Bridge Design, Testing Data and Efficiency

Testing Video




Calculation Of Efficiency

The given formula to calculate the efficiency of our bridge:



Our Bridge:






Discussion Of Bridge Design After Testing

What is your score on efficiency? If the efficiency is high/low, what went right/wrong?
Our Score is 193. Firstly, we felt that the bridge broke at the side as the weight was not evenly distributed. Secondly, the sides of the bridge might not have been securely glued, or positioned properly, thus causing a decrease in structural integrity, which resulted in the breakage at the side.

Which part of the bridge started to give way first? Explain using Physics or Engineering concepts.
The end of the bridge began to gave way first. This might be caused due to the joints being not as secure. In a bridge, the weight is distributed throughout, which means that there will be massive amounts of forces, such as tension and compression, all over the bridge. If certain joints are weaker, the weight will not be spread evenly, and will eventually lead to structural failure when the load starts to increase drastically.

Which part of the bridge provided the most strength during the testing process? Explain using Physics or Engineering concepts.
The truss frame. It was thick and able to resist a much higher weight (193x) of its own weight. This is because of the way the frame was constructed. The truss frame is made up of generally triangles, which is very efficient as they form up a rigid shape as compared to squares or any other feasible shape.


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