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Besides the question above, I have another question. Does the below code mean that coefficient alphaM and betaKcomm will be updated in every time step? ################################## set xDamp 0.02; # damping ratio set MpropSwitch 1.0; set KcurrSwitch 0.0; set KcommSwitch 1.0; set KinitSwitch 0....

Hello, I have some problem in specifying damping. defining rayleigh damping consists of four parameters, $alphaM $betaKcurr $betaKinit $betaKcomm; The first three parameters can easily be understood but I don't know the difference between $betaKcurr and $betaKcomm; Can anybody help me? Thank you ver...

Dear sajad.gh
Thank you for your help!

OpenSees2.2.2
Visual Studio 2010

I need to mention that my process was not exactly the same as what you described in 24 steps, the dll file was successfully created only by the first 20 steps.

Vesna, Thank you for your reply ^^

I found it works, but I have a new demand, that is to get rid of the tensile part , I hope you know how to do it ^^

Thank you for your reply~~

Hello, is there anyway to define a nonlinear bilinear tension only material without energy dissipation? Dr. Silvia has told me that using selfcentering material with a beta of 0 is able to get a nonlinear bilinear behavior

Thank you in advance!

Vesna, thank you for your reply Actually my question is how to model the transverse reinforcement. In my opinion, hoop bars can't be directly modeled in a 1 demensional element, so I tried to express the effect of hoop bars by adjusting the strength of core concrete due to the confinement of hoop ba...

Thank you for your reply, I tried but the new command still can't be recognized

Hello Frank, I followed your 24 step instruction and successfully made the dll file (by visual studio 2010). The problem is it fails in the test. The new command (WARNING could not create uniaxialMaterial ElasticPPcpp) can't be recognized by opensees. you said: 25. using windows finder, copy the .dl...

There's another question. Is there any ways to make this material without tension capacity?

Hello, I am trying to perform two pushover analysis of two columns with different transverse reinforcements. A single force based element is used for these two columns respectively and uniaxial concrete and steel material are used for longitudinal reinforcements. The problem is I don't know how to m...

Hello, I'm doing an simple analysis of prestressed concrete beam. The typical hysteresis of prestressed concrete element is "S" shape. However, I can't find any material relative to the constitutive model of prestressed concrete in the user manual. Is there any such model or if there is another way ...

Thank you Dr. Silvia, I'll try it~

Hello, I'm tried to find a bilinear or trilinear model in which the unloading path is exactly the same as the reloading path but I couldn't find it in the manual. I tried elasto-plastic model but it has similar hysteretic behavior as steel.

Anybody knows such a simple model?

Thank you!