The OpenSees Community

Dear Silvia,
I have built the opensees version 2.1.0 from the stable source code using Visual studio 2005. I have got 1324 warnings and no errors. I have run an example problem using this binary and compare the resulsts with the published opensees binary. Both these results compare exactly with earch other. I have the following queries:

1) Why OpenSees binary (size 11764 kb) built by me is larger in size than the published OpenSees(size 7291 kb)?

2) A simple problem is taking 2 sec to complete in published binary while it is taking 10 s in case of binary built by me?

3) Can I ignore the warning messages>

4) What software are you using for building purpose?

Thanks,
Subrata

Hi fmk,
Could you please tell me where can I find source code for parallel computing?

Thanks,
Subrata

Hi,
can anybody please tell me if pserver to download source code via CVS is working now ?

Thanks,
Subrata

Hi,
Can any body tall me how to download source code via CVS. I am using DOS cell in windows xp and followed the procedure mentioned in the following link

opensees.berkeley.edu/OpenSees/developer/cvs.php

I have installed tortoise CVS.

When I tried to connect the server it gave the following error:

"connect to opensees.berkeley.edu:2401 failed: A connection attempt failed because the connected party did not properly respond after a period of time, or established cnnection failed because connested host has failed to respond."

Please help
thanks,
Subrata

Hi,
Can anybody tell me where can I find materials on parallel computing workshop 2008. The following link in the parallel computig site of opensees is dead.

opensees.berkeley.edu/OpenSees/workshops/parallel/Agenda.htm

Thanks,
Subrata

Hi,
I am using pressureDependentMultiYield material to model soil in OpenSees Version 2.1.0. In this model I am updating the material property. The model is running perfectly. However it is showing the following warning message:

PressureDependentMultiYield::setParameter() updateMaterialstage
PressureDependentMultiYield::bulkModulus
PressureDependentMultiYield::setParameter() - Found

Can anybody tell me how can I stop those messages?

Thanks,
subrata

Thanks Avytin. I am using nDmaterial elastic where only modulus of elasticity E and poisson's Ratio have to be specified. In that case what should I do?
Thanks,
Subrata

Hi,
I have analyzed soil-pile interaction problem using OpenSees Version 2.0.0. When I run the same tcl file in Version 2.1.0 I have got different results.

Can anybody tell me what are the basic differences in these two versions?

Thanks,
Subrata

Hi,
I am analyzing soil-pile interaction problem in OpenSees 2.1.0. In this version mass density definition in quad element is excluded. Therefore, I have to define nodal mass using -mass command to consider soil mass during dynamic analysis. However, it is cumbersome to define nodal mass since I have 5000 elements in my model and also sizes of quad elements are varying.

Is there any simple command in OpenSees Version 2.1.0 which can be used to consider soil mass?

Thanks in advance,
Subrata

Hi,
I am performing dynamic analysis of a rectangular (150 m long and 100 m height) soil strata using PressureDependentMultiYield material with “fluidsolidporus” material. I have applied equalDOF constraints at the two lateral boundaries. Dynamic analysis is performed (under undrained condition) after the gravity analysis. If I apply acceleration at the base of the model, pore pressure ratio in soil increases gradually from zero to 1.

However, when I am using horizontal dampers at the two lateral boundaries (to model radiation damping) pore pressure ratio exceeds 1 and goes upto 5. Moreover, in this case pore pressure ratio crosses the value 1 even before liquefaction occurs (that can be found from confinement pressure vs shear stress diagram). In some cases, soil elements are not liquefying but the values of pore pressure ratio reaches 1.

Can anybody tell me why I am not getting correct pore pressure ratio?

Thanks in advance,
Subrata

Hi,
I am doing a gravity analysis of a sigle bay single story frame where the support two nodes (1 and 4) are fixed in all directions.

fix 1 1 1 1 1 1 0
fix 2 0 0 1 1 1 0
fix 3 0 0 1 1 1 0
fix 4 1 1 1 1 1 0

After the gravity analysis I want to remove the vertical boundary condition at node 4 by remove command

remove sp 4 2

Now for static equilibrium I have to replace the vertical restrain by reaction force (20 kN) I have got from previous gravity analysis.

pattern Plain 2 Linear {
load 4 0 20 0.0 0.0 0.0 0.0
}

Do I have to again do the gravity analysis for the application of the reaction?

Please help

thanks in advance,
Subrata

Thanks Silvia.
Let me simplify the model.
I have a simple 2DOF system and I want to dyamic analysis of this system by applying two different cyclic force along two DOF. What are the commnads in OpenSees for such simple solution?


Thanks in advance.
Regards,
Subrata

Hi,
Can anybody tell me how to do dynamic analysis in Opensees by applying multisupport excitation in terms of force (not acceleration, vel or dis).

Thanks in advabce,
Subrata