December 27, 2020 at 12:22 am #3486
is there any simple example of p-delta analysis using OpenSees as a solver?
i did several try, but not succeed. in text mode editing are quiet easy to change at geomTransf options
regardsDecember 28, 2020 at 8:58 am #3487
please set, in Analysis options, Static, Non-linear and P-Delta options. Or, for other types of analyses, check “second-order” option.December 28, 2020 at 3:39 pm #3489
seems work only using Oofem solver, but not for Opensees. it will cumbersome with editing manually inside text editor. would it be much better supports? thank for interestMarch 3, 2021 at 10:57 am #3661
PDelta in opensees is managed by PDelta transformation, you should find this line in the TCL file.March 3, 2021 at 1:15 pm #3664
Attached a simple example I questioning, running these problem using built-in OOFEM solver working fine. However, it’s not works for OpenSees as solver when I switch in option menus.
Attachments:You must be logged in to view attached files.March 3, 2021 at 3:38 pm #3666
Yes we confirm this, thanks for reporting us. This will be corrected in the next minor update.March 4, 2021 at 3:04 pm #3672
Solved in v1.7p1, now available.March 5, 2021 at 12:49 am #3675
Updating to above versions are working now for OpenSees, however the results are too far. OOFEM solver has shown a consistent and correct answer, not in case using OpenSees solver. Try to understand the problem, I re-create the model then replicates, add loads manually and running. It shown my second duplicated models with manually define load combination are correct, not in case defining these combination trough menus.
Attachments:You must be logged in to view attached files.March 5, 2021 at 10:43 am #3682
Yes, it seems that you left the loadcases in the model set for LC1 also for non-linear cases. In Analysis settings, click on LC1, remove PDelta effects check and delete all the case you find in TH loadcases. Then re-enable Pdelta effects and store the changes.
There’ll automatic controls in future, thanks for reporting us.March 5, 2021 at 1:27 pm #3684
I follow as suggested above and it’s working properly now, automatic control for these task are good ideas to avoid something missed at important procedures. I can understand how it’s hard and difficult to implementation the compatibility of both solver (OOFEM & OpenSees). Many thanks for any effort, hopes NextFEM will growing better and be the best interface to bridging the gaps for these famous advanced solver.
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