I would like to receive feedback about the benefits of including friction of supports in dynamic analysis - from analysts experienced in this.

A view I have heard is that including a factor for damping is sufficient and hence you do not need to include for friction while doing dynamic analysis.

My issue is that for large diamter piping (> 24" dia.) the friction force (assuming coefficient of 0.3) at the supports can be quite significant in magnitude and should be significant in reducing the dynamic forces and DLF (dynamic load factor)in say a Response spectrum analysis for a hydraulic hammer case.

hoping for a quick feedback.

Hi Richard, Dave,

Appreciate any feedback on this issue.

check out a second current topic on same by Pete_Chandler under:
Should Friction Be Turned Off for OCC?
Not much more I can add.