Design Project 1 Introduction to Engineering Design Section
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Design Project 1 Introduction to Engineering Design Section 001 Penn Engineers Design Team #5 Members: Tommy K. , Sade L. , Michael P. , Nick A.
Penn Engineers
Our Bridge Designs Warren Bridge Design Howe Bridge Design
The Required Design Criteria ● Standard abutments ● No piers (one span) ● Medium strength concrete deck (0. 23 m thick) ● No cable anchorages ● Load of two AASHTO-H 2 O-44 trucks ● Elevated 20 m ● Span exactly 40 m
The Problem
The Project’s Objective ● To create a design for the new Spring Creek bridge
The Technical Approach
Phase 1 : Economic Efficiency Software ● Objectives Engineering Encounters Bridge Design ● Stable Warren and Howe 2016 (EEBD 2016) - Must support dead load and live load ● Lowest cost as possible - Range => $150, 000 to $300, 000
Phase 2 : Structural Efficiency Software ● Objectives Engineering Encounters Bridge Design ● Stable Warren and Howe 2016 (EEBD 2016) - Least amount of forces acting - Smallest deviation from unloaded ● Lowest cost as possible - Range => $150, 000 to $300, 000
The Results
Phase 1 : Economic Efficiency Howe: $235, 760. 86 ● ● Carbon Steel ■ Bars ● 70 x 70 - 130 x 130 mm ■ Tubes ● 45 x 2 320 x 16 mm $1, 053 per unit of Structural Efficiency Warren: $291, 329. 27 ● ● High-Strength Low Alloy Steel ■ Bars ● 140 x 140 - 170 x 170 mm ■ Tubes ● 180 x 9 220 x 11 mm $1, 175 per unit of Structural Efficiency
Phase 2 : Structural Efficiency Howe ● Bridge failure due to lower chord shift ○ ● Warren ● Intact members shifted 224 Bridge failure from glue instability ○ ● Intact members 248 ○ Actual Weight: . 194 lbs ○ Actual Weight: . 145 lbs ○ Load at Failure: 43. 5 lbs ○ Load at Failure: 36 lbs ○ Geomean = 224 ○ Geomean = 265
The Best Solution Howe Bridge ● Higher load at failure (43. 5 lbs. > 36 lbs. ) ● Lower cost ($236 k < $293 k) ● Lower cost per unit of structural efficiency ($1, 053 < $1, 175)
Our Conclusions ● Tasked with designing new Spring Creek bridge ○ Structural efficiency ○ Cost efficiency ● Designed Howe and Warren bridges ○ Cost study ○ Prototype/load testing ● Best solution: Howe bridge ● Aid community without breaking the bank ● Research conducted could lead to bigger and better bridges
Our Recommendations ● Next step in the design process ○ Construction ○ Analytics ● Further investigations ○ Traffic study (construction and final) ○ Environmental impact ○ Community approval ● Taking action ○ Proposal
To Close. .