Hi dear frank
in the middle of dynamic analysis (t=t0-dt) i remove domain load patterns and rivert it to start state .
it has no displacement at t=t0 but at t>t0
it's displacement not equal to zero !!!
why ?
I use codes like this
.
.
.
if(t==t0-dt)
{
theDomain->removeLoadPattern(1);
theDomain->revertToStart();
}
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.
.
i am not quite understading what is is you are asking .. if you invoke revertToStart on the domain the nodes, elements should go back to their original condition and all nodal displacements should be 0.0 .. you could do a Print on the nodes to check this.