What is/are the challenge(s) for building the foundation of the Rio–Antirrio Bridge?
-The seabed is too hard to drill.
-There are sand and silt on the seabed.
-It costs too much to build the foundation.
-All of above.
How did the engineers manage to stabilize the foundation without sinking while earthquake?
-Placing piles in the bedrock.
-Placing piles above the sea level.
-Placing piles above the sand and silt
-Placing piles in the sand and silt.
What is NOT the feature of an earthquake proof bridge pier?
-It is hollow.
-It is made of steel.
-It can move freely.
-Part of it is built underwater.
What is an example of a “Predictable failure”?
-Pistons will "lock" when the bridge is experiencing earthquake shakes
-Multi-span cable on the deck
-Easy open aluminum can