32.12.1. Bridges

Try these first

1. 1.

   What is the primary purpose of expansion joints in bridges?

   Hint

   Think about how temperature changes affect structures.

2. 2.

   What do bearings do in bridge design?

   Hint

   Consider the role of friction and support.

3. 3.

   What is the purpose of expansion joints in bridges?

   • To prevent flooding
   • To allow for movement
   • To provide aesthetics

   Hint

   Remember their function related to movement.

4. 4.

   True or False: Bearings do not allow any movement in a bridge construction.

   • True
   • False

   Hint

   Consider how forces affect structures.

5. 5.

   Design a simple model of a bridge incorporating expansion joints and evaluate how they would react during a seismic event.

   Hint

   Draw it out to visualize movement.

6. 6.

   Discuss how the choice of bearing type affects the structural integrity of a bridge during seismic forces. Analyze a specific material.

   Hint

   Consider properties such as flexibility and damping.