wipeAnalysis command

[Ella]

Hi,
When we use "wipeAnalysis" it destroys all components of the Analysis. Now imagine we have performed a gravity analysis with using "LoadConst" command, and then a pushover analysis. What would happen if we use wipeAnalysis in this case? does the result of both gravity and pushover analyses become clear (Regardless the command LoadConst that we use after gravity analysis)?
thanks a lot.

[fmk]

OpenSees separates the Domain and the Analysis. The domain holds the state of the model at the last converged step and current trial step, i.e. current time, ,nodes (coordinates, displ, vel, accel), load patterns (loads, factors), elements (and materials and their state) ,and constraints. The analysis objects simply move the model from one converged state to the next. When you remove the analysis objects the domain stays in exactly the same state as it was in at the end of the last analysis step.

the analysis and loadConst are totally separate. loadConst simply tells every load pattern in the current domain to use the current load factor (obtained from the timseries) from then on and if the -time option is provided it also tells the domain to set its time to the time provided.

[Ella]

Thanks a lot for your detailed explanation. But I still don't understand what you mean by "when you remove the analysis objects the domain stays in exactly the same state as it was AT THE END OF THE LAST ANALYSIS STEP". Could you explain a bit more please? Dose it mean that when we use wipeAnalysis command, it doesn't put model in the state that it was BEFORE analysis? I was used to thinking that this command is like the "unlock button" in SAP2000. Thanks a lot.

[fmk]

the domain DOES NOT GO BACK TO ANY PREVIOUS STATE.

why don't you actually try an analysis and see what happens!

[Ella]

I really love your way of teaching! using CAPITAL LETTERS in your last post was also interesting!! Thanks a lot...

[Tas]

I am not sure if it helps, but i will just add a similar "option" of this issue...
http://opensees.berkeley.edu/community/ ... =2&t=53954

[Ella]

Thank you dear Tas...