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A Bridge to Somewhere

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18 diapositives · 392 Views · Oct 10, 2014

A Bridge to Somewhere. Your task You are a member of small company that is competing against other regional companies for the right to build a cement based bridge span for a pedestrian walkway over a creek on your school campus. Outcomes of project.

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A Bridge to Somewhere
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  1. A Bridge to Somewhere

  2. Your taskYou are a member of small company that is competing against other regional companies for the right to build a cement based bridge span for a pedestrian walkway over a creek on your school campus.

  3. Outcomes of project • You will construct a bid using resources available to you in the classroom. • Your bid must include time and cost of materials that you use in your bridge/span • Your final submission to be considered for the winning bid will cover a 2ft span and support 30 pounds. You must submit your bid with your structure. • The winning bridge/span will be one that is the most cost effective and meets specifications.

  4. Requirements • Each team must construct a minimum of 3 separate spans. • For each span, your must include: a. Materials (type and quantity) b. Cost & Time c. Data (stress test, weight of span, other structural observations) d. Visual representation of data e. Summary evaluation of each separate span

  5. Prior Teaching Safety: Proper use PPE’s Vocabulary: Composite Tension Stress Strain Distortion Bid Engineering Prior knowledge: Principles of material science, characteristics of concrete, uses of concrete

  6. Young’s Modulus • Definition: How much something is going to stretch • It was very difficult to measure in this lab! • The control and burlap did not flex at all. • The welding rods flexed, but when do you measure?

  7. Bridge Designs

  8. Discussion Questions • How does the design of the bridge affect the load carrying capacity? • How does the distance of the span affect the engineering of the bridge? • What might cause a bridge to fail? • How does the design of the bridge affect the materials used in the making of the bridge?

  9. Teacher Resources • http://elearning.vtu.ac.in/16/ENotes/ConcreteTechnology/Unit5-NS.pdf • http://www.cee.mtu.edu/~llsutter/classes/cet1141/pdf/mca1.pdf