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Thanks a lot for you guys' replies. I figured it out. The output should be something like:

[time] [axial def] [curvature 1] [curvature 2] [torsional...]

Thanks again.

Thanks for your reply. However, there are several items and the format of the output is like:

Time var1 var2 var3 var4

what's the meaning of those variables var1, var2, var3, and var4? Thanks.

What's the meaning of the section deformation output for the nonlinear beam column element?

Thank you very much for your reply. I am using nonlinear beam elements. I will check it out.

OK, I will try it. Thanks a lot for you guys's help.

Thanks a lot for you guys replies. Then, how can we know what value is good for the analysis?

From the manual, the tolerance is an absolute value (i.e, it is not a ratio, for example, for the force criteria, we set tol=0.1 means tol=0.1 N (SI units) ), right?

How can I recorder the curvature response of a member during transient analysis? Thanks.

Why so small?

Could anyone please give recommendations about how to set the convergence tolerance?