You can see that the model has small masses on the cables,
along the bridge,
(See a close up) and on the towers. (Why?)
Different tests were done on the model to investigate how
the whole bridge would
vibrate during an earthquake. It was mounted on the shaking-table
and tested for different earthquakes.
The movement of the structure was recorded using accelerometers.
The results were used to check a computer
simulation of the bridge (Why?).