6.10. Comparison: Mass vs Base Excitation

Try these first

1. 1.

   Define mass excitation.

   Hint

   Think about direct forces on structures.

2. 2.

   What is an example of base excitation?

   Hint

   Consider natural events that affect structures.

3. 3.

   What governs the equation of motion for mass excitation?

   • Only internal forces
   • External forces on the mass
   • Ground movements

   Hint

   Recall the context of mass excitation.

4. 4.

   True or False: Base excitation is indirect and involves the structure's base movements.

   • True
   • False

   Hint

   Think about what base excitation means.

5. 5.

   A building is designed to withstand both wind and seismic loads. Discuss how mass excitation and base excitation influence the design criteria.

   Hint

   Think about how different loads affect design choices.

6. 6.

   Given the equation of motion for base excitation, how would an increase in ground acceleration affect the structural response?

   Hint

   Recall the implications of the EOM in response to increased acceleration.