.1843 236 5 69.0 0.1521 71.0 467 6 76.2 0.1680 66.0 393 EDSGN100 Design Team# Warren Truss Bridge Weight (grams) Bridge Weight (lbs.) Load at Failure (lbs.) Structural Efficiency 1 78.7 0.1735 43.4 250 2 91.2 0.2011 76.0 378 3 54.9 0.1211 21.0 173 4 86.7 0.1911 58.5 306 5 74.2 0.1636 43.5 266 6 73.5 0.1620 36.0 222 Minimum 233 Maximum 467 Range 234 Average 316 Geomean 304 Minimum 173 Maximum 378 Range 205 Average 266 Geomean 258

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

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