The OpenSees Community

Hi everyone,

I am using the OpenSees version 2.4.0, but I want to use the newest version, how can I replace the current version with the new one, such that that works well with tcl? Is it also needed to download a new version of Tcl which is consistent with the last version of OpenSees? I downloaded the last version and its executive file replaced with the current one, but it did not work. I would be grateful, if anyone could help me.

Hi everyone,

I use the OpenSees 2.4.0 version, but and I want to use the new version of OpenSees. I downloaded it from the website, but it is not jointed with Tcl, I mean when I run Tcl, the version that is shown is still 2.4.0. How can I execute the new version of OpenSees with Tcl?

Thanks

Is there anyone who can help me?

Hi everybody, in OpenSees, is it possible to model a rigid block on a rigid ground such that there is a sliding interface between them with a coefficient of friction and then analysis of the model under an earthquake? If yes, please guide me in this regard. Thank you very much.

Hi everyone,

Is there any multi-linear material in OpenSees that only considers the compression behavior? if no, is there any way to model such a material?

Thanks

Hi everyone,

I have a question about the MultiLinear Material. According to the following link, in the unloading step, the value of stress for the forth node is shown 2f1, while in the explanation of the command, we can assign any value as stress for the forth node, namely f4. I am confusing which should be assigned?

https://opensees.berkeley.edu/wiki/inde ... r_Material

Thanks

Hi everyone,

I have a question about the Hysteretic material. Three nodes should be defined to model this material ($e1p, $s1p) , ($e2p, $s2p) , ($e3p, $s3p), is it possible to define more than three nodes for this material, such that we can define 4 or 5 nodes to simulate this material?

Thank you.

Hi everyone,

Is there any way to model the modified-Clough material in OpenSees?

Thank you.

Hi everyone,

I modeled a SDOF system with the RambergOsgoodSteel material, but when I want to conduct a nonlinear time history analysis under an earthquake, the following message appears:

WARNING could not create uniaxialMaterial RambergOsgoodSteel

I would be really grateful, if anyone could help me in this regard.

Is there anybody who can help me in this regard?

Hi everyone, What values have to be considered for the parameters the Hysteretic material to convert it into the Takeda material? I mean for the parameters pinchx, pinchy, damage1, damage2 and beta, such that the Takeda material is obtained.

Thanks

HI everyone, I have a question. In a time history analysis of a MDOF system under a ground motion with the duration of 20 sec, is it possible to stop the analysis at t=10 sec and read the displacement and velocity at existing masses of the system at that time, then change them to desired values and apply them as initial conditions to the system for conducting time history analysis of the structure under another earthquake? I would be grateful, if anybody could help me in this regard.

Thank you very much. What values have to be considered for the parameters of pinchx and pinchy in this regard?

Hi everyone,

Considering that there is no Takeda hysteretic model in OpenSees, how can I assign such a hysteretic rule to a SDOF system using OpenSees?

Thanks

selimgunay wrote: ↑Sun Oct 18, 2020 10:42 am Did you add the model builder to the beginning of your script: model BasicBuilder -ndm $ndm <-ndf $ndf>

Yes, I did.
model BasicBuilder -ndm 2 -ndf 3;