Hi;
I am s PhD student in Earthquake Engineering. Now, I work on the development of seismic fragility curves for bridge piers. For this, I use IDA method by using OpenSees tool.
For this, I calculate maximum drift for each PGA by considering different ground motion (using IDA: Incremental Dynamic Analysis).
Can you explain to me in detail the plot of the curve (PSDM) to better understand!
I appreciate your help.