About dynamic time-history curve

[cicilixiaoran]

Hello everybody!
when I conduct dynamic time-history of cantilever column, the maximum analysis time is defined 10 second，but when the time is 2.48 second, the dynamic time-history curve calculated is a straight line parallel to X axis up to the tenth seconds. Why is this? Thank you!

[vesna]

What do you mean by dynamic time-history curve? What is the value after 2.48 sec?

[cicilixiaoran]

Dear vesna, Thank you very much for your reply.
Yes, after 2.48 sec the value(displacement) is constant. And the dynamic time-history curve(displacement-time) is a straight line parallel to time axis from 2.48 sec to 10 sec.
I don't know how to upload pictures of dynamic time-history curve. Thank you!

[vesna]

Sorry for the late reply. We had winter a break.

I've never seen something like that. Would you post your code so I can test it?