5.4.5. Assumptions in SDOF Idealization

Try these first

1. 1.

   What does SDOF stand for?

   Hint

   Think about how many movements it considers.

2. 2.

   Why do we assume that floors are infinitely rigid?

   Hint

   Consider the impact on analysis.

3. 3.

   What does 'infinitely rigid' mean in the context of building analysis?

   • Floors have significant deflections
   • Floors do not deform
   • Floors deform minimally

   Hint

   Think about how rigidity affects behavior during loads.

4. 4.

   True or False: SDOF systems only consider vertical displacement during seismic analysis.

   • True
   • False

   Hint

   Consider the effects of earthquakes.

5. 5.

   Consider a building modeled as an SDOF system. Discuss the implications of not accounting for local deformation in the design phase. What problems could arise?

   Hint

   Think about the significance of detailed analysis in the real world.

6. 6.

   Analyze a scenario where a structure experiences both lateral and vertical seismic forces. Explain how the assumptions in SDOF idealization might limit the understanding of the building's performance.

   Hint

   Reflect on scenarios involving taller or more flexible structures.