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Hello all, integrator Newmark $gamma $beta is there any command for using Explicit Newmark integrator ? I know opensees has this integrator but I don't find it in the website or manual. I know if beta=0, Newmark integrator become Explicit Central Difference but I don't know about Explicit Newmark in...

Hello engineers,

Can anyone explain for me what getTangent and getDampTangent exactly do ? when should they return to zero and when to return to any other value ? I'd like to have a general idea about those methods.
Thanks

Hello Selimgunay,

Thanks for the response. I think my problem is beam-column connectivity. I will appreciate if you could take a look at what I explained in the link below:

http://opensees.berkeley.edu/community/ ... =2&t=65132

I am not sure if I understand you correctly. If I define 3 nodes at j, how I can make sure the beam/column connection is rigid at the left side of the j and simple/hinge at right side of the j ?

Hello engineers I have a question about simple connection between beams and columns. Lets say I have a frame with 2 bays(spans). As I show below, i,j and k are the places for the columns which are connected with beam 1 and beam2. I want to have a beam between i and j (beam1) with rigid connection at...

Thank you Selimgunay.

Thanks!

Yes, the issue is coming from the new material for sure.

That’s right. I used beta = 0.5 and gamma = 0.25 and like you said there is no numerical damping.
Any idea why I have smooth reduction in my response while I don’t have any damping?

I am using Newmark method with gamma = 0.5, so there is no numerical damping, right ?
How can I be sure there is no numerical damping In my C++ code ? Is there any numerical damping in Viscous material source code ?

Hello engineers,

I am modeling 2D frame and I'd like to consider weak axis for one of the columns.
I am using Wsection file for the column properties. I know opensees consider the strong axis by default and wondering how to put weak axis for one of my columns ?

Hi Jhno,
I did not use Rayleigh damping for sure. I am not sure what you mean by numerical damping ?

Hello everyone, I created new material that resistance force is proportional to relative acceleration (something like ViscousDamper material that force is proportional to relative velocity). everything looks good. The only weird thing is when I do transient analysis,(sine pulse loading....), the str...

Hello everyone, I am trying to add new material in opensees using MAC(Not windows or Linux). I was able to create .dylib and use the exampe1.tcl for ElasticPPcpp( everything works just fine). When I want to add my own code, I could create .dylib (my new material) successfully but when I use the .dyl...

That exactly what I needed. Thank you