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London Bridges

Engineering Cohort. London Bridges. Bobbi Peery & Tom Wolfe Mustang Canyon Ridge Rhana Vickers Edmond Sequoyah Katherine Brooks Norman Whittier Jessica Wetherington & Ann Williams PC Kenneth Cooper Dr Chris Ramsmeyer – Mentor. Project Engineers .

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London Bridges

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  1. Engineering Cohort London Bridges

  2. Bobbi Peery & Tom Wolfe • Mustang Canyon Ridge • Rhana Vickers • Edmond Sequoyah • Katherine Brooks • Norman Whittier • Jessica Wetherington & Ann Williams • PC Kenneth Cooper • Dr Chris Ramsmeyer – Mentor Project Engineers

  3. Bridges come is different flavors

  4. Bridge parts have names

  5. Compression - Red Tension - Blue Members can fail many ways

  6. Lateral Torsional Buckling • aka twisting • Joints Bridges can fail many ways

  7. How does increasing the height of a bridge affect the stress on a chord? How does increasing the length of a bridge affect the stress on a chord? Getting down to business

  8. Westpoint Bridge Designer 2014 – Free! Models are most cost efficient

  9. Pasco Model Kit with Sensor • Cleaner data, decrease workmanship error, reusable Models are most cost efficient

  10. Next step - wood

  11. Build and test 3 bridges of increasing length. Predict the value of a 4th length Build and test the 4th length Compare predicted and actual value Wood is much more lifelike! The Plan

  12. Getting bridges to fail in the correct place is harder than we originally thought Using equipment correctly in key The real world is not as nice as analytical models Bass wood might look like Balsa wood, but does not break the same Lessons Learned

  13. How to graph in Excel Experimental data can not be altered! All data should go in lab book Lab books should be in pen – may be legal document Lessons Learned

  14. There are over 23,000 bridges in Oklahoma, including 6-7,000 highway bridges • As the length of a bridge increases, the stress (compression, tension) needed to break the bridge decreases • The relationship is power series • As the height of a bridge increases, the stress (compression, tension) needed to break the bridge increases • The relationship is a power series (negative exponent) Information that may come in handy when taking the post test questions

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