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Happy New Year,everyone.I want to analyze a column (2D plane strain quadUP element) of saturated, undrained Pressure Dependent material subjected to earthquake,and I built the model according to Zhaohui Yang's example.As the sand is loose and the earthquake is strong,I think it should have large ver...

I have never used OpenSees Parallel,could anyone tell me how to do it step by step?

I have download the mpich2 and install it ,then what do I need to do?

Some examples could not work in the new versions.Does anyone has some versions earlier than 1.7.3?

Some examples could not work in the new versions.Does anyone has some versions earlier than 1.7.3?

Hello,kyonten.As you suggested,I used 1/8 the element and applied cyclic deviatoric stress at the top surface of the specimen。Just as I expected,the pore pressure generated ,but the displacement seemed abnormal as it was almost zero .Could you please have a look at it and give me some advices? Thank...

[quote="kyonten"]I don't think you are simulating a cyclic CU test if you are applying motion at the base. You should be applying cyclic deviatoric stress at the top surface of the specimen after the isotropic consolidation step. The consolidation step is done under drained condition while the shear...

I want to simulate a consolidated undrained cyclic test,first it is consolidated with 100KPA pressur,then a sine motion is assigned .I made some changes of other's code.But the results weren't prpper.Because the pore pressure was not accumulated with time,could someone have a look at it ? wipe logFi...

Element: quadup
in gravity application , the constrain is fix 1 0 0 1
in next stage ,I want to let it to be undrained,do I just chang it to
fix 1 0 0 0
it seems that doesn't work,how could I change the constrains?

I don't konw how to simulate the triaxial test in opensees,could anyone give an example of triaxial test?

Hello,have you known how to simulate triaxial test and could you tell me how to do it

Avytin,can you tell me your Email?I want to seek some help from you .

I want to know how to get the patameters of PressureDependMultiYield materal,so could anyone tell me the relation between the parameters and the results?

For: New eleNodes command to return nodes at an element. (eleNodes eleTag?)

Could you show a commad example?

element: quadup
record command is :recorder Element -file stress -ele 10 -time force

the data is :
5000 0.844802 7.01205 0.0002325 -2.2182 7.69875 0.0002675 -1.5315 2.79795 -0.0002325 1.5315 2.11125 -0.0002675

Who can tell me what is the meaning of the data?The first is time .

in the command manual,FourNodeQuadUP Element,the is a note: The valid queries to a quadUP element when creating an ElementRecorder are 'force', 'stiffness', or 'material matNum matArg1 matArg2 ...', where matNum represents the material object at the corresponding integration point. I try the command...