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Awesome Arch

Awesome Arch. By Cambridge Dragons Teyahnie DonaRaye Malika Clara Claudia Helped By Shannon andLuba. Overview. Goals Design Process Prototypes Final Design Building Math and Science Types of Bridges . Decide on topic and final design Work as a team

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Awesome Arch

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  1. Awesome Arch ByCambridge Dragons Teyahnie DonaRaye Malika Clara Claudia Helped By Shannon andLuba

  2. Overview • Goals • Design Process • Prototypes • Final Design • Building • Math and Science • Types of Bridges

  3. Decide on topic and final design Work as a team Learn woodshop and computer skills Finish on or ahead of time Stay within budget Goals

  4. Design Process • Brainstorm • Optical illusions • Amusement park • Bridges • Topic selection • Talk with client • Types of bridges • Suspension • Arch • Cable Stay • Draw • Truss • Research/prototypes

  5. Prototype #1 • Paper bridges • Invented different bridges to test strength

  6. Prototype #2 • Cardboard • To figure out dimensions relative to exhibit space

  7. Prototype #3 • Wood • To experiment with large model • To get accustomed to working with wood

  8. Prototype #4 • Foam • To test our own shapes of arches • To prototype the actual bridge

  9. Final Design • A flat-topped arch that kids can assemble and walk on • Pictures of famous bridges • Text about the forces acting on bridges

  10. Some Bridge Vocabulary • Abutment: A concrete structure used for support at either end of a bridge, receiving the thrust from the ends of an arch. The abutment resists the compression from the arch. • Arch: A curved structure which supports weight at its center by distributing compression down to the ground at its end. • Compression: The effect of a force, which tends to shorten an object in the direction of the force. • Keystone: The central wedge-shaped block at the top of an arch that holds the other pieces in place. • Tension: The effect of a force, which tends to lengthen an object by pulling it apart.

  11. Construction Steps Sketches and Hand-drawings Learning to use tools Paper and foam models Cutting, sanding, assembling, staining pieces Materials Maple Appleply wood Nails, screws and glue Stains and polyurethane Building and Materials

  12. Working in the Woodshop • Transfer design to wood and cut with saber saw. • Assemble pieces with drills and the screw guns. • Hand and power sanding to smooth edges and sides.

  13. Final Steps • Attach supports to base. • Color stain each piece. • Build the centertemplate.

  14. Math We’ve Learned and Used • Fractions • Drawing to scale • Angles • Volume + Area • Calculated circumference p= 3.14 • r= radius • Circumference = 2pr

  15. Science • Forces • Force = Mass x Acceleration • Tension • Compression • Load • Material Science • Modulus of Elasticity • Failure/Fracture

  16. Dimension design using AutoCAD

  17. Examples of Bridges • Arch • Suspension • Cable Stay • Truss • Drawbridge

  18. Arch Bridge • Can be combined with other types • Each piece of an arch is used to support the load • An arch uses the force of compression

  19. Suspension Bridge • Spans long distances over water • Cables act in tension to support the load • Cables connect from the bridge deck to the main cables

  20. Cable Stay • Spans long distances • Cables connect from the bridge deck to the towers • Cables act in tension to support the load • Towers act in compression

  21. Truss Bridge • Members act in both tension and compression • Triangles are the main shape • Is combined with other bridge styles

  22. Drawbridge • Trusses are the main shape • Movable decks to allow ships to pass • Shorter towers used • Spans short distances

  23. Special thanx to….. Chris Geoff Janet Louise Glenn Denise Ioannis Bob Shannon Luba Haruna Peter

  24. ? ? ? The End ? Any Questions? ? ?

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