Load It Up!
Students take a hands-on look at the design of bridge piers (columns). First they brainstorm types of loads that might affect a Colorado bridge. Then they determine the maximum possible load for that scenario, and calculate the cross-sectional area of a column designed to support that load. Choosing from clay, foam or marshmallows, they create model columns and test their calculations.
Students learn about the design of bridge piersCopyright Wikimedia Commons http://commons.wikimedia.org/wiki/File:Decatur,_Nebraska_Missouri_bridge_W_concrete_pier.JPG
The engineering design process begins by thoroughly understanding the problem to be solved. Once all aspects of the problem are understood, engineers explore many possible design solutions to determine the one that best meets all the objectives. Performing a load analysis helps engineers determine how to design a structure that is strong enough and what types of materials to use. Engineers also keep in mind how material choices may affect construction speed and cost.
After this activity, students should be able to:
- Describe the process that an engineer uses to design a bridge, including determining loads, calculating the highest load, and calculating the amount of material to resist the loads.
- Use appropriate calculations to model pier (column) design in a bridge.