5.15.2. Nonlinear SDOF Models

Try these first

1. 1.

   What is a nonlinear SDOF model?

   Hint

   Think about how structures behave under large loads.

2. 2.

   Define hysteresis loop.

   Hint

   It reflects energy loss during loading and unloading.

3. 3.

   What does a hysteresis loop represent in structural analysis?

   • A linear relationship
   • Energy loss during loading
   • Constant strength

   Hint

   Look for the definition of hysteresis.

4. 4.

   True or False: Nonlinear SDOF models are designed to reflect real-world structural behavior during significant loads.

   • True
   • False

   Hint

   Think about what happens when loads exceed material limits.

5. 5.

   Given a building modeled as an elasto-plastic structure, describe how the hysteresis loop changes if the earthquake load exceeds the yield point.

   Hint

   Consider what happens when materials yield under stress.

6. 6.

   Design a simple rubber band model as a nonlinear SDOF system and explain how you would visualize hysteresis.

   Hint

   Look at how much energy is released when you let go.