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Bridges

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  1. Bridges Brian Brenner Aaron Levine Cindy Tran

  2. Some Uses of Bridges • Walkways • Highways/Roads • Railways • Pipelines • Connecting lands • Crossing rivers and canyons

  3. Types of Bridges • Arch • Truss • Cantilever • Cable-Stayed • Suspension

  4. What makes a bridge stay up? • Forces • Compression – a pushing or squeezing force • Tension – a pulling or stretching force • Demonstration • Make groups of two…

  5. Arch Bridges • Keystone – the wedge-shaped stone of an arch that locks its parts together • Abutments – the structures that support the ends of the bridge

  6. Arch Bridges • Works by Compression

  7. Arch Bridges • Where have you seen these bridges?

  8. Cold Spring Arch Bridge, Santa Barbara, CA

  9. Marsh Rainbow Arch, Riverton, KS

  10. Pont du Gard, Nimes, France

  11. Cable-Stayed Bridges • Piers – the vertical supporting structures • Cables – thick steel ropes from which the decking is suspended • Decking – the supported roadway on a bridge

  12. Cable-Stayed Bridges • Works by Tension AND Compression

  13. Cable-Stayed Bridges • Where have you seen these bridges?

  14. Zakim Bridge, Boston, MA

  15. Sunshine Skyway Bridge, Tampa, FL

  16. Sundial Bridge, Redding, CA

  17. Suspension Bridges • Similar to Cable-Stayed • Different construction method

  18. Suspension Bridges • Works by Tension and Compression

  19. Suspension Bridges • Where have you seen these bridges?

  20. Golden Gate Bridge, San Francisco, CA

  21. Brooklyn Bridge, Brooklyn, NY

  22. Verrazano-Narrows Bridge, New York, NY

  23. Other Types Truss Southern Pacific Railroad Bridge, Tempe, AZ Cantilever Firth of Forth-Forth Rail Bridge, Edinburgh, Scotland

  24. Engineering • Engineering – the use of math and science to solve real world problems (like crossing a river) • Civil engineering – designing and building bridges, roadways, tunnels, buildings, dams, etc. Civil Engineer

  25. Branches of Civil Engineering • Structural – bridges, roads, buildings • Geotechnical – foundations, excavations, and tunnels • Transportation – roads, traffic control, airports • Environmental – human impact on the environment

  26. Other Types of Engineering • Mechanical – design machines and moving parts • Electrical – design electrical equipment • Chemical – design processes for mixing chemicals • Computer – design computer hardware and software

  27. Questions?