1. why in operating case stress check is not done by caesar ( why it is not a standard stress case) . during ope case suppose if the pipe lifts up the stress increases in the pipe then why the stress is not checked. in the exp case the stress is calculated only with the difference in the displacement and it is not actually an analysis.

1) This is not a "poll", it is a normal "post". Please use "post" instead of "poll" for these types of issues.

2) On the "operating stress" issue, please read this post , which can be found in this Forum using the [Search] facility above.