Austin Key and Jacob Stephens
Overview
Our goal was to create a
bridge that would hold considerable weight while remaining efficient. The bridge had to be 12” long, 4” wide, and
1.5” tall. Instead of rebar we used 2
welding wires twisted together. Once the
mold for the bridge was created, we would mix concrete, pour, then test the
bridges using the structural stress analyzer, after a couple days of drying.
In creating our bridge,
Austin and I followed the 12-step engineering model;
beginning with brainstorming. We threw a
bunch of ideas and sketches down onto paper, and then we researched real
reinforced concrete bridges. This
allowed us to make a confident choice of which brainstorm to pursue bringing to
life. We refined our design and noted the
measurements. Then Austin assembled the
wooden box our bridge would dry in while I formed our foam molds.
Our bridge unfortunately broke while we were
removing it from the mold, as did many other groups’ bridges because we were
using expired concrete. We never got to
test the strength of our bridge.