JoshPlumSE
Structural
- Aug 15, 2008
- 10,341
Back in late 2021, we had this thread that discussed a feature in ETABS related to walking vibration.
thread507-489466
This thread prompted me to start an internal discussion on the topic here at CSI. I found that we were working on a new feature that would perform an analysis very similar to what is described in Brad Davis' research and in chapter 7 of AISC Design Guide 11 (2nd edition) talk about.
Personally, I'm embarrassed that I never followed up with the original thread. What can I say, we all get distracted by work... and life. But, better late than never.
I found out that the ETABS feature discussed in that thread was in fact using a triangular forcing function similar (but perhaps not identical) to the heel drop function shown in figure 1-7 of the design guide. I never got far enough into the discussion to determine exactly what the function was (sorry!).
I'm revisiting it now because this newer (and better) feature based on frequency response function is far enough along, that it triggered my memory and I looked up that old thread and the e-mail communications I had sent back then.
Being a bit of DG-11 geek, this new feature is something I'm pretty excited about, but I don't have a whole lot more information to give at this time.
Just an update that I've confirmed the basic shape of the forcing function used in the older feature discussed in that thread. And, that I'm trying to make sure that our new feature (and probably the older one as well) is better documented.
thread507-489466
This thread prompted me to start an internal discussion on the topic here at CSI. I found that we were working on a new feature that would perform an analysis very similar to what is described in Brad Davis' research and in chapter 7 of AISC Design Guide 11 (2nd edition) talk about.
Personally, I'm embarrassed that I never followed up with the original thread. What can I say, we all get distracted by work... and life. But, better late than never.
I found out that the ETABS feature discussed in that thread was in fact using a triangular forcing function similar (but perhaps not identical) to the heel drop function shown in figure 1-7 of the design guide. I never got far enough into the discussion to determine exactly what the function was (sorry!).
I'm revisiting it now because this newer (and better) feature based on frequency response function is far enough along, that it triggered my memory and I looked up that old thread and the e-mail communications I had sent back then.
Being a bit of DG-11 geek, this new feature is something I'm pretty excited about, but I don't have a whole lot more information to give at this time.
Just an update that I've confirmed the basic shape of the forcing function used in the older feature discussed in that thread. And, that I'm trying to make sure that our new feature (and probably the older one as well) is better documented.