The OpenSees Community

Hi everyone,

May the structural model be modified after starting the calculations? For example, I build a 2D frame, I apply the loads and after that I want to add another element to the frame. Is that possible?

Thanks,
Alberto

Hi everyone, Is it possible in OpenSees to change a certain material for another while running an analysis? How? For example, if I have "Steel02" for the reinforcement behavior and, because of bending at a certain load level, a bar it's supposed to have already buckled, can I change the ma...

Thanks for your answer, fmk! But I'm afraid 'forceBeamColumn' doesn't converge either. Actually, when I use DisplacementControl as integrator, I always use 'dispBeamColumn'. Everyone says that 'forceBeamColumn' is more accurate and leads to convergence quickly, but my experience is that it hardly ev...

Hello everybody, I'm modelling an end-fixed concrete column with 'dispBeamColumn' ('nonlinearBeamColumn' leads to convergence issues) elements in 2D. Since the column is monotonically, horizontally loaded at top, I used a displacement control integrator. The model is more rigid than the original exp...

Hi everyone, I'm concerned about how many fibers should I use in a concrete section in order to achieve good results. In one of the last webinars, "Advanced Scripting Tips and Techniques", Mr McKenna recommended using a very little number of fibers (e.g. 4x4 for core, 4 for each side of co...

It worked! Thank you so much!

So this is my command line 's definition: GeneralElastic(int tag, int pathSize, Vector * backboneStrain, Vector * backboneStress); I have tried this to parse the arguments: UniaxialMaterial *theMaterial = 0; int iData[2]; // tag in first position, number of points in second position Vector * eData; ...

Hi everyone, I'm developing a new material in OpenSEES, with 3 arguments, namely, tag and two vectors: stress and strain points which define a stress-strain general path. For any new material, we need to parse the command line in order to achieve the values of the arguments. In the elementAPI there ...

I got this problem solved. I just recommend you being careful when writing the "working directory". This must be the location of the .dll, opensees.exe and .tcl archives.

Hi everybody, I'm developing a new material for OpenSEES. I have already generated the dll file but it does not work properly yet, so I have to debug it (with VS 2005). Does anybody know how to debug this dll while executing OpenSEES.exe? I have gone through the following instructions: http://msdn.m...