6.18.2. Incremental Dynamic Analysis (IDA)

Try these first

1. 1.

   What does IDA stand for?

   Hint

   Think about the first letters of each word.

2. 2.

   Why do engineers use IDA?

   Hint

   What can we learn from different earthquake magnitudes?

3. 3.

   What is the primary purpose of Incremental Dynamic Analysis (IDA)?

   • To assess structural aesthetics
   • To evaluate seismic performance
   • To optimize material cost

   Hint

   Think about the area of engineering concerned with earthquakes.

4. 4.

   True or False: IDA can help identify the performance of a structure at various seismic intensities.

   • True
   • False

   Hint

   Reflect on what IDA assesses.

5. 5.

   You are tasked with analyzing a 10-story building using IDA. Assume you apply scaled seismic motions and notice that it begins failing at a scale of 1.5. What design changes would you recommend to prevent failure?

   Hint

   Think about what aspects of the structure would be weakest under increased load.

6. 6.

   Develop a theoretical framework for using IDA to assess an existing building against retrofitting options. What analysis steps are necessary?

   Hint

   Focus on the sequence of actions required for analysis.