Hi,

yes,

case 1:

pipe connected with shoe or trunnion and shoe or trunnion is just rested in spring can top.spring can bottom is welded or bolted in structure or foundation.

at node 20 bottom of spring can,we have to input except y direction all other degree of freedom is arrested.so Rx,Ry,Rz,x and z is arrested.

case2:
some time pipe connected with shoe or trunnion and shoe or trunnion is rigidly connected with spring can top.spring can bottom is just rested in structure or foundation.

at node 20 bottom of spring can,we have to input except y direction with friction and all other degree of freedom is free.