Operation Build a Bridge and Get Over It
Standard: Define a simple design problem reflecting a need or a want that includes specified criteria for success and constraints on materials, time, or cost
We have received several images from around the world showing bridge failure. Check out the photos here: CLICK HERE . There’s one in Madagascar, an island nation off Africa, another in Suriname, a republic in South America, one in Mississippi after a hurricane, and a collapsed metal bridge in Nebraska. While each bridge collapsed (engineers say “failed”) for different reasons, the main cause always comes down to one thing. Share with your partners what you think may be the general cause for structural failure. The main culprit is that the bridges are no longer able to support the weight placed on them.The city of Powder Springs requests that our team conduct a special mission to redesign and construct a bridge that will resist collapsing. We will use our understanding of the steps of the engineering design process to achieve the mission goals. The operation name is “Build a Bridge and Get over It.”Your mission, which you must accept, is to design and construct a bridge for Powder Springs that will have a high strength-to-weight ratio. As always should any member of your IMF force be caught, the secretary will disavow any knowledge of your actions. This tape will self-destruct in five seconds. Good luck class.
compression: The squeezing or pushing (force) on a material, which tends to make it shorter.
dead load: The weight of a structure by itself when fully constructed.
ratio: A comparison of the size of one number to the size of another number.
shear: The sliding of material that causes layers to move in opposite directions.
tension: The stretching or pulling (force) on a material, which tends to make it longer.
truss: A structural frame based on the rigidity of the triangle shape and composed of straight members. Functions as a beam to support structures such as bridges and roofs.
S/SCIENCE: Research several engineers that construct bridges
T/Technology: Design your bridge using “Bridge Building Design” program
E/Engineer: Construct (build) your bridge using toothpicks
M/Math: Calculate the strength-to-weight ratio of their final designs.