Bridge Report

Team Total Domination

Outline

Introduction…………….. Zach Chaviers

Prototype……………….. Ali Nikkhah

Final Design……………. Bobby Schneider

Conclusion……………… Derrick Wang

Introduction Prototype Final Conclusion

Problem

Build most efficient bridge

Efficiency:

Limited to 125 tongue depressors

Introduction Prototype Final Conclusion

bridge

load

mm

Background

Warren Truss

Component testing

Four-step process

Introduction Prototype Final Conclusion

Prototype Design

3 preliminary designs

Criteria for design

• Simple

• Triangle-based

• Allow for easy layering

Introduction Prototype Final Conclusion

Construction

Warren Truss design used

Built quickly

Main goal: test structure

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Before Testing

Introduction Prototype Final Conclusion

Test

Stable load increase

Bent at joint

Support popped out

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Test

Introduction Prototype Final Conclusion

Results

Max load 397 pounds

Efficiency: 630

Joints weak

Introduction Prototype Final Conclusion

Final Design

Fix weaknesses

• Joints

• Glue type

• Precision

• Symmetry

Introduction Prototype Final Conclusion

Construction

Graph paper

Clamping

Glue Coating

Introduction Prototype Final Conclusion

Before Testing

Introduction Prototype Final Conclusion

Completed Final Bridge

Test

Stable load increase

Twisted

Did not break

Introduction Prototype Final Conclusion

Test

Introduction Prototype Final Conclusion

After Testing

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Dead Bridge

Results

Max load 811 pounds

Efficiency: 1080

71% more efficient

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Summary

Truss Design

Prototype performed well

Minor changes made

Improved performance

Introduction Prototype Final Conclusion

Improving Final Design

Stabilizers created rectangles

Add triangles to prevent twisting

Introduction Prototype Final Conclusion

References

http://cee.carleton.ca/Exhibits/Tacoma_Narrows/

http://www.nwrain.com/~newtsuit/recoveries/

narrows/narrows.htm

http://www.bridgemeister.com/pic.php?pid=839

Introduction Prototype Final Conclusion

Any Questions?

Team TOTAL DOMINATION

Ali Nikkhah

Zach Chaviers

Derrick Wang

Bobby Schneider